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Mould release agent and preparation method thereof and application of mould release agent in preparation of polyurethane mould product

A release agent and molded product technology, which is applied in the field of polyurethane molded products, can solve the problem that the release agent cannot be used repeatedly, and achieve the effects of good chemical stability, good weather resistance and good surface quality

Inactive Publication Date: 2011-09-21
毕建光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the release agent in the prior art cannot be used repeatedly, the present invention provides a new type of release agent, which can be used multiple times and can be widely used in molding products such as plastics, foam, rubber, and composite materials. Production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A release agent, 20 parts of flaky particle silicone resin with hydroxyl, 20 parts of silicone oil with hydrogen silicon, such as 1,3,5,7-tetramethylcyclotetrasiloxane, 6 parts of trihexamethylenediamine , and 99 parts of toluene were mixed together, stirred, heated to 60°C, and reacted for 4 hours. At room temperature, 4 parts of acetyltrimethylsilane were added, and the product was obtained after stirring for 1 hour. This product can be used as a release agent for polyurethane soft foam products.

[0064] Its usage steps are:

[0065] In the first step, the mold is heated to a molding temperature of 50°C;

[0066] In the second step, the release agent is evenly sprayed on the mold, and kept for 2 minutes, the solvent evaporates, and the release agent forms a film on the inner surface of the mold;

[0067] The third step is to add raw materials for preparing polyurethane moldings to the mold, and close the mold;

[0068] The fourth step, after curing, open the mold ...

Embodiment 2

[0071] A release agent, consisting of 0.1 part of spherical particle silicone resin with hydroxyl group, 0.1 part of silicone oil with hydrogen silicon, such as polydimethylsiloxane whose two ends are terminated with two methylhydrogensiloxy groups, 0.001 part of 1 -Methyl-4-dimethylaminohexylpiperazine and 40 parts of n-hexane were mixed together, stirred, heated to 60° C., and reacted for 4 hours to obtain the product. This product can be used as a release agent for polyurethane soft foam products,

[0072] Its usage steps are:

[0073] In the first step, the mold is heated to a molding temperature of 70°C;

[0074] In the second step, the release agent is evenly sprayed on the mold, and kept for 1 minute, the solvent evaporates, and the release agent forms a film on the inner surface of the mold;

[0075] The third step is to add raw materials for preparing polyurethane moldings to the mold, and close the mold;

[0076] The fourth step, after curing, open the mold and ta...

Embodiment 3

[0079] A kind of mold release agent, by 0.2 part of silicone resin with hydroxyl, 0.3 part of silicone oil with hydrogen silicon, such as first grade hydrogen siloxane copolymer, 0.005 part of diethylethanolamine, 45 parts of xylene mixed together, stirring, After heating to 60°C and reacting for 4 hours, add 0.005 parts of phenyltris(dimethylsiloxane)silane at room temperature and continue stirring for 1 hour to obtain the product. This product can be used as a release agent for polyurethane soft foam products,

[0080] Its usage steps are:

[0081] In the first step, the mold is heated to a molding temperature of 45°C;

[0082] In the second step, the release agent is evenly sprayed on the mold, and kept for 1 minute, the solvent evaporates, and the release agent forms a film on the inner surface of the mold;

[0083] The third step is to add raw materials for preparing polyurethane moldings to the mold, and close the mold;

[0084] The fourth step, after curing, open the...

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Abstract

The invention relates to a mould release agent and a preparation method thereof and the application of the mould release agent in the preparation of a polyurethane mould product. According to the formula, the mould release agent comprises the following components: a) polysiloxane with a hydroxyl functional group, b) polysiloxane with a hydrogen silane functional group, c) an organic solvent, and d) a catalyst. The preparation method comprises the following steps of: adding the substance a), the substance b) and the substance d) into the substance c); and reacting by heating or at normal temperature for a certain period of time to obtain a finished mould release agent, wherein one or more kinds of catalysts d) can be added into the reaction simultaneously or step by step, and the finished mould release agent is used for preparing the polyurethane mould product. After the mould release agent is sprayed every time, effective mould release is performed for more than 20 times and even can be performed for 100 times without the cleaning of a mould, so that the mould release agent can be used repeatedly; mould release performance is not reduced along with the increase of the mould release frequency; and the surface skin structure of the polyurethane mould product can be controlled, so that the product has high surface quality.

Description

technical field [0001] The present invention relates to a release agent, a process for the preparation of the release agent and the use of the release agent in the preparation of polyurethane moldings. Background technique [0002] Generally, when preparing molded products, most of them will use a release agent to prevent the product from sticking to the mold. This is because the production of these products is usually carried out at high temperature. Due to the heat of the mold, it is particularly easy to stick to the workpiece and not easy to detach. . This not only destroys the product, shortens the service life of the mold, but also increases labor intensity and reduces production efficiency. The use of the release agent can effectively prevent the adhesion of the product and the mold, so that the product can be easily removed from the mold. [0003] Polyurethane is a special polymer synthetic material with unique properties and wide application. It has developed rapid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/64B29K75/00
Inventor 毕建光
Owner 毕建光
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