Plastic components of improved hardness and scratch resistance

Details Plastic components of improved hardness and scratch resistance Plastic components of improved hardness and scratch resistance

1980-10-24

1982-01-19

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polycarbonate

351163, 351166, 4284231, 4284237, 4284255, 428437, 528228, 528314, B32B 1710, B32B 2736, G02C 710

Patent

active

043117627

ABSTRACT:
Low hardness and scratch resistance in direct-cast diethylene glycol bis(allyl carbonate) (CR-39.RTM. plastic surface laminae in glass-plastic lenses are analyzed and new plastic formulations, preferably comprising the monomer catalyzed with a mixed isopropyl percarbonate-benzoyl peroxide polymerization catalyst, are disclosed, offering improved hardness and scratch resistance for laminated lenses and also for CR-39.RTM. plastic articles generally.

REFERENCES:
patent: Re25763 (1965-04-01), Marcus
patent: 2464062 (1949-03-01), Strain
patent: 2964501 (1960-12-01), Sarofeen
patent: 4168339 (1979-09-01), Kerko
patent: 4227950 (1980-10-01), Spycher
patent: 4246207 (1981-01-01), Spycher
patent: 4264156 (1981-04-01), Spycher
patent: 4268134 (1981-05-01), Gulati
"Encyclo. Polymer Sci. & Tech.", vol. 1, 1964, pp. 799-803.

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