Dispersant system for making polyvinyl chloride which produces l

Details Dispersant system for making polyvinyl chloride which produces l Dispersant system for making polyvinyl chloride which produces l

1989-10-02

1991-04-09

Lipman, Bernard

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

Synthetic resins

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

5253316, 526200, 526224, 526344, C08F 822

Patent

active

050066072

ABSTRACT:
Chlorinated polyvinyl chloride (CPVC) is prepared from polyvinyl chloride (PVC). When PVC is made utilizing polyvinyl alcohol, the low molecular weight CPVC compound so prepared is colored. A low molecular weight CPVC compound prepared from PVC that was made in the presence of a cellulose ether instead of polyvinyl alcohol resulted in a very low color compound having a DE of O by definition. However, a CPVC compound prepared from PVC made in the presence of polyvinyl alcohol resulted in a relatively high color (DE 18.51). During the polymerization of vinyl chloride, polyvinyl alcohol is replaced with the hydroxypropylmethyl cellulose ether having a methoxyl substitution of 15-35 percent and a hydroxypropoxyl substitution of from 4-35 percent.

REFERENCES:
patent: 4471096 (1984-09-01), Sharaby et al.
patent: 4612345 (1986-09-01), Hess
patent: 4797458 (1989-01-01), Sharaby

Affiliated with

Also associated with

Rating

Dispersant system for making polyvinyl chloride which produces l does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dispersant system for making polyvinyl chloride which produces l, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispersant system for making polyvinyl chloride which produces l will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2035439