US4724248A
Expired / Lapsed
US
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Voltage stabilizing esters and urethanes
Assignee: BASF Corp
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Filing: 1986-07-02
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Granted: 1988-02-09
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Expires: 2006-07-02
Abstract
Abstract Esters and urethanes of certain polydialkylsiloxanepolyoxyalkylene block and graft copolymers which impart high voltage stabilization to dielectric olefin polymers, the stabilized olefin polymer insulating materials resulting therefrom and electric wire or cable insulated therewith.
Inventors
- 👤 Martin Dexter
- 👤 David H. Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:27
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/42; C08G77/46; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; H01B3/44; H01B3/441; C08K; C08K5/00; C08K5/04; C08K5/14; C08L2203/00; C08L2203/20; C08L2203/202; C08L83/00; C08L83/10; C08L83/12
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
152 words
An ester or urethane derivative of a silicone-glycol corresponding to (I) a block copolymer of the formula ##STR14## wherein a is 2-100; b is 1-100; x is 2-8; d is 2-4; E is ##STR15## T is ##STR16## R 1 is C 1 -C 6 alkyl R is C 4 -C 30 alkyl, phenyl, ##STR17## e is 1-6; X is independently C 1 -C 18 alkyl or C 5 -C 12 cycloalkyl; D is C 1 -C 6 alkylene, phenylene, C 7 -C 9 aralkylene or diphenylene-methane; and R" is C 4 -C 30 alkyl, phenyl, ##STR18## (Ia) a block copolymer of the formula ##STR19## wherein a, b, d, x, R 1 and D are defined as above; (II) a silicon graft polymer of the formula ##STR20## where m is 2-100, n is 1-100, p is 2-4, y is2-4, z is 2-8 and T, R and R 1 are as set forth above.
Claim 2
Dependent Claim
152 words
An ester or urethane derivative of a silicone-glycol corresponding to (I) a block copolymer of the formula ##STR14## wherein a is 2-100; b is 1-100; x is 2-8; d is 2-4; E is ##STR15## T is ##STR16## R 1 is C 1 -C 6 alkyl R is C 4 -C 30 alkyl, phenyl, ##STR17## e is 1-6; X is independently C 1 -C 18 alkyl or C 5 -C 12 cycloalkyl; D is C 1 -C 6 alkylene, phenylene, C 7 -C 9 aralkylene or diphenylene-methane; and R" is C 4 -C 30 alkyl, phenyl, ##STR18## (Ia) a block copolymer of the formula ##STR19## wherein a, b, d, x, R 1 and D are defined as above; (II) a silicon graft polymer of the formula ##STR20## where m is 2-100, n is 1-100, p is 2-4, y is2-4, z is 2-8 and T, R and R 1 are as set forth above.
Claim 3
Dependent Claim
10 words
The block copolymer of formula I according to claim 1.
Claim 4
Dependent Claim
13 words
The copolymer of claim 2, wherein a is 6-24 and b is 8-30.
Claim 5
Dependent Claim
31 words
The copolymer of claim 3, wherein a is 13-17, b is 10-14, x is 3, d is 2, R' is CH 3 and X is branched C 4 -C 8 alkyl.
Claim 6
Dependent Claim
10 words
The block copolymer of formula Ia according to claim 1.
Claim 7
Dependent Claim
13 words
The copolymer of claim 5, wherein a is 6-24 and b is 8-30.
Claim 8
Dependent Claim
24 words
The copolymer of claim 6, wherein a is 13-17, b is 10-14, x is 3, d is 2 and R' is CH 3 .
Claim 9
Dependent Claim
11 words
The silicon graft copolymer of formula II according to claim 1.
Claim 10
Dependent Claim
14 words
The graft polymer of claim 8, wherein m is 3-12 and n is 6-30.
Claim 11
Dependent Claim
37 words
The graft polymer of claim 9, wherein m is 4-8, n is 11-15, p is 3, z is 3, y is 2, R 1 is CH 3 , and X is branched C 4 -C 8 alkyl.
Claim 12
Dependent Claim
10 words
The copolymer of claim 2 corresponding to the formula ##STR21##
Claim 13
Dependent Claim
20 words
A block copolymer corresponding to the formula ##STR22## wherein A, B, a and b are as defined in claim 11.
Claim 14
Dependent Claim
20 words
A block copolymer corresponding to the formula ##STR23## wherein A, B, a and b are as defined in claim 11.
Claim 15
Dependent Claim
11 words
The graft polymer of claim 9 corresponding to the formula ##STR24##
Claim 16
Dependent Claim
19 words
The graft polymer of claim 8 corresponding to the formula ##STR25## wherein m is ˜6 and n is ˜13.
Claim 17
Dependent Claim
19 words
The graft copolymer of claim 10 corresponding to the formula ##STR26## wherein m is ˜6 and n is ˜13.
Claim 18
Dependent Claim
11 words
The block copolymer of claim 5 corresponding to the formula ##STR27##
Claim 19
Dependent Claim
11 words
The block copolymer of claim 2 corresponding to the formula ##STR28##
Claim 20
Dependent Claim
11 words
The block copolymer of claim 2 corresponding to the formula ##STR29##
Claim 21
Dependent Claim
11 words
The block copolymer of claim 2 corresponding to the formula ##STR30##
Claim 22
Dependent Claim
22 words
An electrical insulation composition comprising an olefin polymer and an effective voltage stabilizing amount of a silicone-glycol derivative according to claim 1.
Claim 23
Dependent Claim
20 words
The composition of claim 21, wherein said silicone-glycol derivative is present in a concentration ranging from about 0.1%-5%, by weight.
Claim 24
Dependent Claim
56 words
The composition of claim 21, wherein said olefin polymer is selected from the group consisting of low and high density polyethylene, polypropylene, polybutene, polyisobutylene, copolymers of ethylene and α-olefins, copolymers of ethylene and diene monomers, copolymers of ethylene and vinyl monomers, polyethylene/polyvinyl acetate blend, polyethylene/ethylene-propylene copolymer blend, polyethylene/polyhydroxyethyl acrylate blend and the crosslinked olefin variations thereof.
Claim 25
Dependent Claim
21 words
The composition of claim 23, wherein said olefin polymer is high density polyethylene, low density polyethylene or crosslinked low density polyethylene.
Claim 26
Dependent Claim
15 words
The composition of claim 23 which also contains a sterically hindered phenol or amine antioxidant.
Claim 27
Dependent Claim
13 words
Electric wire or cable insulated with the electrical insulation composition of claim 21.
Claim 28
Dependent Claim
27 words
A method of stabilizing an insulating olefin polymer against electrical failure which comprises incorporating therein an effective stabilizing amount of the silicone-glycol derivative according to claim 1.
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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) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |