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CN109851853B - Low-temperature sintering high-temperature infusible ceramic filler and preparation method thereof - Google Patents

Low-temperature sintering high-temperature infusible ceramic filler and preparation method thereof Download PDF

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CN109851853B
CN109851853B CN201910068290.6A CN201910068290A CN109851853B CN 109851853 B CN109851853 B CN 109851853B CN 201910068290 A CN201910068290 A CN 201910068290A CN 109851853 B CN109851853 B CN 109851853B
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CN109851853A (en
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肖扬华
邓娇容
甘祖荣
常红丽
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Shenzhen Jinhaohui Industrial Development Co ltd
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Abstract

The invention discloses a low-temperature sintering high-temperature infusible ceramic filler and a preparation method thereof, comprising the following steps: 15-60 parts of refractory fiber A, 8-50 parts of refractory fiber B, 6-20 parts of red phosphorus or phosphate, 1-10 parts of metal hydrate, 2-20 parts of metal oxide, 30-70 parts of low-melting-point ceramic hot-melt adhesive and 0.3-7 parts of hydrophobic modifier or cross-linkable coating agent; the filler is at least one of a mixture, a eutectic homogeneous substance or a eutectic homogeneous substance, and is in a fibrous shape, a powdery shape or a granular shape; the preparation method comprises a hydrophobic modification or crosslinking coating process and a modification coating device of a fin nano compound machine. Respectively adding the high polymer-based low-temperature sintered high-temperature infusible ceramic powder into PA6, PE, PP and other base materials, wherein the sintering point of the product is as low as 423 ℃, and the softening point is above 950 ℃; the method has the advantages of wide applicability, simple process, low cost and feasible large-scale industrialization on technical economy.

Description

Low-temperature sintering high-temperature infusible ceramic filler and preparation method thereof
Technical Field
The invention belongs to the field of functional powder manufacturing for ceramic high polymer matrix composite materials, and particularly relates to a functional additive technology which can enable a high polymer matrix composite material to be sintered at a lower temperature and become a refractory insulating ceramic which is not softened at a higher temperature, namely a low-temperature sintered and high-temperature infusible ceramic filler and a preparation method thereof.
Background
High polymer-based composite materials added with fillers, such as composite engineering plastics, coatings, adhesives, sealants, elastomers and foams, are widely applied to various fields of high-rise buildings, aerospace, submarines and ships, rail transit, electronic and electric power, information engineering, household appliances, machinery, chemical engineering and the like because of light weight, easy processing and molding, easily available resources and low price. However, due to the flammability of most polymers themselves, their superior properties and their use have not been fully exploited. In fact, since the birth of the high polymer, efforts have been made to improve the flame retardancy or fire resistance of the high polymer by introducing flame retardant groups into the molecular chain or adding flame retardants into the base material, and remarkable progress has been made. For example, the flame retardance of the high polymer can meet the requirements of B/T2406.2, B/T24030 and B/T5169.16, or meet the requirements of the highest flame retardant standard of UL 94V 0 grade and UL 224, or meet the requirements of VW-1 of the highest flame retardant standard of wires and cables by adding polybrominated biphenyls, polybrominated diphenyl ethers and antimony trioxide, adding aluminum hydroxide, magnesium hydroxide and calcium hydroxide, and adding ammonium polyphosphate and powder of pentaerythritol, melamine and the like.
However, the flame retardant level is still difficult to meet the stricter fire-resistant standard requirements in the fields of modern super high-rise buildings, aerospace, rail transit, submarines, ships and the like. For example, the requirement of A grade of B30624 fireproof design can not be met, and the requirement of resisting the temperature of 950 ℃ for at least 180min in the electrical and fireproof specifications of buildings can not be met.
Therefore, around 2007, the domestic engineers have developed the research of using the ceramic silicon rubber as the high polymer fireproof and fire-resistant material.
In 2007-2013 years, qualified ceramic silicon rubber products are produced, the products can pass BS 6387 standard spraying, vibrating and fire-resisting tests, but the tensile strength and rigidity of the silicon rubber are too low, the cost is too high, the ceramic forming temperature is more than 600 ℃ in 1, the limitation of the application range and the market potential is difficult to break through in 2,3, and the ceramic silicon rubber products are not popularized on a large scale and are sold on the market.
In 2013-2017, people try to invent a ceramic polyolefin composite material to replace ceramic silicon rubber, for example:
CN 105348627A a fire-resistant polyolefin cable material;
CN 104558805A a ceramic polyolefin material and a preparation method thereof;
CN 106336563A a ceramic polyolefin cable material and a preparation method thereof;
CN 105778239A a fire-resistant polyolefin cable material;
a halogen-free flame-retardant ceramic polyolefin cable material for a CN 105367965A fire-resistant cable and a preparation method thereof;
CN 104744794A ceramic fire-resistant polyethylene and a preparation method thereof, and the like.
Although, the above-mentioned patent application discloses the following technical features:
a) the polyolefin used includes EVA, PE, PP, PS, PVC, ethylene-alpha-olefin copolymer (alpha-propylene, alpha-butene, alpha-hexene, alpha-octene) with low oxygen-containing group;
b) the porcelainizing materials comprise porcelainizing powder A, porcelainizing powder B, porcelainizing powder C, kaolin, talcum powder, mica powder, pyrophyllite, ascharite, borocalcite, calcite, wollastonite, spodumene, clay, montmorillonite and pottery clay;
c) the flame retardant comprises Sb2O3, Al (OH)3, M parts (OH)2, basic magnesium carbonate, kaolin, zinc borate, ammonium borate, borax, boric anhydride, APP and red phosphorus;
d) the auxiliary agent comprises a platinum element catalyst or a peroxide initiator;
e) wherein the ceramic powder A comprises attapulgite, bentonite, montmorillonite, mica, glass fiber, alumina nanotube, calcium silicate, wollastonite, calcium carbonate whisker, calcium sulfate whisker, aluminum borate whisker, SiO2, Al2O3, ferric oxide, M part of O, ZnO, BaO, CaO, carbon black, brucite, waste ceramic, forsterite, tin-bismuth alloy and bone meal;
f) wherein the porcelainized powder B is not disclosed;
g) wherein the porcelainized powder C is an unpublished component;
h) wherein the high softening point glass is named as (700-800) DEG C, and comprises silicate glass powder, borate glass powder, calcium oxide glass powder and bismuth oxide glass powder which are not disclosed in component proportion;
i) wherein the glass with the lower melting point is (400-600) DEG C and comprises silicate glass powder, borate glass powder, calcium oxide glass powder and phosphate glass powder, and the mixture ratio of the components is not disclosed.
However, after a team of penmen deeply studies and tests, the above patent applications all have the following defects which are difficult to be tolerated by the market:
defect one
It is only applicable to hydrocarbon base stock alone, but not to a broad spectrum of high polymers, such as PA, PU, PET, PBT, PAA which are not suitable for high oxygen-containing groups.
Defect two
The porcelain forming temperatures are all above 500 ℃, resulting in only powdering of the combustion products and no porcelain formation.
Defect three
The hardness of the ceramic pencil of the ceramic polyolefin is lower than 3H, even lower than 2H, and the engineering application value is low.
Defect four
The water absorption or water solubility is too strong, which is not suitable for the field of electronic and electric insulation and is not suitable for outdoor environment.
Defect five
During the process of converting the high polymer into ceramic by burning, the high polymer is easy to liquefy and collapse and cannot keep the original shape of the product.
Further research shows that, because of five defects in functional design, the ceramic polyolefin product still has no expert consensus and client acceptance in tests, lacks of market practicability and cannot be put into industrial production so far, because the ceramic filler used lacks of sufficient quantity of key components with 'two ends' of softening point lower than 500 ℃ and melting point higher than 950 ℃, namely low-temperature sintering hot melt adhesive and framework which can not be collapsed by ultrahigh-temperature sintering.
Therefore, it is necessary to invent a functional material which is used for a broad-spectrum high polymer-based composite material and does not melt at the sintering point of below 500 ℃ and below 950 ℃, which is an essential key and important component for realizing the ceramization of a high polymer base material, and the hardness of the high polymer-based ceramic pencil is ensured to reach 4H or above, and the ceramic pencil is suitable for the field of electronic and electric insulation, is suitable for outdoor environment, and can keep the original shape of a product without collapsing under the fire environment.
Reference to the literature
[1] Xizhong pottery silicone rubber industry, volume 60, 2013-07-24
[2] ALexander parts Chen parts YB, Burford RP, et al fire Resistant Silicone Polymer Compositions [ P ] US: USP 7652090B 2, 2010-01-26
[3] Preparation and properties of porbin, zhangqishi, wuli et al ceramizable silicon rubber [ J ] Nanjing university of industry (Nature science edition), 2011.33 (1): 48-51
Disclosure of Invention
The invention aims to provide a functional material which is used for a broad-spectrum high polymer-based composite material and can not melt the high polymer-based composite material with the sintering point lower than 500 ℃ and lower than 950 ℃, the functional material becomes an indispensable key important component for realizing the ceramization of a high polymer base material, so that the hardness of a high polymer-based ceramic pencil can be ensured to reach 4H or more, and the functional material is suitable for the field of electronic and electric insulation, is suitable for outdoor environment and can keep the original shape of a product without collapsing under the fire environment.
In order to achieve one of the above objects, the low-temperature sintering high-temperature infusible ceramizing filler of the present invention comprises: the formula comprises, by mass, 15-60 parts of refractory fiber A, 8-50 parts of refractory fiber B, 6-20 parts of red phosphorus or phosphate, 1-10 parts of metal hydrate, 2-20 parts of metal oxide, 30-70 parts of low-melting-point ceramic hot-melt adhesive and 0.3-7 parts of hydrophobic modifier or cross-linkable coating agent; the formula comprises at least one of a mixture, a eutectic homogeneous substance or a eutectic homogeneous substance, and the mixture is in a fibrous, powdery or granular state.
Further, the refractory fiber a includes: the main component of the particles with the length-diameter ratio of 4-30 times and the diameter of 0.3-30 μm is at least one of silicon nitride, aluminum oxide, silicon carbide, magnesium silicate, calcium silicate, aluminum silicate, magnesium phosphate, calcium phosphate, aluminum phosphate and mineral wool; the main component is the chemical component with the largest mass content in the homogeneous substance.
Further, the refractory fiber B comprises: the particles have an aspect ratio of 2 to 15 times and a diameter of 0.1 to 5 μm, and the main component is at least one of silicon nitride, alumina, silicon carbide, magnesium silicate, calcium silicate, aluminum silicate, magnesium phosphate, calcium phosphate, aluminum phosphate, and mineral wool; the main component is the chemical component with the largest mass content in the homogeneous substance.
Further, the red phosphorus includes: either organic material-coated or inorganic material-coated, and has a particle diameter in the range of (3 to 35) μm. Further, the phosphate salts include: at least one of a group A phosphate and a group B phosphate; the group A phosphate is a product formed by combining at least one of sodium ions, potassium ions, magnesium ions, calcium ions, aluminum ions, zinc ions and organic or inorganic ammonium ions with at least one of phosphate radicals, pyrophosphate radicals, metaphosphate radicals, hypophosphite radicals and phosphite radicals; the phosphate B is a product formed by combining at least one of sodium ions, potassium ions, magnesium ions, calcium ions, aluminum ions, zinc ions and organic or inorganic ammonium ions with polyphosphate with the polymerization degree of (2-2000).
Further, the metal hydrate includes: at least one of calcium hydroxide, aluminum hydroxide, magnesium hydroxide, basic aluminum magnesium carbonate, basic zinc carbonate and basic copper carbonate.
Further, the metal oxide includes: at least one of oxides of lithium, sodium, potassium, magnesium, calcium, aluminum, zinc, barium, iron, copper and antimony elements.
Further, the low melting point ceramized hot melt adhesive comprises: the formula comprises a formula A and a formula B which are measured according to parts by mass; the A type formula is measured according to the addition amount of raw materials, and comprises 1-50 parts of silicate, 5-70 parts of borate, 0.1-44 parts of carbonate, 0.1-70 parts of phosphate and 1-30 parts of halide; the B-type formula is measured according to the chemical component analysis result of a finished hot-melt adhesive product for the low-melting-point ceramic material, and comprises (2.4-28.4)% of silicon dioxide, 11.9-39.8)% of boron trioxide, 48.6-61.4)% of metal oxide, 0.01-28.4)% of phosphorus pentoxide and 2.9-19.3)% of halogen; the A-type formula and the B-type formula are at least one of a mixture, a eutectic homogeneous substance or a powder or a particle.
Further, the hydrophobic modifier or the crosslinkable coating agent includes: at least one of coconut oleic acid, zinc laurate, linoleic acid, ethyl orthosilicate, dodecylbenzenesulfonic acid, ethyl maltol, benzotriazole, glycerol monolaurate, p-methylphenylacetic acid, stearic acid, zinc stearate, gamma- (2, 3-glycidoxy) propyl trimethoxysilane, gamma-methacryloxypropyl trimethoxysilane, triethoxyvinylsilane, vinyltrimethoxysilane, vinyltris (beta-methoxyethoxy) silane, hexadecyltrimethoxysilane and hexamethyldisilazane.
Further, the silicate comprises: the product is compounded by at least one of sodium, potassium, magnesium, calcium, barium, aluminum, zinc ions or elements and silicic acid and/or silicon dioxide.
Further, the borate comprises: the product is compounded by at least one of ammonium, sodium, potassium and zinc ions or elements and at least one of metaborate, borate, polyborate and boron trioxide.
Further, the carbonate salt includes: at least one of lithium carbonate, sodium bicarbonate, potassium carbonate, barium carbonate, zinc carbonate, ferrous carbonate and carbon type copper carbonate.
Further, the halide includes: the product is formed by combining at least one of ions or elements of magnesium, calcium, aluminum, copper, zinc, chromium, iron, cobalt, tin, silver, gadolinium and gallium with halogen; the halogen has at least one of fluorine, chlorine, bromine, iodine ions or elements.
To achieve the second object, the present invention provides a method for preparing a low-temperature sintering high-temperature infusible ceramic filler, comprising: pre-drying, hydrophobic modification or cross-linking coating, and re-drying, wherein if the water content of the raw material is 1.0% or less by mass, the pre-drying process can be absent; the hydrophobic modification or crosslinking coating process step adopts at least one of a honeycomb mill, a high-stirring machine, a rake mixer, a pant mixer and a fin nano compound machine, the formula composition materials are placed in a modification coating device in advance or continuously, a hydrophobic modifier or a crosslinking coating agent is added or continuously dripped/sprayed into the formula composition materials in advance, the modification coating device is opened, the temperature (65-130) DEG C of the formula composition materials is maintained for 15 minutes to 2.5 hours, and then the drying process step is carried out to remove the moisture, alcohol or ammonia low molecular substances generated by the chemical reaction of the hydrophobic modifier or the crosslinking coating agent and the formula composition materials.
Further, the configuration of the fin nano compound machine has: the wing-ridge type stator and the wing-ridge type rotor are coaxially, hierarchically, alternately and mutually nested on a concentric shaft, for example, the stator and the adjacent layer of the rotor can mutually rotate according to any one coaxial nesting mode of 'fixed layer-rotating layer-fixed layer-rotating layer' or 'rotating layer-fixed layer-rotating layer', 'fixed layer-rotating layer-fixed layer' or 'fixed layer-rotating layer'; the number of layers of the stator is at least one, the number of layers of the rotor is at least one, or the total number of layers of the stator is more than 1, the total number of layers of the rotor is more than 1, and the difference between the total number of layers of the stator and the total number of layers of the rotor is 1 or 0.
The fin ribs are fins or rib ribs which are parallel to the axis are respectively arranged on the inner cylindrical surface and the outer cylindrical surface of the stator and/or the rotor, the blade distance of the fin ribs between the stator and the rotor is within the range of (0.1-1.5) mm, at least one radial through hole is arranged in a gap between each pair of adjacent fin ribs of each layer of stator and/or each layer of rotor, the shape of each through hole is arbitrary, and one of a rectangle, a circle and a kidney is preferably selected for processing convenience; the parallel distance between the wing ridges of the stator or the rotor is within the range of (1-25) mm; the curvature radius of the blade of the wing edge is within the range of (0.05-2) mm.
Further, the re-drying process step comprises: at least one of layered static drying by an oven, continuous drying by a fluidized bed or continuous drying by a flash tower; the drying temperature is controlled to be (65-130) DEG C, the thickness of the static drying layer is below 200mm, the drying time is (2-4) h, and the drying time of the fluidized bed or the flash tower is (2-130) s.
The low-temperature sintering high-temperature infusible ceramic filler and the preparation method thereof have the beneficial technical effects that:
sintering point of the ceramic filler is below 500 ℃, and softening point is above 950 ℃;
the applicability is wide, and PA, PU, PET, PBT, PAA, EVA, PE, PP, PS and PVC can be all ceramic-processed;
the process is simple, and the existing technological equipment of the honeycomb mill, the high-speed stirrer, the rake mixer and the pant mixer can be utilized;
fourthly, the raw materials and resources are easy to obtain, the cost is low, and the large-scale industrialization is feasible in technical economy.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the low-temperature sintering high-temperature infusible ceramic filler and the preparation method thereof in detail, the following is further described with reference to the examples.
The formulation of six examples of low temperature sintered high temperature infusible ceramic fillers is preferred and is shown in table 1.
The raw material formula comprises calcium silicate fiber A, calcium silicate fiber B, ammonium polyphosphate, aluminum hypophosphite, sodium hexametaphosphate, aluminum hydroxide, magnesium hydroxide, zinc oxide and a self-made low-melting-point ceramic hot-melt adhesive, which are in powder forms, and the particle sizes and the mass parts of the raw materials are shown in table 1.
Wherein the calcium silicate fibers A have an average aspect ratio of 27 and the calcium silicate fibers B have an average aspect ratio of 8.
Wherein the nominal degree of polymerization of the ammonium polyphosphate is 1000.
Wherein the low-melting point ceramic hot-melt adhesive is self-made, and the softening point measured by a step curve method is 423 ℃.
Wherein the hydrophobic modifier is 0.8 part of hexadecyl trimethoxy silane, and the cross-linkable coating agent is 3.0 parts of tetraethoxysilane.
The preparation method of the low-temperature sintering high-temperature infusible ceramic filler comprises the following steps: pre-drying, hydrophobic modification or cross-linking coating, and re-drying; the hydrophobic modification and crosslinking coating process step adopts a self-made concha nano compound machine, the materials of the formula shown in the table 1, a hydrophobic modifier and a crosslinkable coating agent are added into the materials of the formula shown in the table 1 in advance, modified coating equipment is started to operate, the temperature of the materials of the formula is maintained at 120 ℃ for 45 minutes, and then the materials are transferred to a drying process step to remove the hydrophobic modifier or the crosslinkable coating agent and powder to generate methanol and ethanol due to chemical reaction.
Wherein, the arris nanometer compounding machine has: a stator with parallel fins on the inner circumference and a rotor with parallel fins on the outer circumference; the clearance between the fins of the stator and the rotor is 0.15 mm; the parallel distance between the fins of the stator or the rotor is 15 mm; the radius of curvature of the blade is 0.8 mm.
Wherein, the re-drying process step adopts an oven for layering and static drying; the drying temperature is controlled to be (120 +/-2) DEG C, the thickness of a static drying layer is (10-13) mm, and the drying time is 2 h.
Thereafter, the solubility of the polymer-based low-temperature sintered high-temperature infusible ceramized powder as a finished product and the comparative example were measured, and are shown in Table 2.
As can be seen from table 2, the greater than 90% reduction in solubility of the six examples compared to the comparative example is one of the breakthrough advances.
Then, the high polymer-based low-temperature sintering high-temperature infusible ceramic powder is respectively added into PA6, PE and PP finished products and comparative examples, and the ceramic forming temperature and the ceramic forming pencil hardness of the high polymer-based composite material are tested and shown in Table 3.
As seen from Table 3, the reduction of the porcelain forming temperature of the six examples by more than 130 ℃ compared with the commercial ceramic powder comparative example is one of breakthrough progresses; the hardness of the porcelain-forming pencil of the six examples burned at 600 ℃ was 4H or more and did not collapse at 1200 ℃ while that of the comparative example was 3H or less and collapsed at 820 ℃.
The low-temperature sintering high-temperature infusible ceramic filler and the preparation method thereof have the beneficial technical effects that:
sintering point of ceramic powder is below 500 deg.C and as low as 423 deg.C, softening point is above 950 deg.C;
secondly, the applicability is wide, and PA, PU, PET, PBT, PAA, EVA, PE, PP, PS and PVC can be completely ceramized at 423 ℃;
the process is simple, and the production line can be assembled by utilizing the existing technological equipment of the honeycomb groove mill, the high-stirring machine and the rake mixer;
fourthly, the raw materials and resources are easy to obtain, the cost is low, and the large-scale industrialization is feasible in technical economy.
Table 1 table of formulations of six examples of low temperature sintered high temperature infusible ceramic fillers
Figure BDA0001956444500000091
TABLE 2 solubility of six examples (1-6) and comparative examples
Figure BDA0001956444500000092
Figure BDA0001956444500000101
TABLE 3 porcelain formation temperature and Pencil hardness of six examples (7 to 12) and comparative example
Figure BDA0001956444500000102

Claims (10)

1. The low-temperature sintering high-temperature infusible ceramic filler is characterized by comprising the following components in percentage by weight: the formula comprises, by mass, 15-60 parts of refractory fiber A, 8-50 parts of refractory fiber B, 6-20 parts of red phosphorus or phosphate, 1-10 parts of metal hydrate, 2-20 parts of metal oxide, 30-70 parts of low-melting-point ceramic hot-melt adhesive and 0.3-7 parts of hydrophobic modifier or cross-linkable coating agent; the formula comprises at least one of a mixture, a eutectic homogeneous substance or a eutectic homogeneous substance, and the mixture is in a fibrous, powdery or granular state;
the refractory fiber A comprises: the length-diameter ratio of the particles is 4-30 times, the diameter of the particles is 0.3-30 mu m, and the main component of the particles is at least one of silicon nitride, aluminum oxide, silicon carbide, magnesium silicate, calcium silicate, aluminum silicate, magnesium phosphate, calcium phosphate, aluminum phosphate and mineral wool; the main component is a chemical component with the largest mass content in the homogeneous substance;
the refractory fiber B comprises: the length-diameter ratio of the particles is 2-15 times, the diameter of the particles is 0.1-5 mu m, and the main component of the particles is at least one of silicon nitride, aluminum oxide, silicon carbide, magnesium silicate, calcium silicate, aluminum silicate, magnesium phosphate, calcium phosphate, aluminum phosphate and mineral wool; the main component is a chemical component with the largest mass content in the homogeneous substance;
the red phosphorus comprises: any one of organic matter coating or inorganic matter coating, and the particle size is within the range of 3-35 μm;
the phosphate salts include: at least one of a group A phosphate, a group B phosphate, or a mixture of a group A phosphate and a group B phosphate; the group A phosphate comprises a product of combination of at least one of sodium, potassium, magnesium, calcium, aluminum, zinc, and organic or inorganic ammonium ions with at least one of phosphate, pyrophosphate, metaphosphate, hypophosphite, and phosphite; the phosphate B is a product formed by combining at least one of ions of sodium, potassium, magnesium, calcium, aluminum, zinc and organic or inorganic ammonium with polyphosphate with polymerization degree within the range of 2-2000;
the metal hydrate includes: at least one of calcium hydroxide, aluminum hydroxide, magnesium hydroxide, basic aluminum magnesium carbonate, basic zinc carbonate and basic copper carbonate;
the metal oxide includes: at least one of oxides of lithium, sodium, potassium, magnesium, calcium, aluminum, zinc, barium, iron, copper and antimony elements;
the low melting point ceramized hot melt adhesive comprises: the formula comprises a formula A and a formula B which are measured according to parts by mass; the A type formula is measured according to the addition amount of raw materials, and comprises 1-50 parts of silicate, 5-70 parts of borate, 0.1-44 parts of carbonate, 0.1-70 parts of phosphate and 1-30 parts of halide; the B type formula is measured according to the chemical component analysis result of a finished hot melt adhesive product for the low melting point ceramic material, and comprises 2.4-28.4% of silicon dioxide, 11.9-39.8% of boron trioxide, 48.6-61.4% of metal oxide, 0.01-28.4% of phosphorus pentoxide and 2.9-19.3% of halogen; the A-type formula and the B-type formula are at least one of a mixture, a eutectic homogeneous substance or a powder or a particle.
2. Ceramicized filler according to claim 1, characterized in that the hydrophobic modifier or crosslinkable coating agent comprises: at least one of coconut oleic acid, zinc laurate, linoleic acid, ethyl orthosilicate, dodecylbenzenesulfonic acid, ethyl maltol, benzotriazole, glycerol monolaurate, p-methylphenylacetic acid, stearic acid, zinc stearate, gamma- (2, 3-glycidoxy) propyl trimethoxysilane, gamma-methacryloxypropyl trimethoxysilane, triethoxyvinylsilane, vinyltrimethoxysilane, vinyltris (beta-methoxyethoxy) silane, hexadecyltrimethoxysilane and hexamethyldisilazane.
3. Ceramifying filler according to claim 2, characterized in that the silicate comprises: the product is compounded by at least one of sodium, potassium, magnesium, calcium, barium, aluminum, zinc ions or elements and silicic acid and/or silicon dioxide.
4. The ceramifying filler according to claim 2, wherein the borate comprises: the product is compounded by at least one of ammonium, sodium, potassium and zinc ions or elements and at least one of metaborate, borate, polyborate and boron trioxide.
5. Ceramifying filler according to claim 2, characterized in that the carbonate comprises: at least one of lithium carbonate, sodium bicarbonate, potassium carbonate, barium carbonate, zinc carbonate, ferrous carbonate and carbon type copper carbonate.
6. Ceramifying filler according to claim 2, characterized in that the halide comprises: the product is formed by combining at least one of ions or elements of magnesium, calcium, aluminum, copper, zinc, chromium, iron, cobalt, tin, silver, gadolinium and gallium with halogen; the halogen has at least one of fluorine, chlorine, bromine, iodine ions or elements.
7. The method for preparing the low-temperature sintering high-temperature infusible ceramic filler according to any one of claims 1 to 6, characterized by comprising: pre-drying, hydrophobic modification or cross-linking coating, and re-drying, wherein if the water content of the raw material is 1.0% or less by mass, the pre-drying process can be absent; the hydrophobic modification or crosslinking coating process step adopts at least one of a honeycomb mill, a high stirring machine, a rake mixer, a pant mixer and a fin nano compound machine, the formula composition materials are placed in a modification coating device in advance or continuously, a hydrophobic modifier or a crosslinking coating agent is added or continuously dripped/sprayed into the formula composition materials in advance, the modification coating device is opened, the temperature of the formula composition materials is maintained at 65-130 ℃ for 15 minutes to 2.5 hours, and then the drying process step is carried out to remove moisture, alcohol or ammonia low molecular substances generated by chemical reaction of the hydrophobic modifier or the crosslinking coating agent and the formula composition materials.
8. The process for the preparation of ceramized fillers according to claim 7 wherein the configuration of the ridge nano compound machine has: the wing-ridge type stator and the wing-ridge type rotor are coaxially, hierarchically, alternately and mutually nested on a concentric shaft, and the stator and the adjacent layer of the rotor can rotate mutually according to any one coaxial nesting mode of 'fixed layer-rotating layer-fixed layer-rotating layer' or 'rotating layer-fixed layer-rotating layer', 'fixed layer-rotating layer-fixed layer' or 'fixed layer-rotating layer'; the number of layers of the stator is at least one, the number of layers of the rotor is at least one, or the total number of layers of the stator is more than 1, the total number of layers of the rotor is more than 1, and the difference between the total number of layers of the stator and the total number of layers of the rotor is 1 or 0.
9. The preparation method of the ceramic filler according to claim 8, wherein the wing ridges are fins or ridge ribs which are parallel to the axis and are respectively arranged on the inner cylindrical surface and the outer cylindrical surface of the stator and/or the rotor, the blade distance of the wing ridges between the stator and the rotor is within the range of 0.1-1.5 mm, and at least one radial through hole is arranged in a gap between each pair of adjacent wing ridges of each layer of the stator and/or each layer of the rotor; the parallel distance between the wing ridges of the stator or the rotor is within the range of 1-25 mm; the curvature radius of the blade of the wing edge is within the range of 0.05-2 mm.
10. The method for preparing a ceramicized filler according to claim 7, wherein the re-drying process step comprises: at least one of layered static drying by an oven, continuous drying by a fluidized bed or continuous drying by a flash tower; the drying temperature is controlled to be 65-130 ℃, the thickness of the static drying layer is below 200mm, the drying time is 2-4 h, and the drying time of the fluidized bed or the flash tower is 2-130 s.
CN201910068290.6A 2019-01-24 2019-01-24 Low-temperature sintering high-temperature infusible ceramic filler and preparation method thereof Active CN109851853B (en)

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