Polymeric opaque particles and process for making same

Details Polymeric opaque particles and process for making same Polymeric opaque particles and process for making same

1987-11-05

1989-05-09

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524458, 524460, 525291, 525292, 525293, 525295, 525296, 525301, 525304, 525308, 525902, 525303, C08F26510

Patent

active

048291021

ABSTRACT:
Polymer opaque particles and a process for making same are disclosed. These particles comprise an emulsion polymerized core copolymer having, as one constituent thereof, between about 15% and about 40% by weight of a monomer having the general formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.4 are independently selected from hydrogen, nitro, amino nitrile, hydroxyl and halogen groups, and organic radicals such as substituted or unsubstituted alkyl, cycloalkyl or aryl groups, R.sub.3 is selected from hydrogen or substituted or unsubstituted organic radicals such as alkyl, cycloalkyl or aryl groups and A is an organic or inorganic bridge connecting the illustrated atoms, the remainder being a mixture of selected olefinically unsaturated acid and ester monomers, said core particles, in turn being encapsulated with an emulsion polymerized sheath copolymer comprised of one or more nonionic olefinically unsaturated monomers to produce said opague particles. In the present invention, the core polymer resulting from the polymerization of the above-described monomer has a structure in which ##STR2## is a pendant functional group. The finished particles have an average diameter particle size ranging from about 70 to about 4500 nm. and are free of internal microvoids. The present invention further comprises compositions such as paints and paper coatings containing said particles.

REFERENCES:
patent: 3423351 (1969-01-01), Pierce et al.
patent: 4226752 (1980-10-01), Erickson et al.
patent: 4391928 (1983-07-01), Herman
patent: 4427836 (1984-01-01), Kowalski et al.
patent: 4468498 (1984-08-01), Kowalski et al.
patent: 4469825 (1984-09-01), Kowalski et al.
patent: 4594363 (1986-06-01), Blankenship et al.
patent: 4677003 (1987-06-01), Redlich
patent: 4683269 (1987-07-01), Aksman
Chalmers et al., "Air and Polymer Extended Paints," European Supplement to Polymer Paint Colour Journal, pp. 94-102, 10/05/83.
Poehlein, "Emulsion Polymerization," ACS Symposium Series #285, Chapter 6.
Ramaiah et al., "Microvoids in Organic Coatings," Progress in Organic Coatings, vol. 11, (1983), pp. 267-285.

Affiliated with

Also associated with

Rating

Polymeric opaque particles and process for making same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymeric opaque particles and process for making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymeric opaque particles and process for making same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-90594