Patent US5296533A successfully refreshed from Google Patents.
US5296533A
Expired / Lapsed
US
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Thermoplastic resin composition having improved resistance to discoloration from sunlight
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1992-10-28
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Granted: 1994-03-22
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Expires: 2012-10-28
Abstract
Abstract A resin composition having improved resistance to discoloration by sunlight comprising (A) a polymer mixture which comprises a polyphenylene ether, a polyamide and optionally a polystyrene and/or an agent to improve the impact resistance, and (B) an inorganic powder whose mean particle size is less than or equql to 5 micrometer, in an amount of more than or equal to 15 parts by weight based on 100 parts by weight of the polyphenylene ether in the polymer mixture (A), which is selected from the group consisting of titanium oxide, mica coated with titanium oxide, barium sulphate, zinc oxide and zinc sulfide.
Inventors
- 👤 Kenji Nagaoka
- 👤 Hiroshi Hagimori
- 👤 Yasurou Suzuki
- 👤 Takashi Sanada
- 👤 Etsuji Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:27
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/02; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/30; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L77/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A resin composition having improved resistance to discoloration by sunlight, comprising (A) a polymer mixture which comprises a polyphenylene ether, a polyamide and optionally a polystyrene and/or an agent to improve impact resistance, and (B) an inorganic powder whose mean particle size is less than or equal to 5 micrometers, in an amount of more than or equal to 15 parts by weight based on 100 parts by weight of the polyphenylene ether in the polymer mixture (A), which is selected from the group consisting of titanium oxide, mica coated with titanium oxide, barium sulphate, zinc oxide and zinc sulfide.
Claim 2
Dependent Claim
100 words
A resin composition having improved resistance to discoloration by sunlight, comprising (A) a polymer mixture which comprises a polyphenylene ether, a polyamide and optionally a polystyrene and/or an agent to improve impact resistance, and (B) an inorganic powder whose mean particle size is less than or equal to 5 micrometers, in an amount of more than or equal to 15 parts by weight based on 100 parts by weight of the polyphenylene ether in the polymer mixture (A), which is selected from the group consisting of titanium oxide, mica coated with titanium oxide, barium sulphate, zinc oxide and zinc sulfide.
Claim 3
Dependent Claim
44 words
A resin composition according to claim 1, wherein the polymer mixture (A) is a polymer mixture wherein the polyphenylene ether resides as a dispersed phase having a mean diameter of less than or equal to 5 micrometer in the polyamide as a continuous phase.
Claim 4
Dependent Claim
55 words
A resin composition according to claim 1 or 2, wherein the polymer mixture (A) comprises from 5 to 50% by weight of a polyphenylene ether, from 40 to 95% by weight of a polyamide, from 0 to 30% by weight of polystyrene and 0 to 30% by weight of an agent to improve impact resistance.
Claim 5
Dependent Claim
15 words
A resin composition according to claim 1, wherein the inorganic powder (B) is titanium oxide.
Claim 6
Dependent Claim
40 words
A resin composition according to claim 1, wherein the amount of an inorganic powder (B) is more than or equal to 20 parts by weight based on 100 parts by weight of the polyphenylene ether in the polymer mixture (A).
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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) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |