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

[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.

[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.

[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.