85results about How to "Improve thermal storage stability" patented technology

The invention relates to high base number (TBN400) vulcanized alkyl phenol calcium and a preparation method thereof. The vulcanized alkyl phenol calcium has a chemical structure as right. The preparation method is as follows: in a system containing solvent and diluent oil, alkyl phenol compound, shielded phenol compound, calcium oxide and / or calcium hydroxide and sulfur are subjected to sulfonation / neutralization reaction at a temperature of between 60 and 180 DEG C to generate phenolate intermediate; balanced calcium oxide and / or calcium hydroxide are added into the mixture, carbon dioxide is introduced, and the mixture is subjected to carbonation reaction; and alkyl polylol is added into the mixture at the sulfonation / neutralization reaction or respectively at the sulfonation / neutralization reaction and the carbonation reaction to participate in the reaction, long-chain carboxylic acid is added into the mixture at the sulfonation / neutralization reaction or respectively at the sulfonation / neutralization reaction and the carbonation reaction to participate in the reaction, and products are obtained through refining. The vulcanized alkyl phenol calcium has the characteristics of high base number, low viscosity, low precipitation number, good heat storage stability, and the like, and has excellent combination property, does not cause environmental protection problem during use, and belongs to an environment-friendly product, and adopts a one-stage process, has mild reaction conditions, and is easy to filter.

The invention discloses a hyperbranched polyester resin pigment dispersant as well as a preparation method thereof, color paste and application of color paste. The hyperbranched polyester resin pigment dispersant is a dendritic hyperbranched polyester with a hydroxyl functional group and a 3D structure, wherein number-average molecular weight of the polyester is 1500-20000, and solid content of the polyester is 20%-90%; the hyperbranched polyester resin pigment dispersant is prepared by reacting acid anhydride with hyperbranched polyester, and then reacting with a compound with a monoepoxy functional group at one end and a hydrophobic long-carbon chain at the other end. The long-chain alkyl / acryl introduced by the dispersant is just as a structure of a fish hook, has good compatibility with a paint main body resin molecular chain, and can lower re-flocculation or aggregation possibility of a dispersion system. Paint or color paste adopting the dispersant disclosed by the invention can reach fineness requirements by grinding within short time; the paint or the color paste is applied to finished product paint, so that the finished product paint has high hardness, and good thermal storage and room-temperature storage stability, and finished product paint precipitation and flooding can be effectively relieved.

The invention belongs to manufacture process for SBS modificatioin asphalt. The feature is that: making SBS mucilage mother liquor and the raw materials are 10-20% sol solvent, 4-6% styrene-butadiene-styrene thermoplastic elastomer; adding the SBS mucilage mother liquor into ground substance asphalt that the temperature is 200-300 degree centigrade, fully whisking and making the SBS mucilage mother liquor to react with ground substance asphalt to finish the manufacture for storage modification asphalt. The effect is that: the compatibility of SBS and the asphalt would be improved; the harm to human health and environment would be conquered; and it could be directly used as the effective constituent of modification asphalt.

The invention discloses modified asphalt for pouring asphalt concrete and a preparation method thereof. The modified asphalt is prepared from substrate asphalt, a modifier viscosity promoter, furfuralextraction oil and a stabilizer. The pouring asphalt concrete provided by the application has the advantages of higher softening point, higher hardness, high elastic recovery and thermal aging performance and very high thermal storage stability. By adopting the high-performance high-viscosity asphalt provided by the invention, the high-temperature performance of the pouring modified asphalt concrete can be enhanced, the pouring modified asphalt concrete has high strength and stiffness moduli in a high-temperature state, the rut resistance is enhanced, the stress state of the whole pavement structure is improved, and the service life of a pouring asphalt concrete pavement is prolonged.

The invention discloses low-temperature ductility and high-temperature-resistant storage stability auxiliaries for modified asphalt as well as a preparation method for the low-temperature ductility and high-temperature-resistant storage stability auxiliaries and modified asphalt. The preparation method comprises the following steps: performing complete desulfurization on regenerated waste rubber to prepare fluid regenerated rubber with main components of linear macromolecular polymer and aryl small molecules under the high-temperature strong-shearing effects of a twin-screw extruder; then, dissolving the fluid regenerated rubber with a diluent in certain proportion to prepare auxiliaries capable of remarkably improving low-temperature ductility and high-temperature-resistant storage stability of the modified asphalt. The low-temperature performances of the modified asphalt prepared by the auxiliaries can reach index requirements of JTG F40-2004 polymer modified asphalt I-B, the high temperature storage stability is obviously improved and no segregation is almost realized. The auxiliaries prepared by the preparation method can be stored for a long time, transported at a long distance, solve the application problem of sticky regenerated rubber, and can be widely applied to various-grade highway engineering.

The invention relates to a road asphalt modifier containing double-ended hydroxyl styrene-butadiene rubber and a preparation and usage method and belonging to the technical field of asphalt modifiers. The main modifier containing active-terminated hydroxyl butylbenzene liquid rubber serving as road asphalt is synthesized, can effectively form a crosslinked network structure with base asphalt to form a novel rubber structure system, so that the properties of the asphalt are improved compressively. Under the synergistic effect of other components, the road asphalt modifier containing the double-ended hydroxyl styrene-butadiene rubber is excellent in property, can remarkably improve the properties of the base road asphalt and has very good stability. The road asphalt modifier is low in adding amount, economic and environmentally friendly, and the adding amount of 3-5% by weight can meet the improvement requirements. The preparation method is simple, convenient, easy to operate and suitable for large-scale production and application, and the yield is above 95%.

The invention provides waterborne multicolor coating with freeze-thaw resistance, basic paint for the waterborne multicolor coating and a method for preparing the basic paint. The basic paint for thewaterborne multicolor coating with the freeze-thaw resistance comprises, by weight, 10-12 parts of hydroxyethyl cellulose aqueous solution, 4-8 parts of dispersing agents, 2-6 parts of defoaming agents, 5-6 parts of coalescing agents, 10-12 parts of antifreezing agents, 0.1-3 parts of pH (potential of hydrogen) regulators, 8-12 parts of titanium dioxide, 80-90 parts of kaolin, 300-350 parts of pure acrylic emulsion, 1-5 parts of sterilizing preservatives, 2-5 parts of thickeners, 0-2 parts of leveling agents and 530-550 parts of deionized water. The waterborne multicolor coating, the basic paint and the method have the advantages that appropriate auxiliaries and emulsion are screened to prepare the basic paint, accordingly, the freeze-thaw stability of products can be guaranteed, and undesirable phenomena such as increase of broken points of multicolor particles, soft color points, frozen color points, post-thickening and the like can be prevented.

The invention discloses a preparation method and product of modified asphalt. The preparation method includes: by the total weight of matrix asphalt being 100 parts, evenly mixing 2-8 parts of styrene-butadiene-styrene segmented copolymer and 0-9 parts of compatibilizer with the matrix asphalt, and stirring for development for 0-8 hours to obtain primary modified asphalt material; spreading the primary modified asphalt material; irradiating the primary modified asphalt material with an electron beam with the dose rate being 30-800kGy to obtain the modified asphalt. The preparation method has the advantages that the asphalt is modified through electron beam irradiation instead of adding stabilizer, adverse effects on the other properties of the product are avoided, the problem that the stabilizer in the prior art easily pollutes environments is solved, and the prepared asphalt satisfy the requirements of I-D types polymer modified asphalt in JTG F40-2004 road asphalt pavement construction technical specifications.

The invention relates to a chemical reaction type SBS modified asphalt thermal storage stabilizer and a preparation method thereof. The preparation method comprises the following steps: adding dimethyl tertiary amine containing one long-chain alkyl, a catalyst and epoxy chloropropane into a reaction container; adding an alcohol solvent; stirring and reacting to obtain a quaternary ammonium salt midbody solution; adding polyethylene polyamine into the quaternary ammonium salt midbody solution, stirring and reacting to obtain a polyethylene polyamine midbody; and adding chloroalkene, aryl chloride and fatty alcohol chloride into the polyethylene polyamine midbody solution, stirring and reacting to obtain the chemical reaction type SBS modified asphalt thermal storage stabilizer. The chemical reaction type SBS modified asphalt thermal storage stabilizer disclosed by the invention is good in adaptability to matrix asphalts different in producing area and model number, is lasting in thermal storage stability and capable of remarkably improving the ageing resistance and high and low-temperature road surface usability of SBS modified asphalt and improving the usability of an SBS modified asphalt road surface.

The invention relates to the field of asphalt binders, and particularly discloses a modified asphalt binder and a preparation method and application thereof. The modified asphalt binder is composed of the following components in parts by weight: 100-200 parts of matrix asphalt; 15-30 parts of waste rubber powder; 5-10 parts of SBS; 3-5 parts of montmorillonite modified sulfur; 4-6 parts of an antioxidant; 2-4 parts of an activator. The preparation method of the montmorillonite modified sulfur comprises the following steps: stirring and mixing montmorillonite and water to obtain a suspension A; adding a coupling agent into the suspension A, and grinding to obtain a suspension B; and adding sulfur into the suspension B, uniformly stirring, drying, crushing and sieving to obtain the montmorillonite modified sulfur. The modified asphalt binder disclosed by the invention has relatively good heat storage stability.