Process for producing carboxylic acrylonitrile butadiene rubber latex

A carboxylated nitrile latex and production process technology, applied in the field of polymer chemical material production, can solve the problems of complicated addition of monomers, complex process operation, difficult control of reaction temperature, etc., and achieve low production cost, excellent comprehensive performance, easy to control effects

Inactive Publication Date: 2017-12-15
NINGBO SHUNZE RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the existing in the prior art in the production process of carboxylated nitrile latex use monomer type and the number of times of monomer addition is numerous and diverse, the process is complicated to operate, the reaction temperature is more difficult to control, the problem that the reaction time is long, and proposes A kind of production technology of carboxylated nitrile latex

Method used

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  • Process for producing carboxylic acrylonitrile butadiene rubber latex
  • Process for producing carboxylic acrylonitrile butadiene rubber latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of production technology of carboxylated nitrile latex proposed by the present invention comprises the following steps:

[0026] S1. Weigh the raw materials, including 96 parts of deionized water, 1.8 parts of molecular weight regulator, 0.4 parts of pH buffer and 4.5 parts of emulsifier, add the above raw materials into the polymerization kettle, at a temperature of 42 ° C, at 700 r / min Stir at a high speed for 1.8h, after mixing evenly, vacuumize with nitrogen; wherein the molecular weight regulator is n-dodecyl mercaptan; the pH buffer is potassium hydrogen phthalate and mixed phosphate with a mass ratio of 1.6:1.1:9.6 and distilled water; the emulsifier is sodium dodecylbenzenesulfonate, rosin oil soap, sorbitan trioleate and propylene glycol monostearate with a mass ratio of 2.6:2.5:1.6:3.5 Compounding agent;

[0027] S2. Weigh raw materials, including 48 parts of butadiene, 28 parts of acrylonitrile, 14 parts of acrylic acid monomer and 4.5 parts of unsatu...

Embodiment 2

[0031] A kind of production technology of carboxylated nitrile latex proposed by the present invention comprises the following steps:

[0032] S1. Weigh the raw materials, including 75 parts of deionized water, 1 part of molecular weight modifier, 0.1 part of pH buffer and 3 parts of emulsifier, add the above raw materials into the polymerization kettle, at a temperature of 28 ° C, at 550 r / min Stir at a high speed for 1h, after mixing evenly, vacuumize with nitrogen filling; wherein the molecular weight regulator is n-dodecyl mercaptan; the pH buffering agent is potassium hydrogen phthalate, mixed phosphate and Compounding agent of distilled water; emulsifier is a compounding agent of sodium dodecylbenzenesulfonate, rosin oil soap, sorbitan trioleate and propylene glycol monostearate with a mass ratio of 2.2:1:1.2:2 Dispensing;

[0033] S2. Weigh raw materials, including 38 parts of butadiene, 20 parts of acrylonitrile, 8 parts of acrylic acid monomer and 2 parts of unsatura...

Embodiment 3

[0037] A kind of production technology of carboxylated nitrile latex proposed by the present invention comprises the following steps:

[0038] S1. Weigh the raw materials, including 88 parts of deionized water, 1.5 parts of molecular weight regulator, 0.3 parts of pH buffer and 4 parts of emulsifier, add the above raw materials into the polymerization kettle, at the temperature of 28 ~ 45 ℃, at 650r Stir for 1.5h at a speed of 1 / min, after mixing evenly, vacuumize with nitrogen; wherein the molecular weight regulator is n-dodecyl mercaptan; the pH buffer is potassium hydrogen phthalate with a mass ratio of 1.6:1:8.8, mixing Compounding agent of phosphate and distilled water; emulsifier is sodium dodecylbenzenesulfonate, rosin oil soap, sorbitan trioleate and propylene glycol monostearate with a mass ratio of 2.5:2:1.5:3 ester compounding agent;

[0039] S2. Weigh raw materials, including 44 parts of butadiene, 25 parts of acrylonitrile, 12 parts of acrylic acid monomer and 3....

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Abstract

The invention belongs to the technical field of macromolecule chemical material production, in particular discloses a process for producing carboxylic acrylonitrile butadiene rubber latex, and aims to solve the problems that in the prior art, a rich varieties of monomers are used and the monomers are tediously added for multiple times in the carboxylic acrylonitrile butadiene rubber latex production process, the process operation is complex, the reaction temperature is relatively hard to control and the reaction time is long. The preparation method comprises the following steps: uniformly mixing deionized water, a molecular weight adjusting agent, a pH buffer agent and an emulsifier, introducing nitrogen, and vacuuming; adding butadiene, acrylonitrile, a crylic acid monomer and unsaturated carboxylic acid, and stirring so as to obtain an emulsion; heating the emulsion, adding an initiator and deionized water, and performing a heat-preservation reaction so as to obtain latex; and degassing the latex, adding aids, dispersing uniformly, cooling, and sub-packaging, thereby obtaining the carboxylic acrylonitrile butadiene rubber latex. The process is simple in production process operation, gentle in reaction condition, easy to control, free of phenomenon of temperature runaway and gel, rapid in reaction, high in conversion rate, environmentally friendly and free of pollution in production process, low in production cost and worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of polymer chemical material production, in particular to a production process of carboxylated nitrile latex. Background technique [0002] Carboxylated nitrile latex referred to as XNBRL, milky white liquid, is an anionic polymer emulsion. The molecular weight and particle size distribution of the latex are relatively uniform, oil resistance, solvent resistance, acid and alkali resistance, and can be cross-linked with sulfur and metal oxides. Its stability is better than natural latex and ordinary nitrile latex. Carboxylated nitrile latex is a special latex copolymerized by butadiene, acrylonitrile, and methacrylic acid emulsion. It has excellent oil resistance, solvent resistance, heat resistance, and humidity and heat aging resistance. It also has excellent elasticity and adhesion. Strong, soft to the touch, easy to form film, release film, etc., mainly used in oil-resistant labor gloves, non-woven adhes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/12C08F220/46C08F220/06C08F220/04C08F222/02C08F2/38C08F2/24
CPCC08F236/12C08F220/46C08F220/06C08F220/04C08F222/02C08F2/38C08F2/24
Inventor 张兆庆周挺宇张国良刘同金赵鸿宝胡沛华陈建龙许春雷
Owner NINGBO SHUNZE RUBBER
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