US3676405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoset resins with hydroxy acrylate, methyl methacrylate and blocked isocyanate
Assignee: Ford Motor Co
•
Filing: 1970-06-05
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Granted: 1972-07-11
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Expires: 1990-06-05
Abstract
Abstract Novel thermosetting resin powders which can be molded to form products characterized in tensile measurement, by high elongation-to-break, high tensile strength and modulus and a high glass transition temperature are prepared from a mixture of (a) a prepolymer formed by reacting (1) hydroxy ester of acrylic or methacrylic acid and a C2 - C3 diol with (2) methyl methacrylate and (b) a blocked di- or triisocyanate wherein the isocyanate groups are directly attached to an aromatic ring and deblock at temperatures in the range of about 120* to 160* C.
Inventors
- 👤 Santokh S Labana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:03
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08G18/6262; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/8074; C08G2140/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
24 words
A molding powder in accordance with claim 1 wherein said copolymer contains between about 30 and about 36 weight percent of said mono-hydroxy ester.
Claim 2
Dependent Claim
26 words
A molding powder in accordance with claim 1 wherein said remainder consists essentially of a major amount of methyl methacrylate and a minor amount of methacrylonitrile.
Claim 3
Dependent Claim
41 words
A molding powder in accordance with claim 1 wherein said copolymer has average molecular weight in the range of about 6, 000 to about 12,000 with less than about 5 percent of the molecules thereof having molecular weight below about 1,000.
Claim 4
Dependent Claim
37 words
A molding powder in accordance with claim 1 which contains between about 1.0 and about 10.0 weight percent of a hydroxylated diluent having molecular weight below about 1,000 and at least two free hydroxyl groups per molecule.
Claim 5
Dependent Claim
29 words
A molding powder in accordance with claim 1 wherein said molding powder mix contains about 0.95 to about 1.05 blocked isocyanate groups for each hydroxy group in the same.
Claim 6
Dependent Claim
23 words
A molding powder in accordance with claim 1 wherein said isocyanate is selected from triphenyl dimethylene triisocyanate and 4,4'' - diphenyl methane diisocyanate.
Claim 7
Dependent Claim
15 words
A molding powder in accordance with claim 1 wherein said isocyanate is triphenyl dimethylene triisocyanate.
Claim 8
Dependent Claim
17 words
A molding powder in accordance with claim 1 wherein said isocyanate is 4,4'' - diphenyl methane diisocyanate.
Claim 9
Dependent Claim
104 words
A molding powder which comprises an intimate mixture of (a) a copolymer consisting essentially of about 25 to about 40 weight percent of a monohydroxy ester of a C2 - C3 diol and acrylic or methacrylic aCid and a remainder consisting essentially of a major proportion of methyl methacrylate and a minor proportion of methacrylo-nitrile or acrylonitrile and having average molecular weight in the range of about 3,000 to about 16,000, and (b) a caprolactam-blocked di- or tri- isocyanate, said isocyanate being present in sufficient quantity to provide about 0.90 to about 1.10 blocked isocyanate groups for each hydroxy group in said molding powder.
Claim 10
Dependent Claim
24 words
A molding powder in accordance with claim 10 wherein said copolymer contains between about 30 and about 36 weight percent of said monohydroxy ester.
Claim 11
Dependent Claim
38 words
A molding powder in accordance with claim 10 wherein said copolymer has molecular weight in the range of about 6,000 to about 12,000 with less than 5 percent of the molecules thereof having molecular weight below about 1,000.
Claim 12
Dependent Claim
123 words
A molded article having glass transition temperature above about 90* C., tensile strength above about 7,000 psi, tensile modulus above about 400,000 psi, and tensile elongation-to-break above 2 percent and formed from a molding powder which comprises an intimate mixture of (a) a copolymer consisting essentially of about 25 to about 40 weight percent of mono-hydroxy ester of a C2 - C3 diol and acrylic or methacrylic acid and a remainder consisting essentially of methyl methacrylate and having average molecular weight in the range of about 3,000 to about 16,000, and (b) a caprolactam-blocked di- or tri- isocyanate, said isocyanate being present in sufficient quantity to provide about 0.90 to about 1.10 blocked isocyanate groups for each hydroxy group in said molding powder.
Claim 13
Dependent Claim
24 words
A molded article in accordance with claim 13 wherein said monohydroxy ester comprises between about 30 and about 36 weight percent of said copolymer.
Claim 14
Dependent Claim
14 words
A molded article in accordance with claim 13 wherein said isocyanate triphenyl dimethylene triisocyanate.
Claim 15
Dependent Claim
17 words
A molded article in accordance with claim 13 wherein said isocyanate is 4,4'' - diphenyl methane diisocyanate.
Claim 16
Dependent Claim
38 words
A molded article in accordance with claim 13 wherein said copolymer has molecular weight in the range of about 6,000 to about 12,000 with less than 5 percent of the molecules thereof having molecular weight below about 1,000.
Claim 17
Dependent Claim
135 words
A molded article having glass transition temperature above about 90* C., tensile strength above about 7,000 psi, tensile modulus above about 400,000 psi, and tensile elongation-to-break above about 2 percent and formed from a molding powder which comprises an intimate mixture of (a) a copolymer consisting essentially of about 25 to about 40 weight percent of a monohydroxy ester of a C2 - C3 diol and acrylic or methacrylic acid and a remainder consisting essentially of a major proportion of methyl methacrylate and a minor proportion of methacrylonitrile and having average molecular weight in the range of about 3,000 to about 16,000, and (b) a caprolactam-blocked di- or tri- isocyanate, said isocyanate being present in sufficient quantity to provide about 0.90 to about 1.10 blocked isocyanate groups for each hydroxy group in said molding powder.
Claim 18
Dependent Claim
54 words
A molded article in accordance with claim 18 wherein said monohydroxy ester comprises between about 30 and about 36 weight percent of said copolymer and said copolymer has molecular weight in the range of about 6,000 to about 12,000 with less than 5 percent of the molecules thereof having molecular weight below about 1,000.
Claim 19
Dependent Claim
23 words
A molded article in accordance with claim 18 wherein said isocyanate is selected from 4,4'' - diphenyl methane diisocyanate and triphenyl dimethylene triisocyanate.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |