Process for preparing vinyl chloride polymer with two-stage addi

Details Process for preparing vinyl chloride polymer with two-stage addi Process for preparing vinyl chloride polymer with two-stage addi

1990-08-08

1992-03-17

Henderson, Christopher

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526202, 5263442, C08F 220

Patent

active

050969889

ABSTRACT:
A process for preparing a vinyl chloride polymer comprises initiating suspension polymerization with a monomer, etc. being suspended previously in an aqueous medium by used of (A) a particular partially saponified polyvinyl alcohol with high saponification degree and (B) a particular hydroxypropylmethyl cellulose as the first dispersion stabilizer, and adding further the partially saponifice polyvinyl alcohol (A) into the polymerization system at a predetermined timing after the initiation of polymerization. A vinyl chloride polywer with a high bulk density can be obtained, and yet from said polymer, a molded or formed product of high quality with a very small number of fish eyes can be obtained.

REFERENCES:
patent: 4533652 (1985-08-01), Tanaka
patent: 4845174 (1989-07-01), Amano
patent: 4940759 (1990-07-01), Yang
patent: 4957983 (1990-09-01), Hawrylko

Affiliated with

Also associated with

Rating

Process for preparing vinyl chloride polymer with two-stage addi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing vinyl chloride polymer with two-stage addi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing vinyl chloride polymer with two-stage addi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1476626