Block copolymers and process for their preparation

Details Block copolymers and process for their preparation Block copolymers and process for their preparation

1982-09-29

1984-05-29

Lieberman, Allan

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525379, 525380, 525385, 525409, 525410, C08F29700, C08G 6512

Patent

active

044516185

ABSTRACT:
Under particular conditions, a cationic ring-opening polymerization of an (single) oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and a haloalkyl epoxide, in the presence of a hydroxyl-terminated prepolymer ("HTP") and a particular catalyst, produces a polymerization having `living polymerization` characteristics, provided the OH groups are aliphatic OH groups and not aromatic OH groups. The result is an AB or ABA type block copolymer the molecular weight (mol wt) of which is directly proportional to the conversion of the monomer to the block copolymer. The HTP which may be a mono-, di-, tri-, or tetra-hydroxyl-terminated prepolymer, serves as a chain propagator which initially furnishes OH groups as propagation sites. Linear block copolymers or branched block copolymers are formed, depending upon the structure of the HTP. Where one segment of an AB or ABA type block contains halogen, the segment may be aminated. If the other segment is hydrophobic, the aminated block copolymer is amphiphilic.

REFERENCES:
patent: 3754053 (1973-08-01), Kray et al.
patent: 3850856 (1974-11-01), Dreyfoss
patent: 3864288 (1975-02-01), Riew et al.
patent: 4200733 (1980-04-01), Perner et al.
patent: 4256910 (1981-03-01), Asu

Affiliated with

Also associated with

Rating

Block copolymers and process for their preparation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Block copolymers and process for their preparation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Block copolymers and process for their preparation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1398492