Patent US4309335A successfully refreshed from Google Patents.
US4309335A
Expired / Lapsed
US
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Polyphenylene oxide resin composition stabilizer
Assignee: Adeka Corp
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Filing: 1979-09-17
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Granted: 1982-01-05
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Expires: 1999-09-17
Abstract
Abstract Ortho-substituted phenyl acid phosphite stabilizers for polyphenylene oxide resin compositions have the formula <IMAGE> in which R1 is a t-butyl, t-amyl, cyclohexyl or phenyl group; R2 is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cyclohexyl group, or a phenyl group; R3 is a hydrogen atom or a methyl group; and R4 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an ether-alkyl group having 3 to about 70 carbon atoms and 1 to 30 ether groups, an aryl group having 6 to 18 carbon atoms, a cycloalkyl group having 5 to 14 carbon atoms, an aralkyl, alkaryl, or alkoxyaryl group having 7 to 19 carbon atoms, an ethoxylated aryl or alkaryl group having 8 to 78 carbon atoms and 1 to 30 ether groups, or a cycloalkylaryl group having 11 to 19 carbon atoms.
Inventors
- 👤 Mitsuo Akutsu
- 👤 Yutaka Nakahara
- 👤 Kazumi Kitsukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
169 words
A polyphenylene oxide resin composition having enhanced resistance to deterioration of mechanical properties during thermal aging, comprising a polypenylene oxide resin and a stabilizing amount of orthosubstituted phenyl acid phosphite represented by the formula ##STR9## in which R 1 is a t-butyl, t-amyl, cyclohexyl or phenyl group; R 2 is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cyclohexyl group, or a phenyl group; R 3 is a hydrogen atom or a methyl group; and R 4 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an ether-alkyl group having 3 to about 70 carbon atoms and 1 to 30 ether groups, an aryl group having 6 to 18 carbon atoms, a cycloalkyl group having 5 to 14 carbon atoms, an aralkyl, alkaryl, or alkoxyaryl group having 7 to 19 carbon atoms, an ethoxylated aryl or alkaryl group having 8 to 78 carbon atoms and 1 to 30 ether groups, or a cycloalkylaryl group having 11 to 19 carbon atoms.
Claim 2
Dependent Claim
169 words
A polyphenylene oxide resin composition having enhanced resistance to deterioration of mechanical properties during thermal aging, comprising a polypenylene oxide resin and a stabilizing amount of orthosubstituted phenyl acid phosphite represented by the formula ##STR9## in which R 1 is a t-butyl, t-amyl, cyclohexyl or phenyl group; R 2 is a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a cyclohexyl group, or a phenyl group; R 3 is a hydrogen atom or a methyl group; and R 4 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an ether-alkyl group having 3 to about 70 carbon atoms and 1 to 30 ether groups, an aryl group having 6 to 18 carbon atoms, a cycloalkyl group having 5 to 14 carbon atoms, an aralkyl, alkaryl, or alkoxyaryl group having 7 to 19 carbon atoms, an ethoxylated aryl or alkaryl group having 8 to 78 carbon atoms and 1 to 30 ether groups, or a cycloalkylaryl group having 11 to 19 carbon atoms.
Claim 3
Dependent Claim
30 words
A polyphenylene oxide resin composition according to claim 1 in which the quantity of acid phosphate is 0.01 to 5 parts by weight per 100 parts by weight of resin.
Claim 4
Dependent Claim
24 words
A polyphenylene oxide resin composition according to claim 1 in which in the formula of the acid phosphite R 1 is a t-butyl group.
Claim 5
Dependent Claim
17 words
A polyphenylene oxide resin composition according to claim 3 in which the acid phosphite is bis (2,4-di-t-butylphenyl)phosphite.
Claim 6
Dependent Claim
17 words
A polyphenylene oxide resin composition according to claim 3 in which the acid phosphite is bis (2-t-butyl-4-methylphenyl)phosphite.
Claim 7
Dependent Claim
76 words
A polyphenylene oxide resin composition according to claim 1 in which the polyphenylene oxide is represented by the formula ##STR10## in which R a is a hydrogen atom, or a lower alkyl, alkoxy, phenyl, haloalkyl, or haloalkoxy group; R b , R a and R e are each independently a halogen atom or R a , and R c is an atom of hydrogen or halogen, and n is an integer from 50 to about 200.
Claim 8
Dependent Claim
18 words
A polyphenylene oxide resin composition according to claim 6 in which R a and R e are methyl.
Claim 9
Dependent Claim
17 words
A polyphenylene oxide resin composition according to claim 6 comprising as an additional ingredient a styrene polymer.
Claim 10
Dependent Claim
24 words
A polyphenylene oxide resin composition according to claim 8 in which the proportions of polyphenylene oxide to styrene polymer range from 3:1 to 1:3.
Claim 11
Dependent Claim
17 words
A polyphenylene oxide resin composition according to claim 8 in which the acid phosphite is bis (2,4-di-t-butylphenyl)phosphite.
Claim 12
Dependent Claim
24 words
A polyphenylene oxide resin composition according to claim 1 in which in the formula of the acid phosphite R 4 is a hydrogen atom.
Claim 13
Dependent Claim
17 words
A polyphenylene oxide resin composition according to claim 11 in which the acid phosphite is 2,4-di-t-butylphenyl phosphite.
Claim 14
Dependent Claim
17 words
A polyphenylene oxide resin composition according to claim 11 in which the acid phosphite is 2-t-butyl-4-methylphenyl phosphite.
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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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |