Injection compacting composition for preparing sintered body of

Details Injection compacting composition for preparing sintered body of Injection compacting composition for preparing sintered body of

1991-04-30

1994-02-15

Kight, III, John

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

Synthetic resins

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

525 67, 525 70, 524504, C08F26504

Patent

active

052868028

ABSTRACT:
An injection compacting composition suitable for preparing sintered bodies of metal powders, which can provide, by injection compacting, compacts having a high strength from which the binder can be removed without causing deformation, cracking and other defects, thus providing sintered metallic materials having a high density and no defects such as warpage and cracks in high yields, which comprises (1) a metal powder and (2) an organic binder comprising a composite acrylic polymer and an atactic polypropylene, said composite acrylic polymer being a suspension polymerization product prepared by dissolving (a) a polymer selected from the group consisting of an ethylene-vinyl acetate copolymer and an ethylene-ethyl acrylate copolymer in (b) an acrylic or methacrylic acid ester monomer or a mixture of an acrylic or methacrylic acid ester monomer and a styrene compound monomer, dispersing the resulting solution in an aqueous medium in the presence of a dispersing agent, and subjecting the resulting dispersion to a suspension polymerization.

REFERENCES:
patent: 4000110 (1976-12-01), Saito et al.
patent: 4492783 (1985-01-01), Tanaka et al.
Derwent Abstract of JP 890127706 Japanese Publication No. 91-039577 (Dec. 19, 1990).

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