Pressure sensitive adhesives made from UV curing of plant oil-based polyesters
AssigneeOregon State University
InventorsKaichang Li, Anlong Li
Life of this patent
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Abstract
An ultraviolet radiation-curable composition comprising a polyester having at least one pendant ultraviolet radiation-curable moiety covalently bonded to the polyester, wherein the polyester does not contain any free-radically polymerizable activated C═C groups.
Claims32
An ultraviolet radiation-curable composition comprising a polyester having at least one pendant ultraviolet radiation-curable moiety covalently bonded to the polyester, wherein the polyester does not contain any free-radically polymerizable activated C═C groups, wherein the composition is made from reacting (i) at least one modified epoxidized plant oil that contains the covalently bonded ultraviolet radiation-curable moiety with (ii) at least one dicarboxylic acid, at least one polycarboxylic acid, or a mixture thereof.
A method comprising:
- reacting (a) at least one epoxidized plant oil with (b) a compound that contains at least one —COOH group and at least one UV-active moiety, wherein the UV-active moiety is benzophenone or thioxanthone;
- a compound that contains at least one —OH group and at least one UV-active moiety, wherein the UV-active moiety is benzophenone, thioxanthone or acetophenone;
- phenylglyoxylic acid;
- or a mixture thereof, resulting in covalently bonding the at least one UV-active moiety to the epoxidized plant oil;
- and
- reacting the resulting modified epoxidized plant oil that contains the at least one covalently bonded UV-active moiety with (c) at least one dicarboxylic acid, at least one polycarboxylic acid, or a mixture thereof, to form a resin.
A method comprising:
- reacting at least one dicarboxylic acid, at least one polycarboxylic acid, or a mixture thereof with (i) at least one epoxidized plant oil or a monocarboxylic acid-modified epoxidized plant oil under reaction condition that the molar ratio of —COOH groups of the at least one dicarboxylic acid, at least one polycarboxylic acid, or a mixture thereof to the epoxy groups of the at least one epoxidized plant oil or a monocarboxylic acid-modified epoxidized plant oil is greater than 1.0 to form a polyester that is capped with —COOH groups at chain ends;
- and
- reacting the resulting polyester with a modified epoxidized plant oil that contains at least one covalently bonded UV-active moiety.
A pressure sensitive adhesive composition made by ultraviolet radiation curing of a polyester having at least one pendant ultraviolet radiation-curable moiety covalently bonded to the polyester, wherein the polyester does not contain any free-radically polymerizable activated C═C groups.
Dependencies are inferred from the claim text.