US3887519A
Expired / Lapsed
US
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Dimethyltin ester stabilizers for vinyl-halide polymers
Assignee: ATK Launch Systems LLC
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Filing: 1974-01-21
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Granted: 1975-06-03
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Expires: 1994-01-21
Abstract
Abstract Dimethyltin derivatives of lower toxicity are prepared by reducing the amount of trimethyltin impurity.
Inventors
- 👤 Lewis B Weisfeld
- 👤 Robert C Witman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/58
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
42 words
A COMPOSITION COMPRISING A HALOGEN CONTAINING RESIN SELECTED FROM THE GROUP CONSISTING OF CHLORINATED POLYETHYLENE A VINYL HALIDE RESIN AND A VINYLIDENE HALIDE RESIN WITH A STABILIZINGLY EFFECTIVE AMOUNT OF A MIXTURE OF (1) 60 TO 96% OD COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
42 words
A COMPOSITION COMPRISING A HALOGEN CONTAINING RESIN SELECTED FROM THE GROUP CONSISTING OF CHLORINATED POLYETHYLENE A VINYL HALIDE RESIN AND A VINYLIDENE HALIDE RESIN WITH A STABILIZINGLY EFFECTIVE AMOUNT OF A MIXTURE OF (1) 60 TO 96% OD COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
43 words
A composition comprising a halogen containing resin selected from the group consisting of chlorinated polyethylene a vinyl halide resin and a vinylidene halide resin with a stabilizingly effective amount of a mixture of (1) 60 to 96% of a compound having the formula
Claim 4
Dependent Claim
43 words
A composition comprising a halogen containing resin selected from the group consisting of chlorinated polyethylene a vinyl halide resin and a vinylidene halide resin with a stabilizingly effective amount of a mixture of (1) 60 to 96% of a compound having the formula
Claim 5
Dependent Claim
21 words
A composition according to claim 1 wherein the stabilizer has an LD50 of at least 695 when administered orally to rats.
Claim 6
Dependent Claim
24 words
A composition according to claim 2 wherein R3 is alkyl, cycloalkyl, alkenyl or benzyl and the LD50 of the stabilizer is at least 1000.
Claim 7
Dependent Claim
25 words
A composition according to claim 3 wherein R3 is alkyl of 4 to 12 carbon atoms and n is an integer of 1 to 2.
Claim 8
Dependent Claim
16 words
A composition according to claim 4 wherein R3 is alkyl of 8 to 12 carbon atoms.
Claim 9
Dependent Claim
19 words
A composition according to claim 4 wherein the amount of trimethyltin compound is not over 0.5% of the stabilizer.
Claim 10
Dependent Claim
19 words
A composition according to claim 6 wherein the amount of trimethyltin compound is not over 0.4% of the stabilizer.
Claim 11
Dependent Claim
23 words
A composition according to claim 3 wherein the stabilizer is present in an amount of 0.1 to 5% by weight of the resin.
Claim 12
Dependent Claim
23 words
A composition according to claim 8 wherein the stabilizer is present in an amount of 0.1 to 2.5% by weight of the resin.
Claim 13
Dependent Claim
23 words
A composition according to claim 1 wherein not over 0.75% of the total tin present calculated as metal is present as trimethyltin compound.
Claim 14
Dependent Claim
35 words
A composition according to claim 1 wherein the stabilizer mixture contains 71 to 81% of (1) and 29 to 19% of (2) and the amount of trimethyltin compound in the stabilizer is not over 0.6%.
Claim 15
Dependent Claim
21 words
A composition according to claim 11 wherein the stabilizer has an LD50 of at least 695 when administered orallY to rats.
Claim 16
Dependent Claim
14 words
A composition according to claim 12 wherein R3 is alkyl, cycloalkyl, alkenyl or benzyl.
Claim 17
Dependent Claim
16 words
A composition according to claim 13 wherein the LD50 of the stabilizer is at least 1000.
Claim 18
Dependent Claim
25 words
A composition according to claim 13 wherein R3 is alkyl of 4 to 12 carbon atoms and n is an integer of 1 to 2.
Claim 19
Dependent Claim
16 words
A composition according to claim 15 wherein R3 is alkyl of 8 to 12 carbon atoms.
Claim 20
Dependent Claim
16 words
A composition according to claim 16 wherein the LD50 of the stabilizer is at least 1000.
Claim 21
Dependent Claim
31 words
A composition according to claim 17 wherein the stabilizer is present in an amount of 0.1 to 2.5% by weight of the resin and the resin is a vinyl chloride resin.
Claim 22
Dependent Claim
19 words
A composition according to claim 15 wherein the amount of trimethyltin compound is not over 0.5% of the stabilizer.
Claim 23
Dependent Claim
19 words
A composition according to claim 19 wherein the amount of trimethyltin compound is not over 0.4% of the stabilizer.
Claim 24
Dependent Claim
23 words
A composition according to claim 13 wherein the stabilizer is present in an amount of 0.1 to 5% by weight of the resin.
Claim 25
Dependent Claim
14 words
A composition according to claim 21 wherein the resin is a vinyl chloride resin.
Claim 26
Dependent Claim
16 words
A composition according to claim 22 wherein the LD50 of the stabilizer is at least 1000.
Claim 27
Dependent Claim
23 words
A composition according to claim 13 wherein the composition contains about 24% of (2), not over 0.6% trimethyltin compound and the balance (1).
Claim 28
Dependent Claim
19 words
A composition according to claim 24 wherein the amount of trimethyltin compound is not over 0.4% of the stabilizer.
Claim 29
Dependent Claim
17 words
A stabilizer composition comprising a mixture of (1) 60 to 96% of a compound having the formula
Claim 30
Dependent Claim
17 words
A stabilizer composition comprising a mixture of (1) 60 to 96% of a compound having the formula
Claim 31
Dependent Claim
18 words
A composition according to claim 26 wherein (1) is 71 to 81% and (2) is 19 to 29%.
Claim 32
Dependent Claim
11 words
A composition according to claim 27 wherein (2) is about 24%.
Claim 33
Dependent Claim
12 words
A composition according to claim 28 wherein (3) is not over 0.4%.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |