Title: Abrasion resistant silicone coated polycarbonate article

Abstract: A process, and the article produced thereby, for providing a uniformly and tenaciously adhered abrasion resistant and chemical resistant non-opaque coating on polycarbonate articles. The process comprises priming the surface of the polycarbonate article with an adhesion promoting thermoplastic acrylic polymer by forming a thin film of said thermoplastic acrylic polymer on the surface of the polycarbonate article, applying a silica filled organopolysiloxane coating composition onto the primed polycarbonate article, and thereafter curing the silica filled organopolysiloxane to form a hard, abrasion and chemical solvent resistant top coat which is tenaciously adhered to the polycarbonate article. The non-opaque coated polycarbonate article produced by this process comprises a polycarbonate substrate having (i) a primer layer comprised of a thermoplastic acrylic polymer, and (ii) a thermoset silica filled organopolysiloxane top coat.

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Inventors: Schroeter, Siegfried H. (Schenectady, NY, US)
Olson, Daniel R. (Clifton Park, NY, US)

Application Number: 956873
Filing Date: 1978-11-01
Publication_date: 1980-12-16
Assignee: General Electric Company (Pittsfield, MA)
Primary Class(es): 428/331 351/166, 427/160, 427/167, 427/387, 428/387, 428/404, 428/412, 428/447, 428/451, 428/520, 428/911, 428/918
Other Classes:
US Patent Ref:

2976184	Mar, 1961	Blatz	428/331.
3379607	Apr, 1968	Foster et al.	428/450.
3451838	Jun, 1969	Burzynski et al.	428/412.
3488215	Jan, 1970	Shepherd et al.	351/166.
3582398	Jun, 1971	Ringler	428/412.
3637416	Jan, 1972	Misch et al.	351/160.
3661685	May, 1972	Osteen	240/25.
3707397	Dec, 1972	Gagnon	428/412.
3865619	Feb, 1975	Pennewiss et al.	106/13.
3953115	Apr, 1976	French et al.	351/166.
3968305	Jul, 1976	Oshima et al.	428/334.
3968309	Jul, 1976	Matsuo et al.	428/409.
3978178	Aug, 1976	Oshima et al.	264/25.
3986997	Oct, 1976	Clark	351/166.
4026826	May, 1977	Yoshida et al.	528/13.
4027073	May, 1977	Clark	351/166.
4028300	Jun, 1977	Wake	260/31.
4041120	Aug, 1977	Oshima et al.	264/171.
4045602	Aug, 1977	Sommer et al.	427/386.
4064286	Dec, 1977	Hahn	428/447.
4080476	Mar, 1978	Laskey	428/413.
4103065	Jul, 1978	Gagnon	428/336.
4159206	Jun, 1979	Armbrusteret al.	428/447.

Other Refs: 2811072

Sep, 1978	DE.

Primary Examiner: Ansher, Harold
Assistant Examiner:
Attorney: Mufatti; William F.