US4041014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-toxic stabilizer for vinyl chloride resins
Assignee: Arkema Inc
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Filing: 1973-07-30
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Granted: 1977-08-09
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Expires: 1993-07-30
Abstract
Abstract Polyvinyl chloride compositions suitable for use as food packaging materials are stabilized against the degradative effects of heat using a mixture of di-n-octyltin-S,S'-bis(isooctyl mercaptoacetate) and an oligomeric form of di-n-octyltin maleate wherein the weight ratio of the two component stabilizers is between 1:3 and 4:1, respectively. The combination of stabilizers imparts a greater degree of stabilization than can be achieved using either component at a concentration equal to that of the mixture, as evidenced by a delay in the appearance of severe discoloration during exposure to temperatures of 250° C. and higher.
Inventors
- 👤 Gerry P. Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:25
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/58
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
221 words
A non-toxic stabilized polyvinyl chloride containing resin composition having desirable odor characteristics consisting essentially of a homopolymer or copolymer of at least one resin selected from the group consisting of polyvinyl chloride, vinyl chloride-vinyl acetate copolymers, vinyl chloride-fumaric acid copolymers, vinyl chloride-maleic acid copolymers, vinyl chloride-propylene copolymers, and vinyl chloride-ethylene copolymers, and containing between 1% and 3%, by weight based on the weight of polymer in said resin composition, of (A) a sulfur-containing stabilizer composition comprising between 94.8% and 98.2% by weight of di(n-octyl)tin S,S'bis(isooctyl mercaptoacetate), between 1.8% and 5% of a total of (1) mono-n-octyltin S,S'S"-tris(isooctyl mercaptoacetate) and (2) tri (n-octyl)tin S-isooctyl mercaptoacetate, up to 1.5% of di(2-ethylhexyl)tin S,S'-bis(isooctyl mercaptoacetate), said sulfur-containing stabilizer composition containing between 15.1% and 16.4% of tin and between 8.1 and 8.9% of sulfur, and (B) a di)n-octyl)tin maleate polymer having the formula [(n--C 8 H 17 ) 2 SnC 4 H 2 O 4 ] x , wherein x is an integer selected from the group consisting of 2, 3, and 4, said maleate polymer having a melting point between about 93° C. and 97° C. and containing between 25.2 and 26.5% of tin; the weight ratio of said mercaptoacetate and said maleate being more than 2 parts by weight of said mercaptoacetate per part of said maleate up to a ratio of about 4:1.
Claim 2
Dependent Claim
221 words
A non-toxic stabilized polyvinyl chloride containing resin composition having desirable odor characteristics consisting essentially of a homopolymer or copolymer of at least one resin selected from the group consisting of polyvinyl chloride, vinyl chloride-vinyl acetate copolymers, vinyl chloride-fumaric acid copolymers, vinyl chloride-maleic acid copolymers, vinyl chloride-propylene copolymers, and vinyl chloride-ethylene copolymers, and containing between 1% and 3%, by weight based on the weight of polymer in said resin composition, of (A) a sulfur-containing stabilizer composition comprising between 94.8% and 98.2% by weight of di(n-octyl)tin S,S'bis(isooctyl mercaptoacetate), between 1.8% and 5% of a total of (1) mono-n-octyltin S,S'S"-tris(isooctyl mercaptoacetate) and (2) tri (n-octyl)tin S-isooctyl mercaptoacetate, up to 1.5% of di(2-ethylhexyl)tin S,S'-bis(isooctyl mercaptoacetate), said sulfur-containing stabilizer composition containing between 15.1% and 16.4% of tin and between 8.1 and 8.9% of sulfur, and (B) a di)n-octyl)tin maleate polymer having the formula [(n--C 8 H 17 ) 2 SnC 4 H 2 O 4 ] x , wherein x is an integer selected from the group consisting of 2, 3, and 4, said maleate polymer having a melting point between about 93° C. and 97° C. and containing between 25.2 and 26.5% of tin; the weight ratio of said mercaptoacetate and said maleate being more than 2 parts by weight of said mercaptoacetate per part of said maleate up to a ratio of about 4:1.
