US5079282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weather-resistant polyacetal resin composition
Assignee: Polyplastics Co Ltd
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Filing: 1989-07-10
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Granted: 1992-01-07
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Expires: 2009-07-10
Abstract
Abstract A polyacetal resin composition is improved in the weather-resistance and comprises: (A) a polyacetal resin, (B) 0.01 to 5% by weight (based on the whole composition) of a weathering (light) stabilizer and (C) 0.01 to 10% by weight (based on the whole composition) of an acrylic oligomer of a polyester type.
Inventors
- 👤 Sadatsugu Okuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:24
CPC Classifications
C; C08; C08L; C08L59/00; C08K; C08K5/00; C08K5/16; C08L67/00; C08L67/06; C08L67/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
A weather-resistant polyacetal resin composition comprising: (A) a polyacetal base resin; (B) between 0.01 to 5% by weight, based on the total weight of the composition, of a weathering stabilizer which is at least one compound selected from the group consisting of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxanilides and hindered amines; and (C) between 0.01 to 10% by weight, based on the total weight of the composition, of an acrylic-terminated polyester oligomer represented by the general formula: A--(M--N).sub.n --M--A wherein A represents a residue of an acrylic acid or a derivative thereof, M represents a dihydric alcohol residue, N represents a dicarboxylic acid residue, and n is an integer between 1 and 100.
Claim 2
Dependent Claim
113 words
A weather-resistant polyacetal resin composition comprising: (A) a polyacetal base resin; (B) between 0.01 to 5% by weight, based on the total weight of the composition, of a weathering stabilizer which is at least one compound selected from the group consisting of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxanilides and hindered amines; and (C) between 0.01 to 10% by weight, based on the total weight of the composition, of an acrylic-terminated polyester oligomer represented by the general formula: A--(M--N).sub.n --M--A wherein A represents a residue of an acrylic acid or a derivative thereof, M represents a dihydric alcohol residue, N represents a dicarboxylic acid residue, and n is an integer between 1 and 100.
Claim 3
Dependent Claim
27 words
A weather-resistant polyacetal resin composition as set forth in claim 1, wherein said acrylic-terminated polyester oligomer exhibits a viscosity of 20000 cP or below at 25° C.
Claim 4
Dependent Claim
107 words
A weather-resistant polyacetal resin composition comprising a polyacetal base resin, and a weather-resistant effective amount of a weather-stabilizing package consisting essentially of: (i) between 0.01 to 5% by weight, based on the total weight of the composition, of a weather stabilizer which is at least one selected from the group consisting of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxanilides and hindered amines; and (ii) between 0.01 to 10% by weight, based on the total weight of the composition, of an oligomer which is an ester of a dihydric or higher alcohol with a dibasic or higher carboxylic acid terminated with a residue of acrylic acid or derivatives thereof.
Claim 5
Dependent Claim
107 words
A weather-resistant polyacetal resin composition comprising a polyacetal base resin, and a weather-resistant effective amount of a weather-stabilizing package consisting essentially of: (i) between 0.01 to 5% by weight, based on the total weight of the composition, of a weather stabilizer which is at least one selected from the group consisting of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxanilides and hindered amines; and (ii) between 0.01 to 10% by weight, based on the total weight of the composition, of an oligomer which is an ester of a dihydric or higher alcohol with a dibasic or higher carboxylic acid terminated with a residue of acrylic acid or derivatives thereof.
Claim 6
Dependent Claim
58 words
A weather-resistant polyacetal resin composition as in claim 3, wherein said oligomer is represented by the general formula: A--(M--N).sub.n --M--A wherein A is a residue of an acrylic acid or a derivative thereof, M is a dihydric or higher alcohol residue, N is a dicarboxylic or higher acid residue, and n is an integer between 1 and 100.
Claim 7
Dependent Claim
25 words
A weather-resistant polyacetal resin composition as in claim 3 or 4, wherein said oligomer exhibits a viscosity of 20000 cP or less at 25° C.
Claim 8
Dependent Claim
18 words
A molded article which consists essentially of the weather-resistant polyacetal resin composition as in claim 3 or 4.
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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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |