US4663413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane-polylactone block copolymers
Assignee: Evonik Goldschmidt GmbH
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Filing: 1985-01-04
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Granted: 1987-05-05
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Expires: 2005-01-04
Abstract
Abstract Novel linear polysiloxane-polylactone block copolymers are useful as surface modifying additives due in part to their miscibility with a wide variety of base polymers. A particularly preferred polysiloxane-polycaprolactone linear blocked copolymer is miscible with nylon and is useful for forming surface modified nylon products.
Inventors
- 👤 Robert S. Ward
- 👤 Judy S. Riffle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:12
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/445; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4692; C08G18/61; C08G63/00; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
A linear polysiloxane-polylactone block copolymer having the formula: ##STR8## wherein n is an integer from 1 to about 200; R 1 , R 2 , R 3 and R 4 are independently linear or branched alkyl, alkenyl, haloalkyl, or haloalkenyl of 1 to 6 carbon atoms; aryl of 5 to 7 carbon atoms; aralkyl of 6 to 8 carbon atoms; A and A' are independently ##STR9## p is an integer from 0 to 6; m is an integer from 1 to about 250; R 6 is hydrogen or linear or branched alkyl of 1 to 6 carbon atoms; R 5 ' is ##STR10## R 5 is ##STR11## R 7 , R 9 and R 11 are independently --CH 2 ) q , q is an integer from 1 to 20; ##STR12## where r, t and w are independently integers from 1 to 6 and v is an integer from 1 to about 100; R 8 and R 10 are independently hydrogen or alkyl of 1 to 6 carbon atoms.
Claim 2
Dependent Claim
169 words
A linear polysiloxane-polylactone block copolymer having the formula: ##STR8## wherein n is an integer from 1 to about 200; R 1 , R 2 , R 3 and R 4 are independently linear or branched alkyl, alkenyl, haloalkyl, or haloalkenyl of 1 to 6 carbon atoms; aryl of 5 to 7 carbon atoms; aralkyl of 6 to 8 carbon atoms; A and A' are independently ##STR9## p is an integer from 0 to 6; m is an integer from 1 to about 250; R 6 is hydrogen or linear or branched alkyl of 1 to 6 carbon atoms; R 5 ' is ##STR10## R 5 is ##STR11## R 7 , R 9 and R 11 are independently --CH 2 ) q , q is an integer from 1 to 20; ##STR12## where r, t and w are independently integers from 1 to 6 and v is an integer from 1 to about 100; R 8 and R 10 are independently hydrogen or alkyl of 1 to 6 carbon atoms.
Claim 3
Dependent Claim
29 words
A block copolymer according to claim 1 wherein R 5 ' is --R 7 --O--; R 5 is --O--R 7 --; R 7 is --CH 2 ) q .
Claim 4
Dependent Claim
14 words
A block copolymer according to claim 2 wherein R 6 is hydrogen and p=4.
Claim 5
Dependent Claim
33 words
A block copolymer according to claim 1 wherein R 5 ' is --R 7 --NR 8 --; R 5 is --NR 8 --R 7 --; R 7 is --CH 2 ) q .
Claim 6
Dependent Claim
17 words
A block copolymer according to claim 4 wherein R 6 and R 8 are hydrogen and p=4.
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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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |