CN115873196A - Combined polyether, preparation method thereof and method for continuously producing high-flame-retardant environment-friendly polyurethane air conditioner board by using combined polyether - Google Patents

Abstract

The invention relates to the field of chemical synthesis of polyurethane, in particular to a combined polyether, a preparation method thereof and a method for continuously producing a high-flame-retardant environment-friendly polyurethane air conditioning plate by using the combined polyether. The invention provides a combined polyether, which comprises the following components in parts by weight: 80-100 parts of polyester polyol, 5-20 parts of polyether polyol, 0.1-4 parts of a foaming catalyst, 0.3-4 parts of a gel foaming agent, 0.3-4 parts of a trimerization catalyst, 2-8 parts of a foam stabilizer, 10-45 parts of a liquid flame retardant, 5-30 parts of a foaming agent and 0.5-3 parts of water. The high-flame-retardant environment-friendly polyurethane air-conditioning plate is prepared by mixing and foaming the combined polyether and the isocyanate according to the mass ratio of 1 (1.4-2.0) and continuously producing the high-flame-retardant environment-friendly polyurethane air-conditioning plate, and the high-flame-retardant environment-friendly polyurethane air-conditioning plate can be prepared by adjusting the using amounts of the polyester polyol with the flame-retardant characteristic and the liquid flame retardant to be matched for use, so that the synergistic effect is achieved, and the polyurethane hard foam air-conditioning plate for continuously producing the B1-level flame-retardant LBA foam can be obtained.

Description

Combined polyether and its preparation method, and method for continuously producing highly flame-retardant and environmentally friendly polyurethane air conditioning panels using the same

Technical Field

The invention relates to the field of polyurethane chemical synthesis, and in particular to a combined polyether and a preparation method thereof, and a method for continuously producing highly flame-retardant and environmentally friendly polyurethane air-conditioning panels using the combined polyether.

Background Art

Polyurethane materials have the advantages of light weight, good thermal insulation effect, good sound insulation effect, and easy construction. Various thermal insulation boards made of polyurethane materials are widely used in cold storage insulation, wall insulation and decoration. For example, ZL200510045523.9 discloses a polyurethane rigid foam board, with a layer of polymer sheet on the upper and lower sides of the polyurethane layer, and the sheet contains non-woven fabrics. ZL200920039147.6 discloses a polyurethane sheet thermal insulation decorative board, the outer side of the polyurethane foam board is attached with a coating finishing layer, and the outer side of the decorative layer is attached with a cover layer. CN215802225U discloses a PC prefabricated air conditioning board with stable support, which includes a pressure chest belt, a prefabricated board, a fixed installation steel bar and a fixed box, which requires welding and has a complex production process. The common polyurethane air conditioning board on the market is a composite production of rigid foam polyurethane and steel plate, and the production method is intermittent production, which has low production efficiency and leads to labor waste; in addition, the flame retardant level of the common polyurethane air conditioning board on the market is B3 or B2, because its flame retardant level is relatively low, it is difficult to meet the needs of actual use. Therefore, it is of great significance to develop a B1 flame-retardant and environmentally friendly polyurethane rigid foam for continuous production.

Summary of the invention

In view of the shortcomings of the prior art, the purpose of the present invention is to provide a combined polyether and a preparation method thereof. The present invention also provides a method for continuously producing highly flame-retardant and environmentally friendly polyurethane air-conditioning panels using the same, which solves the problems of low production efficiency and poor flame retardant properties of polyurethane air-conditioning panels in the prior art.

The composite polyether of the present invention comprises the following components in parts by weight:

in:

The polyester polyol is one or more of PE-B-175, AK4003, PS3158, and PS2412;

The polyether polyol is one or more of R6049 (Shanghai Dongda Chemical Co., Ltd.), YD8345 (Hebei Yadong Chemical Group Co., Ltd.), and YD8310 (Hebei Yadong Chemical Group Co., Ltd.).

The foaming catalyst is PC-5.

The gel foaming agent is PC-8.

The trimerization catalyst is K15.

The foam stabilizer is one or more of B8545, B8525, B8860 and B8872.

The liquid flame retardant is one or more of TCPP, TEP, and TCEP (all products of Jiangsu Yak Technology Co., Ltd.).

The foaming agent is LBA foaming agent produced by Honeywell.

The water is preferably deionized water.

The preparation method of the combined polyether of the present invention is to pour the components of the combined polyether into a container and mix them evenly at room temperature.

The method for continuously producing highly flame-retardant and environmentally friendly polyurethane air-conditioning panels using combined polyethers described in the present invention comprises mixing the combined polyether and isocyanate using a high-pressure foaming machine, spraying the mixture onto a steel plate through a cloth head, and then performing molding in a 60°C drying oven to obtain continuously produced highly flame-retardant and environmentally friendly polyurethane air-conditioning panels.

The isocyanate is polyphenyl polymethylene polyisocyanate (PAPI for short), which was purchased from Bayer AG, Germany.

The mass ratio of the combined polyether to the isocyanate is 1:(1.4-2.0).

In the present invention, the mixing method and conditions of the combined polyether are conventional methods and conditions in the art. Compared with the prior art, the production efficiency is improved and the flame retardant properties of the polyurethane are enhanced.

In the present invention, the foaming method and conditions are conventional methods and conditions in the art.

On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The combined polyether of the present invention can be used in combination to obtain a B1-class flame-retardant pentane foamed polyurethane continuous rigid foam board by adjusting the amount of the polyester polyol with flame-retardant properties and the liquid flame retardant to achieve a synergistic effect.

(2) The present invention is combined with an effective catalyst to improve production efficiency through a continuous foaming process, thereby obtaining a B1-level flame-retardant LBA foaming system rigid polyurethane foam air-conditioning panel for continuous production.

DETAILED DESCRIPTION

Unless otherwise indicated, implied from the context, or customary in the prior art, all parts and percentages in this application are based on weight, and the test and characterization methods used are all current as of the filing date of this application. Where applicable, the contents of any patent, patent application or publication referred to in this application are fully incorporated herein by reference, and their equivalent patent families are also incorporated by reference, especially the definitions of synthesis techniques, product and processing designs, polymers, comonomers, initiators or catalysts disclosed in these documents in the art. If the definition of a specific term disclosed in the prior art is inconsistent with any definition provided in this application, the definition of the term provided in this application shall prevail.

Numerical ranges in this application are approximate values, so unless otherwise specified, they may include numerical values outside the range. Numerical ranges include all numerical values from the lower limit to the upper limit increased by 1 unit, provided that there is an interval of at least 2 units between any lower value and any higher value. For example, if the recorded component, physical or other properties (such as molecular weight, melt index, etc.) are 100 to 1000, it means that all single values are clearly listed, such as 100, 101, 102, etc., and all sub-ranges, such as 100 to 166, 155 to 170, 198 to 200, etc. For a range comprising a numerical value less than 1 or comprising a fraction greater than 1 (such as 1.1, 1.5, etc.), 1 unit is appropriately regarded as 0.0001, 0.001, 0.01 or 0.1. For ranges containing single digit numbers less than 10 (eg, 1 to 5), typically one unit is considered to be 0.1. These are merely specific examples of what is intended, and all possible combinations of numerical values between the lowest value and the highest value enumerated are considered to be expressly stated in this application.

When used with respect to chemical compounds, unless expressly specified otherwise, the singular includes all isomeric forms and vice versa (e.g., "hexane" includes all isomers of hexane, individually or collectively). In addition, nouns using "a," "an," or "the" also include their plural forms unless expressly specified otherwise.

The terms "comprising", "including", "having" and their derivatives do not exclude the presence of any other components, steps or processes, and are irrelevant to whether these other components, steps or processes are disclosed in this application. To eliminate any doubt, unless explicitly stated, all compositions using the terms "comprising", "including", or "having" in this application may include any additional additives, adjuvants or compounds. On the contrary, except for those necessary for operating performance, the term "essentially consisting of..." excludes any other components, steps or processes from the scope of any description of the term below. The term "consisting of..." does not include any components, steps or processes that are not specifically described or listed. Unless explicitly stated, the term "or" refers to the listed individual members or any combination thereof.

Unless otherwise specified, all raw materials used in the examples are commercially available.

PE-B-175 and AK4003 described in the examples and comparative examples of the present invention were purchased from Aekyung Group of South Korea;

PS3158 and PS2412 were purchased from Jinling Stepan Chemical Co., Ltd.;

PC-5 was purchased from Evonik Specialty Chemicals GmbH;

PC-8 and K15 were purchased from Wansheng Dawei Chemical Co., Ltd.;

B8545, B8525, B8860, and B8872 were purchased from Shanghai Maitu Group Co., Ltd.

Example 1

Preparation method of combined polyether:

Put polyester polyol PS2412 (80 parts) and polyether polyol R6049 (20 parts) in a reaction kettle, and add catalyst PC-5 (0.5 parts), PC-8 (0.5 parts), K15 (2 parts), silicone oil B8545 (3 parts), deionized water (1.5 parts), TCPP (20 parts), TEP (20 parts), and LBA (20 parts) in sequence and stir well to obtain the product.

The above-mentioned combined polyether and PAPI are mixed in a high-pressure foaming machine at a mass ratio of 1:1.6, and then sprayed onto a steel plate through a cloth head, and then molded in a 60°C drying tunnel to obtain continuously produced highly flame-retardant and environmentally friendly polyurethane air-conditioning panels.

Example 2

Preparation method of combined polyether:

Put polyester polyol PE-B-175 (80 parts) and polyether polyol YD8345 (20 parts) in a reactor, and add catalyst PC-5 (0.4 parts), PC-8 (0.6 parts), K15 (1.5 parts), silicone oil B8525 (3 parts), deionized water (1.3 parts), TCPP (40 parts), and LBA (20 parts) in sequence and stir well to obtain the product.

The above-mentioned combined polyether and PAPI are mixed in a mass ratio of 1:1.7 using a high-pressure foaming machine, and then sprayed onto a steel plate through a cloth head. After being molded in a 60°C drying tunnel, highly flame-retardant and environmentally friendly polyurethane air-conditioning panels are continuously produced.

Example 3

Put polyester polyol AK4003 (90 parts) and polyether polyol YD8310 (10 parts) in a reaction kettle, and add catalyst PC-5 (0.5 parts), PC-8 (0.7 parts), K15 (1.5 parts), silicone oil B8545 (3 parts), deionized water (1.5 parts), TEP (40 parts), and LBA (15 parts) in sequence and stir well to obtain the product.

The above-mentioned combined polyether and PAPI are mixed in a high-pressure foaming machine at a mass ratio of 1:1.75, and then sprayed onto a steel plate through a cloth head, and then molded in a 60°C drying tunnel to obtain continuously produced highly flame-retardant and environmentally friendly polyurethane air-conditioning panels.

Example 4

Preparation method of combined polyether:

Put polyester polyol PS3158 (85 parts) and polyether polyol R6049 (15 parts) in a reaction kettle, and add catalyst PC-5 (0.5 parts), PC-8 (0.5 parts), K15 (2 parts), silicone oil B8545 (2 parts), B8860 (1 part), deionized water (1.5 parts), TCPP (20 parts), TCEP (20 parts), and LBA (15 parts) in sequence and stir well to obtain the product.

The above-mentioned combined polyether and PAPI are mixed in a mass ratio of 1:1.8 using a high-pressure foaming machine, and then sprayed onto a steel plate through a cloth head. After being molded in a 60°C drying tunnel, highly flame-retardant and environmentally friendly polyurethane air-conditioning panels are continuously produced.

Comparative Example 1

Put polyether polyol YD8345 (85 parts) and polyether polyol R6049 (15 parts) in a reaction kettle, and add catalyst PC-5 (0.1 parts), PC-8 (0.3 parts), K15 (1 parts), silicone oil B8545 (3 parts), deionized water (1.5 parts), TCPP (40 parts), and LBA (15 parts) in sequence and stir well to obtain the product.

The above-mentioned combined polyether and PAPI were mixed in a high-pressure foaming machine at a mass ratio of 1:1.1, then mixed with a high-pressure gun head and injected into a prefabricated mold, and compression molded in a laminator for 20 minutes to obtain a polyurethane air-conditioning panel.

Comparative Example 2

Put polyester polyol PE-B-175 (85 parts) and polyether polyol R6049 (15 parts) in a reactor, and add catalyst PC-5 (0.1 parts), PC-8 (0.3 parts), K15 (1 parts), silicone oil B8545 (3 parts), deionized water (1.5 parts), TCPP (5 parts), and LBA (15 parts) in sequence and stir well to obtain the product.

The above-mentioned combined polyether and PAPI were mixed in a high-pressure foaming machine at a mass ratio of 1:1.1, then mixed with a high-pressure gun head and injected into a prefabricated mold, and compression molded in a laminator for 20 minutes to obtain a polyurethane air-conditioning panel.

The effects of the products obtained in Examples 1 to 4 and Comparative Examples 1 to 2 were tested, and the results are shown in Table 1 below.

Table 1 Comparison of relevant data in Examples 1-4

Claims (8)

1. A composite polyether, characterized in that it comprises the following components in parts by weight:

in: The polyester polyol is one or more of PE-B-175, AK4003, PS3158, and PS2412; The polyether polyol is one or more of R6049, YD8345 and YD8310. 2. The combined polyether according to claim 1 is characterized in that the foam stabilizer is one or more of B8545, B8525, B8860, and B8872. 3. The combined polyether according to claim 1, characterized in that the liquid flame retardant is one or more of TCPP, TEP, and TCEP. 4. The combined polyether according to claim 1, characterized in that the foaming agent is a LBA foaming agent. 5. A method for preparing the combined polyether according to any one of claims 1 to 4, characterized in that the components of the combined polyether are mixed uniformly. 6. A method for continuously producing highly flame-retardant and environmentally friendly polyurethane air-conditioning panels using the combined polyether described in any one of claims 1 to 4, characterized in that the combined polyether and isocyanate are mixed using a high-pressure foaming machine, then sprayed onto a steel plate through a cloth head, and then subjected to a drying tunnel and die-casting to obtain continuously produced highly flame-retardant and environmentally friendly polyurethane air-conditioning panels. 7. The method for preparing a highly flame-retardant and environmentally friendly polyurethane air-conditioning panel according to claim 6, characterized in that the isocyanate is polyphenyl polymethylene polyisocyanate. 8. The method for preparing a highly flame-retardant and environmentally friendly polyurethane air-conditioning panel according to claim 6, characterized in that the mass ratio of the combined polyether to the isocyanate is 1:(1.4-2.0).