Patent US4732923A successfully refreshed from Google Patents.
US4732923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butadiene polymer composition
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1986-07-16
•
Granted: 1988-03-22
•
Expires: 2006-07-16
Abstract
Abstract A butadiene polymer composition having incorporated the following stabilizers therein: A phenolic compound (I) of the formula: <IMAGE> wherein R1 represents a C1-C4 alkyl group, and a sulfur-containing compound (II) represented by the general formula, <IMAGE> wherein R2 and R3 independently represent a hydrogen atom or a C1-C6 alkyl group, and R4 represents a C3-C18 alkyl group, wherein the weight ratio of (I) to (II) is 1 to 0.5-10. The butadiene polymer composition of the present invention is quite effective to prevent gel formation caused by heat, especially in the absence of oxygen.
Inventors
- 👤 Takeshi Takata
- 👤 Shinichi Yachigo
- 👤 Yukoh Takahashi
- 👤 Manji Sasaki
- 👤 Taisuke Okita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/134; C08K5/36; C08K5/37; C08K5/378
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
A butadiene polymer composition characterized in that a phenolic compound (I) represented by the general formula, ##STR10## wherein R 1 represents a C 1 -C 4 alkyl group, and a sulfur-containing compound (II) represented by the general formula, ##STR11## wherein R 2 and R 3 independently represent a hydrogen atom or a C 1 -C 6 alkyl group, and R 4 represents a C 3 -C 18 alkyl group, are incorporated in butadiene polymer, the weight ratio of (I) to (II) being 1 to 0.5-10.
Claim 2
Dependent Claim
85 words
A butadiene polymer composition characterized in that a phenolic compound (I) represented by the general formula, ##STR10## wherein R 1 represents a C 1 -C 4 alkyl group, and a sulfur-containing compound (II) represented by the general formula, ##STR11## wherein R 2 and R 3 independently represent a hydrogen atom or a C 1 -C 6 alkyl group, and R 4 represents a C 3 -C 18 alkyl group, are incorporated in butadiene polymer, the weight ratio of (I) to (II) being 1 to 0.5-10.
Claim 3
Dependent Claim
40 words
A butadiene polymer composition as claimed in claim 1 wherein each of R 2 and R 3 is a hydrogen atom or a C 1 -C 3 alkyl group and R 4 is a C 12 -C 18 alkyl group.
Claim 4
Dependent Claim
36 words
A butadiene polymer composition as claimed in claim 1 wherein the total amount of the compounds (I) and (II) is 0.1 to 3 parts by weight based on 100 parts by weight of the butadiene polymer.
Claim 5
Dependent Claim
42 words
A butadiene polymer composition as claimed in claim 1 wherein the butadiene polymer is selected from solution-polymerized polybutadiene rubber (BR), solution-polymerized styrene-butadiene copolymeric rubber (SBR), styrene-butadiene block copolymer (SBS), impact-resistant polystyrene modified with BR, SBR or SBS (HI-PS) and acrylonitrile-butadiene-styrene copolymer (ABS).
References Cited (Backward Citations)
US3984372A
Cited
JPS5884835A
Cited
EP0079806A1
Cited
US4525514A
Cited
JPS58144733A
Cited
JPS5971341A
Cited
US4576734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |