Laminated transparent plastic material and polymerizable monomer

Details Laminated transparent plastic material and polymerizable monomer Laminated transparent plastic material and polymerizable monomer

1993-01-08

1995-02-28

Sluby, P. C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428337, 428340, 428412, 428414, 428419, 4284244, 4284255, 428510, 428518, 428519, 428520, 264216, B32B 2736, C08J 704

Patent

active

053936078

ABSTRACT:
A laminated transparent plastic material comprises a transparent resin material having a total visible light transmittance of at least 85% and a high hardness transparent resin layer of at least 0.2 mm thick having a pencil hardness of at least 4H, Rockwell M scale hardness of at least 100, and a total visible light transmittance of at least 85% overlying the surface of the transparent resin material, the laminated transparent plastic material having a bending modulus of elasticity of at least 350 kgf/mm.sup.2.
A polymerizable monomer has the formula, ##STR1## where R.sub.5 and R.sub.6 are similar or dissimilar and are selected from group consisting of hydrogen and methyl, k is an integer of 2-10, and the isopropenyl substituent on the aromatic ring is in the p-position or m-position.

REFERENCES:
patent: 3933964 (1976-01-01), Brooks

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