Free radical initiator delivery system

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing

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Details

502160, 502167, 502168, 502172, B01J 3100

Patent

active

055103073

ABSTRACT:
This invention relates to an improved polymerization free radical initiator delivery system for the polymerization of monomers containing olefinic unsaturation and to the preparation of the initiator which comprises dissolving a water insoluble free radical initiator and an excess amount of the polymeric product of the reaction in a mutual organic solvent having a boiling point below 140.degree. C., in the presence of between about 1.0 and 100 wt. % of a surfactant based on weight of initiator and mixing the resulting solution to achieve uniform molecular distribution of initiator and polymer molecules in the surfactant/solvent mixture; removing the solvent to provide coprecipitated initiator/polymer microparticles and then diluting the coprecipitated microparticles with water under vigorous agitation to form a microparticle emulsion of low viscosity which is suitable as the initiator feed for contact with monomer in a polymerization reaction.

REFERENCES:
patent: 3691125 (1972-09-01), Barabas et al.
patent: 3862915 (1975-01-01), Fried et al.
patent: 4178263 (1979-12-01), Priddy
patent: 4842765 (1989-06-01), Satomi
patent: 5270271 (1993-12-01), Lundin et al.
patent: 5347055 (1994-09-01), Priddy et al.

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