Patent US4555538A successfully refreshed from Google Patents.
US4555538A
Expired / Lapsed
US
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Compositions of polyphenylene ether resin and high impact polystyrene resin having improved ultraviolet light resistance
Assignee: General Electric Co
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Filing: 1983-12-22
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Granted: 1985-11-26
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Expires: 2003-12-22
Abstract
Abstract The ultraviolet light stability of polyphenylene ether resins and blends is improved by the addition of small amounts of ortho-hydroxy-substituted alkoxybenzophenones and tetraalkyl dipiperidinyl aliphatic diesters in combination, as described. Plasticized, flame retardant and mineral filled versions are also disclosed.
Inventors
- 👤 Peter H. Shu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L2201/00; C08L2201/08; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
168 words
A thermoplastic composition, comprising an admixture of (a) a polyphenylene ether resin; and (b) an effective amount of an ultraviolet light stabilizing combination of (1) one or a mixture of two or more compounds having the formula ##STR10## in which R' is hydrogen, alkyl having from 1 to 25 carbon atoms or aryl; each R is, independently, hydrogen, hydroxy, alkoxy having from 1 to about 10 carbon atoms, alkyl having from 1 to about 10 carbon atoms, or aryl; and n and p are independently zero or an integer from 1 to the total number of replaceable hydrogen atoms; and (2) one or a mixture of two or more compounds having the formula ##STR11## in which R" is alkyl, straight or branched, or aryl unsubstituted or substituted, in which (b)(1) is present in an amount from about 0.5 to about 10 parts by weight, and (b)(2) is present in an amount from about 0.05 to about 1 part by weight, per 100 parts of (a) and (b) together.
Claim 2
Dependent Claim
168 words
A thermoplastic composition, comprising an admixture of (a) a polyphenylene ether resin; and (b) an effective amount of an ultraviolet light stabilizing combination of (1) one or a mixture of two or more compounds having the formula ##STR10## in which R' is hydrogen, alkyl having from 1 to 25 carbon atoms or aryl; each R is, independently, hydrogen, hydroxy, alkoxy having from 1 to about 10 carbon atoms, alkyl having from 1 to about 10 carbon atoms, or aryl; and n and p are independently zero or an integer from 1 to the total number of replaceable hydrogen atoms; and (2) one or a mixture of two or more compounds having the formula ##STR11## in which R" is alkyl, straight or branched, or aryl unsubstituted or substituted, in which (b)(1) is present in an amount from about 0.5 to about 10 parts by weight, and (b)(2) is present in an amount from about 0.05 to about 1 part by weight, per 100 parts of (a) and (b) together.
Claim 3
Dependent Claim
67 words
A composition according to claim 1, in which the polyphenylene ether resin is a homopolymer or copolymer having units of the formula ##STR12## in which Q, Q', Q" and Q"' are, independently, selected from the group consisting of hydrogen, halogen, hydrocarbon radicals, halohydrocarbon radicals, hydrocarbonoxy radicals, and halohydrocarbonoxy radicals, and n represents the total number of monomer units and is an integer of at least about 20.
Claim 4
Dependent Claim
15 words
A composition according to claim 1, in which the polyphenylene ether resin is poly(2,6-dimethyl-1,4-phenylene ether).
Claim 5
Dependent Claim
29 words
A composition according to claim 1, in which (b)(1) is present in a major amount and (b)(2) is present in a minor amount, based on the weight of (b).
Claim 6
Dependent Claim
17 words
A composition according to claim 1, in which (b)(1) is 2-hydroxy-4-n-octoxybenzophenone and (b)(2) is 2,2,6,6-tetramethyl dipiperidinyl sebacate.
Claim 7
Dependent Claim
17 words
A composition according to claim 1, in which (b)(1) is 4-dodecyloxy-2-hydroxybenzophenone and (b)(2) is 2,2,6,6-tetramethyl dipiperidinyl sebacate.
Claim 8
Dependent Claim
17 words
A composition according to claim 6, in which (b)(1) is 2,4-dihydroxybenzophenone and (b)(2) is 2,2,6,6-tetramethyl dipiperidinyl sebacate.
Claim 9
Dependent Claim
25 words
A composition according to claim 1, in which (b)(1) comprises a mixture of 2,2'-dihydroxy-4,4'-dimethoxy benzophenone and other tetra-substituted benzophenone, and (b)(2) is 2,2,6,6-tetramethyl dipiperidinyl sebacate.
Claim 10
Dependent Claim
16 words
A composition according to claim 1, which (b)(1) is 4-methoxy-2-hydroxybenzophenone and (b)(2) is 2,2,6,6-tetramethyl dipiperidinyl sebacate.
Claim 11
Dependent Claim
16 words
A composition according to claim 1, which includes (c) a rubber modified high impact poly(alkenyl aromatic)resin.
Claim 12
Dependent Claim
117 words
A composition according to claim 10, in which the alkenyl aromatic resin comprises at least some units of the formula ##STR13## wherein R 1 and R 2 are selected from the group consisting of lower alkyl or alkenyl groups of from 1 to 6 carbon atoms and hydrogen; R 3 and R 4 are selected from the group consisting of chloro, bromo, hydrogen and lower alkyl of from 1 to 6 carbon atoms; R 5 and R 6 are selected from the group consisting of hydrogen and lower alkyl and alkenyl groups of from 1 to 6 carbon atoms, or R 5 and R 6 may be concatenated together with hydrocarbyl groups to from a naphthyl group.
Claim 13
Dependent Claim
14 words
A composition according to claim 11, in which the alkenyl aromatic resin is polystyrene.
Claim 14
Dependent Claim
16 words
A composition according to claim 12, in which the rubber modifier for the polystyrene is polybutadiene.
Claim 15
Dependent Claim
30 words
A composition according to claim 10, in which the weight ratio of polyphenylene ether resin (a) and rubber modified, high impact poly(alkenyl aromatic) resin (c) is between 5:95 and 95:5.
Claim 16
Dependent Claim
21 words
A composition according to claim 1, which includes an effective amount of (c) a plasticizer, with or without an impact modifier.
Claim 17
Dependent Claim
32 words
A composition according to claim 15, in which the plasticizer is present in an amount up to about 30 parts by weight per 100 parts of the polymeric components in the composition.
Claim 18
Dependent Claim
15 words
A composition according to claim 15, in which the plasticizer is an aromatic phosphate compound.
Claim 19
Dependent Claim
14 words
A composition according to claim 17, in which the aromatic phosphate is triphenyl phosphate.
Claim 20
Dependent Claim
13 words
A composition according to claim 18, in which the triphenyl phosphate is isopropylated.
Claim 21
Dependent Claim
12 words
A composition according to claim 15, which includes (d) an impact modifier.
Claim 22
Dependent Claim
31 words
A composition according to claim 20, in which the impact modifier, (d), is a linear block, graft or radial teleblock copolymer or terpolymer of styrene and a diene, hydrogenated or non-hydrogenated.
Claim 23
Dependent Claim
20 words
A composition according to claim 1, 10 or 15, which includes a flame retardant amount of a flame retardant agent.
Claim 24
Dependent Claim
24 words
A composition according to claim 22, in which the flame retardant agent is selected from among organic phosphates, brominated bis-phenoxy alkanes and halogenated polystyrenes.
Claim 25
Dependent Claim
16 words
A composition according to claim 23, in which the flame retardant agent is an aromatic phosphate.
Claim 26
Dependent Claim
15 words
A composition according to claim 24, in which the aromatic phosphate is isopropylated triphenyl phosphate.
Claim 27
Dependent Claim
18 words
A composition according to claim 1, 10, 15 or 22 which includes a mineral filler and/or glass reinforcement.
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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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |