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WO2002006030A1 - Procede permettant d'enduire une surface d'une couche permanente de separation, une couche de separation obtenue par ce procede et utilisation de ladite couche - Google Patents

Procede permettant d'enduire une surface d'une couche permanente de separation, une couche de separation obtenue par ce procede et utilisation de ladite couche Download PDF

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Publication number
WO2002006030A1
WO2002006030A1 PCT/DE2001/002462 DE0102462W WO0206030A1 WO 2002006030 A1 WO2002006030 A1 WO 2002006030A1 DE 0102462 W DE0102462 W DE 0102462W WO 0206030 A1 WO0206030 A1 WO 0206030A1
Authority
WO
WIPO (PCT)
Prior art keywords
separating layer
reactants
coating
permanent
network
Prior art date
Application number
PCT/DE2001/002462
Other languages
German (de)
English (en)
Inventor
Horst Wochnowski
Holger Klyszcz-Nasko
Original Assignee
Acmos Chemie Gmbh & Co.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Acmos Chemie Gmbh & Co. filed Critical Acmos Chemie Gmbh & Co.
Priority to AU2001276300A priority Critical patent/AU2001276300A1/en
Publication of WO2002006030A1 publication Critical patent/WO2002006030A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
    • B29C33/64—Silicone

Definitions

  • the present invention relates to a method for coating a surface, in particular a molding tool, with a permanent separating layer, a separating layer produced by the method and the use thereof.
  • the produced part adheres to the mold surface and cannot be removed without destroying it.
  • the effect of the mold release agent is based on reducing the adhesion between the interfaces.
  • Release agent systems are known from the prior art, for example in the form of solutions or dispersions, which are normally sprayed onto the surface of the molding tool manually or by automatic means. These release agent systems consist of active release agents and a carrier medium, usually solvents such as, for example Hydrocarbons and water. Such sprayed-on release agent systems essentially always separate the molded part from the molded tool by a mixture of a cohesive break and an adhesive break, but mostly release agent remains on the molded part to be separated. In many cases, this can lead to difficulties in further processing, for example when gluing, laminating, painting or metallizing the molded part. A cleaning step must therefore be interposed, which causes additional costs.
  • release agents must always be applied to the surface of the shaping tools before each molding, which is also expensive and can lead to uneven demolding results. After all, these release agent systems emit significant amounts of solvents into the environment. When using water as a carrier medium, in addition to the high costs for aqueous release agents, there is also the disadvantage that the emulsifier systems used there can also lead to health disorders.
  • the object of the present invention is to overcome the disadvantages of the prior art and to provide a method for coating a surface which is on the surface provides an excellent adhesive and also excellent separating coating that is so stable that its properties are permanently retained.
  • Another object of the present invention is to provide a corresponding separating layer and to enable its use.
  • a separation layer with a gradient layer structure is formed by time variation of the production conditions, such as, for example, the type of reactants, the order of addition of the reactants, the molar ratio of the reactants, the production temperature and / or pressure.
  • the separating layer is formed with a gradient layer structure by polymerization, such as polycondensation, polyaddition or other crosslinking of the reactants.
  • the surface be cleaned before coating.
  • the gradient layer structure is formed in the separating layer by:
  • a stepless gradient layer structure is formed.
  • a discontinuous gradient layer structure is formed.
  • the reactants be cured preferably thermally, by means of UV radiation and / or by means of IR radiation.
  • chloroalkylsilanes alkylsilane ethers, hydroxyl-end-blocked dimethylpolysiloxane and crosslinking agents, hydroxyl-end-blocked dimethylpolysiloxane and tetraethylsilicate, or hexamethyldisiloxane are used as reactants.
  • the invention further relates to a dry, permanent separating layer for a surface, in particular a molding tool, which is produced by the method according to the invention.
  • the surface of the separating layer according to the invention is largely no longer reactive.
  • the separating layer is mechanically, physically-chemically and thermally stable in the field of application as a functioning permanent separating layer.
  • the separating layer is resistant to common solvents such as gasoline, isopropanol or the like.
  • the separating layer according to the invention has a gradient layer structure that transitions from an inorganic network into an organic network.
  • the inorganic network is applied directly to the surface, in particular a molding tool, and the organic network is applied to the inorganic network.
  • the organic network has a high proportion of CH 3 and / or CF 3 groups.
  • the organic network comprises fluorocarbons and / or fluorosilicanes.
  • the organic network is closed, free of pores and provided with a high crosslinking density.
  • the separating layer is resistant up to temperatures of 350 ° C.
  • post-coating can be carried out.
  • the separating layer is preferably easy to clean with benzine or the like and a soft cloth or the like.
  • a separation layer for use in plastics processing, wood, paper and glass processing, metal processing, food and pharmaceutical processing, and in the coating of films is proposed. It can preferably be provided that the separating layer is used with a molding tool for reaction plastics to be molded, such as, for example, polyurethanes, polyester resins, melamine resins, epoxy resins, or the like.
  • the gradient layer structure of the separating layer should be designed in such a way that a transition from an adhesion promoter, in the form of a particularly stable, hydrophobic base layer, is made possible on the surface of the molding tool to the actual separating layer in the direction of the molded part, the separating effect increasing in this direction.
  • the invention is therefore based on the surprising finding that with the aid of the method according to the invention a separating layer is provided which adheres very well to the surface, for example a molding tool, and also provides an excellent separating action with respect to the molding.
  • the method according to the invention provides a double-functional separating layer which develops an optimal adhesion to the molding tool surface and an optimal separation to the molding.
  • the separating layer remains permanently on the surface of the molding tool and minimizes the forces that lead to fracture of the adhesion directly at the interface between the separating layer and the molding surface, with the result that the molding is easily removed from the mold.
  • the separating layer according to the invention with a gradient layer structure has the advantage over the single-substance coatings known from the prior art that it adheres well to the substrate, is mechanically stable and merges into a soft, quasi-fluid separating layer.
  • the gradient layer structure can also, for example, compensate for minor defects which can be caused by mechanical influences to a large extent without the separating layer no longer being usable.
  • the addition of external and / or internal release agents is not necessary.
  • the separating layer produced by the method according to the invention also enables the molded part to be removed from the mold tools undamaged, provides a desired surface quality of the molded parts, for example no flow defects, no open surface structures, good haptics, etc., and also enables a good finish, that is to say without interposition
  • the molded parts can be removed, for example by Gluing, laminating, painting or metallizing, further processed.
  • a build-up in the form is avoided, the separating layer produced by the method according to the invention is environmentally friendly and inexpensive since it represents a permanent separating layer.
  • the example of a silicone separation layer shows how a separation layer with a gradient layer structure can be produced:
  • silane triols RSi (OH) 3 leads to the formation of layer structures of the product composition RSiO 3 , the expansion and crosslinking of which can be varied as desired by appropriate admixtures of silane diols and silanols.
  • Silanols R 3 -SiOH act as chain end groups, silanediols R 2 Si (OH) 2 as the middle chain link and silanetriols RSi (OH) 3 as branching point.
  • the average degree of polymerization can be adjusted and, in this way, specific silicone structures can be built up with characteristic, largely gradable properties, which, depending on their molecular size and structure, are volatile, oily, greasy and solid resinous or rubber-like substances and can be used as multi-functional systems with effective separation.
  • the inorganic, highly adherent network described above can be produced, for example, on the substrate surface after mechanical, physical and, if appropriate, chemical cleaning of the surface, by polycondensation after application of the reactants to the surface.
  • inorganic layers are replaced by organic, in particular methyl-rich, so that an increasingly closed organic network is formed which, in the top layer, for example because of the freely rotatable methyl groups, produces a quasi-fluid medium which has extremely separating properties.
  • chloroalkylsilanes are used, a liquid film is applied to the surface, for example a molding tool, and after the carrier liquid has evaporated there is first hydrolyzed with the presence of atmospheric moisture, with silicone layers of varying strength being formed depending on the composition of the chloroalkylsilanes.
  • An inorganic network is built up by polycondensation ( ⁇ Si-O-Si ⁇ ).
  • crosslinking reactions with e.g. the separation-friendly organic network is built up on Si-bound methyl-rich monomers (known sol-gel process).
  • Curing can take place using IR or UV light, but also purely thermally.
  • preference should be given to working in the nano range.
  • crosslinking can be prevented in the absence of water. An excess of crosslinker causes water to be excluded and the reaction to start prematurely.
  • a separating layer according to the invention can be produced by plasma polymerization of hexamethyldisiloxane (HMDSO).
  • the separating layers produced by the method according to the invention were each detected by photoelectron spectroscopy (XPS).
  • XPS photoelectron spectroscopy
  • the process according to the invention and the separating layer according to the invention can be used in all areas of plastics and rubber (rubber) processing, especially in the case of reaction plastics, such as polyurethane, epoxy, polyester and phenolic resins and thermoplastics.
  • reaction plastics such as polyurethane, epoxy, polyester and phenolic resins and thermoplastics.
  • separation problems in wood and paper, metal and glass processing, the food and pharmaceutical industries can also be solved by the method and the separation layer according to the invention. It is also possible to coat films with the separating layers according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé permettant d'enduire une surface, en particulier un outil de moulage, d'une couche permanente de séparation. Selon ce procédé, on obtient une couche permanente de séparation d'une structure de couche à gradient d'indice par variation temporelle des conditions de production, telle que du type de réactifs, des additions successives de réactifs, du rapport molaire des réactifs, de la température et/ou pression de production. La présente invention concerne également une couche de séparation obtenue par ce procédé et l'utilisation de ladite couche.
PCT/DE2001/002462 2000-07-17 2001-06-29 Procede permettant d'enduire une surface d'une couche permanente de separation, une couche de separation obtenue par ce procede et utilisation de ladite couche WO2002006030A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001276300A AU2001276300A1 (en) 2000-07-17 2001-06-29 Method for coating a surface with a permanent separating layer, a permanent separating layer produced by said method and use thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10034739.8 2000-07-17
DE2000134739 DE10034739A1 (de) 2000-07-17 2000-07-17 Verfahren zur Beschichtung einer Oberfläche mit einer permanenten Trennschicht, eine nach dem Verfahren hergestellte Trennschicht und deren Verwendung

Publications (1)

Publication Number Publication Date
WO2002006030A1 true WO2002006030A1 (fr) 2002-01-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/002462 WO2002006030A1 (fr) 2000-07-17 2001-06-29 Procede permettant d'enduire une surface d'une couche permanente de separation, une couche de separation obtenue par ce procede et utilisation de ladite couche

Country Status (3)

Country Link
AU (1) AU2001276300A1 (fr)
DE (1) DE10034739A1 (fr)
WO (1) WO2002006030A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004041947A1 (fr) 2002-10-30 2004-05-21 Eurocopter Moule pour une piece en materiau composite enduit d'un produit de demoulage
WO2013092433A1 (fr) * 2011-12-20 2013-06-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Outil de moulage pour fabriquer des pièces en mousse synthétique pourvu d'un revêtement polymère hybride pour améliorer le démoulage et (hétéro)polycondensat d'acide silicique utilisé comme matériau de revêtement pour l'outil de moulage
US9175243B2 (en) 2002-10-30 2015-11-03 Airbus Helicopters Stripping composition for a mold for making a composite material part, and method of preparing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021002633A1 (de) 2021-03-01 2022-09-15 Horst Wochnowski Explosions-basierte Abscheidung von superdünnen Hartstoffschichten innerhalb eines geschlossenen Innenraums mittels eines stempelartigen, verschiebbaren Kolbenelements

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH530854A (de) * 1970-11-02 1972-11-30 Buehler Ag Geb Teilbares Formwerkzeug, Verfahren zu dessen Herstellung und Verwendung desselben
US3935291A (en) * 1973-08-28 1976-01-27 The Goodyear Tire & Rubber Company Method of molding polyurethane articles in a mold coated with three mold release agents
US4863650A (en) * 1982-10-16 1989-09-05 Teroson G.M.B.H. Process for molding and vulcanizing tires and other rubber articles
WO1990013423A1 (fr) * 1989-05-12 1990-11-15 E.I. Du Pont De Nemours And Company Revetement non adherent pour rouleaux de gaufrage
EP0502403A2 (fr) * 1991-03-04 1992-09-09 Bridgestone Corporation Agent de démoulage appliqué en solution pour vessies de vulcanisation; bags de galbage utilisées en machines à galber des pneus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681714A (en) * 1985-12-27 1987-07-21 Dow Corning Corporation Multiple release mold coating
US5601641A (en) * 1992-07-21 1997-02-11 Tse Industries, Inc. Mold release composition with polybutadiene and method of coating a mold core
KR100290801B1 (ko) * 1995-06-01 2001-10-25 야마나카 가츠도시 내열성이형성피막과그형성방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH530854A (de) * 1970-11-02 1972-11-30 Buehler Ag Geb Teilbares Formwerkzeug, Verfahren zu dessen Herstellung und Verwendung desselben
US3935291A (en) * 1973-08-28 1976-01-27 The Goodyear Tire & Rubber Company Method of molding polyurethane articles in a mold coated with three mold release agents
US4863650A (en) * 1982-10-16 1989-09-05 Teroson G.M.B.H. Process for molding and vulcanizing tires and other rubber articles
WO1990013423A1 (fr) * 1989-05-12 1990-11-15 E.I. Du Pont De Nemours And Company Revetement non adherent pour rouleaux de gaufrage
EP0502403A2 (fr) * 1991-03-04 1992-09-09 Bridgestone Corporation Agent de démoulage appliqué en solution pour vessies de vulcanisation; bags de galbage utilisées en machines à galber des pneus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004041947A1 (fr) 2002-10-30 2004-05-21 Eurocopter Moule pour une piece en materiau composite enduit d'un produit de demoulage
EP1980600A1 (fr) * 2002-10-30 2008-10-15 Eurocopter Moule pour une pièce en matériau composite enduit d'un produit de démoulage
EP2078739A1 (fr) * 2002-10-30 2009-07-15 Eurocopter Moule pour une pièce en matériau composite enduit d'un produit de démoulage
US7807090B2 (en) 2002-10-30 2010-10-05 Eurocopter Mould for a composite material part coated with a stripping product
US9175243B2 (en) 2002-10-30 2015-11-03 Airbus Helicopters Stripping composition for a mold for making a composite material part, and method of preparing
WO2013092433A1 (fr) * 2011-12-20 2013-06-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Outil de moulage pour fabriquer des pièces en mousse synthétique pourvu d'un revêtement polymère hybride pour améliorer le démoulage et (hétéro)polycondensat d'acide silicique utilisé comme matériau de revêtement pour l'outil de moulage

Also Published As

Publication number Publication date
AU2001276300A1 (en) 2002-01-30
DE10034739A1 (de) 2002-02-07

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