Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1997-06-23
1998-09-15
Sellers, Robert E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523434, 523457, 523459, 523467, 525527, 525529, 525530, 525531, C08K 322, C08L 902, C08L 6302
Patent
active
058079106
ABSTRACT:
An adhesive for a flexible printed circuit board and the method of preparing the same where the adhesive displays excellent migration inhibition, moisture adsorption resistance, and superior peeling strength, heat resistance, solvent resistance, chemical resistance, flexibility, and electrical properties. The adhesive is prepared by pre-polymerizing an epoxy resin, a COOH-containing rubber, a filler, and a primary catalyst in a solvent using a tertiary amine as a primary catalyst to form a prepolymer, followed by curing the prepolymer using a curing agent and a curing catalyst. The adhesive is coated on a plastic film, dried and laminated with a copper foil and then cured at an elevated temperature to form a substrate.
REFERENCES:
patent: 4465542 (1984-08-01), Furihata
Hwang Yeong-Tsyr
Li Hsiao-Chian
Tseng Tseng-Young
Industrial Technology Research Institute
Mek Tec Corporation
Sellers Robert E.
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