US4659788A
Expired / Lapsed
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Radiation curable adhesive composition for surface protective film
Assignee: Resonac Corp
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Filing: 1985-04-01
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Granted: 1987-04-21
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Expires: 2005-04-01
Abstract
Abstract A radiation curable adhesive composition comprising a liquid oligomer, a chain transfer agent, and an N-methyl compound can give a surface protective film which is slightly influenced in adhesive strength with the lapse of time, and excellent in weather resistance and heat resistance.
Inventors
- 👤 Tomohisa Ohta
- 👤 Akihiko Dobashi
- 👤 Hisashige Kanbara
- 👤 Yasuyuki Seki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
C; C08; C08F; C08F290/00; C08F290/08; C08F290/12; C09; C09J; C09J133/00; C09J133/04; C09J133/06; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L61/00; C08L61/20; C08L61/32; Y; Y10; Y10S; Y10S525/00; Y10S525/91; Y10S525/92; Y10S525/921
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A radiation curable adhesive composition for surface protective films which consists essentially of 100 parts by weight of an acrylic liquid oligomer having one or more acryloyl double bonds at terminal groups or side chains in its molecule, 0.2 to 20 parts by weight of a chain transfer agent selected from the group consisting of a thiol compound, a disulfide and a halide, and 0.2 to 20 parts by weight of an N-methylol compound selected from the group consisting of compounds having two or more methylol groups or alkyl etherified methylol groups in its molecule; said acrylic liquid oligomer having an acrylic acid alkyl ester or a methacrylic acid alkyl ester as a main chain.
Claim 2
Dependent Claim
115 words
A radiation curable adhesive composition for surface protective films which consists essentially of 100 parts by weight of an acrylic liquid oligomer having one or more acryloyl double bonds at terminal groups or side chains in its molecule, 0.2 to 20 parts by weight of a chain transfer agent selected from the group consisting of a thiol compound, a disulfide and a halide, and 0.2 to 20 parts by weight of an N-methylol compound selected from the group consisting of compounds having two or more methylol groups or alkyl etherified methylol groups in its molecule; said acrylic liquid oligomer having an acrylic acid alkyl ester or a methacrylic acid alkyl ester as a main chain.
Claim 3
Dependent Claim
35 words
A composition according to claim 1, wherein the N-methylol compound is selected from the group consisting of amino resin precondensates having two or more N-methylol groups and alkyl etherified products of these amino resin precondensates.
Claim 4
Dependent Claim
29 words
A composition according to claim 2, wherein the amino resin precondensate is a melamine-formaldehyde resin precondensate, a urea-formaldehyde resin precondensate, a thiourea-formaldehyle resin precondensate, or an aniline-formaldehyde resin precondensate.
Claim 5
Dependent Claim
40 words
A composition according to claim 1, wherein the chain transfer agent is a thiol compound, or a halide, and the N-methylol compound is a melamine-formaldehyde resin precondensate having two or more methylol groups or an alkyl etherified melamine-formaldehyde resin precondensate.
Claim 6
Dependent Claim
26 words
A composition according to claim 1, wherein said acrylic liquid oligomer has a viscosity ranging from 10 2 cps to 5×10 5 cps at room temperature.
Claim 7
Dependent Claim
13 words
A composition according to claim 5, wherein said composition is free of solvent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |