Polymethylpentene release sheet

Details Polymethylpentene release sheet Polymethylpentene release sheet

1989-03-30

1990-06-26

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524401, 524413, 524394, 524579, C08K 504

Patent

active

049372785

ABSTRACT:
A release sheet, comprising poly-4-methylpentene-1 film containing a copper salt of an alkanoic acid and at least one of an alkali metal halide and an alkaline earth metal halide, is disclosed. Such film is useful as a release sheet in the manufacture of printed circuit boards.

REFERENCES:
patent: 2705227 (1955-03-01), Stamatoff
patent: 4269884 (1981-05-01), Della Vecchia
U.S. Appln. No. 07/266878, filed 11/2/88.

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