Vapor plating method for plastics

Stock material or miscellaneous articles – Composite – Of polycarbonate

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427162, 427164, 427250, 428447, B05D 136, B05D 704, C23C 1302, G02B 110

Patent

active

042424135

ABSTRACT:
The surface of a plastic substrate is effectively vapor plated with a metal by coating said surface with a coating composition comprising the following components dissolved in a solvent prior to the vapor plating: (A) (i) a co-partial hydrolysis product of an organosiloxane compound of the formula: R.sub.n Si(OR').sub.4-n (wherein n is an integer of 1 to 3, R is a hydrocarbon group having 1 to 6 carbon atoms and R' is an alkyl group having 1 to 4 carbon atoms) and a tetraalkoxysilane, or (ii) a mixture of each partial hydrolysis product of said organosiloxane compound and said tetraalkoxysilane, or (iii) a mixture of said co-partial hydrolysis product (i) and said mixture of each partial hydrolysis product (ii), the amount of the partial hydrolysis product of said tetraalkoxysilane (calculated as SiO.sub.2) being 5 to 100 parts by weight to 100 parts by weight of the partial hydrolysis product of said organosiloxane compound (calculated as R.sub.n SiO.sub.(4-n)/2 wherein n and R are each as defined above); and (B) (i) a copolymer of at least one of alkyl acrylates and alkyl methacrylates with at least one of hydroxyalkyl acrylates and hydroxyalkyl methacrylates, and (ii) an etherified methylolmelamine, the amounts of said copolymer (i) and said etherified methylolmelamine (ii) being 5 to 200 parts by weight and 0 to 150 parts by weight, respectively, based on 100 parts by weight of the partial hydrolysis product of the organosiloxane compound (calculated as R.sub.n SiO.sub.(4-n)/2 wherein n and R are each as defined above).

REFERENCES:
patent: 3677792 (1972-07-01), Best
patent: 3891486 (1975-06-01), Willdorf
patent: 3957918 (1976-03-01), Dickie et al.
patent: 3978252 (1976-08-01), Lombardo et al.
patent: 4005238 (1977-01-01), Gaehde et al.
patent: 4016305 (1977-04-01), Wakabayashi et al.

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