Process for preparing vinyl chloride polymer improved in plastic

Details Process for preparing vinyl chloride polymer improved in plastic Process for preparing vinyl chloride polymer improved in plastic

1990-07-31

1993-04-20

Henderson, Christopher

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526202, C08F 220

Patent

active

052044211

ABSTRACT:
A process for preparing a vinyl chloride polymer of the present invention comprises initiating suspension polymerization by suspending a vinyl chloride monomer in an aqueous medium in the presence of a first dispersion stabilizer and adding a second dispersion stabilizer at a specified time after the initiation of polymerization. Here, as the first dispersion stabilizer, (A) a partially saponified polyvinyl alcohol with a high saponification degree and (B) a hydroxypropylmethyl cellulose are used in combination, and as the second dispersion stabilizer, (C) a partially polyvinyl alcohol with a low saponification degree is used. According to the process, it is possible to prepare a vinyl chloride polymer with excellent characteristics such as plasticizer take-up, etc.

REFERENCES:
patent: 4845174 (1989-07-01), Amano
patent: 4940759 (1990-07-01), Yang

Affiliated with

Also associated with

Rating

Process for preparing vinyl chloride polymer improved in plastic 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 improved in plastic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing vinyl chloride polymer improved in plastic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1526825