Coating of fine particles in polyurethane block copolymer binder

Details Coating of fine particles in polyurethane block copolymer binder Coating of fine particles in polyurethane block copolymer binder

1980-08-25

1981-08-25

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 252 6256, 427128, 427130, 4284259, 428480, 428900, B32B 2740, B05D 512

Patent

active

042860229

ABSTRACT:
Coating of fine particles such as magnetizable particles in a binder which is a soluble hydroxyl-terminated polyurethane block copolymer comprising soft or flexible blocks synthesized from polyester or polyether diols and hard blocks synthesized from aliphatic diols containing tertiary amine and p,p'-diphenylmethane diisocyanate. The block copolymer is capable of dispersing as well as acting as a binder for the particles.

REFERENCES:
patent: 3419420 (1968-12-01), Stahly et al.
patent: 3460984 (1969-08-01), Bisschops et al.
patent: 3490945 (1970-01-01), Slovinsky
patent: 4152484 (1979-05-01), Bachmann et al.

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