Patent EP0191931A2 successfully refreshed from Google Patents.
EP0191931A2
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Rubber composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1985-12-16
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Granted: —
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Expires: 2005-12-16
Abstract
Abstract A rubber composition containing (A) a bismaleimide compound represented by the general formula (1) wherein R is a divalent acyclic aliphatic group, cyclic aliphatic group, aromatic group, or alkyiaromatic group, these groups optionally containing a hetero atom selected from 0, N and S in their chain or side substituent, (B) a sulfenamide compound represented by the general formula (II) wherein R, and R 2 denote independently from each other a hydrogen atom, an acyclic aliphatic group, or cyclic aliphatic group, or R, and R 2 together denote a chain aliphatic group which optionally contains an oxygen atom, provided that R, and R 2 cannot simultaneously denote a hydrogen atom, (C) a dithiophosphoric acid compound represented by the general formula (III) wherein R 3 and R 4 denote each an aliphatic group, and (D) sulfur; or (A) a bismaleimide compound represented by the general formula (I) defined above, (E) an aromatic carboxylic acid anhydride, (F) sulfur and/or a sulfur donor, and (G) vulcanization accelerators.
Inventors
- 👤 Hideo Nagasaki
- 👤 Yasuzi Takemoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 17:34
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08F; C08F291/00; C08F291/02; C08K5/49; C08K5/5398
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
166 words
A rubber composition containing (A) a bismaleimide compound represented by the general formula (I) wherein R is a divalent acyclic aliphatic group, cyclic aliphatic group, aromatic group, or alkylaromatic group, these groups optionally containing a hetero atom selected from O, N and S in their chain or side substituent, (B) a sulfenamide compound represented by the general formula (II) wherein R 1 and R 2 denote independently from each other a hydrogen atom, an acyclic aliphatic group, or cyclic aliphatic group, or R 1 and R 2 together denote a chain aliphatic group which optionally contains an oxygen atom, provided that R 1 and R 2 cannot simultaneously denote a hydrogen atom, (C) a dithiophosphoric acid compound represented by the general formula (III) wherein R 3 and R 4 denote each an aliphatic group, and (D) sulfur; or (A) a bismaleimide compound represented by the general formula (I) defined above, (E) an aromatic carboxylic acid anhydride, (F) sulfur and/or a sulfur donor, and (G) vulcanization accelerators.
Claim 2
Dependent Claim
166 words
A rubber composition containing (A) a bismaleimide compound represented by the general formula (I) wherein R is a divalent acyclic aliphatic group, cyclic aliphatic group, aromatic group, or alkylaromatic group, these groups optionally containing a hetero atom selected from O, N and S in their chain or side substituent, (B) a sulfenamide compound represented by the general formula (II) wherein R 1 and R 2 denote independently from each other a hydrogen atom, an acyclic aliphatic group, or cyclic aliphatic group, or R 1 and R 2 together denote a chain aliphatic group which optionally contains an oxygen atom, provided that R 1 and R 2 cannot simultaneously denote a hydrogen atom, (C) a dithiophosphoric acid compound represented by the general formula (III) wherein R 3 and R 4 denote each an aliphatic group, and (D) sulfur; or (A) a bismaleimide compound represented by the general formula (I) defined above, (E) an aromatic carboxylic acid anhydride, (F) sulfur and/or a sulfur donor, and (G) vulcanization accelerators.
Claim 3
Dependent Claim
26 words
A rubber composition according to claim 1, wherein the bismaleimide compound represented by the general formula (I) is N,N'-ethylenebismaleimide, N,N'-hexamethylenebismaleimide, N,N'-(m-phenylene)bismaleimide, N,N'-(p-phenylene)bismaleimide, N,N'-(p-tolylene)bismaleimide, N,N'-(methylenedi-p-phenylene)bismaleimide, or N,N'-(oxydi-p-phenylene)bismaleimide.
Claim 4
Dependent Claim
25 words
A rubber composition according to claim 1, wherein the sulfenamide compound represented by the general formula (II) is N -cyclohexyl-2-benzothiazylsulfenamide, N -oxydiethylene-2-benzothiazylsulfenamide, N-t-butyl-2-benzothiazylsulfenamide, or N,N-dicyclohexyl-2-benzothiazylsulfenamide.
Claim 5
Dependent Claim
41 words
A rubber composition according to claim 1, wherein the dithiophosphoric acid compound represented by the general formula (III) is diethyldithiophosphoric acid disulfide, diisopropyldithiophosphoric acid disulfide, di-n-propyldithiophosphoric acid disulfide, dibutyldithiophosphoric acid disulfide, dihexyldithiophosphoric acid disulfide, dicyclohexyldithiophosphoric acid disulfide, or dioctyldithiophosphoric acid disulfide.
Claim 6
Dependent Claim
18 words
A rubber composition according to claim 1, wherein the sulfur is powdered sulfur, precipitated sulfur, or insoluble sulfur.
Claim 7
Dependent Claim
21 words
A rubber composition according to claim 1, wherein the aromatic carboxylic acid anhydride is phthalic anhydride, pyromellitic anhydride, or trimellitic anhydride.
Claim 8
Dependent Claim
36 words
A rubber composition according to claim 1, wherein the rubber is at least one member selected from the group consisting of styrene-butadiene rubber, butadiene rubber, isoprene rubber, acrylonitrile-butadiene rubber, chloroprene rubber, ethylene-propylene-diene terpolymer, and isoprene-isobutylene rubber.
Claim 9
Dependent Claim
61 words
A rubber composition according to claim 1 which contains 0.1 to 8 parts by weight of the bismaleimide compound (I), 0.1 to 8 parts by weight of the sulfenamide compound (II), 0.3 to 6 parts by weight of the dithiophosphoric acid compound (III), and 0.1 to 14 parts by weight of sulfur, each based on 100 parts by weight of rubber.
Claim 10
Dependent Claim
64 words
A rubber composition according to claim 1 which contains 0.1 to 8 parts by weight of the bismaleimide compound (I), 0.1 to 4 parts by weight of the aromatic carboxylic acid anhydride, 0.1 to 14 parts by weight of sulfur and/or the sulfur donor and 0.1 to 8 parts by weight of the vulcanization accelerator, each based on 100 parts by weight of rubber.
References Cited (Backward Citations)
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