Process for the preparation of modified resin useful as a low-st

Details Process for the preparation of modified resin useful as a low-st Process for the preparation of modified resin useful as a low-st

1989-07-24

1990-07-17

Marquis, Melvin I.

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

Synthetic resins

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

525102, 525105, 525403, 525474, C08F28300

Patent

active

049422073

ABSTRACT:
A suspension or emulsion polymerization process for the preparation of modified resin useful as a low-stress semiconductor encapsulant which comprises reacting a silicone oil or a silicone resin an having at least two silanol groups or hydrolyzable alkoxy groups with a silane coupling agent having at least two hydrolyzable alkoxy groups to form a suspension or emulsion of a reactive intermediate product, azeotropically distilling the resulting suspension or emulsion to produce a distrilled intermediate product, and adding an epoxy resin or a phenol resin to the distilled intermediate product to produce a matrix having insoluble and infusible spherical particles.

REFERENCES:
patent: 4251426 (1981-02-01), McClure et al.
patent: 4287326 (1981-09-01), Mikami
patent: 4749764 (1988-06-01), Koerner et al.

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