CA1162006A - Asphalt primer composition - Google Patents
Asphalt primer compositionInfo
- Publication number
- CA1162006A CA1162006A CA000369489A CA369489A CA1162006A CA 1162006 A CA1162006 A CA 1162006A CA 000369489 A CA000369489 A CA 000369489A CA 369489 A CA369489 A CA 369489A CA 1162006 A CA1162006 A CA 1162006A
- Authority
- CA
- Canada
- Prior art keywords
- asphalt
- weight percent
- water
- tall oil
- astm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
ABSTRACT
"ASPHALT PRIMER COMPOSITION"
An asphalt primer consisting of a dispersion of paving asphalt, medium-light petroleum distillate, dis-persing agents and water. The dispersing agent is an unsaponified tall oil.
"ASPHALT PRIMER COMPOSITION"
An asphalt primer consisting of a dispersion of paving asphalt, medium-light petroleum distillate, dis-persing agents and water. The dispersing agent is an unsaponified tall oil.
Description
~1~2~3~6 BACKGROUND OF THE INVENTION
Asphalt primers are asphalt-containing liquids which do not contain aggregate or other solid fillers, and which find use as rapidly applied surfacing agents for sand, gravel, or dirt roadways.
Asphalt primers are valued for their ability to penetrate the substrate of particulate matter and rapidly cure to bind the particles of the substrate into a wind and water resistant surface of some depth.
Asphalt primers are typically emulsions, cutback asphalts, or road oils. By cutback asphalt is meant an asphalt containing a hydrocarbon diluent, comprising roughly one-half the total product, to reduce the asphalt to spraying viscosity. The light hydrocarbon distillate which is employed as diluent, being flammable, poses safety hazards during manufacture and use. Furthermore, as the primer cures part of the diluent evaporates into the atmosphere causing air pollution and wasting hydrocarbons. Asphalt emulsions are of either the oil-in-water type, or of the water-in-oil (invert emulsion) type. Oil-in-water emulsions are normally of the cationic or anionic variety depending on the choice of a cationic or anionic emulsifier. Tall oil, a complex mixture of rosin and fatty acids, is saponified by reaction with metallic hydroxides or metallic oxides to produce a soap. The tall oil soap is a known anionic emulsifying agent for asphalt. Invert emulsions, on the other hand, depend on the dlspersing agent to disperse a small amount of water (usually 2-15 weight percent water) in a much larger amount of asphalt. Oil-soluble soaps are the most common agents used to form invert emulsions although inorganic powders are also used.
;`5~"~5 SUMMARY OF THE INVENTION
An invert water-in-oil asphalt emulsion finding use on roadways composed of particulate materials, such as sand, gravel, or dirt, consisting of a dispersion of paving asphalt, medium-light petroleum distillate dispersing agents and water wherein the dispersing agent comprises an effective amount of unsaponified tall oil. The asphalt emulsion comprises about 50 to 70 weight percent of liquid asphalt, about la -002 48-28 weight percent water and about 0.5-4 weight percent of 003 tall oil.
004 DETAILED D~SCRIPTIO~I OF PREFERRED EMBODI~IEI`~TS
. . _ .
005 The asphalt primer of the present invention comprises 006 a water-in-oil emulsion of a liquid asphalt and water dispersed 007 by a small amount of tall oil. The asphalt primer penetrates 008 quickly and deeply into the particulate materials normally 009 found in rural roadways, such as sand, dirt and gravel. Sur-010 prisingly, the asphalt primer penetrates quickly into either 011 wet or dry gravel and does not tend to run off. It is storage 012 stable, i.e., no visible separation of the emulsion occurs even 013 over a five day period, it is safe to use and handle, i.e., has 014 a high flash point, preferably greater than about 48C, and has 015 less hydrocarbon to pollute the atmosphere and be wasted.
016 The liquid asphalt finding use within the scope of 017 the present invention is composed of a cutback asphalt, i.e., 018 an asphalt diluted by addition of a hydrocarbon oil. The 019 liquid asphalt is composed of about 60-80 weight percent, more 020 preferably about 67 weight percent, of an asphalt having 021 penetration of about 85-100 at 25C, 5S, as measured by ASTM
022 D-5, and containing about 40-20 weight percent, and most 023 preferably about 33 weight percent of a hydrocarbon oil. The 024 liquid asphalt preferably has an ~STM D-2170 viscosity less 025 than about 75 cs and an ASTM D-1310 flash point greater than 026 about 100F. The hydrocarbon oil may be 100~ paraffinic but is 027 preferably a paraffinic-naphthenic oil containing only a minor 028 amount of aromatics. The hydrocarbon oil has a specific 029~ gravity of about 0.6~0.9 (15.5C/15.5C), ASTM D-287, more 030 preferably about 0.8.
031 Tall oil is af by-product of the sulfate pulping 032 process. It is a mixture of rosin and fatty acids with a minor 033 amount of unsaponifiable material. For the chemistry, process-034 ing and other information about tall oil see Kirk-Othmer, 035 Encyclopedia of Chemical Technology, 2nd edition, Volume 19 036 from page 614. The tall oil finding use within the scope of 037 the present invention will contain about 30-90 weight percent ~ ,.~, , 3L~L62~3~6 001 -3~
002 fatty acids, and preferably more than 50 weight percent fatty 003 acids the balance being mainly rosin acids in admixture with 004 minor amounts of unsaponifiable materials of unknown chemical OOS composition. The fatty acids in tall oil consist mainly of 006 oleic, linoleic, conjugated linoleic, palmitic, stearic, 007 palmitoleic, arachidic, and behenic acids. Commercially avail-008 able tall oils include those of the following compositions:
009 palmitic (0.1-5.3%); palmitoleic (0.1-2.1%); stearic (2.1-010 2.6~); oleic (39.3-49.5%); linoleic (38.1-41.4~); eicosanoic 011 (1.2-1.9~); eicosadionic (0.5-3.2%); eicosatrienoic (0.4-2.9~);
012 and behenic (0.4-0.9%) acids, with the balance being rosin 013 acids, unidentified acids and unsaponifiable materials.
014 In the making of the asphalt primer of the present OlS invention one normally adds about 0.5-4 weight percent tall oil 016 based on the final composition, preferably about 1-3 weight 017 percent tall oil to the liquid asphalt which itself will com-018 prise about 50-7Q weight percent of the final composition, pref-019 erably about 55-65 weight percent. The asphalt-tall oil mix-020 ture is then added with about 48-28 weight percent water based 021 on final composition to a mixing vessel and the materials are 022 mixed to homogeneity, e.g., by a high speed propeller stirrer.
023 The mixture is agitated periodically and heat is kept to a 024 minimum, e.g., 90-100F (32-38C). The asphalt primer has a 025 viscosity of about 80-175 sec. (saybolt viscosity at 50C).
026 The asphalt is normally applied for purposes of 027 priming roadways composed of particulate material, at a 028 concentration of approximately 0.1-0.5 gallons of asphalt 029 primer per square yard of surface.
030 Exemplification 031 A liquid asphalt having the properties listed in 032 Table I, and consisting of 33 weight percent of solvent having 033 the properties listed in Table II and 67~ of an asphalt having 034 a penetration of 85-100, was used as base stock for an asphalt 035 primer of the present invention.
1162~
. .
004 LIQUID ASPE~ALT
_ 005 Gravity, Specific, 60F ASTM D-1250 0.94 006 (15.56C) 008 Viscosity at 140F (60C), CS ASTM D-2170 75 (Max.) 010 Flash Point, Tag, OC, F ASTM D-1370 100 (Min.) 011 (38C) 013 Distillation, IBP, F ASTM D-402 360 (Min.) 014 (182C) 016 % at 500F (260C) of T~ 80 (Min.) 017 to 680F (360C) 019 % at 600F (315.3C) of TD 95 (Min.) 020 to 680F (360C) 022 % Residue at 680F (360C) 66-68 023 (by weight) 025 Distillation Residue:
027 Softening Point, F ASTM D-35107 (Max.) 028 (42C) 030 Pen, 77F, 100 g. 5s ASTM D-5120 (Max.) 032 Ductility, 77F (25C), cm ASTM D-113 150 (Min.) :
..~".~, 1.
!~
002 TABLI. II
004 CHARACTERIS~IC METHOD REFERENCE TYPICAL RESULT
_ _ 005 Appearance Visual Inspection Light & Clear, 006 no residue 007 Color, Saybolt ASTM D-156 +30 008 Gravity, API ASTM D-287 43.0 009 Specific Gravity ASTM D-287 0.788 010 60/60F (15.5/15.5C) 011 ~lash Point, Tag C.C. ASTM D-56 110F (43.5C) 012 Distillation Range ASTM D-86 013 IBP 311F (155C) 014 10% Vol. 325F (162.5C) 015 50% Vol. 336F (169C) 016 90% Vol. 359F ~181.5C) 017 DP 376F (191C) 013 Aniline Point ASTM D-1012 130F (54C) 019 Kauri Butanol Value ASTM D-1133 38 020 Doctor Test GCM 132 Nesgative 021 Sulfur ppm GCM 217 1.2 022 Copper Corrosion ASTM 130 023 3 hr at 212F (100C) 024 Compositional Analysis GCM 170 025 % vol~
026 Paraffins 44.7 027 Olefins 0.1 028 Naphthenes 40.2 029 Aromatics (total) 15.1 030 Benzene 0.1 031 Aromatics C8 & higher 14.8 ~æ~d~5;6~rl~d5~5~
~ 6-002 In the manufacture of the asphalt primer, a small 003 amount of tall oil was blended into the base stock and water 004 was added in a dispersion tank~ A typical analysis of the 005 asphalt primer was shown in Table III and the product formula 006 is shown in Table IV.
007 T~BLE III
009 Typical product analysis of Asphalt Primer 011 Flash Point (Open Tag) C -------------------------55 012 Viscosity (SF) 50C S ------------------------130 013 Residue by distillation, % mass. --------------------------42 014 Oil portion of distillate, % volume ----------------------24 01S Settlement in 5 days ------------------no visible separation 016 Test on residue from distillation to 360C
017 Penetration, 25C, 100 g, 5S --------------~-------------140 u19 TABLE IV
021 ~ilograms Percent 022 Per Liter by Weight 023 Liquid Asphalt 0.5770 60.5 024 Tall Oill 0.0143 1.5 u25 Water 0.3624 38.0 026 0.9537 100 027 1. Typically a tall oil containing about 50% or more fatty 028 acids (typically, oleic and linoleic acids).
029 The asphalt primer of Tables I-IV was studied in 030 penetration and water resistance in comparison to an asphalt 031 primer which was merely a cutback asphalt containing light 032 hydrocarbon distillate.,~ One-half inch gravel and screenings 033 were used for these tests. The gradations of the gravel are 034 shown in Table V.
~16~
001 ~7-002 -' TA~L~ V
003 Gradation of 12" Grà'vel 004 ( 1/2" 98 005 ( 3/8" 89 006 ( #4 69 007 ( #~, 61 008 Gradation ~ Passing ~ ( #16 53 009 ( #30 42 010 ( #50 26 011 ( ~100 11 012 ( #200 6 013 In these tests the relative rapidity of penetration 014 of the asphalt primer into the particulate matter was measured 015 as well as the depth and uniformity of penetration. It was 016 observed that the asphalt primer of the present invention 017 penetrates as quickly and as deeply as an asphalt primer solely 018 composed of cutback asphalt into either wet or dry gravel, but 019 penetrates faster into the wet highly compacted dense surface 020 of the screenings. We also observed in all specimens that the 021 cutback asphalt primer tended to spread on the surface indicat-022 ing, potential runoff, whereas the asphalt primer of the present 023 invention penetrated straight down. In order to compare the 024 early water resistance of the asphalt primers the specimens 025 were placed under gentle tap water for 5 minutes. Close 026 examination shows that the asphalt primer of the present inven-027 tion performs as well as the cutback asphalt primer without re-028 emulsification or wash off.
029 In another experiment the asphalt primer of the 030 present invention was field tes-ted by spraying the primer on a 031 dirt roadway at the rat,e~of 0.3 gallons per square yard and 032 then sanding the surface with 20 pounds per square yard of 033 sand. Penetration of the asphalt primer was observed to be 03~ excellent (estimated at 1/2") with penetration of the gravel 035 substrate in 10-20 minutes.
Asphalt primers are asphalt-containing liquids which do not contain aggregate or other solid fillers, and which find use as rapidly applied surfacing agents for sand, gravel, or dirt roadways.
Asphalt primers are valued for their ability to penetrate the substrate of particulate matter and rapidly cure to bind the particles of the substrate into a wind and water resistant surface of some depth.
Asphalt primers are typically emulsions, cutback asphalts, or road oils. By cutback asphalt is meant an asphalt containing a hydrocarbon diluent, comprising roughly one-half the total product, to reduce the asphalt to spraying viscosity. The light hydrocarbon distillate which is employed as diluent, being flammable, poses safety hazards during manufacture and use. Furthermore, as the primer cures part of the diluent evaporates into the atmosphere causing air pollution and wasting hydrocarbons. Asphalt emulsions are of either the oil-in-water type, or of the water-in-oil (invert emulsion) type. Oil-in-water emulsions are normally of the cationic or anionic variety depending on the choice of a cationic or anionic emulsifier. Tall oil, a complex mixture of rosin and fatty acids, is saponified by reaction with metallic hydroxides or metallic oxides to produce a soap. The tall oil soap is a known anionic emulsifying agent for asphalt. Invert emulsions, on the other hand, depend on the dlspersing agent to disperse a small amount of water (usually 2-15 weight percent water) in a much larger amount of asphalt. Oil-soluble soaps are the most common agents used to form invert emulsions although inorganic powders are also used.
;`5~"~5 SUMMARY OF THE INVENTION
An invert water-in-oil asphalt emulsion finding use on roadways composed of particulate materials, such as sand, gravel, or dirt, consisting of a dispersion of paving asphalt, medium-light petroleum distillate dispersing agents and water wherein the dispersing agent comprises an effective amount of unsaponified tall oil. The asphalt emulsion comprises about 50 to 70 weight percent of liquid asphalt, about la -002 48-28 weight percent water and about 0.5-4 weight percent of 003 tall oil.
004 DETAILED D~SCRIPTIO~I OF PREFERRED EMBODI~IEI`~TS
. . _ .
005 The asphalt primer of the present invention comprises 006 a water-in-oil emulsion of a liquid asphalt and water dispersed 007 by a small amount of tall oil. The asphalt primer penetrates 008 quickly and deeply into the particulate materials normally 009 found in rural roadways, such as sand, dirt and gravel. Sur-010 prisingly, the asphalt primer penetrates quickly into either 011 wet or dry gravel and does not tend to run off. It is storage 012 stable, i.e., no visible separation of the emulsion occurs even 013 over a five day period, it is safe to use and handle, i.e., has 014 a high flash point, preferably greater than about 48C, and has 015 less hydrocarbon to pollute the atmosphere and be wasted.
016 The liquid asphalt finding use within the scope of 017 the present invention is composed of a cutback asphalt, i.e., 018 an asphalt diluted by addition of a hydrocarbon oil. The 019 liquid asphalt is composed of about 60-80 weight percent, more 020 preferably about 67 weight percent, of an asphalt having 021 penetration of about 85-100 at 25C, 5S, as measured by ASTM
022 D-5, and containing about 40-20 weight percent, and most 023 preferably about 33 weight percent of a hydrocarbon oil. The 024 liquid asphalt preferably has an ~STM D-2170 viscosity less 025 than about 75 cs and an ASTM D-1310 flash point greater than 026 about 100F. The hydrocarbon oil may be 100~ paraffinic but is 027 preferably a paraffinic-naphthenic oil containing only a minor 028 amount of aromatics. The hydrocarbon oil has a specific 029~ gravity of about 0.6~0.9 (15.5C/15.5C), ASTM D-287, more 030 preferably about 0.8.
031 Tall oil is af by-product of the sulfate pulping 032 process. It is a mixture of rosin and fatty acids with a minor 033 amount of unsaponifiable material. For the chemistry, process-034 ing and other information about tall oil see Kirk-Othmer, 035 Encyclopedia of Chemical Technology, 2nd edition, Volume 19 036 from page 614. The tall oil finding use within the scope of 037 the present invention will contain about 30-90 weight percent ~ ,.~, , 3L~L62~3~6 001 -3~
002 fatty acids, and preferably more than 50 weight percent fatty 003 acids the balance being mainly rosin acids in admixture with 004 minor amounts of unsaponifiable materials of unknown chemical OOS composition. The fatty acids in tall oil consist mainly of 006 oleic, linoleic, conjugated linoleic, palmitic, stearic, 007 palmitoleic, arachidic, and behenic acids. Commercially avail-008 able tall oils include those of the following compositions:
009 palmitic (0.1-5.3%); palmitoleic (0.1-2.1%); stearic (2.1-010 2.6~); oleic (39.3-49.5%); linoleic (38.1-41.4~); eicosanoic 011 (1.2-1.9~); eicosadionic (0.5-3.2%); eicosatrienoic (0.4-2.9~);
012 and behenic (0.4-0.9%) acids, with the balance being rosin 013 acids, unidentified acids and unsaponifiable materials.
