US4717745A
Expired / Lapsed
US
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Stabilized polyacetal resin compositions
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-04-04
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Granted: 1988-01-05
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Expires: 2006-04-04
Abstract
Abstract Polyacetal resin compositions are stabilized to heat, oxygen and light by incorporation a phenolic type compound represented by the formula <IMAGE> (I)
Inventors
- 👤 Tamaki Ishii
- 👤 Shinichi Yachigo
- 👤 Manji Sasaki
- 👤 Haruki Okamura
- 👤 Masahisa Shionoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
A stabilized polyacetal resin composition which comprises a polyacetal resin and a stabilizing amount of a phenolic type compound represented by the general formula (I), ##STR7## wherein R 1 represents a C 1 -C 3 alkyl group.
Claim 2
Dependent Claim
37 words
A stabilized polyacetal resin composition which comprises a polyacetal resin and a stabilizing amount of a phenolic type compound represented by the general formula (I), ##STR7## wherein R 1 represents a C 1 -C 3 alkyl group.
Claim 3
Dependent Claim
24 words
A compound as claimed in claim 1 wherein the amount of the phenolic type compound is 0.01-10% by weight based on the polyacetal resin.
Claim 4
Dependent Claim
36 words
A stabilized polyacetal resin composition as claimed in claim 1 wherein the composition further contains a hindered piperidine compound in an amount of 0.5 to 5 times by weight based on the phenolic type compound (I).
Claim 5
Dependent Claim
18 words
A composition as claimed in claim 3 wherein the hindered piperidine compound is selected from bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate and poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-s-triazin-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]hexamethylene[(2,2,6,6-tetramethyl-4-piperidyl)imino]].
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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |