US4751129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One-part hot-sprayable epoxy resin systems and methods
Assignee: Ashland Chemical Co
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Filing: 1987-08-10
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Granted: 1988-06-14
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Expires: 2007-08-10
Abstract
Abstract A one-part composition for application to a substrate, e.g., automotive metal body panels, to provide reinforcement thereto is a thixotropic admixture containing as essential components (a) a heat curable epoxy resin system including the reaction product in the presence of a catalyst of at least one epoxy resin with a carboxy terminated elastomer, (b) dicyandiamide, and (c) a plurality of inorganic particulate filler materials, at least one of which is capable of imparting thixotropic properties to the composition. The method of reinforcing the substrate involves spraying the one-part epoxy resin containing composition onto at least a portion thereof in a heated condition and thereafter curing the composition at a temperature higher than the spraying temperature. Resulting reinforced substrates have tenaciously adhered thereto on at least a portion of one surface thereof a thermoset layer formed by the hot spraying and then curing thereon of the thixotropic composition.
Inventors
- 👤 Balasubramaniam Ramalingam
- 👤 II George W. Ritter
- 👤 Mohan V. Kulkarni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:09
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/504; C08G59/02; C08G59/20; C08G59/22; C08G59/226; C08G59/4007; C08G59/4014; C08G59/4021; C09; C09D; C09D163/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
137 words
A one-part composition for application to a substrate to provide reinforcement thereto by spraying when heated to a first temperature above ambient and thereafter cured at a second temperature higher than said first temperature which is a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product of the following materials: (1) a liquid bisphenol A epoxy resin, (2) a solid bisphenol A epoxy resin, (3) a carboxyterminated acrylonitrile butadiene copolymer, (4) bisphenol A, and (5) a triarylphosphine catalyst, (b) dicyandiamide, (c) a catalyst accelerator, and (d) a mixture of the following inorganic particulate filler materials: (A) fibrous calcium silicate, (B) mica, and (C) fumed silica, said components constituting the following approximate percentages by weight of said composition: component a 40-70% component b 1-3% component c 0.1-2% component d 25-45%.
Claim 2
Dependent Claim
137 words
A one-part composition for application to a substrate to provide reinforcement thereto by spraying when heated to a first temperature above ambient and thereafter cured at a second temperature higher than said first temperature which is a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product of the following materials: (1) a liquid bisphenol A epoxy resin, (2) a solid bisphenol A epoxy resin, (3) a carboxyterminated acrylonitrile butadiene copolymer, (4) bisphenol A, and (5) a triarylphosphine catalyst, (b) dicyandiamide, (c) a catalyst accelerator, and (d) a mixture of the following inorganic particulate filler materials: (A) fibrous calcium silicate, (B) mica, and (C) fumed silica, said components constituting the following approximate percentages by weight of said composition: component a 40-70% component b 1-3% component c 0.1-2% component d 25-45%.
Claim 3
Dependent Claim
50 words
The composition of claim 1 which contains up to about 10% by weight of one or more of the following additional components: (e) An epoxidized polyalklene glycol, (f) a low molecular weight polyamide, (g) an organophosphate soap, (h) an aminoalkyltrialalkloxy silane, (i) a polyetherdiamine urea adduct, (j) an epoxy resin.
Claim 4
Independent Claim
101 words
The method of reinforcing a web which comprises spraying a one-part epoxy resin containing composition onto at least a portion thereof in a heated condition and thereafter curing said composition at a temperature higher than the spraying temperature, said composition being a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product in the presence of a catalyst of at least one epxoxy resin with a carboxy terminated elastomer, (b) dicyandiamide, and (c) a plurality of inorganic particulate filler materials at least one of which is capable of imparting thixotropic properties to said composition.
Claim 5
Independent Claim
101 words
The method of reinforcing a web which comprises spraying a one-part epoxy resin containing composition onto at least a portion thereof in a heated condition and thereafter curing said composition at a temperature higher than the spraying temperature, said composition being a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product in the presence of a catalyst of at least one epxoxy resin with a carboxy terminated elastomer, (b) dicyandiamide, and (c) a plurality of inorganic particulate filler materials at least one of which is capable of imparting thixotropic properties to said composition.
Claim 6
Independent Claim
145 words
The method of reinforcing a web which comprises spraying a one-part epoxy resin containing composition onto at least a portion thereof in a heated condition and thereafter curing said composition at a temperature higher than the spraying temperature, said composition being a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product of the following materials: (1) a liquid bisphenol A epoxy resin, (2) a solid bisphenol A epoxy resin, (3) a carboxyterminated acrylonitrile butadiene copolymer, (4) bisphenol A, and (5) a triarylphosphine catalyst. (b) dicyandiamide, (c) a catalyst accelerator, and (d) a mixture of the following inorganic particulate filler materials: (A) fibrous calcium silicate, (B) mica, and (C) fumed silica. (D) hydrated alumina said components constituting the following approximate percentages by weight of said composition: component a 40-70% component b 1-3% component c 0.1-2% component d 25-45%
Claim 7
Independent Claim
145 words
The method of reinforcing a web which comprises spraying a one-part epoxy resin containing composition onto at least a portion thereof in a heated condition and thereafter curing said composition at a temperature higher than the spraying temperature, said composition being a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product of the following materials: (1) a liquid bisphenol A epoxy resin, (2) a solid bisphenol A epoxy resin, (3) a carboxyterminated acrylonitrile butadiene copolymer, (4) bisphenol A, and (5) a triarylphosphine catalyst. (b) dicyandiamide, (c) a catalyst accelerator, and (d) a mixture of the following inorganic particulate filler materials: (A) fibrous calcium silicate, (B) mica, and (C) fumed silica. (D) hydrated alumina said components constituting the following approximate percentages by weight of said composition: component a 40-70% component b 1-3% component c 0.1-2% component d 25-45%
Claim 8
Dependent Claim
18 words
The method of claim 3 wherein said web is sheet material comprising a portion of a larger structure.
Claim 9
Dependent Claim
20 words
The method of claim 5 wherein said sheet material is sheet metal and said larger structure is a motor vehicle.
Claim 10
Dependent Claim
86 words
A reinforced web having adhered thereto on at least a portion of one surface thereof a thermoset layer formed by hot spraying and then curing thereon a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product in the presence of a catalyst of at least one epoxy resin with a carboxy terminated elastomer, (b) dicyandiamide, and (c) a plurality of inorganic particulate filler materials at least one of which is capable of imparting thixotropic properties to said composition.
Claim 11
Dependent Claim
86 words
A reinforced web having adhered thereto on at least a portion of one surface thereof a thermoset layer formed by hot spraying and then curing thereon a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product in the presence of a catalyst of at least one epoxy resin with a carboxy terminated elastomer, (b) dicyandiamide, and (c) a plurality of inorganic particulate filler materials at least one of which is capable of imparting thixotropic properties to said composition.
Claim 12
Dependent Claim
14 words
The article of claim 7 wherein said web is a section of sheet material.
Claim 13
Dependent Claim
16 words
The article of claim 8 wherein said sheet material comprises a part of a larger structure.
Claim 14
Dependent Claim
20 words
The article of claim 9 wherein said sheet material is sheet material and said larger structure is a motor vehicle.
Claim 15
Dependent Claim
127 words
A reinforced web having adhered thereto on at least a portion of one surface thereof a thermoset layer formed by hot spraying and then curing thereon a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product of the following materials: (1) a liquid bisphenol A epoxy resin, (2) a solid bisphenol A epoxy resin, (3) a carboxyterminated acrylonitrile butadiene copolymer, (4) bisphenol A, and (5) a triarylphosphine catalyst. (b) dicyandiamide, (c) a catalyst accelerator, and (d) a mixture of the following inorganic particulate filler materials: (A) fibrous calcium silicate, (B) mica, and (C) fumed silica. said components constituting the following approximate percentages by weight of said composition: component a 40-70% component b 1-3% component c 0.1-2% component d 25-45%.
Claim 16
Dependent Claim
127 words
A reinforced web having adhered thereto on at least a portion of one surface thereof a thermoset layer formed by hot spraying and then curing thereon a thixotropic admixture comprising the following components: (a) a heat curable epoxy resin system comprising the reaction product of the following materials: (1) a liquid bisphenol A epoxy resin, (2) a solid bisphenol A epoxy resin, (3) a carboxyterminated acrylonitrile butadiene copolymer, (4) bisphenol A, and (5) a triarylphosphine catalyst. (b) dicyandiamide, (c) a catalyst accelerator, and (d) a mixture of the following inorganic particulate filler materials: (A) fibrous calcium silicate, (B) mica, and (C) fumed silica. said components constituting the following approximate percentages by weight of said composition: component a 40-70% component b 1-3% component c 0.1-2% component d 25-45%.
Claim 17
Dependent Claim
14 words
The article of claim 11 wherein said web is a section of sheet material.
Claim 18
Dependent Claim
16 words
The article of claim 12 wherein said sheet material comprises a part of a larger structure.
Claim 19
Dependent Claim
20 words
The article of claim 13 wherein said sheet material is sheet material and said larger structure is a motor vehicle.
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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) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |