Method for preparing unsaturated and conjugated diolefin-nitrile copolymer
A technology of conjugated diene nitrile copolymer and conjugated diene, which is applied in the field of preparation of unsaturated conjugated diene nitrile copolymer, can solve the problems of long vulcanization time of rubber and achieve good processing performance and fast vulcanization speed Effect
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Embodiment 1
[0028] The polymerization reaction was carried out in a 30L autoclave. The addition amount of each monomer additive is calculated per 100 parts of total monomer weight (the same below). At the beginning of the polymerization reaction, add 300 parts of desalted water, 2.0 parts of sodium dodecylbenzenesulfonate soap, 0.005 parts of Diaobai block, 0.001 part of EDTA-Fe, 0.001 part of EDTA-4Na salt, and 30 parts of monomeric acrylonitrile and 0.2 parts of tertiary dodecyl mercaptan and 0.3 parts of 2-mercaptobenzothiazole into the polymerization kettle, after vacuuming, replace with nitrogen three times, then add 70 parts of monomer butadiene, 0.03 parts of oxygen scavenger sodium dithionite, When the temperature of the polymerization tank reached 12°C, 0.06 parts of dicumyl hydroperoxide as an initiator was added to start the polymerization reaction. When the polymerization conversion rate finally reaches 90%, add 0.2 part of terminator hydroxylamine sulfate, stir for half an h...
Embodiment 2
[0030]The polymerization reaction was carried out in a 30L autoclave. At the beginning of the polymerization reaction, add 300 parts of desalted water, 3.0 parts of sodium dodecylbenzenesulfonate soap, 0.005 parts of Diaobai block, 0.001 part of EDTA-Fe, 0.001 part of EDTA-4Na salt, 28 parts of monomer methyl Acrylonitrile, 0.4 parts of 1,1,3,3-tetramethyl-1-butanethiol and 0.2 parts of 2-mercaptobenzothiazole were added to the polymerization kettle, after vacuuming, replaced with nitrogen three times, and then added 72 parts Monomer butadiene, 0.03 parts of oxygen scavenger sodium dithionite, when the temperature of the polymerization kettle reaches 12°C, add 0.08 parts of initiator dicumyl hydroperoxide to start the polymerization reaction, and measure the temperature every 4 hours during the polymerization process. Once the dry matter, when the polymerization conversion rate reaches 30%, add 0.05 part of molecular weight regulator 1,1,3,3-tetramethyl-1-butanethiol and 0.15 ...
Embodiment 3
[0032] The polymerization reaction was carried out in a 30L autoclave. At the beginning of the polymerization reaction, 500 parts of desalted water, 3.0 parts of potassium oleate soap, 0.03 parts of triethanolamine, 32 parts of monomeric acrylonitrile, 0.4 parts of tertiary dodecyl mercaptan and 0.25 parts of tert-butyl-2-benzo Add thiazole sulfenamide into the polymerization kettle, after vacuuming, replace with nitrogen three times, then add 68 parts of monomer 1,3 pentadiene, 0.05 parts of oxygen scavenger sodium dithionite, when the temperature of the polymerization kettle reaches 30°C, Add 0.05 parts of initiator potassium persulfate solution to start the polymerization reaction. Measure the dry matter every 4 hours during the polymerization process. When the polymerization conversion rate reaches 55%, add 0.05 part of tert-dodecyl mercaptan and 0.2 part of tert-butyl-2-benzothiazole sulfenamide, Continue the reaction until the conversion rate finally reaches 90%, add 0....
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