Preparing methods ofbutyl cyanide rubber emulsion and butyl cyanide rubber
A technology for valeronitrile rubber and emulsion, which is applied in the field of preparation of valeronitrile rubber emulsion and valeronitrile rubber, and can solve problems such as safety and environmental pollution, large energy consumption, organic solvent removal, and cumbersome recycling process
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example 1
[0041] After passing nitrogen to the bottom of the polymerization tank for 30 minutes, add 100 parts of deionized water, all DRS, EDTA, MF and NaHCO to the reactor according to the components and proportions in Table 1 3 , stirring and dissolving into an aqueous phase. Add IP, AN, and BPO into the monomer tank, stir and dissolve to form an oil phase. 50 parts of deionized water, all FeSO 4 Add the reducing agent to the kettle, stir and dissolve to form an aqueous solution. Control the temperature of the kettle at 25-28°C, start to add the mixed monomers dropwise, and finish dropping in 8-10 hours. Add 80% FeSO synchronously 4 Aqueous solution, drop in 10 to 12 hours. When the conversion reaches 60%, add the remaining 20% FeSO 4 aqueous solution. Continue to react for 5-10 hours, when the conversion rate reaches above 90%, add 0.2 part of diethanolamine and 1 part of antioxidant 264. After the reaction is terminated, the valeronitrile rubber emulsion is sent to a dega...
example 2
[0045] After passing nitrogen to the bottom of the polymerization tank for 30 minutes, add 100 parts of deionized water, all DRS, EDTA, MF and NaHCO 3 , stirring and dissolving into an aqueous phase. Add IP, AN, and CHP into the monomer tank, stir and dissolve to form an oil phase. 50 parts of deionized water, all FeSO 4 Add the reducing agent to the kettle, stir and dissolve to form an aqueous solution. Control the kettle temperature at 8-12°C, start to add the mixed monomers dropwise, and finish dropping in 10-12 hours. Add 70% FeSO synchronously 4 Aqueous solution, drop in 12 to 14 hours. When the conversion reaches 60%, add the remaining 30% FeSO 4 aqueous solution. Continue to react for 10-20 hours, when the conversion rate reaches above 85%, add 0.2 parts of diethanolamine and 1.2 parts of antioxidant D. After the reaction is terminated, the valeronitrile rubber emulsion is sent to a degassing tank, and unreacted monomers are removed by flashing and steaming to o...
example 3
[0049] IP in example 2 is adjusted to 75 parts, AN is 25 parts, emulsifier is adjusted to SBLS by DRS, and material consumption is as table 1, and other technological conditions are unchanged. The obtained valeronitrile rubber emulsion had a solid content of 35.6%, a pH of 7.2, and a particle diameter of 181 nm.
[0050] The physical and mechanical properties of the obtained valeronitrile rubber blocks are shown in Table 2.
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