US4808649A
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Beta-ketoester substituted diorganopolysiloxanes and PVC stabilzers comprised thereof
Assignee: Rhodia Chimie SAS
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Filing: 1987-08-12
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Granted: 1989-02-28
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Expires: 2007-08-12
Abstract
Abstract Diorganopolysiloxanes having the formula: ##STR1## are especially useful for the stabilization of polyvinyl chloride-based polymers.
Inventors
- 👤 Michel Gay
- 👤 Edith Canivenc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:56
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
233 words
A diorganopolysiloxane of the formula ##STR13## in which: the symbols R are radicals wherein at least 80% of the number of radicals represented by R are methyl radicals with the remainder being selected from at least one of a C 1 -C 4 alkyl, 3,3,3-trifluoropropyl, vinyl or phenyl radical; the symbols Y, which may be identical or different, are selected from the group of C 1 -C 18 straight chain alkylene radicals, C 1 -C 18 branched chain alkylene radicals, C 1 -C 18 straight chain alkylene radicals with a polyethylene oxide segment, C 1 -C 18 branched chain alkylene radicals with a polyethylene oxide segment, C 1 -C 18 straight chain alkylene radicals with a polypropylene oxide segment and C 1 -C 18 branched chain alkylene radicals with a polypropylene oxide segment; the symbols X, which may be identical or different, are each a Y--OH or Y--OCOR' radical, wherein Y is as defined above and R' is a C 1 -C 18 straight or branched chain alkenyl or alkyl radical; the symbols Z, which may be identical or different, are each a radical R as defined above, a radical ##STR14## wherein Y is as defined above, or OR', wherein R' is as defined above; p is an integer ranging from 1 to 50; q is an integer ranging from 0 to 30; and r is an integer ranging from 0 to 500.
Claim 2
Dependent Claim
233 words
A diorganopolysiloxane of the formula ##STR13## in which: the symbols R are radicals wherein at least 80% of the number of radicals represented by R are methyl radicals with the remainder being selected from at least one of a C 1 -C 4 alkyl, 3,3,3-trifluoropropyl, vinyl or phenyl radical; the symbols Y, which may be identical or different, are selected from the group of C 1 -C 18 straight chain alkylene radicals, C 1 -C 18 branched chain alkylene radicals, C 1 -C 18 straight chain alkylene radicals with a polyethylene oxide segment, C 1 -C 18 branched chain alkylene radicals with a polyethylene oxide segment, C 1 -C 18 straight chain alkylene radicals with a polypropylene oxide segment and C 1 -C 18 branched chain alkylene radicals with a polypropylene oxide segment; the symbols X, which may be identical or different, are each a Y--OH or Y--OCOR' radical, wherein Y is as defined above and R' is a C 1 -C 18 straight or branched chain alkenyl or alkyl radical; the symbols Z, which may be identical or different, are each a radical R as defined above, a radical ##STR14## wherein Y is as defined above, or OR', wherein R' is as defined above; p is an integer ranging from 1 to 50; q is an integer ranging from 0 to 30; and r is an integer ranging from 0 to 500.
Claim 3
Dependent Claim
27 words
The diorganopolysiloxane as defined by claim 1, wherein p ranges from 1 to 16, q ranges from 0 to 8, and r ranges from 2 to 50.
Claim 4
Dependent Claim
39 words
The diorganopolysiloxane as defined by claim 1, wherein R and Z are methyl radicals, Y is --CH 2 ) 3 and X is CH 2 ═CHCOO--CH 2 ) 3 or CH 2 ═C(CH 3 )COO(CH 2 ) 3 .
Claim 5
Dependent Claim
81 words
A process for the preparation of the diorganopolysiloxane as defined by claim 1, comprising reacting diketene with a hydroxylated oil of the formula: ##STR15## in which p, q, R, Y and r are as defined in claim 1, p'=p+q and Z 1 is R or Y--OH, and, where q, as defined in claim 1, is not zero, X is Y--OCOR' in which Y and R' are as defined in claim 1, and X is obtained by esterifying the residual hydroxyalkyl groups.
Claim 6
Dependent Claim
94 words
A stabilized polymer composition of matter, comprising: (a) a vinyl chloride-based polymer; (b) an effective stabilizing amount of at least one organic derivative of zinc; (c) an effective stabilizing amount of at least one organic derivative of a metal from Group IIa of the Periodic Table, or at least one hydrotalcite; and (d) an effective stabilizing amount of at least one diorganopolysiloxane as defined by claim 1, wherein the stabilizing amounts of (b), (c) and (d) at least considerably slow the appearance of yellowing when the composition is heated to 180° C. and above.
Claim 7
Dependent Claim
41 words
The stabilized polymer composition as defined by claim 5, comprising: from 0.005 to 1% by weight of said compound (b); from 0.005 to 5% by weight of said compound (c); and from 0.005 to 5% by weight of said compound (d).
Claim 8
Dependent Claim
13 words
A shaped article comprising the stabilized polymer composition as defined by claim 5.
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) | 1992-02-28 | 1992-08-29 | 1993-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-28 | 1996-08-29 | 1997-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-28 | 2000-08-29 | 2001-02-28 | $7700.00 | Window Closed / Lapsed |