Patent US4052480A successfully refreshed from Google Patents.
US4052480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High solids coating compositions containing liquid bishydroxy propyl ether of a bisphenol
Assignee: DeSoto Inc
•
Filing: 1976-06-23
•
Granted: 1977-10-04
•
Expires: 1996-06-23
Abstract
Abstract Resinous coating compositions of low volatile solvent content are provided which are sufficiently fluid to permit effective application, and which cure on baking at low temperature to provide hard stain- and detergent-resistant coatings of outstanding flexibility. These are made by copolymerizing monoethylenic monomers including monoethylenic monomer having a functional group reactive with N-methylol functionality and selected from carboxylic acid, hydroxy and amide groups, the copolymerization being carried out in a solvent solution containing a major proportion of liquid bishydroxy propyl ether of a bisphenol. The copolymer solution has added thereto an aminoplast resin to provide a stable solution in which proportions are important so that coatings can be easily applied and cured to provide the desired characteristics without liberating excessive amounts of volatile material.
Inventors
- 👤 Kazys Sekmakas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:30
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08L; C08L33/00; C08L33/02; C08L61/00; C08L61/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A fluid resinous coating composition containing less than about 30% of volatile organic solvent and which cures on baking, said coating composition consisting essentially of a mixture of: 1. a copolymer of monoethylenic monomers including from about 5-20% of monoethylenic monomer having a functional group reactive with the N-methylol group and selected from carboxylic acid, hydroxy, and amide groups, said copolymer being produced by copolymerization in an organic solvent solution containing a major proportion of component (2) below; 2. liquid bishydroxy propyl ether of a bisphenol formed by reacting propylene oxide with a bisphenol; and
Claim 2
Dependent Claim
95 words
A fluid resinous coating composition containing less than about 30% of volatile organic solvent and which cures on baking, said coating composition consisting essentially of a mixture of: 1. a copolymer of monoethylenic monomers including from about 5-20% of monoethylenic monomer having a functional group reactive with the N-methylol group and selected from carboxylic acid, hydroxy, and amide groups, said copolymer being produced by copolymerization in an organic solvent solution containing a major proportion of component (2) below; 2. liquid bishydroxy propyl ether of a bisphenol formed by reacting propylene oxide with a bisphenol; and
Claim 3
Dependent Claim
76 words
an aminoplast resin; said copolymer constituting from about 4.5% to 35% of the mixture, the bishydroxy propyl ether constituting from about 20% to 40% of the mixture, and the balance of the mixture of the three components consisting essentially of aminoplast resin, there being at least about 0.8 parts of aminoplast resin per part of copolymer, and said copolymer being present in an amount of from about 15-80% of the weight of the bishydroxy propyl ether.
Claim 4
Dependent Claim
76 words
an aminoplast resin; said copolymer constituting from about 4.5% to 35% of the mixture, the bishydroxy propyl ether constituting from about 20% to 40% of the mixture, and the balance of the mixture of the three components consisting essentially of aminoplast resin, there being at least about 0.8 parts of aminoplast resin per part of copolymer, and said copolymer being present in an amount of from about 15-80% of the weight of the bishydroxy propyl ether.
Claim 5
Dependent Claim
63 words
A coating composition as recited in claim 1 in which the copolymer is present in an amount of 10% to 30%, the bishydroxy propyl ether is present in an amount of from 25% to 35%, and the aminoplast resin is present in an amount of from 30% to 70%, there being at least 2 parts of bishydroxy propyl ether per part of copolymer.
Claim 6
Dependent Claim
29 words
A coating composition as recited in claim 1 in which said bishydroxy propyl ether constitutes at least about 75% of the organic solvent in which copolymerization is carried out.
Claim 7
Dependent Claim
22 words
A coating composition as recited in claim 1 in which the volatile organic solvent content of the coating composition is from 5-20%.
Claim 8
Dependent Claim
27 words
A coating composition as recited in claim 1 in which said monoethylenic monomer having a functional group reactive with the N-methylol group is a monethylenic carboxylic acid.
Claim 9
Dependent Claim
35 words
A coating composition as recited in claim 5 in which the balance of the monoethylenic monomers in the copolymer consist of nonreactive monoethylenic monomers containing the single ethylenic group as the sole functional group thereof.
Claim 10
Dependent Claim
17 words
A coating composition as recited in claim 1 in which said aminoplast resin is hexamethoxy methyl melamine.
Claim 11
Dependent Claim
24 words
A coating composition as recited in claim 1 in which said bishydroxy propyl ether is provided by reaction of propylene oxide with bisphenol A.
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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |