Coating agent, decorative film, and article

Patent metadata

Field	Value
Publication number	US-10184072-B2
Application number	US-201515527315-A
Country	US
Kind code	B2
Filing date	Nov 13, 2015
Priority date	Nov 17, 2014
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

An object of the present invention is to provide a coating agent giving a coating film that has good adhesion and stability over time, a decorative film having at least one layer formed from the coating agent; and an article decorated with the decorative film. The coating agent of the present invention contains, in a specific ratio, an olefin polymer (A) having a heat of fusion of in the range of 0 to 50 J/g and having a weight average molecular weight (Mw) as measured by GPC of 1×104 to 1000×104, a hydrocarbon-based synthetic oil (B) having a 40° C. kinematic viscosity of 30 to 500,000 cSt, and a tackifier (C) having an acid value of 10 or more and having a weight average molecular weight (Mw) of 0.9×103 to 3×103.

First claim

The invention claimed is:

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.

Assignees

• Mitsui Chemicals Inc

Inventors

• Hirota Yoshihito
• Itou Yuichi

Classifications

• C09J175/04

  Polyurethanes · CPC title

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• B32B27/00

  Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)} · CPC title

• C09D123/00 Primary

  Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers · CPC title

• C09D123/10

  Homopolymers or copolymers of propene · CPC title