US4526939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting coating compositions for the sealing of fiber reinforced plastics
Assignee: DeSoto Inc
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Filing: 1983-07-18
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Granted: 1985-07-02
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Expires: 2003-07-18
Abstract
Abstract High solids thermosetting organic solvent solution coating compositions are disclosed which are particularly useful for sealing the pores in fiber reinforced plastics. These compositions contain a mixture of resins comprising (1) from 30% to 70% of one or more hydroxy functional resins having a number average molecular weight of at least about 700, a Gardner bubble viscosity less than about Z 4 measured in methyl ethyl ketone at 90% solids at 25° C., and at least 5% of the hydroxy groups thereof being primary hydroxy groups, (2) from 10% to 70% of low molecular weight epoxy ester made by esterifying one or more resinous polyepoxides having a 1,2-epoxy equivalency of at least 1.2 with an approximately stoichiometric proportion of monocarboxylic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z 4 at 75% solids in xylol at 25° C., and (3) the balance of the mixture, but not less than 15% thereof, being a curing agent having a plurality of groups reactive with the hydroxy groups in the hydroxy resin and in the epoxy ester.
Inventors
- 👤 Ronald J. Lewarchik
- 👤 Kevin P. Murray
- 👤 Marcella G. Donovan
- 👤 Arthur T. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
C; C09; C09D; C09D163/00; C09D163/10; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4081; C08G18/64; C08G18/6407; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C09D167/00; C09D167/02; Y; Y10; Y10S; Y10S525/00; Y10S525/922; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31786
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
175 words
A thermosetting organic solvent solution coating composition containing a mixture of resins comprising (1) from 30% to 70% of one or more hydroxy functional resins having a number average molecular weight of at least about 700, a Gardner bubble viscosity less than about Z 4 measured in methyl ethyl ketone at 90% solids at 25° C., and at least 5% of the hydroxy groups thereof being primary hydroxy groups, (2) from 10% to 70% of low molecular weight epoxy ester made by esterifying one or more resinous polyepoxides having a 1,2-epoxy equivalency of at least 1.2 with an approximately stoichiometric proportion of monocarboxylic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z 4 at 75% solids in xylol at 25° C., and (3) the balance of the mixture, but not less than 15% thereof, being a curing agent having a plurality of groups reactive with the hydroxy groups in the hydroxy resin and in the epoxy ester, said composition having a total solids content of at least 35%.
Claim 2
Dependent Claim
175 words
A thermosetting organic solvent solution coating composition containing a mixture of resins comprising (1) from 30% to 70% of one or more hydroxy functional resins having a number average molecular weight of at least about 700, a Gardner bubble viscosity less than about Z 4 measured in methyl ethyl ketone at 90% solids at 25° C., and at least 5% of the hydroxy groups thereof being primary hydroxy groups, (2) from 10% to 70% of low molecular weight epoxy ester made by esterifying one or more resinous polyepoxides having a 1,2-epoxy equivalency of at least 1.2 with an approximately stoichiometric proportion of monocarboxylic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z 4 at 75% solids in xylol at 25° C., and (3) the balance of the mixture, but not less than 15% thereof, being a curing agent having a plurality of groups reactive with the hydroxy groups in the hydroxy resin and in the epoxy ester, said composition having a total solids content of at least 35%.
Claim 3
Dependent Claim
24 words
A coating composition as recited in claim 1 in which the composition has a total solids content of from 50% up to about 90%.
Claim 4
Dependent Claim
24 words
A coating composition as recited in claim 1 in which said curing agent is selected from aminoplast resins, phenoplast resins, and blocked organic polyisocyanates.
Claim 5
Dependent Claim
38 words
A coating composition as recited in claim 1 in which from 50% to 75% of the hydroxy functionality is present in said hydroxy functional resins, with the balance of the hydroxy functionality being supplied by said epoxy ester.
Claim 6
Dependent Claim
24 words
A coating composition as recited in claim 1 in which the epoxy component of said epoxy ester has a molecular weight below about 1000.
Claim 7
Dependent Claim
38 words
A coating composition as recited in claim 5 in which the epoxy component of said epoxy ester is a diglycidyl ether of a bisphenol having a 1,2-epoxy equivalency of from 1.7-2.0 and a molecular weight below about 500.
Claim 8
Dependent Claim
26 words
A coating composition as recited in claim 1 in which at least 50% of the hydroxy groups of said hydroxy functional resins are of primary character.
Claim 9
Dependent Claim
18 words
A coating composition as recited in claim 1 in which said monocarboxylic acid contains from 16-22 carbon atoms.
Claim 10
Dependent Claim
15 words
A coating composition as recited in claim 8 in which said monocarboxylic acid is unsaturated.
Claim 11
Dependent Claim
19 words
A coating composition as recited in claim 9 in which a drier salt is included to aid the cure.
Claim 12
Dependent Claim
25 words
A coating composition as recited in claim 1 in which pigment is present to provide a pigment to binder ratio of from 0.3:1 to 0.9:1.
Claim 13
Dependent Claim
44 words
A coating composition as recited in claim 1 in which the curing agent is hexamethoxymethyl melamine used in an amount of from 15% to 35%, based on the mixture of three named components, and an acid catalyst is present to lower the curing temperature.
Claim 14
Dependent Claim
20 words
A coating composition as recited in claim 1 in which said hydroxy functional resin is an hydroxy functional polyester resin.
Claim 15
Dependent Claim
46 words
A coating composition as recited in claim 13 in which said hydroxy functional polyester resin is constituted by the polyesterification product of aliphatic dihydric alcohol with aliphatic dicarboxylic acid constituting at least about 85% of the polyester, and up to about 5% of aromatic polycarboxylic acid.
Claim 16
Dependent Claim
32 words
A coating composition as recited in claim 1 in which said hydroxy functional polyester resin has an hydroxy value in the range of 150-450 and an acid value of less than 20.
Claim 17
Dependent Claim
32 words
A coating composition as recited in claim 15 in which said hydroxy functional polyester resin has an hydroxy value in the range of 200-350 and an acid value of less than 6.
Claim 18
Dependent Claim
174 words
A thermosetting organic solvent solution coating composition containing a mixture of resins comprising (1) from 30% to 65% of hydroxy functional polyester resin having a number average molecular weight of at least about 700, a Gardner bubble viscosity less than about Z 4 measured in methyl ethyl ketone at 90% solids at 25° C., and at least 50% of the hydroxy groups being primary hydroxy groups, said polyester resin having an hydroxy value in the range of 150-450 and an acid value of less than 20, (2) from 15% to 30% of an epoxy ester made by esterifying one or more resinous polyepoxides having a molecular weight below about 1000 and having a 1,2-epoxy equivalency of 1.7-2.0 with an approximately stoichiometric proportion of monocarboxylic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z 4 at 75% solids in xylol at 25° C., and (3) from 15% to 35% of an alkylated aminoplast resin, said composition having a total solids content of from 50% up to about 90%.
Claim 19
Dependent Claim
174 words
A thermosetting organic solvent solution coating composition containing a mixture of resins comprising (1) from 30% to 65% of hydroxy functional polyester resin having a number average molecular weight of at least about 700, a Gardner bubble viscosity less than about Z 4 measured in methyl ethyl ketone at 90% solids at 25° C., and at least 50% of the hydroxy groups being primary hydroxy groups, said polyester resin having an hydroxy value in the range of 150-450 and an acid value of less than 20, (2) from 15% to 30% of an epoxy ester made by esterifying one or more resinous polyepoxides having a molecular weight below about 1000 and having a 1,2-epoxy equivalency of 1.7-2.0 with an approximately stoichiometric proportion of monocarboxylic fatty acid to provide an essentially epoxy-free ester having a Gardner bubble viscosity less than Z 4 at 75% solids in xylol at 25° C., and (3) from 15% to 35% of an alkylated aminoplast resin, said composition having a total solids content of from 50% up to about 90%.
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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |