Wire coating composition

• US 4,455,348 A
• Filed: 07/27/1983
• Issued: 06/19/1984
• Est. Priority Date: 07/14/1981
• Status: Expired due to Fees

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Pokorny, Richard J.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): BUFFALOW, EDITH
• Application Number:
  US06/517,768
• Time in Patent Office: 328 Days
• Field of Search: 428/500, 428/412, 428/457, 428/37, 428/537, 428/461, 428/512, 428/511, 428/516, 428/379
• US Class Current: 428/377
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 35/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
• CPC Class Codes: H01B 7/282 Preventing penetration of fluid , e.g. water or humidity, into conductor or cable
• CPC Class Codes: H01R 13/03 characterised by the material, e.g. plating, or coating materials
• CPC Class Codes: Y10T 428/2936 Wound or wrapped core or coating [i.e., spiral or helical]
• CPC Class Codes: Y10T 428/294 including metal or compound thereof [excluding glass, ceramic and asbestos]
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31692 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31895 Paper or wood
• CPC Class Codes: Y10T 428/31899 Addition polymer of hydrocarbon[s] only
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer

Abstract

An insulative coating composition for providing water-repellancy to and protecting communication wire comprises an admixture of an anhydride copolymer, a flexibilizing copolymer, a suitable solvent system, a hydrophobic, soluble, compatible fluoroaliphatic radical-containing composition and optionally, a mercaptan, and optionally, an antioxidant. Articles coated with the insulative composition are disclosed.

Claims

1. An article comprising a substrate having a composition coated on at least one surface thereof, said composition comprising an admixture of:

a. 35 to 70 weight percent of an anhydride copolymer which is the reaction product of;

(1) an alkyl or aryl substituted or unsubstituted unsaturated cyclic anhydride wherein each alkyl group contains up to 6 C atoms and the cyclic group contains 4 to 15 C atoms, and

(2) an unsaturated C₁₀ to C₂₄ aliphatic hydrocarbon;

b. 10 to 41 weight percent of a compatible, flexibilizing polymer which is selected from polyisobutylene and polymers of ethylene copolymerized with vinyl acetate, acrylate esters, methacrylate esters, and alpha-olefins, and

c. 10 to 40 weight percent of a hydrophobic, compatible, fluoroaliphatic radical-containing composition, said fluoroaliphatic radical being a monovalent, fluorinated, aliphatic radical having 5 to 14 carbon atoms which can be interrupted by divalent O atoms or trivalent N atoms bonded to C atoms;

said fluoroaliphatic radical-containing composition being capable of providing water-repellancy to said admixture, and

d. up to 10 weight percent of a mercaptan compound.

2. The article according to claim 1 wherein said coating composition further comprises an amount of an antioxidant sufficient to prevent oxidation of said composition.

3. The article according to claim 1 wherein said substrate is paper, polyethylene, polycarbonate, or metal.

4. The article according to claim 1 prepared by providing said substrate with said composition by means of spraying, dipping, or brushing.

5. An article according to claim 1 wherein said article is an electrical wire.

6. An article according to claim 5 wherein said wire is polyethylene insulated.

7. An article according to claim 5 wherein said wire is paper insulated.

8. An article according to claim 7 wherein said paper insulation is spiral-wrapped.