Patent US4412041A successfully refreshed from Google Patents.
US4412041A
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Process for modifying rubbers employing a compound containing a carboxyl and an aldehyde group
Assignee: Zeon Corp
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Filing: 1983-02-18
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Granted: 1983-10-25
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Expires: 2003-02-18
Abstract
Abstract A process for modifying a rubber, which comprises reacting a rubber having an unsaturated carbon linkage with an organic compound having a carboxyl group and an aldehyde group in the presence of an acid catalyst.
Inventors
- 👤 Shizuo Kitahara
- 👤 Yoshitsugu Hirokawa
- 👤 Haruki Kawada
- 👤 Toshihiro Fujii
- 👤 Nagatoshi Sugi
- 👤 Hiroaki Hasegawa
- 👤 Akira Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:47
CPC Classifications
C; C08; C08C; C08C19/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
35 words
A process for modifying a rubber, which comprises reacting a rubber having an unsaturated carbon linkage with an organic compound having a carboxyl group and an aldehyde group in the presence of an acid catalyst.
Claim 2
Dependent Claim
35 words
A process for modifying a rubber, which comprises reacting a rubber having an unsaturated carbon linkage with an organic compound having a carboxyl group and an aldehyde group in the presence of an acid catalyst.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the rubber having an unsaturated carbon linkage is a rubber derived from a diene.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein the rubber having an unsaturated carbon linkage is an isoprene homopolymer rubber or a copolymer rubber of isoprene with another comonomer.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the organic compound having a carboxyl group and an aldehyde group is an aromatic compound.
Claim 6
Dependent Claim
58 words
The process of claim 1 wherein the organic compound having a carboxyl group and an aldehyde group is an organic compound having an aromatic ring in which the carboxyl group or an atomic grouping containing this group and the aldehyde group or an atomic grouping containing this group are located adjacent to each other on the aromatic ring.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein the organic compound having a carboxyl group and an aldehyde group is 2-formylphenoxyacetic acid.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein the organic compound having a carboxyl group and an aldehyde group is an aliphatic compound.
Claim 9
Dependent Claim
21 words
The process of claim 1 wherein the organic compound having a carboxyl group and an aldehyde group is an alicyclic compound.
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein the acid catalyst is a Lewis acid.
Claim 11
Dependent Claim
17 words
The process of claim 1 wherein the acid catalyst is a halide of a metal or semi-metal.
Claim 12
Dependent Claim
18 words
The process of claim 1 wherein the acid catalyst is a chloride of tin, boron, tungsten or antimony.
Claim 13
Dependent Claim
42 words
The process of claim 1 wherein the organic compound having a carboxyl group and an aldehyde group is used in an amount of 0.01 to 20 parts by weight per 100 parts by weight of the rubber having an unsaturated carbon linkage.
Claim 14
Dependent Claim
33 words
The process of claim 1 wherein the acid catalyst is used in an amount of 0.01 to 5 moles per mole of the organic compound having a carboxyl group and an aldehyde group.
Claim 15
Dependent Claim
17 words
The process of claim 1 wherein the reaction is carried out in the presence of a solvent.
Claim 16
Dependent Claim
19 words
The process of claim 1 wherein the reaction is carried out at a temperature of 0° to 100° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |