Crosslinked triacrylate polymer beads
AssigneeE. I. Du Pont de Nemours and Company
InventorsAbraham B. Cohen, Christina N. Lazaridis
Life of this patent
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Abstract
Discrete, substantially nonswellable crosslinked polymeric beads, 0.7 to 20 .mu.m average diameter wherein at least 90% of the beads by population are below 20 .mu.m, which are nonagglomerating in any solvent or solvents including solvents for the liquid monomer or monomers used in preparation thereof. The polymeric beads are homopolymers of tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers thereof, copolymers of one of said acrylate or methacrylate monomers with up to 50% of a monomer having a single terminal ethylenic group or with up to 75% of a monomer having two terminal ethylenic groups or three terminal ethylenic groups different from said triacrylate or trimethacrylate monomers defined above.
Claims10
Discrete, substantially nonswellable, crosslinked polymeric beads having an average diameter size in the range of 0.7 to 20 .mu.m, wherein at least 90% of the beads by population are below 20 .mu.m, the beads being nonagglomerating in any solvent or solvents including a solvent or solvents for the monomer or monomers used in the preparation of the polymeric beads which are taken from the class consisting of homopolymers of tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers of said tri- and tetraacrylate and tri- and tetramethacrylate monomers, copolymers of one of said tri- and tetraacrylate or said tri- and tetramethacrylate monomers and up to 25% by weight of at least one monomer having one terminal ethylenic group, copolymers of one of said tri- and tetraacrylate or said tri- and tetramethacrylate monomers and up to 50% by weight of at least one monomer having two terminal ethylenic groups or three terminal ethylenic groups different from said triacrylate or trimethacrylate monomers.
Dependencies are inferred from the claim text.