Compounds useful as stabilizing agents for rubber vulcanizates

Details Compounds useful as stabilizing agents for rubber vulcanizates Compounds useful as stabilizing agents for rubber vulcanizates

1985-09-13

1987-04-14

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524106, 524170, 524208, 524289, 524223, 524303, 524357, 524393, 548376, 560145, 560152, 560153, 560154, 564154, 568 31, 568 42, 568 43, 568 56, 568477, 568413, 556114, 556131, 556149, C08K 541, C08K 536, C07C14926, C07C14914, C07D40312

Patent

active

046579567

ABSTRACT:
Additives for rubber compositions, giving vulcanizates having improved retention of optimum physical properties, are compounds having the formula R--S--B--S--R where B is an organic bridging group and R is an electron-withdrawing group, for example CN, CCl.sub.3, a radical containing an activated methylene group linked to the sulphur atom or the enolic tautomer of a keto-activated methylene group. Also useful as stabilizing agents are oligomeric analogues of such compounds.

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patent: 4271050 (1981-06-01), Maender
Yoshida: Tetrahedron, 26 (12) 2987-93 (1970).
Chemical Abstracts 33:5825-7, "Polymethylenebisthionylacetic Acid," Erik Larsson.
Chemical Abstracts 39:1586-4, "Complex Compounds Between Ag and Some S-Containing Carboxylic Acid Ions in Aqueous Solution," Erik Larsson.
"Studies on Antitumor Substances IX," Chemical Behaviors of Thiosulfonate Toward Active Methylene Compound, Seigoro Hayashi et al, Chemical & Pharmaceutical Bulletin, vol. 17, No. 3, Mar. 1969.

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