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 i

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] This example shows the process of preparing aqueous polyisoprene latex with the components in Table 1.

[0021] Component

[0022] After blowing nitrogen to the bottom of the polymerization vessel for 15 minutes, add 10 parts of IP and BPO, 3 / 4 combination emulsifier, 1 / 8 FeSO 4 , All sodium pyrophosphate, EDTA, 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, drip the remaining IP, BPO solution, and the remaining emulsifier and initiator simultaneously within 8-12 hours, and continue the reaction for 12-20 hours after the dripping, to obtain a stable white emulsion. After the polymerization reaction is over, add 0.2% of diethanolamine, 1.0% of antioxidant 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 is 5.7, and part...

Example Embodiment

[0023] Example 2

[0024] The components in the preparation of nitrile latex are listed in Table 1 in Reference Example 1. It is only necessary to change the isoprene to a mixed monomer composed of 1,3-butadiene, acrylonitrile and methacrylic acid according to a certain ratio. . After blowing nitrogen to the bottom of the polymerization vessel 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 emulsifier, FeSO 4 , Sodium pyrophosphate, EDTA, white powder, NaHCO 3And deionized water, control the reaction temperature at 35°C-40°C, after the blue light appears, continue the reaction for 12-20 hours to obtain a stable white emulsion. After the polymerization reaction is over, add 0.2% of diethanolamine, 1.0% of antioxidant 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 is 5.7, particle si...

Example Embodiment

[0025] Example 3

[0026] The preparation process of polyisoprene latex is the same as in 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 uniformly, and pre-vulcanize at 40°C to 60°C for 1 hour. After the pre-vulcanized emulsion is cured at 20°C for 24 hours, it is dipped into a ceramic hand mold with a calcium nitrate type coagulant, and then dried at 60-150°C to obtain a transparent latex glove with a film thickness of 0.13mm and a breaking strength greater than 14MPa. The elongation rate is greater than 600%, the film has good hand feeling and strong resilience.

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PUM

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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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