US4368222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor permeation curable coatings for surface-porous substrates
Assignee: Sherwin Williams Co
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Filing: 1981-06-05
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Granted: 1983-01-11
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Expires: 2001-06-05
Abstract
Abstract Disclosed is an improved method for coating a surface-porous substrate, e.g. an SMC substrate, with a film of curable coating composition and curing said film. The improvement comprises applying a film of the coating composition to the substrate wherein the coating composition comprises a phenol-functional compound and a multi-isocyanate curing agent therefor, and exposing the coated substrate to a vaporous tertiary amine catalyst to cure the applied film.
Inventors
- 👤 James R. Blegen
- 👤 Helmut H. Zapfe
- 👤 Eugene L. Bulgozdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:21
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4291; B; B05; B05D; B05D5/00; B05D5/06; B05D3/00; B05D3/04; B05D3/0433; B05D3/0453; B05D3/046; B05D3/10; B05D3/107; B05D3/108; B05D7/00; B05D7/02; B05D7/14; B05D7/16; C08G18/08; C08G18/16; C08G18/18; C08G18/1891; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4219; C08G18/4266; C08G18/4286; C08G18/54; C08G18/542; C09; C09D; C09D175/00; C09D175/04
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
88 words
In a method for coating a surface-porous substrate of a fibrous-reinforced molding compound with a film of a curable primer coating composition and curing said film, the improvement which comprises: (A) applying said film of said coating composition to said substrate, said coating composition comprising: (1) an aromatic-hydroxyl functional compound; and (2) a multi-isocyanate curing agent; and (B) exposing said coated substrate to a vaporous tertiary amine catalyst to rapidly cure said applied film at room temperature, said vaporous catalyst cured film being substantially free of surface imperfections.
Claim 2
Dependent Claim
88 words
In a method for coating a surface-porous substrate of a fibrous-reinforced molding compound with a film of a curable primer coating composition and curing said film, the improvement which comprises: (A) applying said film of said coating composition to said substrate, said coating composition comprising: (1) an aromatic-hydroxyl functional compound; and (2) a multi-isocyanate curing agent; and (B) exposing said coated substrate to a vaporous tertiary amine catalyst to rapidly cure said applied film at room temperature, said vaporous catalyst cured film being substantially free of surface imperfections.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said coating composition is dispersed in a fugitive solvent.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said solvent is a fugitive organic solvent.
Claim 5
Dependent Claim
16 words
The method of claim 2 wherein said aromatic-hydroxyl functional compound is a monomer, oligomer, or polymer.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein the molar ratio of aromatic hydroxyl groups to isocyanate groups is between about 1:1 and 1:2.
Claim 7
Dependent Claim
14 words
The method of claim 1 wherein said coating composition also contains a particulate filler.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein said substrate is sheet molding compound.
Claim 9
Dependent Claim
21 words
The method of claim 1 wherein a top-coated coating composition is applied over said cured coating and said top-coated is cured.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein said coating composition is applied by spraying.
Claim 11
Dependent Claim
11 words
The method of claim 6 wherein said filler comprises barium sulfate.
Claim 12
Dependent Claim
18 words
The method of claim 1 wherein said aromatic-hydroxyl functional compound is substantially free of reactive aliphatic hydroxyl groups.
Claim 13
Dependent Claim
17 words
The method of claim 1 wherein said film ranges in thickness between about 0.3 and 4 mils.
Claim 14
Dependent Claim
14 words
The method of claim 5 wherein said ratio is between about 1:1.1 and 1:1.3.
Claim 15
Dependent Claim
117 words
In a method for coating a composite object manufactured from a surface-porous fibrous-reinforced molded compound part and from a non surface-porous part selected from metal, resinous material, and lignocellulosic material, with a film of a primer coating composition and curing said film, the improvement which comprises: (A) applying said film of said coating composition to both said surface porous part and to said non surface-porous part, said coating composition comprising: (1) an aromatic-hydroxyl functional compound; and (2) a multi-isocyanate curing agent; and (B) exposing said coated parts to a vaporous tertiary amine catalyst to rapidly cure said applied film at room temperature, said vaporous catalyst cured film on said surface-porous part being substantially free of surface imperfections.
Claim 16
Dependent Claim
117 words
In a method for coating a composite object manufactured from a surface-porous fibrous-reinforced molded compound part and from a non surface-porous part selected from metal, resinous material, and lignocellulosic material, with a film of a primer coating composition and curing said film, the improvement which comprises: (A) applying said film of said coating composition to both said surface porous part and to said non surface-porous part, said coating composition comprising: (1) an aromatic-hydroxyl functional compound; and (2) a multi-isocyanate curing agent; and (B) exposing said coated parts to a vaporous tertiary amine catalyst to rapidly cure said applied film at room temperature, said vaporous catalyst cured film on said surface-porous part being substantially free of surface imperfections.
Claim 17
Dependent Claim
23 words
The method of claim 14 wherein said surface-porous part is a sheet molding compound (SMC) part and said non surface-porous part is metal.
Claim 18
Dependent Claim
18 words
The method of claim 14 or 15 wherein said coating composition is dispersed in a fugitive organic solvent.
Claim 19
Dependent Claim
15 words
The method of claim 14 or 15 wherein said coating composition contains a particulate filler.
Claim 20
Dependent Claim
13 words
The method of claim 15 wherein said coating composition contains a corrosion-inhibiting pigment.
Claim 21
Dependent Claim
44 words
The method of claim 15 wherein said coating composition is dispersed in a fugitive organic solvent, contains a particulate filler and a corrosion-inhibiting pigment, and is a primer for said parts; a top-coat is applied over said cured primer and said top-coat is cured.
Claim 22
Dependent Claim
21 words
The method of claim 19 wherein the ratio of aromatic hydroxyl groups to isocyanate groups is between about 0.5:1 and 1:2.
Claim 23
Dependent Claim
13 words
The method of claim 20 wherein said ratio is between 1:1 and 1:2.
Claim 24
Dependent Claim
19 words
The method of claim 21 wherein said curing agent contains both an aromatic and an aliphatic multi-isocyanate curing agent.
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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) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |