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Rubber mold coating and preparation method thereof

A technology for rubber molds and coatings, applied in the coating and other directions, can solve the problems of surface defects of rubber casting products, affecting the surface wear resistance, etc., and achieve the effects of not easy sulfide deposition, feasible operation, and reasonable steps.

Inactive Publication Date: 2018-03-16
荣成市华诚橡胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deposits will continue to accumulate during the production process and cause defects on the surface of cast rubber products, and even affect their surface wear resistance

Method used

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  • Rubber mold coating and preparation method thereof
  • Rubber mold coating and preparation method thereof
  • Rubber mold coating and preparation method thereof

Examples

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preparation example Construction

[0020] A preparation method of rubber mold coating, which is through the following steps: adding titanium dioxide powder and ferric iron tetroxide to liquid linear polysiloxane and stirring evenly, followed by vacuum degassing, finally adding tributylamine therein and stirring slowly uniform.

[0021] Unless otherwise stated, the liquid linear polysiloxane was purchased from Songda Chemical (Fujian) Co., Ltd., with a viscosity of 150 centipoise. Ferroferric oxide powder is purchased from Jilu Mineral Products Processing Plant, Lingshou County, with a purity of over 99.5% and an average particle size of 10-15 microns. Titanium dioxide powder was purchased from Shuyang Yongsheng Hard Surface Technology Material Co., Ltd., Jiangsu Province, and its average particle size was 5-10 microns.

[0022] Unless otherwise stated, for the step of mixing iron ferric oxide and titanium dioxide powder into liquid linear polysiloxane, the method of adding powder to liquid linear polysiloxane ...

Embodiment 1

[0026] In the present embodiment, a kind of rubber mold coating, it is by the liquid linear polysiloxane of 120 parts by weight, the titanium dioxide powder of 24 parts by weight, the triiron tetroxide powder of 12 parts by weight and the three butyls of 0.3 parts by weight composed of amines.

Embodiment 2

[0028] In this embodiment, a kind of rubber mold coating, it is made of 100 parts by weight of liquid linear polysiloxane, 20 parts by weight of titanium dioxide powder, 25 parts by weight of ferric oxide powder and 0.4 parts by weight of tributyl composed of amines.

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Abstract

The invention discloses a rubber mold coating and a preparation method thereof. The rubber mold coating comprises the following components in parts by weight: 100-150 parts of liquid state polysiloxane, 20-30 parts of titanium dioxide powder, 10-25 parts of ferroferric oxide powder and 0.2-0.4 part of tri-n-butylamine. Due to adoption of the liquid state polysiloxane and the titanium dioxide powder, sulfide deposition is not easily generated on the surface of a mold; due to adoption of the titanium dioxide powder and the tri-n-butylamine, the rubber demolding convenience is improved. The rubber mold coating is prepared by using a special method, so that the coating is prevented from a great number of bubbles, and adverse results in the spraying process are avoided. The preparation method disclosed by the invention is reasonable in step, feasible to operate and easy in on-scale production.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a rubber mold coating and a preparation method thereof. Background technique [0002] Mold fouling is a common phenomenon in the rubber processing industry. A layer of deposits forms on the mold walls during vulcanization and builds up over subsequent production cycles. Zinc sulfide has been found to be the most common reaction by-product causing fouling during vulcanization of the various sulfides (and zinc oxide) contained in polymer rubber compounds. There is no semi-permanent release agent or permanent (metallic) covering that will avoid this deposition. Fouling is initially caused by zinc sulfide (inorganic deposits) adhering to the mould, forming a gray deposit. The low molecular weight components of the mixture attach to the microcrystals of ZnS and cause a second stage of deposition (organic deposition). Oxidation products are formed over time and cause carbon deposi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/61C09D7/63
CPCC09D183/04C08K5/17C08K2003/2241C08K2003/2275
Inventor 由洪林连业学王吉波
Owner 荣成市华诚橡胶有限公司
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