Preparation of insoluble polymer powders which are only slightly

Details Preparation of insoluble polymer powders which are only slightly Preparation of insoluble polymer powders which are only slightly

1985-09-18

1987-03-03

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 71, C08F 234

Patent

active

046476377

ABSTRACT:
Insoluble polymer powders which are only slightly swellable and are based on N-vinylpyrrolidone are prepared by polymerization of N-vinylpyrrolidone or a mixture of this with copolymerizable monomers and from 0.1 to 10% by weight, based on the total amount of monomers, of a crosslinking agent in a powder bed in the presence of a heat-transfer medium, which is inert to the reactants, and in the absence of oxygen and polymerization initiators, at from 90.degree. to 220.degree. C., while maintaining the powder state, circulating the reaction mass and evaporating the heat-transfer medium from the polymerization zone. The resulting insoluble polymers which are only slightly swellable are used as adsorbents or formulation assistants for fertilizers and crop protection agents.

REFERENCES:
patent: 3689439 (1972-09-01), Field
patent: 3933766 (1976-01-01), Hofmann
patent: 4013825 (1977-05-01), Denzinger et al.
patent: 4059552 (1977-11-01), Zweigle
patent: 4135043 (1979-01-01), Kast et al.
patent: 4361689 (1982-11-01), Patel
patent: 4451582 (1984-05-01), Denzinger

Affiliated with

Also associated with

Rating

Preparation of insoluble polymer powders which are only slightly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of insoluble polymer powders which are only slightly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of insoluble polymer powders which are only slightly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1017349