US5132390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low melting, soluble, liquid crystalline polyesters
Assignee: Elsicon Inc
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Filing: 1991-05-13
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Granted: 1992-07-21
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Expires: 2011-05-13
Abstract
Abstract The present invention is directed to liquid cyrstalline polyesters which are soluble and have low melting points. Preferably the solubility in halogenated solvent is greater than 10 wt. % and the crystalline melting point is less than 125° C. The polyesters are thermotropic and nematic, and preferably have a number average molecular weight from 1,000 to 25,000. The polyesters include a cyclohexane ring in the backbone and are more particularly main-chain thermotropic polyester which contain trans-1,4 cyclohexane dicarboxylate mesogens and flexible spacer groups. These compositions are useful in coating applications including floor coverings.
Inventors
- 👤 Roman C. Domszy
- 👤 Paul J. Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:48
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G63/21; C08G63/18; C08G63/199; C08G63/60; C08G63/66; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3809
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
101 words
A polyester including a chain structure of ##STR5## where X is selected from the group consisting of --C(O)--O--CH 2 CH 2 O--(CH 2 CH 2 O) n --C(O)--, --C(O)--O--CH 2 --(--Si(CH 3 ) 2 --O--) n --Si(CH 3 ) 2 --CH 2 --O--C(O)--, --C(O)--O--CH 2 CH(CH 3 )O--(CH 2 CH(CH 3 )O) n --C(O)--, --O--CH 2 CH 2 O--(CH 2 CH 2 O) n --O--, --O--CH 2 --(--Si(CH 3 ) 2 --O--) n --Si(CH 3 ) 2 --CH 2 --O--, --O--CH 2 CH(CH 3 )O--(CH 2 CH(CH 3 )O) n --, and mixtures thereof; and where n is 1 to 6.
Claim 2
Dependent Claim
101 words
A polyester including a chain structure of ##STR5## where X is selected from the group consisting of --C(O)--O--CH 2 CH 2 O--(CH 2 CH 2 O) n --C(O)--, --C(O)--O--CH 2 --(--Si(CH 3 ) 2 --O--) n --Si(CH 3 ) 2 --CH 2 --O--C(O)--, --C(O)--O--CH 2 CH(CH 3 )O--(CH 2 CH(CH 3 )O) n --C(O)--, --O--CH 2 CH 2 O--(CH 2 CH 2 O) n --O--, --O--CH 2 --(--Si(CH 3 ) 2 --O--) n --Si(CH 3 ) 2 --CH 2 --O--, --O--CH 2 CH(CH 3 )O--(CH 2 CH(CH 3 )O) n --, and mixtures thereof; and where n is 1 to 6.
Claim 3
Dependent Claim
11 words
The polyester of claim 1 wherein n is 1 to 4.
Claim 4
Dependent Claim
16 words
The polyester of claim 1 wherein the number average molecular weight is from 1,000 to 25,000.
Claim 5
Dependent Claim
46 words
The polyester of claim 1 wherein X is selected from the group consisting of --C(O)--O--CH 2 CH 2 O--(CH 2 CH 2 O) n --C(O)--, --O--CH 2 CH 2 O--(CH 2 CH 2 O) n --O--, and mixtures thereof; and where n is 1 to 6.
Claim 6
Dependent Claim
16 words
The polyester of claim 4 wherein the number average molecular weight is from 1,000 to 25,000.
Claim 7
Dependent Claim
147 words
The polyester of claim 1 having a structure selected from the group consisting of ##STR6## where X and n are as defined in claim 1; Y is independently selected from the group consisting of HO-- CH 2 ═CH--C(O)--O--, CH 2 ═C(CH 3 )--C(O)--O--, CH 2 ═CH--CH 2 --O--, CH 2 ═C(CH 3 )--C(O)--OCH 2 CH 2 N--C(O)--O--, ##STR7## O--C═N--R 1 --N(H)--C(O)--O--; Y' is independently selected from the group consisting of HO--, CH 2 ═CH--CH 2 --O--, ##STR8## HO--R 1 --O--, NH 2 --R 1 --NR 2 --, R 2 --C(═CH 2 )--C(O)--O--R 1 --O--, and Cl--; R 1 is selected from the group consisting of C 2 to C 20 alkyl, C 2 to C 20 arylalkyl, and C 2 to C 20 cycloalkyl; R 2 is selected from the group consisting of H--, and C 1 to C 4 alkyl; and z is 1 to 50.
Claim 8
Dependent Claim
11 words
The polyester of claim 6 wherein n is 1 to 4.
Claim 9
Dependent Claim
11 words
The polyester of claim 6 wherein z is 1 to 5.
Claim 10
Dependent Claim
9 words
A coating composition comprising the polyester of claim 6.
Claim 11
Dependent Claim
9 words
A floor covering comprising the polyester of claim 6.
Claim 12
Dependent Claim
24 words
A polyester comprising a cyclohexane ring in the backbone, the polyester being thermotropic and nematic, and having a crystalline melting point less than 125°.
Claim 13
Dependent Claim
24 words
A polyester comprising a cyclohexane ring in the backbone, the polyester being thermotropic and nematic, and having a crystalline melting point less than 125°.
Claim 14
Dependent Claim
14 words
The polyester of claim 11 wherein the crystalline melting point less than 100° C.
Claim 15
Dependent Claim
16 words
The polyester of claim 11 wherein the solubility in halogenated solvent greater than 10 wt. %.
Claim 16
Dependent Claim
16 words
The polyester of claim 11 wherein the number average molecular weight is from 1,000 to 25,000.
Claim 17
Dependent Claim
14 words
The polyester of claim 11 wherein the nematic range is at least 40° C.
Claim 18
Dependent Claim
11 words
The polyester of claim 11 wherein the polyester is a homopolymer.
Claim 19
Dependent Claim
12 words
The polyester of claim 11 wherein the polyester includes a chiral moiety.
References Cited (Backward Citations)
US5030703A
Cited
US5066767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |