2 results about "APAO" patented technology

Compositions comprising: (a) from 0.05% to 50% by weight of at least one amorphous poly-alpha-olefin (APAO) having chains with an average maximum end-to-end distance (Rmax) greater than or equal to 1.6*10-6 m; (b) from 35% to 95% by weight of a liquid phase selected from: vegetable oils, synthetic organic esters, linear or branched saturated hydrocarbons, aromatic hydrocarbons, and mixtures thereof; (c) from 0 to 15% by weight of an anti-sticking agent; the weight percentages being calculated on the basis of the total weight of the composition. The APAOs are obtained by a polymerization process of at least one alpha-olefin monomer, carried out at a temperature not higher than 40°C, by using a catalytic system comprising (i) a bimetallic catalyst containing: titanium in the oxidation state +3 (Ti(III)), and optionally titanium in the oxidation state +4 (Ti(IV)); and at least one metal selected from hafnium in the oxidation state +4 (Hf(IV)) and zirconium in the oxidation state +4 (Zr(IV)); and (ii) at least one organoaluminum co-catalyst. Such compositions have a drag reduction effect higher than that achieved by using amorphous poly-alpha-olefins synthetized by means of conventional Ziegler Natta catalytic systems containing only titanium and aluminum as metals.

The application provides a kind of multi-aldehyde group crosslinking polymer, preparation method and its prepared direct feeding high tackiness pitch material and purposes, belong to pitch modified material field.The preparation method of multi-aldehyde group crosslinking polymer in the application, polyvinyl butyral, isocyanate-containing monomer, catalyst and polar solvent are mixed and then reacted, after the reaction is finished, multi-aldehyde group crosslinking polymer is obtained after treatment.The multi-aldehyde group crosslinking polymer prepared by the method of the application is used in direct feeding high tackiness pitch material, through the stable integration of SBS, APAO and other components by moderate crosslinking effect, form the particle with uniform structure, and the rich aldehyde group and polar segment on polymer chain, as efficient "in-situ compatibilizer", make SBS and other polymer molecular chain can quickly change from the state of curling, gathering to highly swollen, stretched state, thereby greatly reduce its melt viscosity and mixing energy barrier, can be used for direct feeding production high performance high tackiness pitch on site.