Polysiloxane-polyoxyalkylene block copolymers with different pol

Details Polysiloxane-polyoxyalkylene block copolymers with different pol Polysiloxane-polyoxyalkylene block copolymers with different pol

1993-08-26

1994-04-26

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521155, 521174, 556445, C08G 800

Patent

active

053067371

ABSTRACT:
Polysiloxane-polyoxyalkylene block copolymers having different polyoxyalkylene blocks in the average molecule are prepared. The mixture of the polyoxyalkylene blocks consists of at least one polyoxyalkylene group A and at least one polyoxyalkylene group B and/or at least one polyoxyalkylene group C, each polyoxyalkylene group A having an average molecular weight of 600 to 5,500 and consisting of 20 to 90% by weight of oxyethylene units and 80 to 10% by weight of oxypropylene units, polyoxyalkylene group B having an average molecular weight of 500 to 5,000 and consisting of 2 to 19% by weight of oxyethylene units and 98 to 81% by weight of oxypropylene units, polyoxyalkylene group C having an average molecular weight of 1,500 to 4,500 and consisting of oxypropylene units. Up to 20% by weight of the oxypropylene units is replaceable by oxybutylene units and the molar ratio of polyoxyalkylene groups A to the sum of the polyoxyalkylene groups B and C is 1:4 to 4:1. The block copolymers are highly effective stabilizers for the production of flexible polyurethane foams with an excellent ratio of cell fineness of the foam to air permeability of the foam.

REFERENCES:
patent: 4855329 (1989-08-01), Blevins et al.
patent: 5145879 (1992-09-01), Budnik et al.

Affiliated with

Also associated with

Rating

Polysiloxane-polyoxyalkylene block copolymers with different pol does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polysiloxane-polyoxyalkylene block copolymers with different pol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polysiloxane-polyoxyalkylene block copolymers with different pol will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1712049