Patent US3928285A successfully refreshed from Google Patents.
US3928285A
Expired / Lapsed
US
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Synergistic organotin borate stabilizer composition and resins containing same
Assignee: Milacron Inc
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Filing: 1975-01-16
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Granted: 1975-12-23
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Expires: 1995-01-16
Abstract
Abstract A synergistic stabilizer composition comprising an organotin borate and an organic thiol is provided. Polyvinyl chloride resin containing the synergistic stabilizer composition exhibits improved resistance to early discoloration during processing.
Inventors
- 👤 Robert George Gough
- 👤 Francis Joseph Buescher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:10
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/56; C08K5/57
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
50 words
A stabilizer composition for stabilizing vinyl halide homopolymers, vinyl halide copolymers and polymer blends containing vinyl halide homopolymers or vinyl halide copolymers against early color formation during processing comprising a synergistic combination of (1) an organotin borate which is a member selected from organotin borates having the following general formulae
Claim 2
Dependent Claim
50 words
A stabilizer composition for stabilizing vinyl halide homopolymers, vinyl halide copolymers and polymer blends containing vinyl halide homopolymers or vinyl halide copolymers against early color formation during processing comprising a synergistic combination of (1) an organotin borate which is a member selected from organotin borates having the following general formulae
Claim 3
Dependent Claim
24 words
The stabilizer composition of claim 1 wherein the organic thiol compound is a member selected from organic thiol compounds having the following general formulae
Claim 4
Dependent Claim
15 words
The stabilizer composition of claim 2 wherein the organotin borate has the following general formula
Claim 5
Dependent Claim
15 words
The stabilizer composition of claim 2 wherein the organotin borate has the following general formula
Claim 6
Dependent Claim
15 words
The stabilizer composition of claim 2 wherein the organotin borate has the following general formula
Claim 7
Dependent Claim
22 words
The stabilizer composition of claim 2 wherein the weight ratio of organotin borate tO organic thiol compound is from 1:4 to 4:1.
Claim 8
Dependent Claim
22 words
The stabilizer composition of claim 6 wherein the weight ratio of organotin borate to organic thiol compound is from 1:1 to 7:3.
Claim 9
Dependent Claim
13 words
The stabilizer composition of claim 6 wherein the organotin borate is 1,3-bis(4,4,6-trimethyl-1,3,2-dioxaborinyl-2-oxy) tetramethyldistannoxane.
Claim 10
Dependent Claim
13 words
The stabilizer composition of claim 6 wherein the organotin borate is 1,3-bis(4,4,6-trimethyl-1,3,2-dioxaborinyl-2-oxy) tetrabutyldistannoxane.
Claim 11
Dependent Claim
82 words
A PLASTIC COMPOSITION HAVING IMPROVED RESISTANCE TO EARLY COLOR FORMATION DURING PROCESSING COMPRISING (1) A VINYL HALIDE HOMOPOLYMER, VINYL HALIDE COPOLYMER OR POLYMER BLEND CONTAINING A VINYL HALIDE HOMOPOLYMER OR A VINYL HALIDE COPOLYMER, (2) AN ORGANIC THIOL COMPOUND HAVING A MOLECULAR WEIGHT PER THIOL GROUP OF FROM 40 TO 400 AND A BOILING POINT OF AT LEAST 180*C AT ONE ATMOSPHERE PRESSURE, AND (3) AN ORGANOTIN BORATE WHICH IS A MEMBER SELECTED FROM THE ORGANOTIN BORATES HAVING THE FOLLOWING GENERAL FORMULAE
Claim 12
Dependent Claim
82 words
A PLASTIC COMPOSITION HAVING IMPROVED RESISTANCE TO EARLY COLOR FORMATION DURING PROCESSING COMPRISING (1) A VINYL HALIDE HOMOPOLYMER, VINYL HALIDE COPOLYMER OR POLYMER BLEND CONTAINING A VINYL HALIDE HOMOPOLYMER OR A VINYL HALIDE COPOLYMER, (2) AN ORGANIC THIOL COMPOUND HAVING A MOLECULAR WEIGHT PER THIOL GROUP OF FROM 40 TO 400 AND A BOILING POINT OF AT LEAST 180*C AT ONE ATMOSPHERE PRESSURE, AND (3) AN ORGANOTIN BORATE WHICH IS A MEMBER SELECTED FROM THE ORGANOTIN BORATES HAVING THE FOLLOWING GENERAL FORMULAE
Claim 13
Dependent Claim
22 words
The plastic composition of claim 10 wherein the organic thiol compound is selected from organic thiol compounds having the following general formulae
Claim 14
Dependent Claim
24 words
The plastic compositions of claim 11 wherein the weight ratio of the organotin borate to the organic thiol compound is from 1:4 to 4:1.
Claim 15
Dependent Claim
51 words
The plastic compositions of claim 11 wherein the combined weight concentration of the organotin borate plus the organic thiol compound is from 0.01 to 5 weight percent based on the weight of the vinyl halide homopolymer, vinyl halide copolymer or polymer blend containing a vinyl halide homopolymer or vinyl halide copolymer.
Claim 16
Dependent Claim
15 words
The plastic compositions of claim 11 wherein the organotin borate has the following general formula
Claim 17
Dependent Claim
15 words
The plastic composition of claim 11 wherein the organotin borate has the following general formula
Claim 18
Dependent Claim
15 words
The plastic compositions of claim 11 wherein the organotin borate has the following general formula
Claim 19
Dependent Claim
13 words
The plastic compositions of claim 11 whrein the organotin borate is 1,3-bis(4,4,6-trimethyl-1,3,2-dioxaborinyl-2-oxy) tetramethyldistannoxane.
Claim 20
Dependent Claim
13 words
The plastic compositions of claim 11 wherein the organotin borate is 1,3-bis(4,4,6-trimethyl-1,3,2-dioxaborinyl-2-oxy) tetrabutyldistannoxane.
Claim 21
Dependent Claim
45 words
The plastic compositions of claim 11 wherein the vinyl halide homopolymer, vinyl halide copolymer or polymer blend containing a vinyl halide homopolymer or vinyl halide copolymer is polyvinyl chloride, a vinyl chloride copolymer or a polymer blend containing polyvinyl chloride or a vinyl chloride copolymer.
Claim 22
Dependent Claim
15 words
The plastic compositions of claim 12 wherein the weight ratio is from 1:1 to 7:3.
Claim 23
Dependent Claim
17 words
The plastic compositions of claim 13 wherein the weight concentration is from 0.5 to 1.0 weight percent.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |