US4766181A
Expired / Lapsed
US
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Silicone-modified polyester resin and silicone-sheathed polyester fibers made therefrom
Assignee: General Electric Co
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Filing: 1986-09-18
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Granted: 1988-08-23
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Expires: 2006-09-18
Abstract
Abstract Polyester resin is modified with siloxane block polymers in such a manner so as to form silicone-modified polyester copolymer domains of controlled size and distribution dispersed in the polyester matrix. These domains undergo microphase segregation and migration during the melt spinning and cold-drawing to the surface of the polyester fiber being formed so as to provide a silicone-sheathed polyester fiber.
Inventors
- 👤 Robert L. Ostrozynski
- 👤 George H. Greene
- 👤 James H. Merrifield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:19
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08G; C08G77/00; C08G77/42; C08G77/445; C08L83/00; C08L83/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2962; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
199 words
A silicone-sheathed polyester fiber comprising a polyester matrix sheathed within a silicone-modified polyester matrix, said silicone modified polyester matrix comprising the reaction product of an aromatic dicarboxylic acid or its diester, a diol and a siloxane-block copolymer of the general formula: ##STR94## wherein R is individually a monovalent group selected from the group consisting of alkyl, aryl, acyl, aralkyl and polyoxyalkylene group; R' is individually a monovalent group selected from the group consisting of alkyl, aryl, alkenyl and aralkyl groups containing from 1 to 8 carbon atoms; Z is a substituted or unsubstituted group selected from the group consisting of alkyl, aryl, aralkyl, alkoxy, polyoxyalkyl, alkenyl and siloxy, with the proviso that when Z is siloxy x must equal zero; a has a value of 0 to 10; b has a value of 0 to 50,000 c has a value of 0 to 1,000 and the sum of a+b+c is such that the polysiloxane block polymer contains at least 10 silicon atoms; x has a value of 0, 1, 2, or 3, and wherein prior to the reaction said silicone block copolymer is present within the polyester matrix in microdomains ranging in size from about 0.05 to 6 microns.
Claim 2
Dependent Claim
199 words
A silicone-sheathed polyester fiber comprising a polyester matrix sheathed within a silicone-modified polyester matrix, said silicone modified polyester matrix comprising the reaction product of an aromatic dicarboxylic acid or its diester, a diol and a siloxane-block copolymer of the general formula: ##STR94## wherein R is individually a monovalent group selected from the group consisting of alkyl, aryl, acyl, aralkyl and polyoxyalkylene group; R' is individually a monovalent group selected from the group consisting of alkyl, aryl, alkenyl and aralkyl groups containing from 1 to 8 carbon atoms; Z is a substituted or unsubstituted group selected from the group consisting of alkyl, aryl, aralkyl, alkoxy, polyoxyalkyl, alkenyl and siloxy, with the proviso that when Z is siloxy x must equal zero; a has a value of 0 to 10; b has a value of 0 to 50,000 c has a value of 0 to 1,000 and the sum of a+b+c is such that the polysiloxane block polymer contains at least 10 silicon atoms; x has a value of 0, 1, 2, or 3, and wherein prior to the reaction said silicone block copolymer is present within the polyester matrix in microdomains ranging in size from about 0.05 to 6 microns.
Claim 3
Dependent Claim
25 words
The fiber of claim 1 wherein the aromatic dicarboxylic acid is selected from the group of aromatic dicarboxylic acids having 8 to 15 carbon atoms.
Claim 4
Dependent Claim
36 words
The fiber of claim 1 wherein the diester of an aromatic dicarboxylic acid is selected from the group of C 1 to C 4 dialkyl esters of aromatic dicarboxylic acids having 8 to 15 carbon atoms.
Claim 5
Dependent Claim
13 words
The fiber of claim 3 wherein the aromatic dicarboxylic acid is terephthalic acid.
Claim 6
Dependent Claim
15 words
The fiber of claim 3 wherein the diester of an aromatic dicarboxylic acid is dimethylterephthalate.
Claim 7
Dependent Claim
15 words
The fiber of claim 1 wherein the diol has from 2 to 20 carbon atoms.
Claim 8
Dependent Claim
21 words
The fiber of claim 6 wherein the diol is selected from the group consisting of aliphatic diols, bis(hydroxyphenyl)alkanes, di(hydroxyphenyl)sulfones and di(hydroxyphenyl)ethers.
Claim 9
Dependent Claim
12 words
The fiber of claim 7 wherein the diol is an aliphatic diol.
Claim 10
Dependent Claim
11 words
The fiber of claim 8 wherein the diol is ethylene glycol.
Claim 11
Dependent Claim
25 words
The fiber of claim 1 wherein the siloxane block polymer is such that R is an oleophillic group containing from 1 to 18 carbon atoms.
Claim 12
Dependent Claim
14 words
The fiber of claim 10 wherein R contains from 1 to 12 carbon atoms.
Claim 13
Dependent Claim
12 words
The fiber of claim 11 wherein R is either ethyl or 2-ethylhexyl.
Claim 14
Dependent Claim
25 words
The fiber of claim 1 wherein the siloxane block polymer is such that R' is an oleophillic group containing from 1 to 8 carbon atoms.
Claim 15
Dependent Claim
11 words
The fiber of claim 13 wherein R' is an alkyl group.
Claim 16
Dependent Claim
9 words
The fiber of claim 14 wherein R' is methyl.
Claim 17
Dependent Claim
25 words
The fiber of claim 1 wherein the siloxane block polymer is such that z is an oleophillic group containing from 1 to 25 carbon atoms.
Claim 18
Dependent Claim
18 words
The fiber of claim 16 wherein Z is an oleophillic group containing from 1 to 15 carbon atoms.
Claim 19
Dependent Claim
26 words
The fiber of claim 17 wherein Z is substituted with a group selected from the group consisting of halogen, cyano, amino, carboxy, sulfonate, alkylmercapto and hydroxy.
Claim 20
Dependent Claim
21 words
The fiber of claim 1 wherein the siloxane block polymer is such that a has a value of 0 to 5.
Claim 21
Dependent Claim
22 words
The fiber of claim 1 wherein the siloxane block polymer is such that b has a value of from 10 to 10,000.
Claim 22
Dependent Claim
15 words
The fiber of claim 20 wherein b has a value of from 50 to 200.
Claim 23
Dependent Claim
22 words
The fiber of claim 1 wherein the siloxane block polymer is such that c has a value of from 0 to 100.
Claim 24
Dependent Claim
9 words
The fiber of claim 22 wherein c is zero.
Claim 25
Dependent Claim
26 words
The fiber of claim 1 wherein the siloxane block polymer is such that R s 2-ethylhexyl, a is 0, b is 75, and c is zero.
Claim 26
Dependent Claim
43 words
The fiber of claim 1 wherein the siloxane block polymer is such that R is 2-ethylhexyl, R' is methyl, Z is CH 3 O(C 2 H 4 O) 6 .3, a is 5, b is 70, c is zero and x is 3.
Claim 27
Dependent Claim
41 words
The fiber of claim 1 wherein the siloxane block polymer is such that R is ethyl, R' is methyl, Z is --CH 2 CH 2 CF 3 , a is 5, b is 70, c is zero and x is zero.
Claim 28
Dependent Claim
43 words
The fiber of claim 1 wherein the siloxane block polymer is such that R is ethyl, R' is methyl, Z is --C 2 H 4 C 6 H 5 , a is 10, b is 65, c is zero and x is zero.
Claim 29
Dependent Claim
39 words
The fiber of claim 1 wherein the siloxane block polymer is such that R is ethyl, R' is methyl, Z is --C 15 H 31 , a is 5, b is 70, c is zero, and x is 3.
Claim 30
Dependent Claim
43 words
The fiber of claim 1 wherein the siloxane block polymer is such that R is ethyl, R' is methyl, Z is --NCH 2 CH 2 CH 2 CH 2 , a is 5, b is 70, c is zero and x is 3.
Claim 31
Dependent Claim
11 words
The silicone-sheathed polyester fiber of claim 1 cut to staple size.
Claim 32
Dependent Claim
10 words
The silicone-sheathed polyester fiber of claim 1 in tow form.
Claim 33
Dependent Claim
10 words
A yarn comprising a silicone-sheathed polyester fiber of claim 1.
Claim 34
Dependent Claim
11 words
A fiberfill composition comprising a silicone-sheathed polyester fiber of claim 1.
Claim 35
Dependent Claim
10 words
A filament comprising a silicone-sheathed polyester fiber of 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) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |