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7608650 |
Bitumen/rubber compositions crosslinked with polythiomorpholines, polysulfides and/or mercaptobenzimidazole
Asphalt and elastomeric polymer compositions crosslinked with mixed polythiomorpholines or at least one alkyl polysulfide can give polymer modified asphalts (PMAs) with improved properties and/or...
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7569627 |
Hot melt binder for asphalt product with reduced production temperature and applications of said binder
The binder is produced based on natural bitumen, or bitumen from the oil industry, and comprises a first additive which is constituted by a hydrocarbon wax whose melting point is greater than 85°...
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7544239 |
Reduction of sulfur emissions from crude fractions
Methods of modifying crude fractions are described herein. The methods generally include blending a crude fraction with an emissions reducing additive to form a modified crude fraction, wherein the...
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7536221 |
Coatings comprising self-assembled molecular structures
A coating for an implantable medical device is disclosed, the coating including a self-assembled molecular structure. The coating can be used for altering the release rate of a therapeutic...
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7452930 |
Curable composition
It is the subject of the present invention to provide a solvent-free ambient-temperature curable composition, excellent in water-resistant adhesion, storage stability and curability, and generates...
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7402619 |
Cross-linking compositions for polymer-modified asphalt compositions
The present invention relates to a bituminous composition comprising a bituminous component, an elastomeric polymer component, and a specific cross-linking composition component comprising...
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7365111 |
Use of zinc oxide to improve compatibility of polymer modified asphalt crosslinked with phenol aldehyde resin
In methods of preparing asphalt and elastomeric polymer compositions crosslinked with phenol aldehyde resins and sulfur, such as polymer modified asphalt (PMA), it has been discovered that the MP1...
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7247664 |
Bituminous composition with improved ‘walk-on-ability’ and its use in roofing applications
Disclosed is a bituminous composition that comprises a bituminous component (A), an elastomer component (B), preferably a block copolymer of a conjugated diene and a monovinylaromatic hydrocarbon,...
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7241821 |
Polymer-modified, vulcanized asphalt composition and its method of preparation
A method is provided for improving high temperature performance grade properties of polymer-modified, vulcanized asphalt by treating an asphalt cement under mild oxidizing conditions sufficient to...
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7241818 |
Filler comprising fly ash for use in composites
The present invention is a fly ash filler or filler blend having a particle size distribution with at least three modes that can be combined with a polymer or bitumen at higher filler loadings to...
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7205344 |
Crosslinker for modified asphalt
The present invention relates to compositions and methods for providing an improved means of modifying asphalt with a polymer. More particularly, this invention provides a crosslinking system to...
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7186765 |
Method for preparation of stable bitumen polymer compositions
The present invention provides a method for preparing an asphalt and thermoplastic elastomer composition. The process comprises heating an asphalt cut in a stirred tank to a temperature sufficient...
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7160943 |
Aqueous crumb rubber composition
A fluid or semifluid additive composition useful for asphalt paving comprises between about 10% and about 50% crumb rubber, about 10% and about 50% petroleum hydrocarbon having at least about 50%...
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7060743 |
Bitumen composition
The present invention provides a bitumen composition including: —(i) from 0.1 to 25% wt of an elastomer, (ii) from 0.1 to 40% wt of a solvent, (iii) from 30 to 99% wt of a bitumen, (iv) from 0.1...
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7045570 |
Liquid asphalt modifier
The present invention relates to compositions and methods for providing an improved means of modifying asphalt with a polymer. More particularly, this invention provides a solvent system that...
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6956071 |
Use of alternate thiol accelerators for crosslinking rubber in asphalt
It has been discovered that certain nitrogen-containing thiols other than mercaptobenzothiazole (MBT) perform equivalently as accelerators in preparing asphalt polymer compositions. Typically, the...
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6927245 |
Dispersing agent and method for the delivery of cross-linking agent to polymer modified asphalt compositions
The present invention provides a dispersing agent that facilitates the delivery of a cross-linking agent to polymer modified asphalt. The present invention further includes a composition comprising...
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6872763 |
Bitumen vulcanizing composition
Provided is a vulcanizing agent for vulcanizing bitumen, which vulcanizing agent comprises a sulphur agent and a binder, wherein the vulcanizing agent is in the form of pellets. Further provided is...
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6818687 |
Modified asphalt with carrier and activator material
A polymer modified asphalt is characterized by the addition of a carrier material such as mineral oil. The carrier material is mixed with an activator material and then added to a hot mixture of...
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6759453 |
Asphalt compositions
The invention comprises polymers which have been functionalized so as to be able to chemically react with polyamines to form adducts containing at least one or more groups consisting of amino,...
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6727299 |
Aromatic polysulfide and an asphalt composition containing the same
The present invention relates to a novel aromatic polysulfide and an asphalt composition containing the same, and more particularly, to a novel aromatic polysufide having repeating units of the...
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6713540 |
Method for crosslinking asphalt compositions and the product resulting therefrom
A process is provided for crosslinking polymer modified asphalt compositions using a combination of a crosslink initiator, crosslink co-agent and crosslinkable polymer, to provide a process that is...
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6713539 |
Storage-stable modified asphalt composition and its preparation process
A storage-stable modified asphalt composition, which comprises: 50-97.7 parts by weight of a base asphalt, 2.0-20.0 parts by weight of a polymer having double bonds, 0.1-20.0 parts by weight of a...
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6583202 |
Roofing membrane
This invention relates to a roofing or siding membrane comprising a non-woven mat coated with an asphaltic composition containing, in addition to 35-75 wt. % bitumen, a mixture of isotactic and...
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6569351 |
Accelerator-gel additive for use in the production of polymer-modified asphalt
The present invention is directed to a an accelerator-gel additive used to deliver an accelerator such as sulfur, into a system for the production of polymer modified asphalt, vulcanized rubber or...
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6538060 |
Bituminous polyurethane interpenetrating elastomeric network compositions as coatings and sealants for roofing and other applications
Elastomeric polyurethane interpenetrating network compositions are disclosed which are preferably developed by in situ reaction of polyols with different isocyanates and polyisocyanates in a...
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6429241 |
Elastomer-modified bituminous compositions
Polymer modified bituminous compositions which are stable against phase separation are provided at greater levels of incorporation of elastomeric polymer having a conjugated diene structure, such...
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6414056 |
Asphalt compositions and method for making (LAW617)
The present invention relates to novel polymer modified asphalt polyphosphoric and superphosphoric acid treated binder compositions having enhanced high service temperature performance properties...
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6407152 |
Method for preparing asphalt and polymer compositions incorporating multi-component crosslinking agents
A process for the preparation of an asphalt and polymer composition in which a minor amount of polymer component is subjected to a crosslinking. An asphalt base material is heated in a mixing...
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6380284 |
Method for continuous production of modified bituminous materials
The invention concerns the continuous production of asphalts modified by the addition of polymers and reacted with sulfur. The binders produced by said methods can contain very high amounts of...
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6359033 |
Stable paving compositions having improved low and high temperature properties
A paving composition comprises a mixture of about 90 to 99.5 wt. % of an asphaltic material and about 0.5 to 10 wt. % of solid particles each encapsulated with a cross-linked polymer, the...
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6310122 |
Stable bitumen polymer compositions
The present invention provides a method for preparing an asphalt and thermoplastic elastomer composition. The process comprises heating an asphalt cut in a stirred tank to a temperature sufficient...
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6284820 |
Bituminous compositions modified with polyolefinic materials
The present invention relates to bituminous compositions, particularly suitable for paving and building waterproofing, comprising a bitumen and a copolymer of ethylene with propylene and/or other...
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6218449 |
Process for the preparation of functionalized elastomer/bitumen compositions and their use in coatings
The invention provides a method comprising contacting, between 100° C. and 230° C. and under agitation, an elastomer, a functionalising agent and optionally, a peroxide compound. The...
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6191217 |
Gels derived from polypropylene grafted alkyl vinylether-maleimide copolymers
The present invention teaches a method for enabling the formation of a high damping, soft polymer gel. The method includes: reacting a poly(alkyl vinylether-co-maleimide) polymer with a maleated...
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6180697 |
Method for preparation of stable bitumen polymer compositions
The present invention provides a method for preparing an asphalt and thermoplastic elastomer composition. The process comprises heating an asphalt cut in a stirred tank to a temperature sufficient...
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6156827 |
Bituminous compositions prepared from thermoplastic polyolefins and their uses
Bituminous compositions of the bitumen-polymer type, in homogenous phase, contain at least one bitumen base and are prepared from at least one polymer of the thermoplastic polyolefin type. These...
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6130276 |
Method of reducing fumes from a vessel of molten asphalt
In a method of melting asphalt in a vessel, the molten asphalt normally emitting fumes, 0.2 weight percent to 6 weight percent of a polymer is added to the asphalt to reduce the visual opacity of...
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6107373 |
Consumable asphalt containers and method of reducing fumes from a kettle of molten asphalt
A consumable container is molded from a composition comprising 40 to 90 weight % of an asphalt and 10 to 60 weight % of a polymer material, which advantageously can include a first polymer such as...
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6069194 |
Packaged asphalt containing fume-reducing additives and method of producing same
A method and apparatus for packaging a low-fuming meltable asphalt composition which includes the introduction of pellets comprising one or more polymeric materials into molten asphalt flowed into...
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6060542 |
Bitumen compositions and a process for their preparation
The invention provides a process for preparing a bitumen composition comprising blowing a mixture with an oxygen-containing gas which mixture comprises a bitumen having a penetration of less than...
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6057390 |
Crosslinkable polymer-modified asphalt and its method of preparation
A method is provided for improving high temperature performance grade properties of asphalt which comprises i) heating an asphalt cement to 200 to 500° F. (93 to 260° C.), ii) adding 1 to 10 wt....
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6046260 |
Zinc oxide dispersion
A zinc oxide dispersion for use in rubber compounds having at least 40, preferably 74-92, weight percent zinc oxide powder and at least five weight percent of a binder selected from the group...
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6020404 |
Bitumen/polymer compositions with improved stability and their application in carrying out surfacing operations
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6011095 |
Method for preparing bitumen/polymer compositions and use thereof
Bitumen/polymer compositions are produced by contacting, between 100° C. and 230° C., under agitation, one bitumen or a mixture of bitumens with at least one olefinic polymer bearing epoxy or...
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5990206 |
Asphalt modifier composition and asphalt composition
Preparation of an asphalt composition using an asphalt modifier composition comprising at least one member selected from the group consisting of rubber-base modifiers and resin-base modifiers and a...
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5959007 |
Bituminous compositions prepared with process treated vulcanized rubbers
Stable rubberized bitumen concentrates are prepared by initially forming a mass comprising bitumen and crumb rubber particles in an amount of at least about 15 wt % of the mass with the crumb...
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5948827 |
Rubber composition obtained by recycling scrap material
A rubber composition obtained by recycling scrap material and adapted for use as raw material for manufacturing products for building, automobile accessory, and footwear industries possibly as a...
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5840109 |
Mixtures of bitumen and olefin polymers suitable for modifying bitumens
Mixtures containing bitumen and at least one polymer selected from (A) an essentially atactic propylene homopolymer, (B) an amorphous propylene copolymer with a C 4 -C 10 α-olefin, and (C) an...
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5756565 |
Non-gellable bitumen/polymer compositions
Non-gellable, high temperature storage-stable bitumen/polymer compositions are provided and which are produced by stirring a sulphur-cross-linkable elastomer, an antigelling adjuvant and a...
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