Epoxy-functional polymeric microbeads
AssigneeRenssealer Polytechnic Institute
InventorJames Vincent Crivello
Life of this patent
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Abstract
Epoxy-functionallized polymeric microbeads and dispersions thereof may be prepared using a cationic non-aqueous dispersion-suspension photopolymerization. The polymeric microbeads may be further modified with a variety of additional groups by reaction with various reagents with the epoxy moities.
Claims26
A population of polymeric microbeads bearing epoxy functionality on surfaces thereof and having a narrow particle size distribution, such that the particle size of greater than 90% of the polymeric microbeads in said population is equal to ±20% of the mean particle size, said epoxy functionality arising from one or more multifunctional epoxy monomers chosen from the group consisting of 3,4-epoxycyclohexyl methyl-3′,4′-epoxycyclohexane arboxylate, bis-(3,4-epoxycyclohexyl) adipate, 4-vinylcyclohexene dioxide, epoxy silicone resins, limonene dioxide, dicyclopentadiene dioxide, bisphenol-A diglycidyl ether, bisphenol-F diglycidyl ether, 1,4-butanediol diglycidyl ether, diglycidyl ethers of tetrabromo-bisphenol-A, epoxy cresol novolacs, epoxy phenol novolacs, and diglycidyl phthalate.
Polymeric microbeads prepared by suspension photopolymerization of one or more multifunctional epoxy monomers chosen from the group consisting of:
- 3,4-epoxycyclohexylmethyl-3′,4′-epoxycyclohexane carboxylate, bis-(3,4-epoxycyclohexyl)adipate, 4-vinylcyclohexene dioxide, epoxy silicone resins, limonene dioxide, dicyclopentadiene dioxide, bisphenol-A diglycidyl ether, bisphenol-F diglycidyl ether, 1,4-butanediol diglycidyl ether, diglycidyl ethers of tetrabromo-bisphenol-A, epoxy cresol novolacs, epoxy phenol novolacs, and diglycidyl phthalate.
A process for the preparation of polymeric microbeads comprising:
- (A) forming a dispersion comprising one or more multifunctional epoxy monomers in a non-aqueous suspending medium in the presence of a photoinitiator;
- and
- (B) exposing the dispersion to a source of light to induce polymerization.
A method for attaching functional groups to the surface of a polymeric microbead comprising:
- (A) preparing a dispersion of polymeric microbeads bearing residual epoxy groups on surfaces thereof by:
- (a) forming a dispersion comprising one or more multifunctional epoxy monomers in a non-aqueous suspending medium in the presence of a photoinitiator;
- and
- (b) exposing the dispersion to a source of light to induce polymerization;
- and
- (B) contacting the polymericmicrobeads with a compound which is reactive toward the residual epoxy groups.
Dependencies are inferred from the claim text.