Reference

Aqueous emulsion latex derived rubbery copolymer

Aqueous emulsion latex derived rubbery copolymer. Tazuma, James J.; Zadra, Mario D. (Goodyear Tire and Rubber Co., USA). U.S. US 4017560 12 Apr 1977, 6 pp. Division of U.S. 3,929,737. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08F002-24. NCL: 260888000. APPLICATION: US 74-510332 30 Sep 1974. DOCUMENT TYPE: Patent CA Section: 38 (Elastomers, Including Natural Rubber) SBR rubbers are obtained from latexes prepd. by free radical polymn. in an emulsion contg. 2-6% (based on monomer wt.) of a soap which is the K salt of a maleated ethylene-methyl-branched monoolefin copolymer having softening point 45-100.degree.. Thus, SBR aq. latex was prepd. in conventional manner by polymn. in a soln. contg. a mixt. of 4.5 parts of maleated BF3-catalyzed 2-methyl-2-butene-piperylene copolymer [26813-14-9], hot water, K salt of fatty acids, and KOH, and the rubber was coagulated, washed, and dried to give a sheet which had better building tack than a similar rubber prepd. using a rosin acid soap.

Soap solutions of maleic anhydride-modified resin backbone

Soap solutions of maleic anhydride-modified resin backbone. Tazuma, James J.; Zadra, Mario D. (Goodyear Tire and Rubber Co.Several substances are used for example 26813-14-9 and 58461-98-6 which are their cas registry numbers., USA). U.S. US 4017441 12 Apr 1977, 6 pp. Division of U.S. 3,929,737. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08F002-24. NCL: 260029600PM. APPLICATION: US 74-510332 30 Sep 1974. DOCUMENT TYPE: Patent CA Section: 38 (Elastomers, Including Natural Rubber) Section cross-reference(s): 46 Potassium salts of maleic anhydride (I) [108-31-6] adducts of piperylene-branched alkene copolymer were prepd. and used as emulsifying agents in emulsion free-radical polymn. of vinyl monomers. Thus, 475 g 1:1.2 2-methyl-2-butene-piperylene copolymer [26813-14-9] was treated with 98.1 g I at 175-85.degree. in the presence of (Me3C)2O2, the pressure being reduced to 15-20 mm Hg finally. The acid no. of the product (A) was .apprx.175 and the softening point was 67.degree. (ASTM E-28-58-T). An emulsifying agent soap soln. was prepd. from A 573, hot H2O 2700, K soap of fatty acids 29.6, and KOH 880 g. Then, 4.5 parts of the soln. was used per 100 parts of styrene-butadiene monomer mixt. to give a rubber having better tack than a control rubber prepd. using a rosin acid soap soln. .