Claim 3
Dependent Claim
39 words
A clear transparent bottle consisting of the stabilized resin of claim 1 wherein said polyvinyl chloride containing resin is a polyvinyl chloride homopolymer, or a vinyl chloride-propylene copolymer with the vinyl chloride being at least 90% of said copolymer.
Claim 4
Dependent Claim
82 words
A stabilizer composition suitable for preparing heat stable polyvinyl chloride homopolymer and copolymer resins useful as a food packaging material consisting of (1) di(n-octyl)tin S,S'-bis(isooctyl mercaptoacetate) and (2) di(n-octyl)tin maleate, of the general formula [(n-C 8 H 17 ) 2 SnC 4 H 2 O 4 ] x , wherein x is an integer between 2 and 4, inclusive, said composition containing more than twice the weight of said mercaptoacetate relative to said maleate up to a weight ratio of about 4:1.
Claim 5
Dependent Claim
82 words
A stabilizer composition suitable for preparing heat stable polyvinyl chloride homopolymer and copolymer resins useful as a food packaging material consisting of (1) di(n-octyl)tin S,S'-bis(isooctyl mercaptoacetate) and (2) di(n-octyl)tin maleate, of the general formula [(n-C 8 H 17 ) 2 SnC 4 H 2 O 4 ] x , wherein x is an integer between 2 and 4, inclusive, said composition containing more than twice the weight of said mercaptoacetate relative to said maleate up to a weight ratio of about 4:1.
Claim 6
Dependent Claim
17 words
The stabilizer composition of claim 3 wherein said ratio of said mercaptoacetate to said maleate is 3:1.
Claim 7
Dependent Claim
127 words
A stabilizer composition suitable for preparing heat-stable polyvinyl chloride homopolymer and copolymer resins useful as a food packaging material consisting of a sulfur-containing composition comprising between 94.8 and 98.2% by weight of di)n-octyl)tin S,S'-bis(isoctyl mercaptoacetate), between 1.8 and 5% of a total of (1) mono-n-octyltin S,S',S"-tris(isooctyl mercaptoacetate) and (2) tri(n-octyl)tin S-isooctyl mercaptoacetate, up to 0.15% of di(2-ethylhexyl)tin S,S'-bis(isooctyl mercaptoacetate), said sulfur-containing composition containing between 15.1 and 16.4% of tin and between 8.1 and 8.9% of sulfur; and a di(n-octyl)tin maleate polymer, said maleate polymer having a melting point between about 93° C. and 97° C. and containing between 25.2 and 26.5% of tin; said stabilizer composition containing more than 2 parts of said sulfur-containing composition per part of said maleate up to a weight ratio of 4:1.
Claim 8
Dependent Claim
127 words
A stabilizer composition suitable for preparing heat-stable polyvinyl chloride homopolymer and copolymer resins useful as a food packaging material consisting of a sulfur-containing composition comprising between 94.8 and 98.2% by weight of di)n-octyl)tin S,S'-bis(isoctyl mercaptoacetate), between 1.8 and 5% of a total of (1) mono-n-octyltin S,S',S"-tris(isooctyl mercaptoacetate) and (2) tri(n-octyl)tin S-isooctyl mercaptoacetate, up to 0.15% of di(2-ethylhexyl)tin S,S'-bis(isooctyl mercaptoacetate), said sulfur-containing composition containing between 15.1 and 16.4% of tin and between 8.1 and 8.9% of sulfur; and a di(n-octyl)tin maleate polymer, said maleate polymer having a melting point between about 93° C. and 97° C. and containing between 25.2 and 26.5% of tin; said stabilizer composition containing more than 2 parts of said sulfur-containing composition per part of said maleate up to a weight ratio of 4:1.
Claim 9
Dependent Claim
11 words
The stabilizer composition of claim 5 wherein said ratio is 3:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |