US4396680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate coated with crater resistant acrylic enamel
Assignee: Zimmer Surgical Inc
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Filing: 1981-11-18
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Granted: 1983-08-02
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Expires: 2001-11-18
Abstract
Abstract A substrate of either metal or plastic which is coated with a crater resistant enamel coating composition is used for the exterior of trucks and automobiles; the binder of the coating composition is a blend of (A) an acrylic polymer having hydroxy groups and contains about 0.1-10% by weight of a polymerized perfluoro carbon constituent of the formula <IMAGE> where R is H or CH3, R1 is alkyl, R2 is perfluoro alkyl and n is 0 or 1 and (B) an aminoplast crosslinking agent such as an alkylated melamine formaldehyde resin; The composition is applied and baked by conventional techniques, to form a finish on the substrate that has an excellent appearance.
Inventors
- 👤 David C. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/066; C09D161/00; C09D161/20; C09D161/32; C08; C08L; C08L61/00; C08L61/20; C08L61/32; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31616; Y10T428/3162; Y10T428/31634; Y10T428/31645; Y10T428/31649; Y10T428/31678; Y10T428/31688; Y10T428/31692; Y10T428/31696; Y10T428/31699; Y10T428/31855; Y10T428/31859; Y10T428/31877; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31924; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
201 words
A substrate coated with a cured finish of coating composition comprising about 25-80% by weight of a binder and 20-75% by weight of an organic liquid; wherein the binder comprises (A) about 40-90% by weight, based on the weight of the binder, of an acrylic polymer having a hydroxyl content about 0.5 to 10% by weight, and consists essentially of an alkyl methacrylate having 1-18 carbon atoms in the alkyl group, an alkyl acrylate having 2-18 carbon atoms in the alkyl group, a hydroxyalkyl acrylate or a hydroxy alkyl methacrylate having 2-4 carbon atoms in the alkyl group, up to 5% by weight of an α-β ethylenically unsaturated acid, and contains about 0.5-5% by weight based on the weight of the acrylic polymer, of polymerized perfluorocarbon constituent of the formula ##STR4## where R is H or CH 3 , R 1 is an alkyl group containing 2-8 carbon atoms, n is 0 or 1 and R 2 is a perfluoroalkyl group containing 4-20 carbon atoms and the polymer has a weight average molecular weight of about 2000-50,000 determined by gel permeation chromatography; and (B) about 10-60% by weight; based on the weight of the binder, of an alkylated melamine formaldehyde resin.
Claim 2
Dependent Claim
201 words
A substrate coated with a cured finish of coating composition comprising about 25-80% by weight of a binder and 20-75% by weight of an organic liquid; wherein the binder comprises (A) about 40-90% by weight, based on the weight of the binder, of an acrylic polymer having a hydroxyl content about 0.5 to 10% by weight, and consists essentially of an alkyl methacrylate having 1-18 carbon atoms in the alkyl group, an alkyl acrylate having 2-18 carbon atoms in the alkyl group, a hydroxyalkyl acrylate or a hydroxy alkyl methacrylate having 2-4 carbon atoms in the alkyl group, up to 5% by weight of an α-β ethylenically unsaturated acid, and contains about 0.5-5% by weight based on the weight of the acrylic polymer, of polymerized perfluorocarbon constituent of the formula ##STR4## where R is H or CH 3 , R 1 is an alkyl group containing 2-8 carbon atoms, n is 0 or 1 and R 2 is a perfluoroalkyl group containing 4-20 carbon atoms and the polymer has a weight average molecular weight of about 2000-50,000 determined by gel permeation chromatography; and (B) about 10-60% by weight; based on the weight of the binder, of an alkylated melamine formaldehyde resin.
Claim 3
Dependent Claim
29 words
The substrate of claim 1 in which the coating composition contains pigments in a pigment to binder weight ratio of about 0.5 to 100 to about 300 to 100.
Claim 4
Dependent Claim
31 words
The substrate of claims 1 or 2 in which the coating composition comprises about 55-75% by weight, of the binder and 25-45% by weight of an organic solvent for the binder.
Claim 5
Dependent Claim
25 words
The substrate of claim 1 in which the acrylic polymer contains up to 50% by weight, based on the weight of the polymer, of styrene.
Claim 6
Dependent Claim
20 words
The substrate of claim 1 in which the alkylated melamine formaldehyde resin has 1-4 carbon atoms in the alkyl group.
Claim 7
Dependent Claim
111 words
The substrate of claim 3 in which (A) the acrylic polymer of the binder consists essentially of 10-40% by weight of an alkyl methacrylate having 1-4 carbon atoms in the alkyl group, 30-50% by weight of an alkyl acrylate having 2-12 carbon atoms in the alkyl group, 15-45% by weight of a hydroxy alkyl acrylate or a hydroxy alkyl methacrylate each having 2-4 carbon atoms in the alkyl group, 0.1-5% by weight of acrylic acid or methacrylic acid and 0.5-5% by weight of a perfluoro alkyl ethyl methacrylate having 6-12 carbon atoms in the alkyl group and (B) the alkylated melamine formaldehyde resin has 1-4 carbon atoms in the alkyl group.
Claim 8
Dependent Claim
86 words
The substrate of claim 4 in which the binder of the coating composition comprises (A) an acrylic polymer consists essentially of about 10-20% by weight of styrene 10-20% by weight of methyl methacrylate, 35-45% by weight of butyl acrylate 25-35% by weight of hydroxy ethyl acrylate, 0.1-2% by weight of acrylic acid and 0.5-5% by weight of a perfluoro alkyl ethyl methacrylate having 6-12 carbon atoms in the alkyl group and (B) the alkylated melamine formaldehyde crosslinking resin is a methylated and butylated melamine formaldehyde resin.
Claim 9
Dependent Claim
25 words
The substrate of claim 7 in which the coating composition contains 0.1-5% by weight, based on the weight of the composition, of an acid catalyst.
Claim 10
Dependent Claim
14 words
The substrate of claim 8 in which the acid catalyst is paratoluene sulfonic acid.
Claim 11
Dependent Claim
29 words
The substrate of claims 1 or 2 in which the coating composition contains about 0.1-5% by weight, based on the weight of the binder, of an ultraviolet light stabilizer.
Claim 12
Dependent Claim
25 words
The substrate of claim 10 in which the coating composition contains about 0.1-5% by weight, based on the weight of the binder, of an antioxidant.
Claim 13
Dependent Claim
17 words
The coated substrate of claim 1 in which the substrate is metal or a flexible plastic material.
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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) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |