US4722953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing bituminous/polymer emulsion and product
Assignee: Davlin Paint Co
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Filing: 1985-10-24
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Granted: 1988-02-02
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Expires: 2005-10-24
Abstract
Abstract The present invention relates to bituminous polymer emulsions and more particularly to a novel method for producing such emulsions to produce a coating which yields superior flexiblity and water resistance. The method of producing the bituminous polymer consists in passing heated asphalt and a heated polymer emulsion through a colloid meal. The resultant emulsion may have up to 75% solids.
Inventors
- 👤 David J. DeRuiter
- 👤 Dennis P. Fairley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/005; C08L; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A method of producing a flexible and water resistant modified asphaltic coating comprising: a. simultaneously passing asphalt heated to about 250° F. and a polymer emulsion of a monomer selected from the group consisting of ethylene/vinyl acetate and an acrylate heated to approximately 145° F. through a colloid mill producing an emulsion of asphalt within the water phase of the polymer emulsion with the product emulsion at a temperature of 160°-170° F.; b. immediately cooling said product emulsion exiting said colloid mill to approximately 120° F.; and c. simultaneously continuously agitating said product emulsion exiting said colloid mill while said product emulsion is cooling until said 120° F. temperature is reached.
Claim 2
Independent Claim
111 words
A method of producing a flexible and water resistant modified asphaltic coating comprising: a. simultaneously passing asphalt heated to about 250° F. and a polymer emulsion of a monomer selected from the group consisting of ethylene/vinyl acetate and an acrylate heated to approximately 145° F. through a colloid mill producing an emulsion of asphalt within the water phase of the polymer emulsion with the product emulsion at a temperature of 160°-170° F.; b. immediately cooling said product emulsion exiting said colloid mill to approximately 120° F.; and c. simultaneously continuously agitating said product emulsion exiting said colloid mill while said product emulsion is cooling until said 120° F. temperature is reached.
Claim 3
Dependent Claim
31 words
A method as claimed in claim 1 including the step of: a. melting a high melting point wax melting at 156° to 165° F. into said asphalt while heating said asphalt.
Claim 4
Dependent Claim
19 words
A method as claimed in claim 1 wherein said emulsion polymer is ethylene/vinyl acetate which includes the structure: ##STR3##
Claim 5
Dependent Claim
48 words
A method as claimed in claim 1 wherein said polymer emulsion consists of a monomer mixture of approximately 65% vinyl acetate, 20% ethylene and 15% (2-ethylhexyl acrylate) polymerized in water and using a surfactant blend of nonionic and anionic surfactants typically and a protective colloid of hydroxylethyl cellulose.
Claim 6
Dependent Claim
21 words
A method as claimed in claim 2 wherein said asphalt and wax is blended in the proportion of 90%-10% by weight.
Claim 7
Dependent Claim
35 words
A method as claimed in claim 2 wherein the ratio of said asphalt in the asphalt/wax blend and solid polymer in the polymer emulsion is 1 to 1 by weight of asphalt to solid polymer.
Claim 8
Dependent Claim
31 words
A method as claimed in claim 1 including the step of adding a defoaming agent to said polymer emulsion after heating and prior to passing said emulsion through the colloid mill.
Claim 9
Dependent Claim
112 words
The flexible and water resistant bituminous/polymer emulsion coating obtained by the process steps comprising a. simultaneously passing asphalt heated to about 250° F. and a polymer emulsion of a monomer selected from the group consisting of ethylene/vinyl acetate and an acrylate heated to approximately 145° F. through a colloid mill producing an emulsion of asphalt within the water phase of the polymer emulsion with the product emulsion at a temperature of 160°-170° F.; b. immediately cooling said product emulsion exiting said colloid mill to approximately 120° F.; and c. simultaneously continuously agitating said product emulsion exiting said colloid mill while said product emulsion is cooling until said 120° F. temperature is reached.
Claim 10
Dependent Claim
112 words
The flexible and water resistant bituminous/polymer emulsion coating obtained by the process steps comprising a. simultaneously passing asphalt heated to about 250° F. and a polymer emulsion of a monomer selected from the group consisting of ethylene/vinyl acetate and an acrylate heated to approximately 145° F. through a colloid mill producing an emulsion of asphalt within the water phase of the polymer emulsion with the product emulsion at a temperature of 160°-170° F.; b. immediately cooling said product emulsion exiting said colloid mill to approximately 120° F.; and c. simultaneously continuously agitating said product emulsion exiting said colloid mill while said product emulsion is cooling until said 120° F. temperature is reached.
Claim 11
Dependent Claim
15 words
The product of claim 8 wherein said emulsion polymer is an aqueous of ethylene/vinyl acetate.
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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) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |