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Production of high-performance polyisoprene water latex, its gloves and related products

A polyisoprene water-based, polyisoprene technology, used in gloves, adhesives, male contraceptives, etc., to achieve the effects of stable emulsion, high polymerization efficiency and high conversion rate

Active Publication Date: 2007-09-05
SHANGHAI SHENGDA ENTERPRISE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsion polymerization process does not need to introduce organic solvents or other unsaturated monomers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] This example illustrates the preparation of an aqueous polyisoprene latex using the ingredients in Table 1.

[0021] components

[0022] After passing nitrogen to the bottom of the polymerization tank for 15 minutes, add 10 parts of IP and BPO, 3 / 4 combined compound emulsifier, 1 / 8 FeSO 4 , all sodium pyrophosphate, EDTA, carving white powder, NaHCO 3 And an appropriate amount of deionized water, control the reaction temperature at 28° C. to 32° C., and react for 30 minutes. After the blue light appears, add the remaining IP, BPO solution, and the remaining emulsifier and initiator dropwise at the same time within 8-12 hours, and continue to react for 12-20 hours after the dropwise addition to obtain a stable white emulsion. After the polymerization reaction, add 0.2% diethanolamine and 1.0% anti-aging agent 264, and adjust the pH to about 8.0. The temperature was raised to 50° C. to remove residual monomers. Its solid content is 35.0%, pH 5.7, particle siz...

example 2

[0024] Listed in table 1 in each component reference example 1 in the preparation of nitrile latex, only need to change isoprene into 1,3-butadiene, acrylonitrile and methacrylic acid mixed monomer formed by a certain proportion . After blowing nitrogen to the bottom of the polymerization tank for 15 minutes, add 67 parts of 1,3-butadiene, 30 parts of acrylonitrile and 3 parts of methacrylic acid mixed monomer and BPO, combined compound emulsifier, FeSO 4 , sodium pyrophosphate, EDTA, carving white powder, NaHCO 3And deionized water, control the reaction temperature at 35°C-40°C, after the blue light appears, continue to react for 12-20 hours to obtain a stable white emulsion. After the polymerization reaction, add 0.2% diethanolamine and 1.0% anti-aging agent 264, and adjust the pH to about 8.0. The temperature was raised to 50° C. to remove residual monomers. Its solid content is 45.0%, pH 5.7, particle size 170nm.

example 3

[0026] The preparation process of polyisoprene latex is the same as example 1. Take 100 parts of polyisoprene emulsion, add 2.0 parts of sulfur, 1.0 part of zinc oxide, and 1 part of accelerator BZ to it, stir to mix the additives and emulsion evenly, and precure at 40°C to 60°C for 1 hour. After the pre-vulcanized emulsion is matured at 20°C for 24 hours, the calcium nitrate coagulant is used to impregnate the ceramic hand mold, and then dried at 60-150°C to obtain transparent latex gloves with a film thickness of 0.13mm and a breaking strength greater than 14MPa. The elongation rate is greater than 600%, and the film has good hand feeling and strong resilience.

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Abstract

Production of polyisoprene water latex, its gloves and related products is carried out by polymerization reacting for isoprene monomer, emulsifying agent and evocating agent by emulsion free-radical at normal-temperature and pressure or mixing polyisoprene water latex with other synthetic polymer. It has excellent strength and extensibility.

Description

technical field [0001] The invention relates to a preparation method of high-performance polyisoprene water-based latex, gloves and related products, and belongs to the fields of polymer chemistry, polymer physics, colloid chemistry, surface and interface chemistry, rubber physics and chemistry. Background technique [0002] In recent years, synthetic latex has developed rapidly, and its main products are styrene-butadiene latex, neoprene latex, nitrile latex, acrylate latex, etc. Synthetic latex is usually produced by emulsion polymerization, using water as the medium, which represents the development direction of the conversion from solvent-based products to water-based products, and has been widely used in rubber, coatings, adhesives and other fields. [0003] Isoprene is an important unsaturated conjugated diene, which is separated from the carbon five fraction produced in ethylene refining, and is mainly used as a monomer for the synthesis of polyisoprene rubber. Indus...

Claims

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Application Information

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IPC IPC(8): C08L47/00C08K3/06A41D19/00C09D147/00C09J147/00A61F6/04C08L33/08C08L75/04
Inventor 苏宗球
Owner SHANGHAI SHENGDA ENTERPRISE
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