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US4503198A Expired / Lapsed US ⏱️ 0.0 years remaining

Electron radiation curable resin

Assignee: Sony Corp
•
Filing: 1982-08-19
•
Granted: 1985-03-05
•
Expires: 2002-08-19
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Abstract

Abstract PCT No. PCT/JP82/00324 Sec. 371 Date Apr. 18, 1983 Sec. 102(e) Date Apr. 18, 1983 PCT Filed Aug. 19, 1982 PCT Pub. No. WO83/00696 PCT Pub. Date Mar. 3, 1983.The electron radiation curable resin of this invention is an oligopolyester-urethane resin having urethane bonds at both terminals of a polyester moiety, or a polyester-polyurethane resin wherein polyester moieties are chain-extended through urethane bonds. The resin has a molecular weight of about 1,000 to 50,000, and has a double bond at each terminal of the molecule and contains in the molecure about 0.2 to 30 mol % of carboxylic acid component having a metal sulfonate group based on the total carboxylic acid component. This electron radiation curable resin is suitable as a binder for a magnetic paint for producing magnetic recording medium such as magnetic tape, and can provide a magnetic recording medium having excellent dispersibility, durability, and solvent resistance.

Inventors

  • 👤 Seiichi Miyai
  • 👤 Kaoru Nakajima
  • 👤 Masashi Somezawa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 19:23
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7021; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4676; C08G18/67; C08G18/671; C08G18/672; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S525/00; Y10S525/92; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/31504; Y10T428/31551; Y10T428/31609

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 102 words
An electron radiation curable resin comprising an oligopolyester-urethane resin having urethane bonds at both terminals of its polyester moiety, or a polyester-polyurethane resin wherein its polyester moieties are chain-extended through urethane bonds, said resin having a molecular weight of about 1,000 to 50,000, having an acrylate or methacrylate group at each terminal of the molecule, and containing in the molecule about 0.2 to 30 mol% of carboxylic acid component having a metal sulfonate group based on the total carboxylic acid component, said metal sulfonate group being pendent from the polymer chain and constituting a portion of an aromatic or aliphatic dicarboxylic acid.
Claim 2
Dependent Claim 102 words
An electron radiation curable resin comprising an oligopolyester-urethane resin having urethane bonds at both terminals of its polyester moiety, or a polyester-polyurethane resin wherein its polyester moieties are chain-extended through urethane bonds, said resin having a molecular weight of about 1,000 to 50,000, having an acrylate or methacrylate group at each terminal of the molecule, and containing in the molecule about 0.2 to 30 mol% of carboxylic acid component having a metal sulfonate group based on the total carboxylic acid component, said metal sulfonate group being pendent from the polymer chain and constituting a portion of an aromatic or aliphatic dicarboxylic acid.
Claim 3
Dependent Claim 23 words
The electron radiation curable resin as claimed in claim 1, wherein the molecular weight of the oligopolyester-urethane resin is about 1,000 to 10,000.
Claim 4
Dependent Claim 23 words
The electron radiation curable resin as claimed in claim 1, wherein the molecular weight of the polyester-polyurethane resin is about 10,000 to 50,000.
Claim 5
Dependent Claim 21 words
The electron radiation curable resin as claimed in claim 1, wherein the metal sulfonate group is an alkali metal sulfonate group.
Claim 6
Dependent Claim 73 words
The electron radiation curable resin as claimed in claim 1 wherein the compound for introducing the double bonds to both terminals of the molecule is an acrylic monomer or methacrylic monomer having a hydroxyl group and a double bond at each terminal of the molecule, as represented by the following general formula: ##STR2## where R 1 is a hydrogen atom or methyl group, and R 2 is a substituted or unsubstituted alkylene group.

References Cited (Backward Citations)

US3509234A Cited
US3677920A Cited
US3641199A Cited
US4129641A Cited
US4072770A Cited
US4112017A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-03-04 1988-09-03 1989-03-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-03-04 1992-09-03 1993-03-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-03-04 1996-09-03 1997-03-05 $7700.00 Window Closed / Lapsed

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