Block copolymer of polyesters and polycarbonates and process for

Details Block copolymer of polyesters and polycarbonates and process for Block copolymer of polyesters and polycarbonates and process for

1995-10-27

1997-05-20

Mosley, Terressa M.

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

Synthetic resins

From carboxylic acid or derivative thereof

525439, 528196, 528198, 528199, 528200, 528271, 528272, 528354, 528355, 528359, C08G 6378

Patent

active

056313446

ABSTRACT:
The block copolymer of polyesters and polycarbonates comprises at least one of each of the constituting units of (I) and (II) having the general formulae: ##STR1## where the sign * indicates an asymmetric carbon atom; R.sub.1, R.sup.2, R.sup.3 and R.sup.4 are either a hydrogen atom or a methyl group; m and n are respective a natural numbers ranging from 300 to 5000: The block copolymer is obtained by successive ring-opening and copolymerization of optically active .beta.-butyrolactones and cyclic carbonates in the presence of a catalyst.
The block polymer obtained has high molecular weight and high melting temperature, and can thus be used as a high strength material for practical use and which has bio-degradable and hydrolyzable nature.

Affiliated with

Also associated with

Rating

Block copolymer of polyesters and polycarbonates and process for 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 copolymer of polyesters and polycarbonates and process for, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Block copolymer of polyesters and polycarbonates and process for will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1724718