US4698388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for modifying the surface of polymer materials
Assignee: NOF Corp
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Filing: 1986-02-18
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Granted: 1987-10-06
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Expires: 2006-02-18
Abstract
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.
Inventors
- 👤 Hiroshi Ohmura
- 👤 Yoshihiro Oshibe
- 👤 Masaharu Nakayama
- 👤 Takashi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:39
CPC Classifications
C; C08; C08L; C08L53/00; C08F; C08F293/00; C08L101/00; C08L23/00; C08L23/02; C08L2555/00; C08L2555/40; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17; Y10S260/18; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
217 words
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.
Claim 2
Independent Claim
217 words
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.
Claim 3
Dependent Claim
16 words
A method according to claim 1, wherein said natural polymer material is resin, fiber or rubber.
Claim 4
Dependent Claim
20 words
A method according to claim 1, wherein said natural polymer material is resin, natural rubber, cotton, linen, wool or silk.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |