EP0402103A2
Expired / Lapsed
EP
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Method for orienting a liquid crystal polymer
Assignee: Eneos Corp
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Filing: 1990-06-05
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Granted: —
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Expires: 2010-06-05
Abstract
Abstract Disclosed is a method of preparing an oriented liquid crystal polymer which method comprises applying a rubbing treatment to a surface of a plastics substrate, coating and drying a solution of a polymeric compound having a thermotropic liquid crystal property onto the said surface, and subjecting the resulting laminate to heat-treatment at a temperature at which the polymeric compound exhibits a liquid crystal phase.
Inventors
- 👤 Yasuyuki Takiguchi
- 👤 Shigeki Iida
- 👤 Takehiro Toyooka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 00:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3809; G02B; G02B5/00; G02B5/30; G02B5/3016; G02F1/133365; G02F1/1335; G02F1/13363; C09K2323/00; C09K2323/02; C09K2323/027; G02F1/133633
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A method of preparing an oriented liquid crystal polymer which method comprises applying a rubbing treatment to a surface of a plastics substrate, coating and drying a solution of a polymeric compound having a thermotropic liquid crystal property onto the said surface, and subjecting the resulting laminate to heat-treatment at a temperature at which the polymeric compound exhibits a liquid crystal phase.
Claim 2
Independent Claim
62 words
A method of preparing an oriented liquid crystal polymer which method comprises applying a rubbing treatment to a surface of a plastics substrate, coating and drying a solution of a polymeric compound having a thermotropic liquid crystal property onto the said surface, and subjecting the resulting laminate to heat-treatment at a temperature at which the polymeric compound exhibits a liquid crystal phase.
Claim 3
Dependent Claim
28 words
A method according to claim 1, which further comprises, after the heat treatment, cooling the laminate to a temperature below the glass transition point of the polymeric compound.
Claim 4
Dependent Claim
26 words
A method according to claim 1 or 2, wherein the heat-treatment is carried out at a temperature above the glass transition point of the polymeric compound.
Claim 5
Independent Claim
35 words
A method according to any one of claims 1 to 3, wherein the heat-treatment is carried out at a temperature of from 50 to 300°C for a period of from 10 seconds to 2 hours.
Claim 6
Independent Claim
23 words
A method according to any one of the preceding claims, wherein the polymeric compound has a glass transition point of at least 30°C.
Claim 7
Independent Claim
31 words
A method according to any one of the preceding claims wherein the polymeric compound is a main chain-type liquid crystal polymer having a liquid crystalline residual group in the main chain.
Claim 8
Dependent Claim
19 words
A method according to claim 6 wherein, the liquid crystal polymer is a polyester, polyester amide, polycarbonate or polyether.
Claim 9
Dependent Claim
48 words
A method according to claim 7 wherein the liquid crystalline residual group has the following formula: (̵M¹-X¹)̵(̵A¹-X²)̵ wherein X¹ and X² each represent, independently, -COO-, -CONH-, -OCO- or -O-; M¹ represents -Ph-COO-Ph-, * represents an asymmetric carbon atom, and n represents an integer of from 0 to 18.
Claim 10
Dependent Claim
68 words
A method according to claim 6 wherein the liquid crystalline residual group has the following structural formula (5): and M² represents a group selected from -Ph-Ph-R³, -O-Ph-Ph-R³, -Ph-COO-Ph-R³, -O-Ph-COO-Ph-R³, -Ph-COO-Ph-R³, -O-Ph-OCO-Ph-R³, -Ph-Ph-COO-Ph-R³, -O-Ph-Ph-COO-Ph-R³, -Ph-COO-Ph-Ph-R³, -O-Ph-COO-Ph-Ph-R³, -Ph-Ph-OCO-Ph-R³, -O-Ph-OCO-Ph-Ph-R³, -Ph-OCO-Ph-Ph-R³ and -O-Ph-OCO-Ph-Ph-R³, wherein R³ is selected from hydrogen, a (C₁-C₁₈) alkyl group, (C₁-C₁₈) alkoxy group, halogen, nitro group and cyano group; and n represents an integer of 0 to 18.
Claim 11
Dependent Claim
30 words
A laminate which comprises a plastics substrate and a liquid crystal polymeric film and which is obtainable by the method as claimed in any one of claims 1 to 9.
References Cited (Backward Citations)
No citation records indexed.
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