Adhesive sheet for preventing aquatic growths and method for preventing aquatic growths

• US 4,814,227 A
• Filed: 08/19/1986
• Issued: 03/21/1989
• Est. Priority Date: 08/19/1985
• Status: Expired due to Term

• Current Assignee: Nichiban Company Limited
• Original Assignee: Nichiban Company Limited
• Inventors: Sato, Hiroo, Yamada, Takafumi, Maeda, Kunio, Nakata, Terumi, Kitazaki, Yasuaki, Miyasaka, Hiroyasu
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Katz, M. A.
• Application Number:
  US06/897,912
• Time in Patent Office: 945 Days
• Field of Search: 428/907, 428/353, 428/462, 428/416, 428/418, 156/71, 156/233
• US Class Current: 428/353
• CPC Class Codes: B63B 59/04 Preventing hull fouling anti-fouling paints C09D5/16
• CPC Class Codes: C09J 2301/302 the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2407/00 Presence of natural rubber
• CPC Class Codes: C09J 2409/00 Presence of diene rubber
• CPC Class Codes: C09J 2409/003 in the primer coating
• CPC Class Codes: C09J 2415/003 in the primer coating
• CPC Class Codes: C09J 2421/003 in the primer coating
• CPC Class Codes: C09J 2463/003 in the primer coating
• CPC Class Codes: C09J 7/28 Metal sheet metallised plastics C09J7/22
• CPC Class Codes: C09J 7/50 characterised by a primer layer between the carrier and the adhesive
• CPC Class Codes: Y10S 428/907 Resistant against plant or animal attack
• CPC Class Codes: Y10T 428/2804 Next to metal
• CPC Class Codes: Y10T 428/2843 including a primer layer
• CPC Class Codes: Y10T 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/31522 Next to metal

Abstract

To prevent the growth of aquatic animals and plants on the surfaces of underwater structures, the surfaces are covered with a protective adhesive sheet comprised of a copper-nickel alloy plate having a weight ratio of copper:nickel in the range of 100:0 to 80:20, a primer layer formed on the alloy plate, and a pressure-sensitive adhesive layer formed on the primer layer. Prior to applied the adhesive sheet, the surface to be protected is preferably cleaned and coated with a primer of the same composition as that of the primer layer of the adhesive sheet.

Claims

1. An adhesive sheet suitable for application to a surface for preventing aquatic growths, comprising:

a copper or copper-nickel alloy plate having a weight ratio of copper;

nickel in the range of 100;

0 to 80;

20;

a primer layer formed on a major surface of the plate; and

a pressure-sensitive adhesive layer formed on the primer layer;

wherein the pressure-sensitive layer is composed of elastomer, tackifier resin, filler and cross-linking agent;

wherein the primer layer comprises elastomer, tackifier resin, epoxy resin and epoxy resin curing agent, wherein the primer layer includes at least one elastomer selected from the group consisting of modified natural rubber, styrene-butadiene rubber, nitrile rubber and chlorinated rubber and wherein the primer layer comprises 100 parts by weight of elastomer, 20-300 parts by weight of tackifier resin, 30-200 parts by weight of epoxy resin and an epoxy equivalent curing agent.

2. An adhesive sheet according to claim 1;

wherein the primer layer contains an anti-degradation agent effective to resist degradation by copper.

3. An adhesive sheet according to claim 1;

wherein the pressure-sensitive adhesive layer contains an antioxidant.

4. A method of preventing aquatic growths on an underwater surface, comprising:

applying a primer on a surface to be protected; and

adhering to the primered surface an adhesive sheet comprised of a copper-nickel alloy plate, a primer layer formed on the alloy plate, and a pressure-sensitive adhesive layer, formed on the primer layer, the adhesive sheet being adhered to the primered surface by the pressure-sensitive adhesive layer wherein the pressure-sensitive adhesive layer is composed of elastomer, tackifier resin, filler, and cross-linking agent, wherein the primer layer is composed of elastomer, tackifier resin, epoxy resin, and epoxy resin curing agent, and wherein the elastomer of the primer layer includes one or more elastomers selected from the group of modified natural rubber, styrene-budadiene rubber, nitrile rubber and chlorinated rubber.

5. A method according to claim 4;

wherein the primer applied to the surface to be protected and the primer layer of the adhesive sheet have the same composition.

6. A method according to claim 5;

wherein the primer layer contains an anti-degradation agent effective to resist degradation by copper.

7. An adhesive sheet suitable for application to a surface for preventing aquatic growths comprising:

a copper or copper-nickel alloy plate having a weight ratio of copper;

nickel in the range of 100;

0 to 80;

20;

a primer layer formed on a major surface of the plate; and

a pressure-sensitive adhesive layer formed on the primer layer;

wherein the pressure-sensitive layer is composed of elastomer, tackifier resin, filler and cross-linking agent, wherein the primer layer comprises elastomer, tackifier resin, epoxy resin and epoxy resin curing agent, wherein the primer layer includes at least one elastomer selected from the group consisting of modified natural rubber, a styrene-butadiene rubber, nitrile rubber and chlorinated rubber.

8. An adhesive sheet for application to a construction for preventing the fouling of the construction'"'"'s underwater surface by aquatic growths comprising:

a copper or a copper-nickel alloy plate having a weight ratio of copper;

nickel in the range of 100;

0 to 80;

20;

a primer layer formed on a surface of the plate; and

a pessure-sensitive adhesive layer formed on the primer layer;

wherein the primer layer comprises elastomer, tackifier resin, epoxy resin and epoxy resin curing agent,

wherein the primer layer includes at least one elastomer selected from the group consisting of modified natural rubber, styrene-butadiene rubber, nitrile rubber and chlorinated rubber, and

wherein the primer layer comprises 100 parts by weight of elastomer, 20-300 parts by weight of tackifier resin, 30-200 parts by weight of epoxy resin and an epoxy equivalent curing agent.

9. A method of preventing from fouling by aquatic growths the underwater surface of a construction comprising the steps of:

applying a primer layer on the underwater surface of the construction to be protected; and

adhering to the primer layer surface an adhesive sheet comprised of a copper or a copper-nickel alloy plate, a primer layer formed on the plate, and a pressure-sensitive adhesive layer formed on the primer layer, the adhesive sheet being adhered to the primer layer on the underwater surface to be protected by the pressure-sensitive adhesive layer,

wherein the primer layer is composed of 100 parts by weight of elastomer, 20-300 parts by weight of tackifier resin, 30-200 parts by weight of epoxy resin, and an epoxy equivalent curing agent, and

wherein the elastomer of the primer layer includes one or more elastomers selected from the group of modified natural rubber, styrene-butadiene rubber, nitrile rubber and chlorinated rubber.