High temperature performance polymers for stereolithography
First Claim
Patent Images
1. A liquid polymer precursor comprising:
- from about 5 to about 15 weight percent of at least one vinyl ether functionalized compound;
an amount of at least one epoxy functionalized compound ranging from about 2 to about 10 times the weight of vinyl ether functionalized compound in the precursor composition;
an amount of at least one acrylate functionalized compound ranging from about 2 to about 8 times the weight of vinyl ether functionalized compound in the precursor composition; and
at least one photoinitiator wherein the epoxy functionalized compounds, the vinyl ether functionalized compounds and the acrylate functionalized compounds are present in the composition in an amount sufficient to ensure that upon photoinitiation, the epoxy functionalized compounds polymerize primarily by cationic chain transfer polymerization and wherein the vinyl ether functionalized compounds polymerize primarily by radical polymerization and combine with the acrylate functionalized compounds to form a copolymer.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to polymer precursors used in sterolithography. Specifically, the invention provides a novel resin having a glass transition temperature (Tg) that is substantially higher than any existing resins. The polymer precursors comprise an admixture of at least one vinyl ether, functionalized compound and at least one epoxy functionalized compound, at least one acrylate functionalized compound, and a photoinitiator, wherein the polymer precursor composition cures by a dual cure mechanism utilizing a free radical pathway as well as a cationic pathway thus yielding improved green strength.
41 Citations
15 Claims
-
1. A liquid polymer precursor comprising:
-
from about 5 to about 15 weight percent of at least one vinyl ether functionalized compound; an amount of at least one epoxy functionalized compound ranging from about 2 to about 10 times the weight of vinyl ether functionalized compound in the precursor composition; an amount of at least one acrylate functionalized compound ranging from about 2 to about 8 times the weight of vinyl ether functionalized compound in the precursor composition; and at least one photoinitiator wherein the epoxy functionalized compounds, the vinyl ether functionalized compounds and the acrylate functionalized compounds are present in the composition in an amount sufficient to ensure that upon photoinitiation, the epoxy functionalized compounds polymerize primarily by cationic chain transfer polymerization and wherein the vinyl ether functionalized compounds polymerize primarily by radical polymerization and combine with the acrylate functionalized compounds to form a copolymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A liquid polymer precursor comprising:
-
from about 5 to about 15 weight percent of difunctional, and polyfunctional vinyl ether terminated monomers, oligomers and mixtures thereof; at least one cycloaliphatic diepoxy in an amount of from 4 to 7 times the amount of the vinyl ether present in the polymer precursor; at least one non-volatile diacrylate in an amount of from 3 to 5 times the amount of vinyl ether present in the polymer precursor; at least one cationic photoinitiator; at least one free radical photoinitiator; and at least one compound selected from the group consisting of alcohols, diols, polyols, and mixtures thereof wherein the epoxy functionalized compounds, the vinyl ether functionalized compounds and the acrylate functionalized compounds are present in the composition in an amount sufficient to ensure that upon photoinitiation, the epoxy functionalized compounds polymerize primarily by cationic chain transfer polymerization and wherein the vinyl ether functionalized compounds polymerize primarily by radical polymerization and combine with the acrylate functionalized compounds to form a copolymer.
-
-
15. A liquid polymer precursor comprising:
-
from about 5 to about 15 weight percent bis-(4-vinyl oxy butly)isophthalate vinyl ether; at least one cycloaliphatic diepoxy having the following composition;
##STR2## in an amount of from 4 to 7 times the amount of the vinyl ether present in the polymer precursor;ethoxylated bis phenol A diacrylate in an amount of from 3 to 5 times the amount of vinyl ether present in the polymer precursor; at least one cationic photoinitiator; at least one free radical photoinitiator; and at least one diol or polyol having a molecular weight greater than 200.
-
Specification