Patent US4975478A successfully refreshed from Google Patents.
US4975478A
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Weather-resistant polyacetal resin composition and molded articles therefrom
Assignee: Polyplastics Co Ltd
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Filing: 1989-08-03
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Granted: 1990-12-04
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Expires: 2009-08-03
Abstract
Abstract The weather and UV-light resistance of polyacetal resin compositions is improved by incorporating into polyacetal resin a stabilizing package comprised of at least one stabilizing agent selected from benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxalanilides, and hindered amines, and an acylate resin selected from homopolymers or copolymers of acrylic or methacrylic acid, and ester derivatives thereof.
Inventors
- 👤 Sadatsugu Okuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:29
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/02; B23K37/0211; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; B23K37/0247; B23K9/00; B23K9/095; B23K9/0956; B23K9/10; B23K9/1087; C08L; C08L59/00; C08L33/00; C08L33/04; C08L33/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A weather stabilized polyacetal molding composition comprising a blend of a major amount of a polyacetal resin, and a weather stabilizing effective amount of a stabilizing system which consists essentially of (i) between about 1 to about 40 percent by weight, based upon the total weight of the composition of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxalanilides, and hindered amines, and (ii) between about 3 to about 20 percent by weight, based on the total composition weight, of a homopolymer or copolymer derived from acrylic acid or methacrylic acid, and ester derivatives thereof.
Claim 2
Dependent Claim
92 words
A weather stabilized polyacetal molding composition comprising a blend of a major amount of a polyacetal resin, and a weather stabilizing effective amount of a stabilizing system which consists essentially of (i) between about 1 to about 40 percent by weight, based upon the total weight of the composition of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxalanilides, and hindered amines, and (ii) between about 3 to about 20 percent by weight, based on the total composition weight, of a homopolymer or copolymer derived from acrylic acid or methacrylic acid, and ester derivatives thereof.
Claim 3
Dependent Claim
37 words
A stabilized polyacetal molding composition as in claim 1, wherein said stabilizing system includes as component (ii) a copolymer of acrylic acid or methacrylic acid with at least one comonomer selected from styrene, acrylonitrile, butadiene, and ioprene.
Claim 4
Dependent Claim
21 words
A stabilized polyacetal molding composition as in claim 2, wherein said component (ii) is a homopolymer or copolymer of methyl methacrylate.
Claim 5
Dependent Claim
32 words
A stabilized composition as in claim 1, wherein component (i) is present in an amount between about 0.01 to about 5 percent by weight based upon the total weight of the composition.
Claim 6
Dependent Claim
32 words
A stabilized composition as in claim 1, wherein component (i) is present in an amount between about 0.02 to about 3 percent by weight based upon the total weight of the composition.
Claim 7
Dependent Claim
11 words
Molded articles comprising the molding composition of claim 1 or 2.
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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) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |