Back to results
US 9,434,867 B2Granted
Bisphenol A (BPA) free epoxy resins
AssigneeUniversity of Massachusetts Lowell
InventorDaniel Schmidt
Life of this patent
Estimating the term…
Abstract
An epoxy resin is provided that includes a diglycidyl ether of a substituted cycloaliphatic diol or bis-thiol, and a thermoset epoxy polymer is provided employing the same. The epoxy resin is bisphenol A free, and capable of forming thermoset epoxy polymers with fewer associated health and environmental concerns than conventional epoxies based on phenolic compounds.
Claims13
An adhesive composition comprising an epoxy resin represented by:
- wherein A and A′ are each independently selected from the group consisting of 0 or S;
- wherein R5, R6, R11, and R12 are each independently selected from hydrogen or a C1 - C6 straight chain or branched alkyl or alkenyl group, wherein the alkyl or alkenyl group is optionally substituted with one or more substituents, each of which is independently selected from NH2, OH, CF3, CN, CO2H, C(O)H or halogen, provided that at least one of R5, R6, R11, and R12 is not hydrogen;
- wherein adjacent R groups may optionally form a fused ring selected from a C5 - C7 membered aromatic ring, or a C3 - C8 cycloalkyl or heterocycle;
- wherein R is derived from an aliphatic or cycloaliphatic molecule comprising at least two functional groups;
- X is 1 or greater;
- Y is 0 or greater;
- and
- wherein the epoxy resin has a weight average molecular weight of less than about 2,000 Daltons and wherein the epoxy resin has a reduced potential to release endocrine disrupting compounds compared to bisphenol A and related phenolic compounds.
5 more elements
An adhesive composition comprising an epoxy resin represented by:
- wherein A and A′ are each independently selected from the group consisting of O or S;
- wherein R5, R6, R11, and R12 are each independently selected from hydrogen or a C1 - C6 straight chain or branched alkyl or alkenyl group, wherein the alkyl or alkenyl group is optionally substituted with one or more substituents, each of which is independently selected from NH2, OH, CF3, CN, CO2H, C(O)H or halogen, provided that at least one of R5, R6, R11, and R12 is not hydrogen;
- X is 1 or greater;
- Y is 1 or greater;
- and
- wherein the epoxy resin has a weight average molecular weight of less than about 2,000 Daltons and wherein the epoxy resin has a reduced potential to release endocrine disrupting compounds compared to bisphenol A and related phenolic compounds.
3 more elements
Dependencies are inferred from the claim text.