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US4636552A
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Novel silicone/polylactone graft copolymer
Assignee: Rhone Poulenc Recherches SA
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Filing: 1985-05-30
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Granted: 1987-01-13
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Expires: 2005-05-30
Abstract
Abstract Novel silicone/polylactone graft copolymers, well suited as polymer composition additives, especially those destined for biomedical applications, have the average general formula: ##STR1## in which p is an integer or decimal ranging from 1.5 to 6, q is an integer or decimal ranging from 0 to 20, A is a divalent hydrocarbon having from 2 to 20 carbon atoms, n is an integer ranging from 3 to 12, m is an integer ranging from 2 to 25, the radicals R', which may be identical or different, are each hydrogen or C 1 -C 4 alkyl, and R is a hydrocarbon having up to 24 carbon atoms.
Inventors
- 👤 Michel Gay
- 👤 Claude Millet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:43
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/445; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/61; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
91 words
Graft copolymers having the average general formula: ##STR7## in which p is an integer or decimal ranging from 1.5 to 6, q is an integer or decimal ranging from 0 to 20, A is a divalent hydrocarbon having from 2 to 20 carbon atoms, n is an integer ranging from 3 to 12, m is an integer ranging from 2 to 25, the radicals R', which may be identical or different, are each hydrogen or C 1 -C 4 alkyl, and R is a hydrocarbon having up to 24 carbon atoms.
Claim 2
Dependent Claim
91 words
Graft copolymers having the average general formula: ##STR7## in which p is an integer or decimal ranging from 1.5 to 6, q is an integer or decimal ranging from 0 to 20, A is a divalent hydrocarbon having from 2 to 20 carbon atoms, n is an integer ranging from 3 to 12, m is an integer ranging from 2 to 25, the radicals R', which may be identical or different, are each hydrogen or C 1 -C 4 alkyl, and R is a hydrocarbon having up to 24 carbon atoms.
Claim 3
Dependent Claim
86 words
The graft copolymers as defined by claim 1, wherein the formula (I) p ranges from 2 to 4, q ranges from 6 to 15, A is --CH 2 ) 4 , --CH 2 ) 5 , --CH 2 ) 6 , ##STR8## n is 3, 4 or 5, m ranges from 4 to 14, R' is hydrogen, and R is straight or branched chain C 2 -C 25 alkyl, or phenylalkyl in which the alkyl moiety is straight or branched chain C 2 -C 20 alkyl.
Claim 4
Dependent Claim
25 words
The graft copolymers as defined by claim 2, wherein the formula (I) n is 5, and R is straight chain C 14 -C 20 alkyl.
Claim 5
Dependent Claim
25 words
The graft copolymers as defined by claim 1, wherein the residue of the methylhydroxypropylsiloxane recurring units are separated by at least one dimethylsiloxane recurring unit.
Claim 6
Dependent Claim
25 words
The graft copolymers as defined by claim 4, wherein the residue of the methylhydroxypropylsiloxane recurring units are separated by at least two dimethylsiloxane recurring units.
Claim 7
Dependent Claim
87 words
A process for the preparation of the graft copolymers as defined by claim 1, comprising reacting one mole of a polylactone having the general formula: ##STR9## with one mole of a diisocyanate of the formula OCN--A--NCO, at a temperature ranging from about 90° to 140° C., and then reacting the resulting product, also at a temperature ranging from about 90° to 140° C., with a polysiloxane having the general formula: ##STR10## in an amount such that said polysiloxane (III) comprises about one equivalent of methylgammahydroxypropylsiloxane recurring units.
Claim 8
Dependent Claim
107 words
A process for the preparation of the graft copolymers as defined by claim 1, comprising (i) reacting one mole of a polylactone having the general formula: ##STR11## with a molar excess of a diisocyanate of the formula OCN--A--NCO, (ii) removing excess diisocyanate upon completion of said reaction (i), (iii) adding a polysiloxane (III) to said step (ii) reaction product, and reacting said polysiloxane (III) therewith, (iv) said polysiloxane (III) being added thereto in an organic solvent medium at a temperature ranging from about 90° to 160° C., in an amount such that it comprises about one equivalent of methylgammahydroxypropylsiloxane recurring units, and having the general formula: ##STR12##
Claim 9
Dependent Claim
10 words
The product of the process as defined by claim 6.
Claim 10
Dependent Claim
10 words
The product of the process as defined by claim 7.
Claim 11
Dependent Claim
40 words
A composition of matter comprising 100 parts by weight of a base polymer, and from about 1 to 70 parts by weight of the graft copolymers as defined by claim 1, said base polymer being compatible with said graft copolymer.
Claim 12
Dependent Claim
41 words
A biocompatible composition of matter comprising a base polymer, and from about 0.1 to 10% by weight, calculated as weight of silicone equivalent, of the graft copolymer as defined by claim 1, said base polymer being compatible with said graft copolymers.
Claim 13
Dependent Claim
19 words
The composition of matter as defined by claim 10, said base polymer comprising homo- or copolymer of vinyl chloride.
Claim 14
Dependent Claim
19 words
The composition of matter as defined by claim 11, said base polymer comprising homo- or copolymer of vinyl chloride.
Claim 15
Dependent Claim
13 words
A shaped article comprising the composition of matter as defined by claim 10.
Claim 16
Dependent Claim
13 words
A shaped article comprising the composition of matter as defined by claim 11.
Claim 17
Dependent Claim
13 words
A shaped article comprising the composition of matter as defined by claim 12.
Claim 18
Dependent Claim
13 words
A blood bag comprising the composition of matter as defined by claim 11.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |