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Application and preparation method of powdered styrene butadiene rubber friction material

A technology for powdered styrene-butadiene rubber and friction materials, which is applied in friction linings, mechanical equipment, gear transmission mechanisms, etc., can solve problems such as breakage, and achieve the effects of improved tensile strength, easy powderization, and high powder yield.

Inactive Publication Date: 2022-05-13
任丘市华创新型防水材料有限公司
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  • Claims
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides the application and preparation method of a powdered styrene-butadiene rubber friction material, which has the advantages of high powder forming rate and good tensile strength, and solves the problem of easy partial damage when subjected to high-speed friction The problem

Method used

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Embodiment 1

[0022] Preparation method of powder styrene-butadiene rubber friction material, including the following raw materials: styrene-butadiene latex (SBR), kaolin (MO), polymer resin, aqueous calcium chloride solution, ammonia (NH 4 OH), styrene-butadiene latex (SBR) solids content of 21%, kaolin (MO) selected particle size as MO 1 The polymer resin is a free radical copolymerization product of vinyl monomer, and the concentration of calcium chloride aqueous solution is 5%, ammonia (NH 4 OH) concentration of 25%, kaolin (MO 1 As a reaction filler, polymer resin as a coating agent, and aqueous calcium chloride solution as a flocculant.

[0023] Preparation method of powder styrene-butadiene rubber friction material, comprising the following steps:

[0024] S1: In the polymerization kettle, water and styrene-butadiene latex (SBR) are added sequentially to stir and heat up, and an oxidant is added to crosslink the reaction to obtain a surface cross-linked styrene-butadiene latex, the oxida...

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Abstract

The invention discloses an application and a preparation method of a powdered styrene-butadiene rubber friction material. The preparation method comprises the following steps: sequentially adding water and styrene-butadiene latex into a polymerization kettle, stirring, heating, adding an oxidizing agent, carrying out a cross-linking reaction to obtain surface cross-linked styrene-butadiene latex, dispersing kaolin into ammonia water, adding a surface modifier, heating in a water bath in the stirring process, and carrying out heat preservation to obtain the powdered styrene-butadiene rubber friction material. The preparation method comprises the following steps: adding cross-linked styrene-butadiene latex into a stirred product, premixing in a high-speed stirrer, uniformly mixing, adding a coating agent to form a pulverization system, stirring in a common stirrer at a constant temperature, adding a flocculating agent, and strongly stirring in the high-speed stirrer, so that the pulverization system is subjected to pulverization, coagulation and co-precipitation. According to the application and the preparation method of the powdered styrene-butadiene rubber friction material, the powdered rubber is ideally dispersed in the friction material, the phenomenon of partial damage is not easy to occur when the friction material bears high-speed friction, the powdered rubber is easy to pulverize, the powder forming rate is high, the mechanical property is better, the long-time deformation is obviously reduced, and the tensile strength is also improved.

Description

Technical field [0001] The present invention relates to the technical field of rubber materials, specifically the application and preparation method of a powdered styrene-butadiene rubber friction material. Background [0002] Styrene-butadiene rubber is the abbreviation of styrene-butadiene rubber, which is a polymer elastomer material synthesized by copolymerization reaction with butadiene and styrene as the main monomers, with a molecular weight of 200,000-300,000 yuan, which is a long-chain linear structure. Styrene with annular structure is a hard segment, which plays a role in resistance to flow; butadiene with linear structure is a soft segment, which plays an extended deformation role, PSBR powder styrene-butadiene rubber is based on a new form of styrene-butadiene rubber that cannot be applied in some fields or is very inconvenient to apply. [0003] The mixing process, that is, the raw materials of all friction materials such as powder rubber, resin, fiber, filler and ...

Claims

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Application Information

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IPC IPC(8): C08J3/16C08J3/215C08L9/06C08L57/00C08K9/04C08K3/34F16D69/02
CPCC08J3/16C08J3/126C08J3/215F16D69/02C08J2309/06C08J2457/00C08K9/04C08K3/346F16D2200/0056F16D2200/0082
Inventor 田万江王小伟
Owner 任丘市华创新型防水材料有限公司
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