014 In the making of the asphalt primer of the present OlS invention one normally adds about 0.5-4 weight percent tall oil 016 based on the final composition, preferably about 1-3 weight 017 percent tall oil to the liquid asphalt which itself will com-018 prise about 50-7Q weight percent of the final composition, pref-019 erably about 55-65 weight percent. The asphalt-tall oil mix-020 ture is then added with about 48-28 weight percent water based 021 on final composition to a mixing vessel and the materials are 022 mixed to homogeneity, e.g., by a high speed propeller stirrer.
023 The mixture is agitated periodically and heat is kept to a 024 minimum, e.g., 90-100F (32-38C). The asphalt primer has a 025 viscosity of about 80-175 sec. (saybolt viscosity at 50C).
026 The asphalt is normally applied for purposes of 027 priming roadways composed of particulate material, at a 028 concentration of approximately 0.1-0.5 gallons of asphalt 029 primer per square yard of surface.
030 Exemplification 031 A liquid asphalt having the properties listed in 032 Table I, and consisting of 33 weight percent of solvent having 033 the properties listed in Table II and 67~ of an asphalt having 034 a penetration of 85-100, was used as base stock for an asphalt 035 primer of the present invention.
1162~
. .
004 LIQUID ASPE~ALT
_ 005 Gravity, Specific, 60F ASTM D-1250 0.94 006 (15.56C) 008 Viscosity at 140F (60C), CS ASTM D-2170 75 (Max.) 010 Flash Point, Tag, OC, F ASTM D-1370 100 (Min.) 011 (38C) 013 Distillation, IBP, F ASTM D-402 360 (Min.) 014 (182C) 016 % at 500F (260C) of T~ 80 (Min.) 017 to 680F (360C) 019 % at 600F (315.3C) of TD 95 (Min.) 020 to 680F (360C) 022 % Residue at 680F (360C) 66-68 023 (by weight) 025 Distillation Residue:
027 Softening Point, F ASTM D-35107 (Max.) 028 (42C) 030 Pen, 77F, 100 g. 5s ASTM D-5120 (Max.) 032 Ductility, 77F (25C), cm ASTM D-113 150 (Min.) :
..~".~, 1.
!~
002 TABLI. II
004 CHARACTERIS~IC METHOD REFERENCE TYPICAL RESULT
_ _ 005 Appearance Visual Inspection Light & Clear, 006 no residue 007 Color, Saybolt ASTM D-156 +30 008 Gravity, API ASTM D-287 43.0 009 Specific Gravity ASTM D-287 0.788 010 60/60F (15.5/15.5C) 011 ~lash Point, Tag C.C. ASTM D-56 110F (43.5C) 012 Distillation Range ASTM D-86 013 IBP 311F (155C) 014 10% Vol. 325F (162.5C) 015 50% Vol. 336F (169C) 016 90% Vol. 359F ~181.5C) 017 DP 376F (191C) 013 Aniline Point ASTM D-1012 130F (54C) 019 Kauri Butanol Value ASTM D-1133 38 020 Doctor Test GCM 132 Nesgative 021 Sulfur ppm GCM 217 1.2 022 Copper Corrosion ASTM 130 023 3 hr at 212F (100C) 024 Compositional Analysis GCM 170 025 % vol~
026 Paraffins 44.7 027 Olefins 0.1 028 Naphthenes 40.2 029 Aromatics (total) 15.1 030 Benzene 0.1 031 Aromatics C8 & higher 14.8 ~æ~d~5;6~rl~d5~5~
~ 6-002 In the manufacture of the asphalt primer, a small 003 amount of tall oil was blended into the base stock and water 004 was added in a dispersion tank~ A typical analysis of the 005 asphalt primer was shown in Table III and the product formula 006 is shown in Table IV.
007 T~BLE III
009 Typical product analysis of Asphalt Primer 011 Flash Point (Open Tag) C -------------------------55 012 Viscosity (SF) 50C S ------------------------130 013 Residue by distillation, % mass. --------------------------42 014 Oil portion of distillate, % volume ----------------------24 01S Settlement in 5 days ------------------no visible separation 016 Test on residue from distillation to 360C
017 Penetration, 25C, 100 g, 5S --------------~-------------140 u19 TABLE IV
021 ~ilograms Percent 022 Per Liter by Weight 023 Liquid Asphalt 0.5770 60.5 024 Tall Oill 0.0143 1.5 u25 Water 0.3624 38.0 026 0.9537 100 027 1. Typically a tall oil containing about 50% or more fatty 028 acids (typically, oleic and linoleic acids).
029 The asphalt primer of Tables I-IV was studied in 030 penetration and water resistance in comparison to an asphalt 031 primer which was merely a cutback asphalt containing light 032 hydrocarbon distillate.,~ One-half inch gravel and screenings 033 were used for these tests. The gradations of the gravel are 034 shown in Table V.
~16~
001 ~7-002 -' TA~L~ V
003 Gradation of 12" Grà'vel 004 ( 1/2" 98 005 ( 3/8" 89 006 ( #4 69 007 ( #~, 61 008 Gradation ~ Passing ~ ( #16 53 009 ( #30 42 010 ( #50 26 011 ( ~100 11 012 ( #200 6 013 In these tests the relative rapidity of penetration 014 of the asphalt primer into the particulate matter was measured 015 as well as the depth and uniformity of penetration. It was 016 observed that the asphalt primer of the present invention 017 penetrates as quickly and as deeply as an asphalt primer solely 018 composed of cutback asphalt into either wet or dry gravel, but 019 penetrates faster into the wet highly compacted dense surface 020 of the screenings. We also observed in all specimens that the 021 cutback asphalt primer tended to spread on the surface indicat-022 ing, potential runoff, whereas the asphalt primer of the present 023 invention penetrated straight down. In order to compare the 024 early water resistance of the asphalt primers the specimens 025 were placed under gentle tap water for 5 minutes. Close 026 examination shows that the asphalt primer of the present inven-027 tion performs as well as the cutback asphalt primer without re-028 emulsification or wash off.
029 In another experiment the asphalt primer of the 030 present invention was field tes-ted by spraying the primer on a 031 dirt roadway at the rat,e~of 0.3 gallons per square yard and 032 then sanding the surface with 20 pounds per square yard of 033 sand. Penetration of the asphalt primer was observed to be 03~ excellent (estimated at 1/2") with penetration of the gravel 035 substrate in 10-20 minutes.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An invert water-in-oil asphalt emulsion consisting of a dispersion of paving asphalt, medium-light petroleum distillate, dispersing agents, and water, wherein the dispersive agent comprises an effective amount of unsaponified tall oil.
2. An invert asphalt emulsion according to Claim 1 comprising about 48-28 weight percent water, about 50-70 weight percent liquid asphalt, and about 0.5-4 weight percent tall oil.
3. An invert asphalt emulsion according to Claim 2 wherein said liquid asphalt comprises about 60-80 weight percent of an asphalt having a penetration of about 85-100 at 25°C and about 40-20 weight percent of a hydrocarbon oil of about 0.6-0.9 specific gravity.
4. An invert asphalt emulsion comprising a mixture of rosin and fatty acids as the dispersant and consisting of about 0.5-4 weight percent tall oil, about 50-70 weight percent liquid asphalt and about 48-28 weight percent water wherein said tall oil comprises a mixture of rosin acids and about 30-90 weight percent fatty acids.
5. An asphalt primer for roadways composed of particulate materials comprising about 50-70 weight percent of normally liquid asphalt having an ASTM D-2170 viscosity less than about 75 cs and an ASTM D-1310 flash point greater than about 100°F, about 48-28 weight percent water and about 0.5-4 weight percent tall oil.
6. An asphalt primer according to Claim 5 wherein said liquid asphalt is a cutback asphalt and comprises about 60-80 weight percent of asphalt and about 40-20 weight percent of a hydrocarbon oil having an ASTM D-287 specific gravity (15.5°C/
15.5°C) of about 0.8 and comprising paraffins and naphthenes.
15.5°C) of about 0.8 and comprising paraffins and naphthenes.
7. A method of priming roadways composed of particulate material comprises applying the asphalt primer of Claims 5 or 6 at the rate of approximately 0.1-0.5 gallons per square yard of surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11905980A | 1980-02-06 | 1980-02-06 | |
| US119,059 | 1980-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1162006A true CA1162006A (en) | 1984-02-14 |
Family
ID=22382361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000369489A Expired CA1162006A (en) | 1980-02-06 | 1981-01-28 | Asphalt primer composition |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1162006A (en) |
-
1981
- 1981-01-28 CA CA000369489A patent/CA1162006A/en not_active Expired
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| MKEX | Expiry |