Agent and method for treating the surfaces of metals

• US 5,288,341 A
• Filed: 09/11/1992
• Issued: 02/22/1994
• Est. Priority Date: 10/30/1991
• Status: Expired due to Term

• Current Assignee: GC Corporation (General Cannabis Corp.)
• Original Assignee: GC Corporation (General Cannabis Corp.)
• Inventors: Kojima, Katsunori, Sakuma, Tetsuro, Imai, Yohji
• Primary Examiner(s): Silverberg, Sam
• Application Number:
  US07/943,676
• Time in Patent Office: 529 Days
• Field of Search: 156/315, 156/314, 156/316, 148/248, 148/250
• US Class Current: 148/248
• CPC Class Codes: C07F 9/20 containing P-halide groups
• CPC Class Codes: C08F 230/00 Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal metal salts, e.g. phenolates or alcoholates, see the parent compounds
• CPC Class Codes: C08F 30/02 containing phosphorus
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16

Abstract

An agent is characterized by containing a polymerizable monomer having a thiophosphoric acid dichloride group. By applying this agent to the surfaces of noble metals, much more durable and increased bond strength is obtained.

Claims

1. A method for treating the surface of a metal, comprising applying on the surface of a metal an agent comprising a polymerizable monomer comprising 0.001 to 10% by weight of a thiophosphoric acid dichloride group of the formula (I) or (II):

##STR3## n is an integer of from 1-16, wherein said agent is dissolved in an organic solvent.

2. The method according to claim 1, wherein said method further comprises the step of removing excess agent.

3. The method according to claim 1, wherein said agent further comprises of water and 2 molar equivalents or less, based on said polymerizable monomer, of tertiary amine.

4. The method according to claim 3, wherein said method further comprises removing excess agent.