Polybutadiene-epoxy-anhydride laminating resins

Details Polybutadiene-epoxy-anhydride laminating resins Polybutadiene-epoxy-anhydride laminating resins

1987-10-09

1990-01-16

Miller, Edward A.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525117, C08G 5924, C08L 5100

Patent

active

048944130

ABSTRACT:
Improvement in the method for preparing resin compositions for use as a laminate material in printed wiring boards wherein the resin composition is formed by mixing an epoxy-anhydride prepolymer with maleated polybutadiene and a suitable solvent. The improvement involves preparing the epoxy-anhydride prepolymer using a two step procedure instead of a single step. The two step procedure prevents uncontrolled exothermic reactions from occurring during preparation of commercial quantities of the epoxy-anhydride prepolymer and increases the versatility of the process since different anhydrides can be used in each of the two steps.

REFERENCES:
patent: 4132697 (1979-01-01), Barie, Jr. et al.
patent: 4167539 (1979-09-01), Heilman et al.
patent: 4601944 (1986-07-01), Zussman

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