Polyurethane polyurea particles and process for production there

Details Polyurethane polyurea particles and process for production there Polyurethane polyurea particles and process for production there

1990-05-30

1992-10-13

Kight, III, John

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524846, 528 44, 528 59, 528 61, 528 62, 528 64, C08J 500, C08K 506

Patent

active

051551659

ABSTRACT:
Polyurethane polyurea particles are obtained by an interfacial polymerization reaction between a hydrophobic phase which is capable of forming a three-dimensional crosslinked structure by reaction and is a mixture comprising a polyisocyanate compound and a polyhydroxy compound with the isocyanate groups being stoichiometrically excessive, and a polyamine in an amount not more than one equivalent of the stoichiometrically excessive isocyanate groups in the hydrophobic phase, and by polyurethanization reaction inside the particles.

REFERENCES:
patent: 4083831 (1978-04-01), Santosusso
patent: 4689356 (1987-08-01), Peffley et al.
patent: 4756906 (1988-07-01), Sweeny

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