US3909474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Road surface stabilization
Assignee: Pony Industries Inc
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Filing: 1974-01-24
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Granted: 1975-09-30
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Expires: 1994-01-24
Abstract
Abstract Method of road surface stabilization particularly suitable for roads in the Arctic and sub-Arctic regions by admixing the surface aggregate of the road with an aqueous bituminous emulsion wherein the dispersed phase is a bituminous composition containing an elastomeric polymer produced in situ and chemically bound to the bituminous composition thereby providing excellent low temperature properties to the road surface stabilizing composition.
Inventors
- 👤 Alfred E Borchert
- 👤 Albert C Condo
- 👤 Felix C Gzemski
- 👤 John F Mcgrogan
- 👤 Benjamin C Wilbur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:36
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/36; C; C08; C08L; C08L95/00; C08L95/005; E01C7/08; E01C7/18; E01C7/182; E01C7/26; E01C7/265
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
181 words
AN AQUEOUS EMULSION WHICH CURES TO A COMPOSITION HAVING EXCELLENT LOW TEMPERATURE FLEXIBILITY AND DUCTILITY FOR THE STABILIZATION OF THE SURFACE AGGREGATE PARTICLES OF ROADWAYS LOCATED IN ARCTIC AND SUB-ARCTIC REGIONS AND SUBJECTED TO EXTREMELY LOW WINTER TEMPERATURES WHICH COMPOSITION IS NOT DELETERIOUS TO THE THERMAL INSULATION PROPERTIES OF SAID ROADWAY AND WHICH INHIBITS THE TRANSFER OF SAID AGGREGATE PARTICLES TO SURFACES ADJACENT SAID ROADWAY WITH CONSEQUENT DAMAGE TO SAID SURFACES WHICH COMPRISES A BITUMINOUS COMPOSITION COMPRISING AN AIR OXIDEZED CRUDE OIL RESIDUUM HAVING AN INITIAL BOILING POINT ABOVE ABOUT 234*F. AT ONE ATMOSPHERE AND ABOUT 3 TO 20 PARTS OF A POLYUREATHANE PER 100 PARTS OF CRUDE OIL RESIDUUM PRODUCED IN SITU IN SAID BITUMINOUS COMPOSITION FROM A POLYOL HAVING A SUBSTANTIALLY HYDROCARBON BACKBONE STRUCTURE AND WHICH IS SOLUBLE IN SAID CRUDE OIL RESIDUUM AND AN ALIPHATIC, AROMATIC OR ALICYCLIC DIISOCYANATE IN THE PRESENCE OF A SUFFICIENT AMOUNT OF CATALYST TO EFFECT FORMATION OF URETHANE POLYMER, THE RATIO OF POLYOL HYDROXYL GROUPS TO TOTAL ISOCYANATE GROUPS BEING GREATER THAN 1, SAID POLYURETHANE BEING CHEMICALLY BOUND TO SAID AIR OXIDIZED RESIDUUM.
Claim 2
Dependent Claim
181 words
AN AQUEOUS EMULSION WHICH CURES TO A COMPOSITION HAVING EXCELLENT LOW TEMPERATURE FLEXIBILITY AND DUCTILITY FOR THE STABILIZATION OF THE SURFACE AGGREGATE PARTICLES OF ROADWAYS LOCATED IN ARCTIC AND SUB-ARCTIC REGIONS AND SUBJECTED TO EXTREMELY LOW WINTER TEMPERATURES WHICH COMPOSITION IS NOT DELETERIOUS TO THE THERMAL INSULATION PROPERTIES OF SAID ROADWAY AND WHICH INHIBITS THE TRANSFER OF SAID AGGREGATE PARTICLES TO SURFACES ADJACENT SAID ROADWAY WITH CONSEQUENT DAMAGE TO SAID SURFACES WHICH COMPRISES A BITUMINOUS COMPOSITION COMPRISING AN AIR OXIDEZED CRUDE OIL RESIDUUM HAVING AN INITIAL BOILING POINT ABOVE ABOUT 234*F. AT ONE ATMOSPHERE AND ABOUT 3 TO 20 PARTS OF A POLYUREATHANE PER 100 PARTS OF CRUDE OIL RESIDUUM PRODUCED IN SITU IN SAID BITUMINOUS COMPOSITION FROM A POLYOL HAVING A SUBSTANTIALLY HYDROCARBON BACKBONE STRUCTURE AND WHICH IS SOLUBLE IN SAID CRUDE OIL RESIDUUM AND AN ALIPHATIC, AROMATIC OR ALICYCLIC DIISOCYANATE IN THE PRESENCE OF A SUFFICIENT AMOUNT OF CATALYST TO EFFECT FORMATION OF URETHANE POLYMER, THE RATIO OF POLYOL HYDROXYL GROUPS TO TOTAL ISOCYANATE GROUPS BEING GREATER THAN 1, SAID POLYURETHANE BEING CHEMICALLY BOUND TO SAID AIR OXIDIZED RESIDUUM.
Claim 3
Dependent Claim
32 words
The aqueous emulsion according to claim 1, wherein said hydroxyl-terminated polymer has a number average molecular weight of about 3000 with an average of from 2.2 to 2.5 hydroxyl groups per mole.
Claim 4
Dependent Claim
32 words
The aqueous emulsion according to claim 2, wherein the ratio of hydroxyl groups in said hydroxyl-terminated polymer to isocyanate groups in said polyisocyanate is in the range of from 1.1:1 to 5:1.
Claim 5
Dependent Claim
26 words
The aqueous emulsion according to claim 1, wherein said air oxidized crude oil residuum consists of the 70 percent by volume bottoms fraction of said crude.
Claim 6
Dependent Claim
44 words
The aqueous emulsion according to claim 1, wherein the amount of said bituminous composition containing said polyurethane ranges from 35 to 65 weight percent and the water ranges from 65 to 35 weight percent based on the total of 100 weight percent of emulsion.
Claim 7
Dependent Claim
159 words
The method for the production of the aqueous emulsion of claim 1, which comprises admixing said air oxidized crude oil residuum containing hydroxyl groups with an hydroxyl-terminated hydrocarbon polymer which is soluble therein and compatible therewith and a sufficient amount of catalyst suitable for the production of urethane polymer at a temperature sufficiently high to effect efficient mixing but below the polymerization temperature of the hydroxyl-terminated hydrocarbon polymer, thereafter admixing at an elevated temperature said oxidized residuumpolymer mixture with an aliphatic, aromatic or alicyclic diisocyanate to produce an elastomeric urethane polymer in said oxidized residuum and chemially bound thereto, and hydroxyl-terminated hydrocarbon polymer and diisocyanate being present in an amount sufficient to produce about 3 to 20 parts of polyurethane per 100 parts of crude oil residuum and thereafter forming an aqueous emulsion of the residuum-polymer composition at an elevated temperature in the presence of a sufficient amount of an anionic or cationic emulsifier to produce a stable emulsion.
Claim 8
Dependent Claim
58 words
The method according to claim 6, wherein said hydroxyl-terminated polymer has a number average molecular weight of about 3000 with an average of from 2.2 to 2.5 hydroxyl groups per mole and is admixed in said oxidized residuum component at a temperature in the range of from 140* F. to 160* F. for from 1/2 to 4 hours.
Claim 9
Dependent Claim
33 words
The method according to claim 6, wherein said diisocyanate is admixed with said oxidized residuum-polymer mixture at a temperature in the range of from 250*F. to 300*F. for from 1/2 to 4 hours.
Claim 10
Dependent Claim
12 words
The method according to claim 8, wherein said catalyst is dibutyltin dilaurate.
Claim 11
Dependent Claim
12 words
The method according to claim 8, wherein said catalyst is stannous octoate.
Claim 12
Dependent Claim
58 words
The method for the production of the aqueous emulsion of claim 1, which comprises heating said bituminous composition to a temperature of from 225*F. to 275* F., heating a water solution of a cationic emulsifier and hydrochloric acid to a temperature of 155*F. to 170*F. and passing said heated bituminous component and water solution through a colloid mill.
Claim 13
Dependent Claim
38 words
The method according to claim 11, wherein the amount of said bituminous component ranges from 35 to 65 weight percent and the water ranges from 65 to 35 weight percent based on the total weight of the mixture.
Claim 14
Dependent Claim
51 words
The method according to claim 11, wherein said bituminous component contains a crude oil residuum consisting of the 70 percent by volume bottoms fraction of said crude which has been air oxidized sufficiently to give an oxidized residuum having a Brookfield viscosity of from 100 centipoise to 2000 centipoise at 200*F.
Claim 15
Dependent Claim
56 words
The method for the stabilization of the surface aggregate particles of roadways located in the Arctic and sub-Arctic regions whereby said aggregate particles are inhibited from being transferred to surfaces adjacent said roadway with consequent damage to said surfaces which comprises admixing the surface aggregatE particles of said roadway with the aqueous emulsion of claim 1.
Claim 16
Dependent Claim
55 words
The method according to claim 14, wherein said emulsion is produced by heating said bituminous composition to a temperature of from 225*F. to 275*F., heating a water solution of a cationic emulsifier and hydrochloric acid to a temperature of 155*F. to 170*F. and passing said heated bituminous component and water solution through a colloid mill.
Claim 17
Dependent Claim
14 words
The roadway having its surface aggregate particles stabilized by the composition of claim 1.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |