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Styrene-butadiene-isoprene terpolymer integrated latex and preparation method thereof

A technology of isoprene terpolymer and integrated latex, which is applied in the field of styrene-butadiene-isoprene terpolymer integrated latex and its preparation, can solve human skin allergic reactions and affect popularization and application , Difficulty in degradation, etc.

Inactive Publication Date: 2013-01-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVC products have high strength, low price, and are widely used, but they have problems such as poor air permeability, difficult degradation, and serious environmental pollution. Some countries such as Europe and the United States have begun to eliminate them.
Latex products prepared from natural latex are low in price and good in performance, and are widely used in latex products such as medical, industrial and household gloves, condoms, etc., but due to the presence of casein in natural latex, it is easy to cause human skin allergic reactions
[0003] Synthetic latex mainly includes chloroprene latex, nitrile latex, styrene-butadiene latex and their blends or copolymers. The latex products prepared have no protein and avoid human skin allergic reactions. They have excellent oil and chemical resistance. Among them, chlorine Butadiene latex and nitrile latex products have been industrialized, but the recycling and processing of chloroprene latex products and the pungent smell of nitrile latex products have restricted and affected the wide application of products, and the comprehensive performance of latex products prepared by synthetic latex Still not comparable to natural rubber latex products

Method used

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  • Styrene-butadiene-isoprene terpolymer integrated latex and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 150 parts of water, 1.5 parts of disproportionated potassium abietate, 3.5 parts of sodium stearate, 0.06 parts of potassium hydroxide, 0.50 parts of potassium carbonate, 0.50 parts of tertiary dodecyl mercaptan, and 0.20 parts of potassium persulfate in a 20L polymerization kettle , 0.15 parts of ammonium persulfate, 20 parts of styrene, replaced with nitrogen for 3 times, then added 40 parts of isoprene, 40 parts of butadiene, started stirring, raised the temperature to 65 ° C, reacted for 11.5 hours, cooled and discharged , to end the reaction. The analysis results are as follows: the conversion rate of the monomer is 94.2%; the molecular weight of the terpolymer is 184,000, the particle size of the integrated latex of the terpolymer is 87.4nm, and the gel content is 62.38%; transition temperature T g It is -50.42°C.

Embodiment 2

[0012] The used emulsifying agent of embodiment 2 is disproportionated potassium abietate, and the consumption of disproportionated potassium abietate is 3.5 parts; Initiator is potassium persulfate, and the consumption of potassium persulfate is 0.30 part; Other monomer proportioning, reagent formula and polymerization condition are all with Example 1 is the same. The analysis results are as follows: the monomer conversion rate is 93.5%; the molecular weight of the terpolymer is 206,000, the particle size of the terpolymer integrated latex is 94.6nm, and the gel content is 64.89%; transition temperature T g It is -53.28°C.

Embodiment 3－8

[0014] The monomer ratio and reagent formula of Examples 3-8 are shown in Table 2, other polymerization conditions are the same as in Example 2, the monomer conversion rate is controlled at about 95%, and the molecular weight of terpolymer integrated latex is shown in Table 2 , where the molecular weight of the terpolymer is the number average molecular weight.

[0015] Table 1. Preparation of terpolymer integrated latex under different conditions

[0016]

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Abstract

The invention relates to a styrene-butadiene-isoprene terpolymer integrated latex and a preparation method thereof. The latex is characterized in that: the latex has a number-average molecular weight of 3*104-35*104; based on 100% of a total monomer, the latex comprises 10-65% of combined styrene, 10-70% of butadiene, and 10-70% of isoprene; and the particle size of the latex is 50-200 nm. The latex disclosed herein combines the characteristics of traditional polybutadiene rubber latex, polyisoprene latex, and styrene-butadiene latex, can replace natural latex and polyisoprene latex to be used for preparing high-grade latex products, and can replace traditional polybutadiene rubber latex and butylbenzene latex to prepare high-performance ABS resion by emulsion graft polymerization.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis and preparation, and relates to a class of styrene-butadiene-isoprene terpolymer integrated latex and a preparation method thereof. This latex integrates traditional polybutadiene latex, polybutadiene latex, Polyisoprene latex and butadiene / styrene copolymer latex have the characteristics of one body, not only can replace natural latex and polyisoprene latex to prepare high-grade latex products, but also can replace traditional polybutadiene latex Acrylic latex, styrene-butadiene latex, based on the emulsion grafting method to prepare high-performance ABS resin. Background technique [0002] Latex products, especially disposable latex products, have been widely used in many fields such as medical and health care, national defense, daily life, electronic detection, etc. Among them, the type and quantity of disposable gloves are the most. PVC, natural latex, and synthetic latex c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F212/08C08F2/26C08F2/30C08F2/38
Inventor 李杨申凯华尹国强王玉荣王艳色
Owner DALIAN UNIV OF TECH
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