Multi-block polymer comprising a first prepolymer, made by combi

Details Multi-block polymer comprising a first prepolymer, made by combi Multi-block polymer comprising a first prepolymer, made by combi

1990-12-06

1991-09-17

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210654, 21050037, B01D 6136, B01D 7106

Patent

active

050492810

ABSTRACT:
The present invention is directed to a multi-block polymeric material comprising a first prepolymer, made by combining epoxy with diamine, chain extended with a second, different compatible prepolymer selected from the group of prepolymers comprising (a) and (A) diisocyanate combined with a monomer selected from (B) epoxy, polyester, dianhydride or its corresponding tetraacid or diacid-diester, and diamaine in an A/B mole ratio ranging from about 2.0 to 1.05, (b) an (A) polyester combined with (B) epoxy, in an A/B mole ratio ranging from a bout 2.0 to 1.05, (c) an (A) dianhydride or its corresponding tetraacid or diacid-diester combined with one mole of a monomer selected from (B) epoxy, diisocyanate, polyester, and diamine in an A/B mole ratio ranging from about 2.0 to 1.05, and (d) an (A) diamine combined with a monomer selected from (B) diisocyanate and dianhydride or its corresponding tetraacid or diacid-diester in an A/B mole ratio ranging from about 2.0 to 1.05, and mixtures thereof.

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patent: 4929358 (1990-05-01), Koenitzer
patent: 4944880 (1990-07-01), Ho et al.
patent: 4946594 (1990-08-01), Thaler et al.
patent: 4990275 (1991-02-01), Ho et al.

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