UV Curable compositions and substrates treated therewith

• US 4,367,251 A
• Filed: 11/12/1981
• Issued: 01/04/1983
• Est. Priority Date: 04/21/1980
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Crivello, James V.
• Primary Examiner(s): Robinson, Ellis P.
• Application Number:
  US06/320,366
• Time in Patent Office: 418 Days
• Field of Search: 528/89, 528/90, 528/91, 528/92, 528/408, 528/409, 528/410, 528/411, 528/412, 528/416, 528/361, 525/507, 204/159.11, 428/411, 428/413, 428/513, 428/42, 428/537, 428/40, 428/41, 428/352
• US Class Current: 428/40.9
• CPC Class Codes: C08G 59/145 Compounds containing one epoxy group
• CPC Class Codes: C08G 59/36 together with mono-epoxy compounds
• CPC Class Codes: C08G 59/68 characterised by the catalysts used
• CPC Class Codes: C08G 65/105 Onium compounds
• CPC Class Codes: C09J 2400/283 in the substrate
• CPC Class Codes: C09J 2463/005 in the release coating
• CPC Class Codes: C09J 7/401 characterised by the release coating composition
• CPC Class Codes: D21H 19/16 comprising curable or polymerisable compounds D21H19/24 takes precedence
• CPC Class Codes: D21H 27/001 Release paper
• CPC Class Codes: Y10T 428/1438 Metal containing
• CPC Class Codes: Y10T 428/2839 with release or antistick coating
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]
• CPC Class Codes: Y10T 428/31511 Of epoxy ether
• CPC Class Codes: Y10T 428/31902 Monoethylenically unsaturated

Abstract

UV curable mixtures of C.sub.(8-28) α-olefin oxides and certain onium salt photoinitiators, for example, certain diaryliodonium salts, or triarylsulfonium salts, and optionally polyfunctional epoxy resin, have been found useful in paper release coating applications.

Claims

1. A paper substrate having at least a major portion of its surface treated with a cured mixture of 100 to 19% by weight of a C.sub.(8-28) α

-olefin oxide and correspondingly from 0 to 81% by weight of a polyfunctional epoxy resin based on the use of an effective amount of an arylonium salt of the formula,

space="preserve" listing-type="equation">[Y].sup.+ [MQ.sub.n ].sup.-

where Y is a member selected from

space="preserve" listing-type="equation">[(R).sub.a (R.sup.1).sub.b I] and

space="preserve" listing-type="equation">[(R).sub.c (R.sup.2).sub.d (R.sup.3).sub.e S],

where R is a monovalent aromatic organic radical, R¹ is a divalent aromatic organic radical, R² is a monovalent organic aliphatic radical selected from alkyl, cyclo alkyl and substituted alkyl, R³ is a polyvalent organic radical forming a heterocyclic or fused ring structure, M is a metal or metalloid, Q is a halogen radical, a is a whole number equal to 0 or 2, b is a whole number equal to 0 or 1, and the sum of a+b is equal to 1 or 2, c is a whole number equal to 0 to 3 inclusive, d is a whole number equal to 0 or 1, e is a whole number equal to 0 to 1, and the sum of c, d and e is equal to 1 to 3 inclusive, and n is an integer equal to 4-6 inclusive.

2. A paper substrate in accordance with claim 1, where the polyfunctional epoxy resin is 3,4-epoxycyclohexylmethyl-3'"'"',4'"'"'-epoxycyclohexane carboxylate.

3. A paper substrate in accordance with claim 1, where a mixture of C.sub.(8-28) α

-olefin oxides is used.

4. A composite structure of a pressure sensitive adhesive tape or label in contact with a paper substrate treated with a paper release coating comprising a cured mixture of 100 to 19% by weight of a C.sub.(8-28) α

-olefin oxide and correspondingly from 0 to 81% by weight of a polyfunctional epoxy resin based on the use of an effective amount of an arylonium salt of the formula,

space="preserve" listing-type="equation">[Y].sup.+ [MQ.sub.n ].sup.-

where Y is a member selected from

space="preserve" listing-type="equation">[(R).sub.a (R.sup.1).sub.b I] and

space="preserve" listing-type="equation">[(R).sub.c (R.sup.2).sub.d (R.sup.3).sub.e S],

where R is a monovalent aromatic organic radical, R¹ is a divalent aromatic organic radical, R² is a monovalent organic aliphatic radical selected from alkyl, cyclo alkyl and substituted alkyl, R³ is a polyvalent organic radical forming a heterocyclic or fused ring structure, M is a metal or metalloid, Q is a halogen radical, a is a whole number equal to 0 or 2, b is a whole number equal to 0 or 1, and the sum of a+b is equal to 1 or 2, c is a whole number equal to 0 to 3 inclusive, d is a whole number equal to 0 or 1, e is a whole number equal to 0 or 1, and the sum of c, d and e is equal to 1 to 3 inclusive, and n is an integer equal to 4-6 inclusive.

5. A composite structure in accordance with claim 4, where the epoxy resin is 3,4-epoxycyclohexylmethyl-3'"'"',4'"'"'-epoxycyclohexane carboxylate.

6. A composite structure in accordance with claim 4, where the C.sub.(8-28) α

-olefin oxide is a mixture of C₁₅ -C₁₈ α

-olefin oxides.