Reactive hot-melt adhesive composition
A reactive hot-melt adhesive composition of the present technology is moisture curable and contains: a urethane prepolymer having an isocyanate group; a (meth)acrylic resin; and a liquid polymer containing (meth)acryloyloxy groups and/or isocyanate groups.
1. A reactive hot-melt adhesive composition that is moisture curable,
the reactive hot-melt adhesive composition comprising:
a urethane prepolymer having an isocyanate group;
a (meth)acrylic resin; and
a liquid polymer containing (meth)acryloyloxy groups.
2. The reactive hot-melt adhesive composition according to claim 1 , wherein an amount of the liquid polymer is from 1 to 5 parts by mass per 100 parts by mass total of the (meth)acrylic resin and a polyol and a polyisocyanate that are used in production of the urethane prepolymer.
3. The reactive hot-melt adhesive composition according to claim 1 , wherein the urethane prepolymer is a compound produced by reacting at least one selected from the group consisting of bifunctional polyols and trifunctional polyols with polyisocyanate; and
the bifunctional polyol is at least one type selected from the group consisting of polyoxypropylene diols, polyoxyethylene diols, and castor oil-based polyols.
4. The reactive hot-melt adhesive composition according to claim 3 , wherein a weight average molecular weight of the trifunctional polyol is 5,000 or greater.
5. The reactive hot-melt adhesive composition according to claim 4 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.
6. The reactive hot-melt adhesive composition according to claim 3 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.
7. The reactive hot-melt adhesive composition according to claim 2 , wherein the urethane prepolymer is a compound produced by reacting at least one selected from the group consisting of bifunctional polyols and trifunctional polyols with polyisocyanate; and
the bifunctional polyol is at least one type selected from the group consisting of polyoxypropylene diols, polyoxyethylene diols, and castor oil-based polyols.
8. The reactive hot-melt adhesive composition according to claim 7 , wherein a weight average molecular weight of the trifunctional polyol is 5,000 or greater.
9. The reactive hot-melt adhesive composition according to claim 8 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.
10. The reactive hot-melt adhesive composition according to claim 7 , wherein an amount of the trifunctional polyol is from 5 to 50 mass % relative to a total amount of polyol used in production of the urethane prepolymer.
11. The reactive hot-melt adhesive composition according to claim 1 , wherein the liquid polymer further contains isocyanate groups.