Branched hydroxy-terminated aliphatic polyethers

Details Branched hydroxy-terminated aliphatic polyethers Branched hydroxy-terminated aliphatic polyethers

1988-10-20

1989-11-21

Nielsen, Earl

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

Synthetic resins

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

525403, C08G 6524, C08G 6532

Patent

active

048823953

ABSTRACT:
The invention disclosed is a process for the preparation of branched hydroxy-terminated aliphatic polyethers having alkyl azide substituents, having a structural formula ##STR1## and a molecular weight of abotu 500 to 40,000, and a process for the preparation thereof which comprises the single step of reacting a solid rubbery polyepichlorohydrin (PECH) of molecular weight of about 0.5-5.0.times.10.sup.6 with epichlorohydrin monomer (ECH) and an ionic azide selected from the group consisting of sodium azide, lithium azide and potassium azide, in a suitable organic solvent at elevated temperature, while agitating. According to a further aspect of the invention, the molecular weight of the polyether product may be controlled by adjusting the weight ratio of ECH:PECH, while maintaining a weight ratio of ionic azide: (ECH+PECH) of about 1:1.

REFERENCES:
patent: 3645917 (1972-02-01), Vandenberg
patent: 3971743 (1976-07-01), Breslow
patent: 4379894 (1983-04-01), Frankel et al.

Affiliated with

Also associated with

Rating

Branched hydroxy-terminated aliphatic polyethers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Branched hydroxy-terminated aliphatic polyethers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Branched hydroxy-terminated aliphatic polyethers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1426687