Method for releasing printed wiring boards from printed wiring b

Details Method for releasing printed wiring boards from printed wiring b Method for releasing printed wiring boards from printed wiring b

1979-12-10

1981-07-21

Smith, John D.

Metal working

Method of mechanical manufacture

Electrical device making

29840, 106 2, 118500, 427 96, 427208, 428352, H05K 334

Patent

active

042790735

ABSTRACT:
A release coating for printing wiring board racks comprises 100 parts by weight of a polyethylene glycol having a molecular weight range of from about 3000 to 3700, about 20 to about 200 parts by weight of a liquid polyethylene glycol having a molecular weight range of from about 380 to about 420, and from 0 to about 35 parts by weight of water.

REFERENCES:
patent: 3443988 (1969-05-01), McCormack et al.
patent: 3625715 (1971-12-01), Nasca
patent: 3745028 (1973-07-01), Rayner
patent: 3829319 (1974-08-01), Suzuki et al.
patent: 3973322 (1976-08-01), Boynton
patent: 4127692 (1978-11-01), Boynton
patent: 4166150 (1979-08-01), Mattur
patent: 4215025 (1980-07-01), Packer et al.
Condensed Chemical Dictionary, Van Nostrand Reinhold Co., pp. 171, 706 .COPYRGT.1971.

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