Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1998-07-23
2000-08-22
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 59, 524 71, 526336, 526339, 526347, C08L 9500
Patent
active
061073741
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns blend compositions comprising asphalt or bitumen modified with interpolymers of olefins and vinylidene aromatic monomers applicable to paving, roofing and other construction materials containing these compositions, a process for preparing said compositions and the composition of the interpolymers used to make the blended compositions. The invention also concerns new substantially random interpolymers resulting from polymerizing at least one olefin, at least one vinylidene aromatic monomer and at least one diene.
The use of petroleum residuum such as asphalt as a paving material and other construction material is well known. It is also well known to blend various polymeric materials into the asphalt to improve certain properties. For example, polyolefins have been used; but, as pointed out in U.S. Pat. No. 4,240,946 the teachings of which are specifically incorporated herein by reference, the addition of such polyolefins increases the viscosity of such blends at working temperatures thus necessitating special mixing and homogenizing procedures. The use of such polyolefins, however, is greatly desired since they help maintain the integrity of the asphalt when subjected to elevated temperatures such as when used as paving, roofing or other construction material. It would be desirable if a material were discovered which when added to bitumen would broaden the applicable temperature range of bitumen, stiffening the bitumen at high temperatures while maintaining low temperature flexibility and usable viscosities. It would also be desirable if this additive would be stable to the high temperatures encountered during the blending with bitumen and long term storage of the blend.
It would be highly desirable if polymers were available which were compatible with a variety of asphalt compositions and it would further be desirable if these polymers were easily mixed into the asphalt with only low shear agitation.
BRIEF SUMMARY OF THE INVENTION
The present invention pertains to a composition comprising (A) from about 85 to about 99 percent by weight of a bituminous material; and (B) from about 1 to about 15 percent by weight of at least one interpolymer containing from about 20 to about 80 weight percent of polymer units derived from at least one vinylidene aromatic monomer and from about 20 to about 80 weight percent of polymer units derived from at least one aliphatic olefin having from 2 to about 10 carbon atoms.
Another aspect of the present invention pertains to a composition comprising (A)from about 90 to about 99 percent by weight of a bituminous material; and (B) from about 1 to about 10 percent by weight of an ethylene/styrene interpolymer containing from about 25 to about 60 percent by weight of polymer units derived from styrene and from about 40 to about 75 percent by weight of polymer units derived from ethylene.
Another aspect of the present invention pertains to an aqueous dispersion or emulsion comprising containing from about 20 to about 80 weight percent of polymer units derived from at least one vinylidene aromatic monomer and from about 20 to about 80 weight percent of polymer units derived from at least one aliphatic olefin having from 2 to about 10 carbon atoms;
The present invention also pertains to a substantially random interpolymer comprising from at least one olefin having from 2 to about 10 carbon atoms; from at least one vinylidene aromatic monomer; and from at least one diene having from 4 to about 10 carbon atoms.
The present invention can comprise, consist of, or consist essentially of, all or only a portion of the components, compounds, substituent groups or reaction steps. Components, compounds, substituent groups or reaction steps can be eliminated singly or in multiples of any two or more.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
Not Applicable.
DETAILED DESCRIPTION OF THE INVENTION
The term "hydrocarbyl" means any aliphatic, cycloaliphtic, aromatic, aryl substituted aliphatic, aryl substituted cycloalip
REFERENCES:
patent: 2935486 (1960-05-01), Sayko et al.
patent: 2996467 (1961-08-01), Hawley et al.
patent: 4145322 (1979-03-01), Maldonado et al.
patent: 4240946 (1980-12-01), Hemersam
patent: 4673711 (1987-06-01), Sharps, Jr. et al.
patent: 4839404 (1989-06-01), Chang et al.
patent: 4933384 (1990-06-01), Wolfe
patent: 4975476 (1990-12-01), Wolfe
patent: 5288762 (1994-02-01), Park et al.
patent: 5302638 (1994-04-01), Ho et al.
patent: 5340840 (1994-08-01), Park et al.
patent: 5346963 (1994-09-01), Hughes et al.
patent: 5460818 (1995-10-01), Park et al.
patent: 5488078 (1996-01-01), Shutt et al.
patent: 5703187 (1997-12-01), Timmers
"First Technical Details on Some Next-Generation Polyolefins", Plastics Technology, Sep. 1992, pp. 25.
Kurt W. Swogger, "Application of Insite* Technology in the Rubber/Elastomer Market", Worldwide Metallocene Conference Metcon '95, May 17-19, 1995, Houston, Texas.
"Dow pairs ethylene, styrene", Plastics News, Jun. 26, 1995, pp. ?.
"Metallocene Catalysts Initiate New Era In Polymer Synthesis", Chemical & Engineering News, Sep. 11, 1995, pp. 15-20.
Gerald Lancaster et al., "Applications of Insite* Technology in the Rubber/Elastomer Market", Proceedings of Fifth International Business Forum on Specialty Polyolefins SPO '95, Sep. 20-22, 1995, pp. 109-123.
"Dow Plots PP Course", Chemical Week, Strategies, Dec. 20/27, 1995, p. 8.
Y.W. Cheung et al. "Structure, Thermal Transitions and Mechanical Properties of Ethylene/Styrene Copolymers", ANTEC '96, pp. 1634.
C.P. Park et al., "Compatibilization of Polyethylene-Polystyrene Blends with Ethylene-Styrene random Copolymers", ANTEC '96, pp. 1887.
"Metallocene Technology Drives New Materials", News Update, Canadian Plastics, Jan. 1996, vol. 54, No. 1, pp. 8.
"Metallocene yield ethylene-styrene interpolymers", NEWSFOCUS, Plastics Technology, Jan. 1996, pp. 13.
"Dow's plan's for '96: Become force in PP", Plastics World, Jan. 1996, pp. 12-13.
Derwent Abstract 95-281168 (JP 07/179847, Dec. 22, 1993).
Derwent Abstract 97/325153/41 (CA 2,097,457)*.
"Material Properties and Applications of Ethylene-Styrene Interpolymers from Metallocene Catalyst", Steve Hoenig et al., Proceedings of Sixth International Business Forum on Specialty Polyolefins SPO'96, pp. 261-268.
International Search Report dated Dec. 16, 1997 issued by the EPO acting as the International Searching Authority in PCT/US97/12567.
Bredeweg Corwin J.
Diehl Charles F.
Gatzke Arnold L.
Gros William A.
McKay Kevin W.
Teskin Fred
The Dow Chemical Company
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