Patent US3909492A successfully refreshed from Google Patents.
US3909492A
Expired / Lapsed
US
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Stabilization of vinyl chloride polymers with mixtures of organotin mercaptides and mercaptoesters
Assignee: Arkema Inc
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Filing: 1974-11-22
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Granted: 1975-09-30
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Expires: 1994-11-22
Abstract
Abstract Vinyl chloride polymers are stabilized against the deteriorative effect of heat using a primary stabilizer selected from the group consisting of butyltin-S,S'', S''''-tris(isooctylmercaptoacetate) and butyltin tris(lauryl mercaptide); and an auxiliary stabilizer selected from the group consisting of tributyltin-Sisooctylmercaptoacetate, triphenyltin lauryl mercaptide and triphenyltin thiophenate.
Inventors
- 👤 William A Larkin
- 👤 Jr Robert C Ringwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:26
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/58
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
A halogen-containing polymer composition as described in claim 1 wherein the pair of primary and auxiliary stabilizers is selected from the group consisting of butyltin-S,S'',S''''-tris(isooctyl mercaptoacetate) and triphenyltin lauryl mercaptide; butyltin-S,S'',S''''-tris(isooctyl mercaptoacetate) and triphenyltin thiophenate; butyltin-S,S'',S''''-tris(isooctyl mercaptoacetate) and tributyltin-S-isooctyl mercaptoacetate; and butyltin tris(lauryl mercaptide) and tributyltin-S-isooctyl mercaptoacetate.
Claim 2
Dependent Claim
51 words
The novel stabilized halogen-containing polymer composition of claim 1 wherein said primary stabilizer is present in amounts between about 0.2 and 1.8 parts by weight per 100 parts of halogen-containing polymer and said auxiliary stabilizer is present in amounts between about 0.2 and 1.8 parts per 100 parts of halogen-containing polymer.
Claim 3
Dependent Claim
99 words
A HALOGEN-CONTAINING POLYMER COMPOSITION STABILIZED AGAINST THE DETERORATIVE EFFECT OF HEAT COMPRISING A HALOGENCONTAINING RESIN SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF VINYL CHLORIDE AND VINULIDENE CHLORIDE AND COPOLYMERS OF VINYL CHLORIDE AND VINYLIDENE CHLORIDE WITH OTHER ETHYLENICALLY UNSATURATED MONOMERS AND EFFECTIVE AMOUNTS OF (1) A PRIMARY STABILIZER SELECTED FROM THE GROUP CONSISTING OF MONOBUTYLTIN-S,S'',S"-TRIS-(ISO-OCTYL MERCAPTOACETATE), AND BUTYLYIN TRIS-(LAURYL MERCAPTIDE) AND (2) AN AUXILIARY STABILIZER SELECTED FROM THE GROUP CONSISTING OF TRIBUTYLTIN-S-ISO-OCTYL MERCAPTOACETATE, TRIPHENYLTIN LAURYL MERCAPTIDE, AND TRIPHENYLTIN THIOPHENATE, WITH THE PROVISO THAT THE WEIGHT RATIO OF PRIMARY STABILIZER TO AUXILIARY STABILIZER IS BETWEEN ABOUT 1.2 AND 7:1.
Claim 4
Dependent Claim
59 words
A novel stabilizer composition comprising a primary stabilizer selected from the group consisting of monobutyltin-S, S'',S''''-tris-(iso-octyl mercaptoacetate), butyltin tris-(lauryl mercaptide) and an auxiliary stabilizer selected from the group consisting of tributyltin-S-iso-octyl mercaptoacetate, triphenyltin lauryl mercaptide, and triphenyltin thiophenate, with the proviso that the weight ratio of said primary stabilizer to said auxiliary stabilizer is between about 1:2 and 7:1.
Claim 5
Dependent Claim
48 words
A novel stabilizer composition as described in claim 4 wherein the pair of primary and auxiliary stabilizers is selected from the group consisting of butyltin-S,S'',S''''-tris(isooctyl mercaptoacetate) and triphenyltin lauryl mercaptide; butyltin-S, S'',S''''-tris(isooctyl mercaptoacetate) and triphenyltin thiophenate; butyltin-S,S'',S''''-tris(isooctyl mercaptoacetate) and tributyltin-S-isooctyl mercaptoacetate; and butyltin tris(lauryl mercaptide) and tributyltin-S-isooctyl mercaptoacetate.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |