US3770490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making and coating with high solids cured acrylic syrups
Assignee: PPG Industries Inc
•
Filing: 1971-01-05
•
Granted: 1973-11-06
•
Expires: 1991-01-05
Abstract
Abstract A method of curing acrylic syrups comprises polymerizing a mixture of acrylic monomers, isopropyl alcohol, and peroxide catalyst by subjecting to heat and adding monofunctional acrylic monomers and poly-functional acrylic monomers to the polymerized acrylic composition to form an acrylic syrup and curing the acrylic syrup by subjecting to either ionizing irradiation or actinic light. The cured syrups are useful as interior container coatings.
Inventors
- 👤 E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C08J2333/00; C08J2333/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
24 words
The method of claim 1 wherein the mono-functional acrylic monomer is acrylic acid, methacrylic acid or an ester of acrylic acid or methacrylic acid.
Claim 2
Dependent Claim
22 words
The method of claim 1 wherein the mixture is polymerized by subjecting to a temperature of from about 80* to about 100*C.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein the mixture is cured by subjecting to a total dosage of from about 0.2 megarads to about 20 megarads of ionizing irradiation.
Claim 4
Dependent Claim
37 words
The method of claim 2 wherein the amount of isopropyl alcohol used in Step (A) is from about 5 to about 90 percent based on the total weight of isopropyl alcohol and mono-functional monomers to be polymerized.
Claim 5
Dependent Claim
36 words
The method of claim 1 wherein the amount of mono-functional acrylic monomers added in Step (B) is from about 30 to about 50 percent by weight of the addition of the acrylic monomers in Step (A).
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein crosslinking poly-functional acrylic monomers are additionally present in Step (B).
Claim 7
Dependent Claim
28 words
The method of claim 7 wherein the crosslinking poly-functional acrylic monomers comprise from about 5 to about 70 percent by weight of the added monomers in Step (B).
Claim 8
Dependent Claim
67 words
The method of claim 1 wherein the mixture to be polymerized in Step (A) is formed by slowly adding isopropyl alcohol and the mono-functional acrylic monomers and the catalyst to a small amount of isopropyl alcohol and mono-functional acrylic monomers while heating wherein the total amount of alcohol and monomers added slowly is greater than the amount of alcohol and monomers to which they are being added.
Claim 9
Dependent Claim
29 words
The method of claim 9 wherein the alcohol and monomers being added slowly comprise 90 percent by weight of the total alcohol and monomers being polymerized in Step (A).
Claim 10
Independent Claim
57 words
A method of coating a substrate comprising A. polymerizing a mixture of mono-functional acrylic monomers in the presence of isopropyl alcohol and a peroxide catalyst B. adding mono-functional acrylic monomers to the polymerized acrylic materials, and C. applying the mixture to the substrate and curing the mixture in situ by subjecting to ionizing irradiation of actinic light.
Claim 11
Dependent Claim
10 words
The method of claim 11 wherein the substrate is metal.
Claim 12
Dependent Claim
23 words
The method of claim 11 wherein the mono-functional acrylic monomer is acrylic acid, methacrylic acid or an ester of acrylic or methacrylic acid.
Claim 13
Dependent Claim
22 words
The method of claim 11 wherein the mixture is polymerized by subjecting to a temperature of from about 80*C. to about 100*C.
Claim 14
Dependent Claim
28 words
The method of claim 11 wherein the mixture is cured by subjecting to a total dosage of from about 0.2 megarads to about 20 megarads of ionizing irradiation.
Claim 15
Dependent Claim
25 words
The method of claim 11 wherein the isopropyl alcohol comprises from about 5 to about 90 percent by weight of the mixTure in Step (A).
Claim 16
Dependent Claim
37 words
The method of claim 11 wherein the amount of mono-functional acrylic monomers added in Step (B) is from about 30 to about 50 percent by weight of the addition of the mono-functional acrylic monomers in Step (A).
Claim 17
Dependent Claim
64 words
The method of claim 11 wherein the mixture to be polymerized in Step (A) is formed by slowly adding isopropyl alcohol and the acrylic monomers and the catalyst to a mixture of isopropyl alcohol and acrylic monomers while heating wherein the total amount of alcohol and monomers added slowly is greater than the amount of alcohol and monomers to which they are being added.
Claim 18
Dependent Claim
18 words
The method of claim 11 wherein crosslinking poly-functional acrylic monomers are added to the mixture in Step (B).
Claim 19
Dependent Claim
26 words
The method of claim 19 wherein the crosslinking poly-functional acrylic monomers comprise from about 5 to about 70 percent by weight of the added acrylic monomers.
Claim 20
Independent Claim
66 words
The method of coating the interior of a can comprising A. polymerizing a mixture of mono-functional acrylic monomers in the presence of isopropyl alcohol and a peroxide catalyst and polymerizing by subjecting to heat, B. adding mono-functional monomers to the polymerized acrylic materials, and C. applying the mixture to the interior of the can and curing the mixture by subjecting to ionizing irradiation or actinic light.
Claim 21
Dependent Claim
15 words
The method of claim 21 wherein crosslinking poly-functional acrylic monomers are added in Step (B).
Claim 22
Dependent Claim
20 words
The method of claim 1 wherein subsequent to step (A) and prior to step (B), the isopropyl alcohol is removed.
Claim 23
Dependent Claim
20 words
The method of claim 1 wherein subsequent to step (A) and prior to step (B), the isopropyl alcohol is removed.
Claim 24
Dependent Claim
20 words
The method of claim 21 wherein subsequent to step (A) and prior to step (B) the isopropyl alcohol is removed.
References Cited (Backward Citations)
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |