Multi-block polymer comprising an ester prepolymer, chain extend

Details Multi-block polymer comprising an ester prepolymer, chain extend Multi-block polymer comprising an ester prepolymer, chain extend

1990-12-06

1992-03-17

Sever, Frank

Liquid purification or separation

Processes

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

208308, B01D 6136, B01D 7148

Patent

active

050965921

ABSTRACT:
The present invention is directed to a process for separating aromatic
on-aromatic mixtures a membrane comprised of a multi-block polymeric material comprising an ester prepolymer made by combining an (A) epoxy with a (B) dianhydride or its corresponding tetraacid or diacid-diester in an A/B mole ratio ranging from about 2.0 to 1.05, preferably about 2.0 to 1.1, 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 it corresponding tetraacid or diacid-diester, and diamine in an A/B mole ratio ranging from about 2.0 to 1.05, preferably about 2.0 to 1.1, (b) and (A) dianhydride or its corresponding tetraacid or diacid-diester combined with a monomer selected from (B) diisocyanate, polyester, and diamine in an A/B mole ratio ranging from about 2.0 to 1.05, preferably about 2.0 to 1.1; and (c) and (A) diamine combined with a monomer selected from (B) epoxy, diisocyanate, and dianhydride or its corresponding tetraacid or diacid-diester in an A/B mole ratio ranging from about 2.0 to 1.05, preferably about 2.0 to 1.1, and mixtures thereof. The present invention is also directed to membranes made of the above recited multi-block polymeric materials, especially membranes comprising thin, dense (non porous) films of said multi-block polymeric material deposited on a micro-porous support layer producing a thin film composite membrane.
The membranes of the multi-block polymeric material, especially the thin film composite membranes, are useful for separating aromatic hydrocarbons from mixtures of same with non-aromatic hydrocarbons under perstraction or pervaporation conditions.

REFERENCES:
patent: 3567632 (1971-03-01), Richter et al.
patent: 4298707 (1981-11-01), Hergenrother et al.
patent: 4316967 (1982-02-01), Hergenrother et al.
patent: 4532041 (1985-07-01), Shuey et al.
patent: 4690873 (1987-09-01), Makino et al.
patent: 4746474 (1988-05-01), Kohn
patent: 4918119 (1990-04-01), Seltmann et al.
patent: 4944880 (1990-07-01), Ho et al.
patent: 4990275 (1991-02-01), Ho et al.

Affiliated with

Also associated with

Rating

Multi-block polymer comprising an ester prepolymer, chain extend does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-block polymer comprising an ester prepolymer, chain extend, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-block polymer comprising an ester prepolymer, chain extend will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1473586