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Nitrile rubber/polyvinyl chloride coprecipitation gel

A technology of nitrile rubber and polyvinyl chloride, which is applied in the field of rubber modification, can solve problems such as uneven dispersion, unsatisfactory performance, and thermodynamic incompatibility, and achieve the effect of expanding the scope of application and improving scorch performance

Inactive Publication Date: 2013-03-20
TIANJIN KAIXUAN PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, nitrile rubber and polyvinyl chloride have the characteristics of thermodynamic incompatibility in the solid state, so it is difficult to mix the two materials together by high temperature mechanical method, and the dispersion is uneven, the quality of the product is unstable, and the performance cannot meet the requirements. Also the use of existing nitrile rubber and polyvinyl chloride copolymer has been limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of nitrile rubber / polyvinyl chloride co-precipitation gel, its raw material components and weight are:

[0021] NBR emulsion (30% acrylonitrile content, 40% total solid mass fraction) 80kg;

[0022] PVC emulsion 20kg.

[0023] The preparation method step of this nitrile rubber / polyvinyl chloride co-precipitation gel is:

[0024] (1) Blending: At room temperature, put the nitrile rubber emulsion and polyvinyl chloride emulsion into the reaction kettle, mix and stir evenly, and the rotation speed is 20-40 rpm to obtain the mixed emulsion;

[0025] (2) Coagulation: At room temperature, continuously add glacial acetic acid solution with a mass fraction of 5% to the mixed emulsion. After the coagulation is completed, wash, extrude, slice, and dry at 60-140°C to obtain nitrile rubber / polyvinyl chloride copolymer. Shen glue.

Embodiment 2

[0027] A kind of nitrile rubber / polyvinyl chloride co-precipitation gel, its raw material components and weight are:

[0028] NBR emulsion (35% acrylonitrile content, 43% total solid mass fraction) 90kg;

[0029] PVC emulsion 10kg.

[0030] The preparation method is the same as in Example 1, to obtain nitrile rubber / polyvinyl chloride co-precipitation glue.

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PUM

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Abstract

The invention relates to a nitrile rubber / polyvinyl chloride coprecipitation gel, which comprises the following raw material ingredients in part by weight: 80% to 90% of nitrile rubber emulsion and 10% to 20% of polyvinyl chloride emulsion. The nitrile rubber emulsion and the PVC aqueous emulsion are fixed in a synthesis stage to produce the novel nitrile rubber / polyvinyl chloride coprecipitation gel by a special in-situ blend-condensation process, and the nitrile rubber / polyvinyl chloride coprecipitation gel is subjected to mixing to produce a poly-gel which has excellent performances. Therefore, the product has the industrial performances that the conventional nitrile rubber and / or copolymers thereof do not have.

Description

technical field [0001] The invention belongs to the field of rubber modification and relates to in-situ blending and coagulation of emulsions, in particular to a nitrile rubber / polyvinyl chloride co-precipitation gel. Background technique [0002] Nitrile-butadiene rubber (NBR) is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high wear resistance, good heat resistance, and good viscosity. The relay is strong. Its disadvantages are poor low temperature resistance, poor ozone resistance, poor electrical properties, and slightly lower elasticity. Nitrile rubber is mainly used in the manufacture of oil-resistant rubber products. Therefore, in the production process, manufacturers often use substitutes or rubber modifications to solve this problem, especially through the synthesis and modification of nitrile rubber and polyvinyl chloride (PVC), th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L27/06C08J3/16C08C1/14
Inventor 郝永强
Owner TIANJIN KAIXUAN PLASTIC PROD