Method for preparing waste carboxylbutyronitrile adhesive powder and PVC mixture

A technology of waste carboxylated nitrile rubber powder and waste carboxylated nitrile rubber, which is applied in the field of preparation of waste carboxylated nitrile rubber powder and PVC blends, can solve the problems of increased elongation at break and decreased tensile strength, and achieves Improved impact strength and elongation at break, low cost, and expanded application range

Inactive Publication Date: 2008-09-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the problems of the existing blends such as increased elongation at break and decreased tensile strength, and provides a method for preparing waste carboxylated nitrile rubber powder and PVC blend with simple processing technology and low production cost

Method used

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  • Method for preparing waste carboxylbutyronitrile adhesive powder and PVC mixture

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Embodiment 1～6

[0019] Put the mixture of plasticizer, heat stabilizer and PVC into a double-roller heat mixer and pre-plasticize at 90°C-120°C for 3-10min, then add initiator, modifier and crushed waste carboxybutylene in sequence Nitrile rubber powder is kneaded at 150°C-170°C for 5-15 minutes, then molded in a 15Mpa flat vulcanizer at 150°C-170°C for 5-15 minutes, and the test piece is quickly moved to a 15Mpa cold press for cooling After reaching room temperature, the mold is demoulded to obtain a waste carboxylated nitrile rubber powder / PVC blend. The component values ​​of the above-mentioned plasticizer, heat stabilizer, PVC, initiator, modifier and waste carboxylated nitrile rubber powder are shown in Table 1. Wherein, plasticizer selects dioctyl phthalate (DOP) for use, heat stabilizer selects tribasic lead sulfate, barium stearate, calcium stearate, lead stearate (their mass ratio is 1:1 : 3: 1), the initiator is dicumyl peroxide (DCP), and the modifier is acrylic acid (AAc).

[00...

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Abstract

The invention discloses a preparation method for waste carboxyl nitrile gelatine powder and PVC blend. The preparation method comprises the following steps that: plasticizer, heat stabilizer and PVC mixture are added in a double-roller feed mill to carry out preplasticizing, and then initiator, modifier and crushed waste carboxyl nitrile gelatine powder are added in turn to carry out milling; then, after stem pressing is completed inside a flat vulcanizing machine, a test block is quickly moved to a chilling press and demoulding is carried out after the test block is cooled down to room temperature, thereby obtaining the waste carboxyl nitrile gelatine powder/PVC blend. The blend not only has substantially increased impact strength and elongation at break, but also has a compact microstructure; moreover, the blend has wide application, simple manufacturing process, low cost and less environmental pollution.

Description

technical field [0001] The invention relates to a preparation method of waste carboxyl nitrile rubber powder and PVC blend. Background technique [0002] my country is a country with rapid development of the rubber industry. In recent years, the consumption of raw rubber has ranked first in the world, and it is also the country with the largest production of waste rubber in the world. A large number of discarded rubber products have caused serious pollution to the environment. If they cannot be disposed of effectively, they will cause serious damage to the environment and waste precious rubber resources. [0003] The ways to process and recycle waste rubber include the production of reclaimed rubber, thermal cracking, and the production of rubber powder. Compared with other methods, the production of rubber powder has been widely used in developed countries, and it has obvious economic and social benefits. Compared with the production of reclaimed rubber, the method is sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L17/00C08K5/10C08K3/24C08K5/098
Inventor 黄承亚申卫生陈志强
Owner SOUTH CHINA UNIV OF TECH
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