US3903197A
Expired / Lapsed
US
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Polyacetal composition
Assignee: Asahi Kasei Corp
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Filing: 1974-04-08
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Granted: 1975-09-02
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Expires: 1994-04-08
Abstract
Abstract A polyacetal composition having a good whiteness and an excellent heat stability comprises a polyacetal or copolyacetal; a hindered phenolic antioxidant; a nitrogen-containing compound; and a specified dihydroxydiphenyl or bisphenol.
Inventors
- 👤 Shinichi Ishida
- 👤 Hiromichi Fukuda
- 👤 Tadatoshi Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
138 words
A POLYACETAL COMPOSITION COMPRISING, IN ADMIXTURE, A A POLYACETAL, B 0.001 TO 3 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF POLYACETAL, OF A HINDERED PHENOLIC ANTIOXIDANT IN WHICH AT LEAST ONE HYDROGEN ATOM AT A POSITION ORTHO TO THE PHENOLIC HYDROXYL GROUP IS SUBSTITUTED BY AN ALKYL GROUP, C 0.1 TO 10 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF PLOYACETAL, OF A NITROGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF A. A POLYAMIDE B. A POLYCONDENSATE OF DICARBOXYLIC ACID HYDRAZIDE, OR A SUBSTANCE CAPABLE OF YEILDING DICARBOXYLIC ACID HYDRAZIDE, AND UREA AND AN ALIPHATIC DIAMINE, C. A URACYL, D. AN AMIDINE, E. A CYANOGUANIDINE, F. A POLYURETHANE, G. A POLYUREA, AND H. A POLYAMINOTRIAZOLE, AND D. 0.001 TO 3 PERCENT, BASED ON THE WEIGHT OF POLYACETAL OF 4,4'' -DIHYDROXYDIPHENYL OR A BISHENOL COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
138 words
A POLYACETAL COMPOSITION COMPRISING, IN ADMIXTURE, A A POLYACETAL, B 0.001 TO 3 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF POLYACETAL, OF A HINDERED PHENOLIC ANTIOXIDANT IN WHICH AT LEAST ONE HYDROGEN ATOM AT A POSITION ORTHO TO THE PHENOLIC HYDROXYL GROUP IS SUBSTITUTED BY AN ALKYL GROUP, C 0.1 TO 10 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF PLOYACETAL, OF A NITROGEN-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF A. A POLYAMIDE B. A POLYCONDENSATE OF DICARBOXYLIC ACID HYDRAZIDE, OR A SUBSTANCE CAPABLE OF YEILDING DICARBOXYLIC ACID HYDRAZIDE, AND UREA AND AN ALIPHATIC DIAMINE, C. A URACYL, D. AN AMIDINE, E. A CYANOGUANIDINE, F. A POLYURETHANE, G. A POLYUREA, AND H. A POLYAMINOTRIAZOLE, AND D. 0.001 TO 3 PERCENT, BASED ON THE WEIGHT OF POLYACETAL OF 4,4'' -DIHYDROXYDIPHENYL OR A BISHENOL COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
17 words
A polyacetal composition of claim 1, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 4
Dependent Claim
17 words
A polyacetal composition of claim 1, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 5
Dependent Claim
17 words
A polyacetal composition of claim 1, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 6
Dependent Claim
10 words
A polyacetal composition of claim 4, wherein x is 2.
Claim 7
Dependent Claim
17 words
A polyacetal composition of claim 1, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 8
Dependent Claim
17 words
A polyacetal composition of claim 1, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 9
Dependent Claim
17 words
A polyacetal composition of claim 1, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 10
Dependent Claim
13 words
A polyacetal composition according to claim 1, wherein said bisphenol compound is 4,4''-dihydroxydiphenylmethane.
Claim 11
Dependent Claim
13 words
A polyacetal composition according to claim 1, wherein said bisphenol compound is 4,4''-dihydroxydipphenyl-1,1-ethane.
Claim 12
Dependent Claim
13 words
A polyacetal composition according to claim 1, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-1,1-propane.
Claim 13
Dependent Claim
13 words
A polyacetal composition according to claim 1, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-1,1-butane.
Claim 14
Dependent Claim
13 words
A polyacetal composition according to claim 1, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-1,1-heptane.
Claim 15
Dependent Claim
13 words
A polyacetal composition according to claim 1, wherein said bisphenol compound iS 4,4''-dihydroxydiphenol-2,2-propane.
Claim 16
Dependent Claim
13 words
A polyacetal composition according to claim 1, wherein said bisphenol compound is 4,4''-dihydryoxydiphenol-2-butane.
Claim 17
Dependent Claim
14 words
A polyacetal composition according to claim 1, wherein said nitrogen-containing compound is a polyamide.
Claim 18
Dependent Claim
17 words
A polyacetal composition of claim 16, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 19
Dependent Claim
17 words
A polyacetal composition of claim 16, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 20
Dependent Claim
17 words
A polyacetal composition of claim 16, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 21
Dependent Claim
10 words
A polyacetal composition of claim 19, wherein x is 2.
Claim 22
Dependent Claim
17 words
A polyacetal composition of claim 16, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 23
Dependent Claim
17 words
A polyacetal composition of claim 16, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 24
Dependent Claim
17 words
A polyacetal composition of claim 16, wherein said hindered phenolic antioxidant is a compound of the formula
Claim 25
Dependent Claim
13 words
A polyacetal composition according to claim 16, wherein said bisphenol compound is 4,4''-dihydroxydiphenylmethane.
Claim 26
Dependent Claim
13 words
A polyacetal composition according to claim 16, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-1,1-ethane.
Claim 27
Dependent Claim
14 words
A polyacetal composition according to claim 16, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-1, 1-propane.
Claim 28
Dependent Claim
14 words
A polyacetal composition according to claim 16, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-1, 1-butane.
Claim 29
Dependent Claim
14 words
A polyacetal composition according to claim 16, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-1, 1-heptane.
Claim 30
Dependent Claim
14 words
A polyacetal composition according to claim 16, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-2, 2-propane.
Claim 31
Dependent Claim
14 words
A polyacetal composition according to claim 16, wherein said bisphenol compound is 4,4''-dihydroxydiphenyl-2, 2-butane.
Claim 32
Dependent Claim
22 words
A polyacetal composition of claim 16 wherein said polyamide is a homopolyamide, a polyester amide, a polyamide urea or a polyurethane amide.
References Cited (Backward Citations)
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US3337504A
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US3530091A
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |