US4677153A
Expired / Lapsed
US
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Method for modifying rubbers
Assignee: Zeon Corp
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Filing: 1986-03-25
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Granted: 1987-06-30
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Expires: 2006-03-25
Abstract
Abstract A method for modifying a rubber having unsaturated bonds, characterized by reacting said rubber with (a) an organic compound (I) having a group represented by the formula --CH═N-- and (b) an organic acid halide (II) having a group represented by the formula --COX (X is a halogen atom), in the place of a Lewis acid.
Inventors
- 👤 Shizuo Kitahara
- 👤 Yoshitsugu Hirokawa
- 👤 Toshihiro Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:11
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A method for modifying a rubber having unsaturated bonds, characterized by reacting said rubber at -20° C. to 100° C. with (a) 0.001 to 30 parts by weight, per 100 parts by weight of the rubber, of an organic compound (I) represented by the formula R--CH═N--R' and (b) 0.01 to 30 parts by weight, per 100 parts by weight of the rubber, of an organic acid halide (II) represented by the formula R"--COX (wherein R, R' and R" are each, independently, aliphatic, alicyclic or aromatic residues and X is a halogen atom), in the presence of 0.01 to 5 moles, per mole of organic acid halide (II), of a Lewis acid.
Claim 2
Independent Claim
111 words
A method for modifying a rubber having unsaturated bonds, characterized by reacting said rubber at -20° C. to 100° C. with (a) 0.001 to 30 parts by weight, per 100 parts by weight of the rubber, of an organic compound (I) represented by the formula R--CH═N--R' and (b) 0.01 to 30 parts by weight, per 100 parts by weight of the rubber, of an organic acid halide (II) represented by the formula R"--COX (wherein R, R' and R" are each, independently, aliphatic, alicyclic or aromatic residues and X is a halogen atom), in the presence of 0.01 to 5 moles, per mole of organic acid halide (II), of a Lewis acid.
Claim 3
Dependent Claim
58 words
A method according to claim 1 wherein the rubber having unsaturated bonds is selected from homopolymer rubbers of a conjugated diene, copolymer rubbers of at least two conjugated dienes, copolymer rubbers of at least one conjugated diene and at least one other monomer, ring-opening polymer rubbers of a cycloolefin, polymer rubbers of a cyclic diene and polyolefin rubbers.
Claim 4
Dependent Claim
18 words
A method according to claim 1 wherein the Lewis acid is a metal halide or a semimetal halide.
Claim 5
Dependent Claim
17 words
A method according to claim 1 wherein the reaction is conducted in the presence of a solvent.
Claim 6
Dependent Claim
13 words
A rubber composition comprising a rubber obtained from claim 1 and carbon black.
Claim 7
Dependent Claim
34 words
A method according to claim 1 wherein the organic compound (I) is selected from the group consisting of benzylidenemethylamine, benzylidenebutylamine, benzylideneaniline, benzylidenecyclohexylamine, propylidenebutylamine, propylideneaniline, cyclohexylidenebutylamine, cyclohexylideneaniline, ethoxylbenzylidenebutylaniline, 4-carboxylbenzylidenebutylaniline, 4-carbomethoxybenzylidenebutylamine, 4-carbomethoxybenzylidenebutylamine, benzylidene-4-cyanoaniline, benzylidene-4-carboxylaniline and dimethylaminobenzylidenebutylaniline.
Claim 8
Dependent Claim
34 words
A method according to claim 1 wherein the organic acid halide (II) is selected from the group consisting of acetyl chloride, acetyl bromide, benzoyl chloride, benzoyl bromide, carbomethoxybenzoyl chloride, oxalyl chloride and terephthalic chloride.
Claim 9
Dependent Claim
40 words
A method according to claim 1 wherein the organic compound (I) and the organic acid halide (II) are reacted with the rubber in amounts of from 0.1 to 10 parts by weight, per 100 parts by weight of the rubber.
Claim 10
Dependent Claim
29 words
A method according to claim 1 wherein the Lewis acid is present in an amount of from 0.05 to 2 moles per mole of the organic acid halide (II).
Claim 11
Dependent Claim
23 words
A method according to claim 4 wherein the solvent is an aromatic hydrocarbon solvent, a paraffinic hydrocarbon solvent, or a halogenated hydrocarbon solvent.
Claim 12
Dependent Claim
11 words
A rubber composition according to claim 5 in the unvulcanized state.
Claim 13
Dependent Claim
11 words
A rubber composition according to claim 5 in the vulcanized state.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |