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
4 Cites 28 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The emulsion polymerization process does not need to i...
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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.

Application Domain

Male contraceptivesGloves +2

Technology Topic

Synthetic polymerEmulsion +8

Examples

  • Experimental program(8)

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 particle size is 180nm.

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 size is 170nm.

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

PropertyMeasurementUnit
Particle size180.0nm
Particle size170.0nm
Film thickness0.13mm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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