Flame retardant pressure-sensitive adhesive and method of making
Assignee3M Innovative Properties Company
InventorsEumi Pyun, Hei-Seung Harry Lee
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Abstract
A method of making a (meth)acrylate copolymer having pendent phosphate-containing groups and a pressure-sensitive adhesive that contains the (meth)acrylate copolymer having pendent phosphate-containing groups are provided. The method includes reacting a precursor (meth)acrylate copolymer having pendent carboxylic acid groups with an epoxy-functionalized phosphate compound. The pendent phosphate-containing groups on the reaction product can function as a flame retardant for the pressure-sensitive adhesive.
Claims11
A method of forming a (meth)acrylate copolymer having a pendent phosphate-containing group, the method comprising:
- providing a precursor (meth)acrylate copolymer having a monomeric unit comprising a pendent carboxylic acid group;
- forming a reaction mixture comprising the precursor (meth)acrylate copolymer and an epoxy-functionalized phosphate compound;
- and
- reacting the epoxy-functionalized phosphate compound with the pendent carboxylic acid group of the precursor (meth)acrylate copolymer to form the (meth)acrylate copolymer having the pendent phosphate-containing group.
A pressure-sensitive adhesive comprising a (meth)acrylate copolymer having pendent phosphate-containing groups, wherein the (meth)acrylate copolymer having pendent phosphate-containing groups is a reaction product of a reaction mixture comprising:
- a) a precursor (meth)acrylate copolymer having a monomeric unit comprising a pendent carboxylic acid group;
- and
- b) an epoxy-functionalized phosphate compound, wherein an epoxy group of the epoxy-functionalized phosphate compound undergoes a ring opening reaction with the monomeric unit comprising a pendent carboxylic acid group.
Dependencies are inferred from the claim text.