US4370387A
Expired / Lapsed
US
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Pre-coated steel sheets and process for production thereof
Assignee: Toagosei Co Ltd
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Filing: 1981-03-19
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Granted: 1983-01-25
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Expires: 2001-03-19
Abstract
Abstract A precoated steel sheet and a process for production thereof is provided which comprises coating a resin composition comprising mainly an acryloxyloxy- or methacryloyloxy-terminated polyester on the surface of a steel sheet, said acryloyloxy- or methacryloyloxy-terminated polyester being prepared by reacting a hydroxy-terminated polyester comprising (a) a dicarboxylic acid unit containing about 10 to about 80 mol % of a terephthalic acid unit and (b) dihydric alcohol unit containing about 30 mol % or more of a dihydric alcohol unit containing 3 or more carbon atoms, and having a number average molecular weight of about 400 to about 5,000, with acrylic acid or methacrylic acid, and curing the thus-coated resin composition by irradiating the sheet with an electron beam.
Inventors
- 👤 Nagaharu Ueno
- 👤 Joji Oka
- 👤 Hidejiro Asano
- 👤 Takahisa Ogasawara
- 👤 Kiyokazu Mizutani
- 👤 Yoshiitsu Tominaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:31
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0485; C08F299/0492; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/47; C09; C09D; C09D167/00; C09D167/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
114 words
A process for producing a pre-coated steel sheet which comprises coating a resin composition comprising mainly an acryloyloxy- or methacryloyloxy-terminated polyester on the surface of a steel sheet, said acryloyloxy- or methacryloyloxy-terminated polyester being prepared by reacting a hydroxy-terminated polyester comprising (a) a dicarboxylic acid unit containing about 10 to about 80 mol% of a terephthalic acid unit and (b) a dihydric alcohol unit containing about 30 mol% or more of a dihydric alcohol unit containing 3 or more carbon atoms, and having a number average molecular weight of about 400 to about 5,000, with acrylic acid or methacrylic acid, and curing the thus-coated resin composition by irradiating the sheet with an electron beam.
Claim 2
Dependent Claim
114 words
A process for producing a pre-coated steel sheet which comprises coating a resin composition comprising mainly an acryloyloxy- or methacryloyloxy-terminated polyester on the surface of a steel sheet, said acryloyloxy- or methacryloyloxy-terminated polyester being prepared by reacting a hydroxy-terminated polyester comprising (a) a dicarboxylic acid unit containing about 10 to about 80 mol% of a terephthalic acid unit and (b) a dihydric alcohol unit containing about 30 mol% or more of a dihydric alcohol unit containing 3 or more carbon atoms, and having a number average molecular weight of about 400 to about 5,000, with acrylic acid or methacrylic acid, and curing the thus-coated resin composition by irradiating the sheet with an electron beam.
Claim 3
Dependent Claim
58 words
The process as in claim 1, wherein the dicarboxylic acid unit (a) comprises about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit or a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 4
Dependent Claim
113 words
The process as in claim 1, wherein the dicarboxylic acid unit (a) comprises about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit, the molar ratio of the isophthalic acid unit to the terephthalic acid unit is about 0.3:1 to about 3:1, and the molar ratio of the saturated dicarboxylic acid unit containing 4 or more carbon atoms to the total amount of the terephthalic acid unit and the isophthalic acid unit is about 1/9:1 to about 1:1.
Claim 5
Dependent Claim
58 words
The process as in claim 1, wherein the dicarboxylic acid unit (a) comprises about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 6
Dependent Claim
22 words
A process as in claim 1, 2, 3, or 4 wherein the acryloyloxy-terminated polyester has a viscosity of at least 100 cps.
Claim 7
Dependent Claim
21 words
A process as in claim 1, 2 or 4 wherein the acryloyloxy-terminated polyester has a viscosity of at least 500 cps.
Claim 8
Dependent Claim
60 words
The process as in claim 1, wherein the dicarboxylic acid units (a) consists essentially of about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit or a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 9
Dependent Claim
60 words
The process as in claim 1, wherein the dicarboxylic acid unit (a) consists essentially of about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 10
Dependent Claim
115 words
The process as in claim 1, wherein the dicarboxylic acid unit (a) consist essentially of about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit, the molar ratio of the isophthalic acid unit to the terephthalic acid unit is about 0.3:1 to about 3:1, and the molar ratio of the saturated dicarboxylic acid unit containing 4 or more carbon atoms to the total amount of the terephthalic acid unit and the isophthalic acid unit is about 1/9:1 to about 1:1.
Claim 11
Dependent Claim
110 words
A pre-coated steel sheet produced by coating a resin composition comprising mainly an acryloyloxy- or methacryloyloxy-terminated polyester on the surface of a steel sheet, said acryloxy- or methacryloyloxy-terminated polyester being prepared by reacting a hydroxy-terminated polyester comprising (a) a dicarboxylic acid unit containing about 10 to about 80 mol% of a terephthalic acid unit and (b) a dihydric alcohol unit containing about 30 mol% or more of a dihydric alcohol unit containing 3 or more carbon atoms, and having a number average molecular weight of about 400 to about 5,000, with acrylic acid or methacrylic acid, and curing the thus-coated resin composition by irradiating the sheet with an electron beam.
Claim 12
Dependent Claim
110 words
A pre-coated steel sheet produced by coating a resin composition comprising mainly an acryloyloxy- or methacryloyloxy-terminated polyester on the surface of a steel sheet, said acryloxy- or methacryloyloxy-terminated polyester being prepared by reacting a hydroxy-terminated polyester comprising (a) a dicarboxylic acid unit containing about 10 to about 80 mol% of a terephthalic acid unit and (b) a dihydric alcohol unit containing about 30 mol% or more of a dihydric alcohol unit containing 3 or more carbon atoms, and having a number average molecular weight of about 400 to about 5,000, with acrylic acid or methacrylic acid, and curing the thus-coated resin composition by irradiating the sheet with an electron beam.
Claim 13
Dependent Claim
60 words
A pre-coated steel sheet as in claim 10, wherein the dicarboxylic acid unit (a) comprises about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and/or a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 14
Dependent Claim
115 words
A pre-coated steel sheet as in claim 10, wherein the dicarboxylic acid unit (a) comprises about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit, the molar ratio of the isophthalic acid unit to the terephthalic acid unit is about 0.3:1 to about 3:1, and the molar ratio of the saturated dicarboxylic acid unit containing 4 or more carbon atoms to the total amount of the terephthalic acid unit and the isophthalic acid unit is about 1/9:1 to about 1:1.
Claim 15
Dependent Claim
60 words
A pre-coated steel sheet as in claim 10, wherein the dicarboxylic acid unit (a) comprises about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 16
Dependent Claim
23 words
A pre-coated sheet as in claim 10, 11, 12, or 13 wherein the acryloyloxy-terminated polyester has a viscosity of at least 100 cps.
Claim 17
Dependent Claim
23 words
A pre-coated sheet as in claim 10, 11, 12, or 13 wherein the acryloyloxy-terminated polyester has a viscosity of at least 500 cps.
Claim 18
Dependent Claim
73 words
A pre-coated steel sheet as in claim 10, wherein the dicarboxylic acid unit (a) consists essentially of about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit or a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 19
Dependent Claim
62 words
A precoated steel sheet as in claim 10, wherein the dicarboxylic acid unit (a) consists essentially of about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit containing 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit.
Claim 20
Dependent Claim
117 words
A pre-coated steel sheet as in claim 10, wherein the dicarboxylic acid unit (a) consists essentially of about 10 to about 80 mol% of a terephthalic acid unit, about 10 to about 80 mol% of an isophthalic acid unit and a saturated dicarboxylic acid unit contining 4 or more carbon atoms, and 0 to about 50 mol% of another dicarboxylic acid unit, the molar ratio of the isophthalic acid unit to the terephthalic acid unit is about 0.3:1 to about 3:1, and the molar ratio of the saturated dicarboxylic acid unit containing 4 or more carbon atoms to the total amount of the terephthalic acid unit and the isophthalic acid unit is about 1/9:1 to about 1:1.
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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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |