Patent US4172821A successfully refreshed from Google Patents.
US4172821A
Expired / Lapsed
US
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Bitumen emulsions
Assignee: European Vinyls Corp Technology AG
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Filing: 1978-04-12
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Granted: 1979-10-30
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Expires: 1998-04-12
Abstract
Abstract An aqueous emulsion of controlled stability is derived from a cationic bitumen emulsion and a vinyl chloride polymer made by aqueous emulsion or microsuspension polymerization using an anionic emulsifying agent. The emulsion is preferably made by adding additional cationic emulsifying agent to the bitumen emulsion before admixture with the vinyl chloride polymer (which can be in latex or spray-dried form). A method for making the emulsion and a method of road-surfacing using the emulsion are also claimed.
Inventors
- 👤 Barry D. Bloombaum
- 👤 Michael J. Hitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:15
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
76 words
An aqueous emulsion of controlled stability which is stable to precipitation until contacted with a road surface or an aggregate of the type used in road surfacing, wherein said emulsion is derived from a mixture of a cationic bitumen aqueous solution containing an amount effective for controlled stability of at least one cationic emulsifying agent and at least one vinyl chloride polymer made by aqueous emulsion or microsuspension polymerization using at least one anionic emulsifying agent.
Claim 2
Dependent Claim
76 words
An aqueous emulsion of controlled stability which is stable to precipitation until contacted with a road surface or an aggregate of the type used in road surfacing, wherein said emulsion is derived from a mixture of a cationic bitumen aqueous solution containing an amount effective for controlled stability of at least one cationic emulsifying agent and at least one vinyl chloride polymer made by aqueous emulsion or microsuspension polymerization using at least one anionic emulsifying agent.
Claim 3
Dependent Claim
33 words
An aqueous emulsion according to claim 1 wherein the amount of said at least one vinyl chloride polymer in said emulsion is 1 to 10% by weight based on the dry bitumen weight.
Claim 4
Independent Claim
84 words
A method of preparing an aqueous emulsion of controlled stability of bitumen and at least one vinyl chloride polymer which is stable to precipitation until contacted with a road surface or an aggregate of the type used in road surfacing, which method comprises mixing a cationic bitumen aqueous emulsion containing an amount effective for controlled stability of at least one cationic emulsifying agent and at least one vinyl chloride polymer made by aqueous emulsion or microsuspension polymerization using at least one anionic emulsifying agent.
Claim 5
Independent Claim
84 words
A method of preparing an aqueous emulsion of controlled stability of bitumen and at least one vinyl chloride polymer which is stable to precipitation until contacted with a road surface or an aggregate of the type used in road surfacing, which method comprises mixing a cationic bitumen aqueous emulsion containing an amount effective for controlled stability of at least one cationic emulsifying agent and at least one vinyl chloride polymer made by aqueous emulsion or microsuspension polymerization using at least one anionic emulsifying agent.
Claim 6
Dependent Claim
43 words
A method according to claim 3 wherein said amount of said at least one cationic emulsifying agent is incorporated into the bitumen emulsion by adding the total amount of said cationic emulsifying agent to be used during the preparation of the bitumen emulsion.
Claim 7
Dependent Claim
83 words
A method according to claim 3 wherein said amount of said cationic emulsifying agent is incorporated into the bitumen emulsion by adding a portion of the total amount to said at least one cationic emulsifying agent to be used during the preparation of the bitumen emulsion and adding the remaining portion of the total amount of said cationic emulsifying agent to be used subsequent to the preparation of the bitumen emulsion but before admixture of the bitumen emulsion with said vinyl chloride polymer.
Claim 8
Dependent Claim
27 words
A method according to claim 3 wherein said vinyl chloride polymer is incorporated into the bitumen emulsion while it is in the form of an aqueous latex.
Claim 9
Dependent Claim
27 words
The method according to claim 3 wherein said vinyl chloride polymer is incorporated into the bitumen emulsion while it is in the form of a dried polymer.
Claim 10
Dependent Claim
32 words
A method according to claim 3 wherein said amount of said vinyl chloride polymer that is incorporated into the emulsion is 1 to 10% by weight based on the dry bitumen weight.
Claim 11
Independent Claim
95 words
A method of road-surfacing comprising applying to a road surface an aqueous emulsion of controlled stability of bitumen and at least one vinyl chloride polymer which is stable to precipitation until contacted with a road surface or an aggregate of the type used in road surfacing, wherein said emulsion is derived from a mixture of a cationic bitumen aqueous emulsion containing an amount effective for controlled stability of at least one cationic emulsifying agent and at least one vinyl chloride polymer made by aqueous emulsion or microsuspension polymerization using at least one anionic emulsifying agent.
Claim 12
Independent Claim
95 words
A method of road-surfacing comprising applying to a road surface an aqueous emulsion of controlled stability of bitumen and at least one vinyl chloride polymer which is stable to precipitation until contacted with a road surface or an aggregate of the type used in road surfacing, wherein said emulsion is derived from a mixture of a cationic bitumen aqueous emulsion containing an amount effective for controlled stability of at least one cationic emulsifying agent and at least one vinyl chloride polymer made by aqueous emulsion or microsuspension polymerization using at least one anionic emulsifying agent.
Claim 13
Dependent Claim
56 words
A method according to claim 9 wherein the emulsion applied to the road surface has been made by a method in which said effective amount of said cationic emulsifying agent is incorporated into the bitumen emulsion by adding the total amount of said cationic emulsifying agent to be used during the preparation of the bitumen emulsion.
Claim 14
Dependent Claim
95 words
A method according to claim 9 wherein the emulsion applied to the road surface has been made by a method in which said amount of said cationic emulsifying agent is incorporated into the bitumen emulsion by adding a portion of the total amount of said cationic emulsifying agent to be used during the preparation of the bitumen emulsion and adding the remaining portion of the total amount of said cationic emulsifying agent to be used subsequent to the preparation of the bitumen emulsion but before admixture of the bitumen emulsion with said vinyl chloride polymer.
Claim 15
Dependent Claim
27 words
A method according to claim 9 wherein said vinyl chloride polymer is incorporated into the bitumen emulsion while it is in the form of an aqueous latex.
Claim 16
Dependent Claim
27 words
A method according to claim 9 wherein said vinyl chloride polymer is incorporated into the bitumen emulsion while it is in the form of a dried polymer.
Claim 17
Dependent Claim
31 words
A method according to claim 9 wherein the amount of said vinyl chloride polymer used in the applied emulsion is 1 to 10% by weight based on the dry bitumen weight.
Claim 18
Dependent Claim
27 words
An aqueous emulsion according to claim 1 wherein the amount of said cationic emulsifying agent is 0.5 to 1.5% by weight based on the bitumen solids content.
Claim 19
Dependent Claim
26 words
A method according to claim 3 wherein the amount of said cationic emulsifying agent is 0.5 to 1.5% by weight based on the bitumen solids content.
Claim 20
Dependent Claim
26 words
A method according to claim 9 wherein the amount of said cationic emulsifying agent is 0.5 to 1.5% by weight based on the bitumen solids content.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |