US4124551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aliphatic hydrocarbon solvent reducible acrylic enamel of improved quality
Assignee: Sherwin Williams Co
•
Filing: 1977-09-26
•
Granted: 1978-11-07
•
Expires: 1997-09-26
Abstract
Abstract This invention relates to novel fast-drying aliphatic solvent soluble acrylic-styrene polymer vehicles of paramount value as the binder vehicle for enamels and particularly for automotive after-market refinishing.
Inventors
- 👤 John Mathai
- 👤 Thomas W. Druetzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:51
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D151/00; C09D151/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
Fast-drying, aliphatic hydrocarbon solvent soluble polyacrylic enamel vehicle binders prepared by initially polymerizing from about 5% to less than 30% by weight of glycidyl methacrylate, from about 15% to about 75% by weight of a drying oil fatty acid containing moiety, from about 35% to 75% by weight of one or more alkyl acrylates and/or hydroxy alkyl acrylates and from 5% to 50% by weight of an isobornyl acrylate or isobornyl methacrylate to from an initial polymer and thereafter interpolymerizing therein from about 1% to 100% by weight thereof of a polymerizable monomer consisting essentially of styrene.
Claim 2
Dependent Claim
97 words
Fast-drying, aliphatic hydrocarbon solvent soluble polyacrylic enamel vehicle binders prepared by initially polymerizing from about 5% to less than 30% by weight of glycidyl methacrylate, from about 15% to about 75% by weight of a drying oil fatty acid containing moiety, from about 35% to 75% by weight of one or more alkyl acrylates and/or hydroxy alkyl acrylates and from 5% to 50% by weight of an isobornyl acrylate or isobornyl methacrylate to from an initial polymer and thereafter interpolymerizing therein from about 1% to 100% by weight thereof of a polymerizable monomer consisting essentially of styrene.
Claim 3
Dependent Claim
32 words
The product of claim 1 wherein from 5% to 45% by weight of the polymeric solids thereof of an unsaturated polymerizable monomer comprising styrene is post polymerized into the initial reaction mass.
Claim 4
Dependent Claim
23 words
The product of claim 1 where the drying oil fatty acid ester moiety is the di fatty acid ester of dimethylol propionic acid.
Claim 5
Dependent Claim
19 words
The product of claim 3 wherein the glycidyl methacrylate component is from 3% to 20% of the initial polymer.
Claim 6
Independent Claim
162 words
A method for production of a polyacrylic enamel vehicle binder which comprises initially polymerizing from about 5% to less than 30% by weight of glycidyl methacrylate and from about 35% to 75% of one or more alkyl acrylate and/or hydroxy alkyl acrylate and from 5% to 50% of an isobornyl acrylate or isobornyl methacrylate by heating the said monomers together in a volatile organic solvent; after a first exotherm has been noted, adding a quantity of from 10% to about 45% by weight of a substantially non-conjugated unsaturated drying oil acid ester and containing the reaction for a time and temperature sufficient to reduce the acid value of the reaction mass to less than 50 and thereafter post-polymerizing a monomer in said reaction mass consisting essentially of styrene in the presence of addition catalysts until substantially all the said monomeric styrene no longer refluxes from the first-formed acrylic interpolymer above and the acid value has been reduced to less than about 5.
Claim 7
Independent Claim
162 words
A method for production of a polyacrylic enamel vehicle binder which comprises initially polymerizing from about 5% to less than 30% by weight of glycidyl methacrylate and from about 35% to 75% of one or more alkyl acrylate and/or hydroxy alkyl acrylate and from 5% to 50% of an isobornyl acrylate or isobornyl methacrylate by heating the said monomers together in a volatile organic solvent; after a first exotherm has been noted, adding a quantity of from 10% to about 45% by weight of a substantially non-conjugated unsaturated drying oil acid ester and containing the reaction for a time and temperature sufficient to reduce the acid value of the reaction mass to less than 50 and thereafter post-polymerizing a monomer in said reaction mass consisting essentially of styrene in the presence of addition catalysts until substantially all the said monomeric styrene no longer refluxes from the first-formed acrylic interpolymer above and the acid value has been reduced to less than about 5.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |