Formaldehyde free microspheres and encapsulation
AssigneeBattelle Memorial Institute
InventorsRamanathan S. Lalgudi, Robert J. Cain
Life of this patent
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Abstract
Processes for producing polymer microcapsules using vicinal functional oligomers are also described. The vicinal functional oligomers can be made by polymerizing an acrylate monomer, a styrene monomer, or both in the presence of a chain transfer agent. The vicinal functional oligomers can be reacted with epichlorohydrin to form vicinal epoxies. The vicinal epoxies can be reacted with polyamines to form epoxy polymer microspheres. The vicinal epoxies can be reacted with carbon dioxide in the presence of a catalyst to form vicinal cyclic carbonates. The vicinal cyclic carbonates can be reacted with polyamines to form isocyanate-free polymer microspheres. Polymer microspheres made by the processes are also described.
Claims9
A process of making polyurethane microspheres consisting essentially of:
- polymerizing a monomer selected from the group consisting of an acrylate monomer, or a styrene monomer, or both, and thioglycerol to form a vicinal functional diol;
- and
- reacting reactants selected from the group consisting of the vicinal functional diol, an isocyanate, and a polyol to form polyurethane polymer microspheres.
Dependencies are inferred from the claim text.