US4619957A
Expired / Lapsed
US
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Benzoate-stabilized rigid polyvinyl chloride compositions
Assignee: BASF Corp
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Filing: 1985-08-09
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Granted: 1986-10-28
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Expires: 2005-08-09
Abstract
Abstract Rigid polyvinyl chloride containing reduced amounts of titanium dioxide and a tin mercaptide thermal stabilizer, said polyvinyl chloride being stabilized against the adverse effects of ultraviolet radiation by the addition thereto of effective amounts of benzoate compounds.
Inventors
- 👤 William J. Reid
- 👤 Jean M. Zappia
- 👤 Gerald A. Capocci
- 👤 John d. Spivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:39
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/58; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
A rigid polyvinyl chloride composition comprising, in addition to said polyvinyl chloride, 2 to 8% titanium dioxide, by weight of the polyvinyl chloride, an effective thermal stabilizing amount of a tin mercaptide and an effective amount for the purpose of ultraviolet light stabilization of a benzoate compound of the formula ##STR2## wherein R is alkyl; R 1 is alkylenetriyl, alkylenetetrayl, alkylenepentayl and alkylenehexayl; and n is 3-6.
Claim 2
Dependent Claim
67 words
A rigid polyvinyl chloride composition comprising, in addition to said polyvinyl chloride, 2 to 8% titanium dioxide, by weight of the polyvinyl chloride, an effective thermal stabilizing amount of a tin mercaptide and an effective amount for the purpose of ultraviolet light stabilization of a benzoate compound of the formula ##STR2## wherein R is alkyl; R 1 is alkylenetriyl, alkylenetetrayl, alkylenepentayl and alkylenehexayl; and n is 3-6.
Claim 3
Dependent Claim
21 words
The composition of claim 1, wherein both R groups are tertiary butyl and are in ortho position to the hydroxyl group.
Claim 4
Dependent Claim
19 words
The composition of claim 1, wherein R 1 contains 3-20 carbon atoms and has a valence equal to n.
Claim 5
Dependent Claim
10 words
The composition of claim 1, wherein said benzoate is trimethylolethane-tris(3,5-di-t.butyl-4-hydroxybenzoate.
Claim 6
Dependent Claim
10 words
The composition of claim 1, wherein said benzoate is glycerol-tris(3,5-di-t.butyl-4-hydroxybenzoate).
Claim 7
Dependent Claim
10 words
The composition of claim 1, wherein said benzoate is pentaerythritol-tetrakis(3,5-di-t.butyl-4-hydroxybenzoate).
Claim 8
Dependent Claim
10 words
The composition of claim 1, wherein said benzoate is d,l-mannitol-hexakis(3,5-di-t.butyl-4-hydroxybenzoate).
Claim 9
Dependent Claim
10 words
The composition of claim 1, wherein said benzoate is sorbitol-hexakis(3,5-di-t.butyl-4-hydroxybenzoate).
Claim 10
Dependent Claim
17 words
The composition of claim 1 which contains 0.2 to 4.0% of benzoate, by weight of polyvinyl chloride.
Claim 11
Dependent Claim
50 words
The composition of claim 1 which additionally contains a benzotriazole, a hindered phenol or mixtures thereof; said benzotriazole replacing a maximum of 50% of said benzoate and said phenol replacing a maximum of 25% of said phenol with the total replacement by both additives not exceeding 50% of said benzoate.
References Cited (Backward Citations)
US3112338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |