Method for modifying the surface of polymer materials

• US 4,698,388 A
• Filed: 02/18/1986
• Issued: 10/06/1987
• Est. Priority Date: 04/30/1983
• Status: Expired due to Term

• Current Assignee: NOF Corporation
• Original Assignee: NOF Corporation
• Inventors: Yamamoto, Takashi, Nakayama, Masaharu, Ohmura, Hiroshi, Oshibe, Yoshihiro
• Primary Examiner(s): Kight, John
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/829,934
• Time in Patent Office: 595 Days
• Field of Search: 525/95, 525/54.44, 428/420, 8/115.6
• US Class Current: 525/88
• CPC Class Codes: C08F 293/00 Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule on to polymers modified by introduction of unsaturated end groups C08F290/02
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 2555/40 Mixtures based upon bitumen or asphalt containing functional additives
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: Y10S 260/17 High polymeric, resinous, antistatic agents
• CPC Class Codes: Y10S 260/18 High polymeric, resinous, antistatic agents containing pentavalent nitrogen
• CPC Class Codes: Y10T 428/31536 Including interfacial reaction product of adjacent layers

Abstract

The surface of a polymer material is modified by adding to the material a block copolymer. The block copolymer has a hydrophilic polymer portion and a polymer portion which is compatible with the polymer material to be modified. The block copolymer can be easily synthesized in the presence of a polymeric peroxide and can easily and permanently modify the surface of the polymer material.

Claims

1. A method for modifying the surface of a natural polymer material, comprising adding a block copolymer consisting of a polymer portion compatible with the natural polymer material and a hydrophilic polymer portion to the natural polymer material,

said block copolymer having been produced through the following first and second steps,

in the first step, either a vinyl monomer which forms a hydrophilic polymer, or a vinyl monomer which forms a polymer compatible with the polymer material, is polymerized in the presence of a polymeric peroxide as a polymerization initiator to produce a peroxy bond containing polymer, and

in the second step, either a vinyl monomer which forms a hydrophilic polymer, or a vinyl monomer which forms a polymer compatible with the natural polymer material, both the vinyl monomers being used in such a manner that, when a hydrophilic polymer is produced in the first step, a vinyl monomer which forms a polymer compatible with the natural polymer material is used in the second step, and when a polymer compatible with the natural polymer material is produced in the first step, a vinyl monomer which forms a hydrophilic polymer is used in the second step, is polymerized in the presence of a polymerization initiator of the peroxy bond- or azo bond-containing natural polymer obtained in the first step.

2. A method according to claim 1, wherein said natural polymer material is resin, fiber or rubber.

3. A method according to claim 1, wherein said natural polymer material is resin, natural rubber, cotton, linen, wool or silk.