US3755226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy bitumen system for road surfacing
Assignee: Dow Chemical Co
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Filing: 1971-11-24
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Granted: 1973-08-28
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Expires: 1991-11-24
Abstract
Abstract The present invention relates to bituminous polyepoxide compositions and their use. In particular, the bituminous polyepoxide compositions of this invention may be used for coating substrates such as asphalt, concrete and metals, for example, steel. The bituminous polyepoxide coating compositions of the invention may be advantageously used for surfacing roadways, walkways and aircraft runways for producing selflevelling floors, for coating pipes and lining tanks, for electrical insulation, and as joint compounds.
Inventors
- 👤 P Christiansen
- 👤 J Spoelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:35
CPC Classifications
C; C08; C08L; C08L63/00; C08L75/00; C08L75/04; C08L95/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
scavenger compound which is non-reactive with said epoxy resin and which contains at least one active group from the class consisting of -OH and -SH in sufficient quantity to react with said free -NCO groups; B. from 30 to 40 percent by weight of the cured composition of a soft bituminous material having a pen value of more than 250, and C. from 10 to 15 percent by weight of the cured composition of a hardener being about a 1 to 1 mixture by weight of an aromatic polyamine and a phenolic compound.
Claim 2
Dependent Claim
29 words
A composition as claimed in claim 1 comprising a non-modified epoxy resin is present in an amount of from 10 to 17 percent by weight of the cured composition.
Claim 3
Dependent Claim
17 words
A composition as claimed in claim 2 wherein the non-modified epoxy resin is a bisphenol glycidyl ether.
Claim 4
Dependent Claim
26 words
A composition as claimed in claim 1 comprising an aliphatic triglycidyl ether in an amount of up to 7 percent by weight of the cured composition.
Claim 5
Dependent Claim
31 words
A composition as claimed in claim 1 further comprising a cycloaliphatic amine in an amount of from 3 to 10 percent by weight of the cured composition as a curing accelerator.
Claim 6
Dependent Claim
13 words
A composition as claimed in claim 5 wherein the cycloaliphatic amine is N,N''-aminoethylpiperazine.
Claim 7
Dependent Claim
28 words
A composition as claimed in claim 1 comprising from 3 to 6 percent by weight of the cured composition of an organic solvent as a viscosity lowering agent.
Claim 8
Dependent Claim
18 words
A composition as claimed in claim 7 wherein the organic solvent is toluene, xylene or a mixture thereof.
Claim 9
Dependent Claim
29 words
A composition as claimed in claim 1 comprising an epoxidized unsaturated fatty acid mono ester in an amount of up to 12 percent by weight of the cured composition.
Claim 10
Dependent Claim
85 words
A composition as claimed in claim 1 wherein the urethane modified epoxy resin is the reaction product of A. 100 parts of an epoxy resin being the condensation product of epichlorohydrin and a bisphenol, B. 10 parts of an epoxy resin being the diglycidyl ether of a polypropylene glycol, C. 20 parts of a prepolymer made from a condensation product of glycerol and propylene oxide having a molecular weight of about 2,000 to about 3,000 and toluene diisocyanate, and D. 4 parts of tetraethylene glycol.
Claim 11
Dependent Claim
69 words
A process for preparing a curable epoxide-bitumen composition comprising the composition of claim 1 which comprises mixing two partial compositions, one of the compositions comprising a urethane modified epoxy resin, the other composition comprising a hardener which is a mixture of an aromatic polyamine and a phenolic compound, wherein at least one of said two partial compositions comprises a soft bitumen having a pen value of at least 250.
Claim 12
Dependent Claim
75 words
A process as claimed in claim 11 wherein at least one of the partial composItions comprises at least one additional component which is a non-modified epoxy resin in an amount up to 17 parts, a reactive flexibilizer in an amount up to 30 parts, a curing accelerator in an amount up to 15 parts, an organic solvent in an amount up to 10 parts or a reactive compatibilizer in an amount up to 20 parts.
Claim 13
Dependent Claim
44 words
A process as claimed in claim 11 wherein the partial composition comprising a urethane-modified epoxy resin has a density of 1.1 to 1.2, the partial composition comprising a hardener has a density of 1.0 and partial compositions are mixed in a 1:1 volumetric ratio.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |