Radiation sterilization resistant adhesive

1. A medical member for skin application comprising:

an adhesive agent layer resistant to radiation sterilization, the adhesive agent layer comprising:

a (meth)acrylic polymer having one or more UV crosslinkable site selected from a benzophenone group, a benzyl group, an o-benzoylbenzoate group, a thioxanthone group, a 3-ketocoumarin group, a 2-ethylanthraquinone group, and a camphor quinone group; and

a wettability stabilizer, wherein the wettability stabilizer is selected from a rosin ester resin, a terpene phenol resin, and hydrides thereof.

2. The medical member of claim 1 , further comprising:

a medical implement.

3. The medical member of claim 2 , wherein the medical implement is at least one selected from a backing, dosing equipment, communication equipment, testing equipment, and protective equipment.

4. The medical member of claim 1 , wherein the wettability stabilizer is selected from a terpene phenol resin and a hydride thereof.

5. The medical member of claim 1 , wherein the wettability stabilizer is present in an amount from 15 to 60 mass % with respect to the weight of the adhesive agent layer.

6. The medical member of claim 1 , wherein the adhesive agent layer is a hot melt adhesive.

7. The medical member of claim 1 , wherein a thickness of the adhesive agent layer is from 10 to 300 μm.

8. The medical member of claim 1 , the (meth)acrylic polymer derived from:

one or more C 1-20 alkyl (meth)acrylate monomer represented by one of formulae:

CH 2 ═CH—COO—R 1 or CH 2 ═C(CH 3 )—COO—R 1 ,

wherein: R 1 is a linear, branched, or cyclic alkyl group having from 1 to 20 carbon atoms;

one or more polar unsaturated monomer having a polar group and a vinylcarbonyl group characterized by a formula:

CH 2 ═CH—C(═O)—; and

one or more (meth)acrylate monomer having a UV crosslinkable group selected from a benzophenone, a benzyl, an o-benzoylbenzoate, a thioxanthone, a 3-ketocoumarin, a 2-ethylanthraquinone, and a camphor quinone.

9. The medical member of claim 8 , the one or more C 1-20 alkyl (meth)acrylate monomer selected from methyl (meth)acrylate, ethyl (meth)acrylate, n-butyl (meth)acrylate, hexyl (meth)acrylate, n-octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, and dicyclopentanyl (meth)acrylate.

10. The medical member of claim 8 , the one or more polar unsaturated monomer selected from:

a hydroxyl group-containing unsaturated monomer selected from 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, polyethylene glycol (meth)acrylate, and polypropylene glycol (meth)acrylate;

a carboxyl group-containing unsaturated monomer selected from acrylic acid, itaconic acid, maleic acid, and fumaric acid;

a carbamoyl group-containing unsaturated monomer selected from acrylamide;

an amino group-containing monomer selected from N,N-dimethylaminoethyl (meth)acrylate, N,N-diethylaminoethyl (meth)acrylate, and N,N-dimethylaminopropyl (meth)acrylate; and

an epoxy group-containing unsaturated monomer selected from glycidyl (meth)acrylate.

11. The medical member of claim 8 , the one or more (meth)acrylate monomer having a UV crosslinkable group selected from 4-acryloyloxybenzophenone, 4-acryloyloxyethoxybenzophenone, 4-acryloyloxy-4′-methoxybenzophenone, 4-acryloyloxyethoxy-4′-methoxybenzophenone, 4-acryloyloxy-4′-bromobenzophenone, 4-acryloyloxyethoxy-4′-bromobenzophenone, 4-methacryloyloxybenzophenone, 4-methacryloyloxyethoxybenzophenone, 4-methacryloyloxy-4′-methoxybenzophenone, 4-methacryloyloxyethoxy-4′-methoxybenzophenone, 4-methacryloyloxy-4′-bromobenzophenone, and 4-methacryloyloxyethoxy-4′-bromobenzophenone.

12. The medical member of claim 8 , the (meth)acrylic polymer derived from 2-ethylhexyl acrylate, acrylic acid, and acryloxybenzophenone.

13. The medical member of claim 12 , the 2-ethylhexyl acrylate, acrylic acid, and acryloxybenzophenone present in a weight ratio of 96.5:3.5:0.5.