Light radiation-debondable pressure sensitive adhesives
Assignee3M Innovative Properties Company
InventorsEncai Hao, Yongshang Lu, Jason D. Clapper
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Abstract
The present invention is a pressure sensitive adhesive including a polyurethane polymer comprising a reaction product of an isocyanate, a (meth) acrylate-containing alcohol having at least one (meth)acrylate group and at least one alcohol group, and a polyol component having a defined solubility parameter of less than about 10; an oligomer comprising a multifunctional (meth)acrylate; and a photoinitiator. A peel adhesion of the pressure sensitive adhesive to glass decreases at least about 20% after being exposed to light radiation.
Claims19
A pressure sensitive adhesive comprising:
- a polyurethane polymer comprising a reaction product of:
- an isocyanate;
- a (meth) acrylate-containing alcohol having at least one (meth)acrylate group and at least one alcohol group;
- and
- a polyol component having a defined solubility parameter of less than about 10;
- an oligomer comprising a multifunctional (meth)acrylate;
- and
- a photoinitiator,
- wherein a peel adhesion of the pressure sensitive adhesive to glass decreases by at least about 20% after being exposed to light radiation.
A composition comprising:
- a polyurethane polymer comprising a reaction product of:
- an isocyanate;
- a (meth)acrylate-containing alcohol having at least one (meth)acrylate group and at least one alcohol group;
- and
- a polyol component having a defined solubility parameter of less than about 10;
- a reactive oligomer comprising a multifunctional (meth)acrylate;
- and
- a photoinitiator,
- wherein when the composition is laminated to glass and UV radiated, the composition has a peel adhesion to the glass of about 2 Newtons per centimeter or less.
A laminate comprising:
- a substrate having at least one major surface;
- glass substrate having at least one major surface;
- and
- a pressure sensitive adhesive comprising:
- a polyurethane polymer which is a reaction product of:
- an isocyanate;
- a (meth) acrylate-containing alcohol having at least one (meth)acrylate group and at least one alcohol group;
- and
- a polyol component having a defined solubility parameter of less than about 10;
- a reactive oligomer comprising a multifunctional (meth) acrylate;
- and
- a photoinitiator,
- wherein after exposure to light radiation, the pressure sensitive adhesive has a peel adhesion to the glass of about 2 Newtons per centimeter or less.
Dependencies are inferred from the claim text.