Process for producing homopolymers or copolymers of olefinically

Details Process for producing homopolymers or copolymers of olefinically Process for producing homopolymers or copolymers of olefinically

1983-07-14

1985-09-03

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 74, 526 88, 5263442, 526345, C08F 200

Patent

active

045393800

ABSTRACT:
The present invention relates to a polymerization process for polymerizing olefinically unsaturated monomer or monomers, wherein inorganic salts are employed to substitute for the traditional emulsifiers employed in the polymerization recipe. The polymerization of olefinically unsaturated monomer or monomers is conducted in the presence of a water soluble initiator. An electrolytic solution of inorganic salt and a buffer solution are introduced into the polymerization mixture at a particular time during reaction period to adequately adjust pH value of the reaction mixture. Further, it is essential to alter the speed of agitation during polymerization by a two-stage operation. The polymer resins so produced have no emulsifier residue contained within the polymer particles, whereby the properties of plastisols from these resins such as viscosity stability, heat stability and clarity are superior to those of the polymer resins produced by conventional emulsion polymerization process or microsuspension polymerization process. The monomer/water ratio of the polymerization recipe thereof is also improved, whereby productivity per batch or run of polymerization is increased.

REFERENCES:
patent: 3661867 (1972-05-01), Koyanagi et al.
patent: 4323664 (1982-04-01), Mukoyama et al.
"Colloid Chemical Studies of Polystyrene Latices Polymerized Without any Surface Active Agents", Kotera et al, Koll ZZ Polym. (1970), 239, pp. 677-681.
"Emulsifier-Free Latex", Willis, Ind. Engr. Chem., (1949), 41 pp. 2272-2276.
"A Method for Preparing Surfactant-Free Polystyrene Latices of High Surface Charge", Furusawa et al., Koll ZZ Polym (1972), 250 pp. 908-909.
"Emulsion Polymerization", D. C. Blackley, (1975), pp. 324-328.

Affiliated with

Also associated with

Rating

Process for producing homopolymers or copolymers of olefinically 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 producing homopolymers or copolymers of olefinically, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing homopolymers or copolymers of olefinically will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-614463