Cycloolefin copolymers (COCS) as substrate material for liquid-c

Details Cycloolefin copolymers (COCS) as substrate material for liquid-c Cycloolefin copolymers (COCS) as substrate material for liquid-c

1994-11-16

1998-04-28

Achutamurthy, Ponnathapura

Chemistry of hydrocarbon compounds

Product blend, e.g., composition, etc., or blending process...

Component of indefinite molecular weight greater than 150

580 10, 580 17, 580 20, 580350, 526127, 526160, 25229901, C10L 116, C08F 462, C09K 1938

Patent

active

057446644

ABSTRACT:
A substrate for liquid-crystal displays is formed from polymers of polycyclic olefins by polymerization, without ring opening, of at least one monomer of the formula (I), (II), (III), (IV), (V) or (VI). The novel use of cycloolefin copolymers as substrate material facilitates process temperatures of above 180.degree. C. in the production of displays. Cycloolefin copolymers are lighter and less brittle than glass. Compared with other plastics, they have advantages in photoelastic constants, thermal expansion, hardness, density, transparency, water absorption and with respect to birefringence. Furthermore, they have high resistance to polar solvents.

REFERENCES:
patent: 4456638 (1984-06-01), Petcavich
patent: 5087077 (1992-02-01), Breckner et al.
patent: 5087677 (1992-02-01), Brekner et al.
patent: 5276098 (1994-01-01), Kohara et al.
patent: 5334424 (1994-08-01), Hani et al.
patent: 5371158 (1994-12-01), Brekner et al.
European abstract 485-893-A.
Derwent abstract 485893.
European abstract 362-814-A.
European abstract 283-164-A.
European abstract 501-370-A.

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