Process for preparing particulate polyurethane polymers and the

Details Process for preparing particulate polyurethane polymers and the Process for preparing particulate polyurethane polymers and the

1975-07-17

1976-12-28

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 336UB, 260 775AM, 260859R, 260859PV, C08L 7512

Patent

active

040002187

ABSTRACT:
Particulate thermoplastic polyurethane polymers are produced in inert organic non-solvent for the polymer by polymerization of diisocyanate, dihydroxy polymer and chain extender in the presence of an organic polymeric interfacial agent. The agent can be a block copolymer of C.sub.6 -C.sub.30 alkyl alkenoate and vinyl halide, a block copolymer of the alkenoate and a polyoxyalkylene glycol, a block copolymer of the alkenoate and a cyclic ester such as caprolactone, or a graft copolymer of the alkenoate, vinyl monomer with hydroxyl or amino group such as an hydroxyalkyl acrylate or an amino alkyl acrylate, and a cyclic ester.

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