Coating agent, decorative film, and article

1. A coating agent comprising

an olefin polymer (A) having a heat of fusion as measured in accordance with JIS K 7122 of in the range of 0 to 50 J/g and having a weight average molecular weight (Mw) as measured by GPC of 1×10 4 to 1000×10 4 ,

a hydrocarbon-based synthetic oil (B) having a 40° C. kinematic viscosity of 5,000 to 500,000 cSt,

a tackifier (C) having an acid value as determined according to JIS K 0070 of 10 or more and having a weight average molecular weight (Mw) as measured by GPC of 0.9×10 3 to 3×10 3 and;

a solvent;

wherein the olefin polymer (A) accounts for 30 to 88% by weight, the hydrocarbon-based synthetic oil (B) accounts for 30 to 6% by weight, and the tackifier (C) accounts for 40 to 6% by weight (provided that the total of (A), (B), and (C) is 100% by weight), and

wherein the olefin polymer (A) is at least one selected from the group consisting of (A1″), (A2″) and (A3″):

(A1″) a propylene-based polymer containing 50 to 100 mol % of structural units derived from propylene and 50 to 0 mol % of structural units derived from α-olefins having 2 to 20 carbon atoms excluding propylene (provided that the total of propylene and the structural units derived from α-olefins having 2 to 20 carbon atoms is 100 mol %);

(A2″) a modified olefin polymer obtained from a propylene-based polymer part or whole of which is graft-modified with a polar group-containing monomer, the propylene-based polymer containing 50 to 100 mol % of structural units derived from propylene and 50 to 0 mol % of structural units derived from α-olefins having 2 to 20 carbon atoms excluding propylene (provided that the total of propylene and the structural units derived from α-olefins having 2 to 20 carbon atoms is 100 mol %), wherein based on 100 parts by weight of the modified olefin polymer, 0.1 to 15 parts by weight of structural units derived from the polar group-containing monomer is contained; and

(A3″) a halogen-modified olefin polymer obtained from a propylene-based polymer part or whole of which is halogen-modified, the propylene-based polymer containing 50 to 100 mol % of structural units derived from propylene and 50 to 0 mol % of structural units derived from α-olefins having 2 to 20 carbon atoms excluding propylene (provided that the total of propylene and the structural units derived from α-olefins having 2 to 20 carbon atoms is 100 mol %), wherein based on 100 parts by weight of the halogen-modified olefin polymer, the halogen content is 2 to 40 parts by weight.

2. The coating agent according to claim 1 , wherein the polar group-containing monomer is at least one selected from unsaturated carboxylic acids and unsaturated carboxylic acid anhydrides.

3. The coating agent according to claim 1 , wherein the hydrocarbon-based synthetic oil (B) is a polymer of an olefin having 2 to 20 carbon atoms.

4. The coating agent according to claim 1 , wherein the tackifier (C) is a rosin ester or a derivative thereof.

5. The coating agent according to claim 1 , further comprising a curing agent (D).

6. The coating agent according to claim 5 , wherein the curing agent (D) is at least one selected from an aliphatic polyisocyanate and a multimer of aliphatic polyisocyanate.

7. The coating agent according to claim 1 , which is a primer.

8. The coating agent according to claim 1 , which is a coating material.

9. The coating agent according to claim 1 , which is a hot melt adhesive.

10. A decorative film having at least one layer formed from the coating agent according to claim 1 .

11. An article decorated with the decorative film according to claim 10 .

12. The article according to claim 11 , wherein the decoration is performed using a vacuum pressure forming machine.