Linear block copolymers, process for their preparation and adhes

Details Linear block copolymers, process for their preparation and adhes Linear block copolymers, process for their preparation and adhes

1995-03-31

1996-04-23

Zemel, Irina

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

Synthetic resins

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

525314, 525 98, G08F29704

Patent

active

055104231

ABSTRACT:
Block copolymers of the structure A-B-C-D of improved processability derived from a vinyl aromatic monomer and a conjugated diene, having a total bound vinyl aromatic content in the range of from 10 to 40 wt. %, wherein the conjugated diene has been polymerized in a 1,2 or 3,4 addition in an amount of from 1 to 20% of the total bound conjugated diene, and wherein A represents a predominantly poly(vinylaromatic)block, B represents a predominantly poly(conjugated diene), D represents a predominantly poly(vinylaromatic)block, and C represents a tapered block of the conjugated diene occurring in the block B and a the vinyl aromatic occuring in the block D, wherein the tapering in block C shows an increasing content of vinyl aromatic monomer in the direction to block D, wherein the weight ratio of the conjugated diene occurring in block B and the conjugated diene occurring in block C is in the range of from 5:5 to 9:1, and wherein the total apparent molecular weight of which is in the range of from 130,000 to 300,000.

REFERENCES:
patent: 4152370 (1979-05-01), Moczygemba
patent: 4939208 (1990-07-01), Lanza et al.
patent: 5047484 (1991-09-01), Tung
patent: 5071920 (1991-12-01), Tung
patent: 5100938 (1992-03-01), Vitkuske et al.
patent: 5100939 (1992-03-01), Vitkuske et al.
patent: 5206300 (1993-04-01), Chamberlain
patent: 5227419 (1993-07-01), Moczygemba et al.
patent: 5234999 (1993-08-01), Tung
Database WPI--Section Ch, Wk 9413 Derwent Pub. Ltd, Class A-94-1069393 Thermoplastic elastomer composition & JPA-06/057,087 Nippon Soda Co. Jan. 3, 1994 (Abstract).
Block Copolymers, Applied Science Publishers, London, 1972, pp. 82-83.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2309066