摘要:
The present invention relates to associative cellulose ethers with improved thickening effects, especially in paint. The improvement depends on the presence of a hydrophobic modifying group of the general formulawhere R is an aliphatic group of 12-22 carbon atoms and n is a number from 3 to 7. The DS of the hydrophobic group is 0.003 to 0.012.
摘要:
The invention pertains to an aqueous dispersion of particles of a polymer having a functional group for cross-linking, which is obtainable by a free radical emulsion polymerization of at least two different ethylenically unsaturated monomers, a surfactant of the formula M+.-OOC-CH=CHCOOR, wherein R is C(6-22) alkyl and M+ is Na+, K+, Li+, NH4+, or a protonated or quaternary amine, and a co-reactive compound having at least two groups capable of reacting with the functional group for cross-linking, characterized in that the glass-transition temperature (Tg) of the polymer at the center of the particle is different from the Tg of the polymer at the surface of the particle, the difference being at least 55° C., and the Tg of the polymer having the highest Tg is at least 40° C.
摘要:
A process for manufacturing continuous polyester filament yarn for technical applications from a polymer over 90% of the chains of which are composed of ethylene terephthalate units, via a one-step spinning process, with the undrawn filaments having a crystallinity smaller than 16% and the yarn being wound at a rate larger than 6000 m/min. The yarn obtained in this fashion is particularly suitable for use as reinforcing material in rubber articles, notably as reinforcing material in pneumatic tires for cars. The polyester filament yarn can be used to make cords of uncommonly high dimensional stability and a unique combination of breaking tenacity, shrinkage, and breaking toughness.
摘要:
The invention relates to non-slow-binding thrombin inhibitors of the formula: A-B-C-Lys-D wherein A is H, 2-hydroxy-3-cyclohexylpropionyl-, R1, R1-O-CO-, R1-CO-, R1-SO2-, -(CHR2)nCOOR3, or an N-protecting group, wherein R1 is selected from -(1-6C)alkylene-COOH, (1-12C)alkyl, (2-12C)alkenyl, (6-14C)aryl, (7-15C)aralkyl; and (8-16C)aralkenyl, the aryl group of which may be substituted with (1-6C)alkyl, (2-12C)alkoxy, hydroxy, or halogen; R2 is H or has the same meaning as R1, R3 is selected from H, (1-12C)alkyl, (2-12C)alkenyl, (6-14C)aryl, (7-15C)aralkyl and (8-16C)aralkenyl, the aryl group of which may be substituted with (1-6C)alkyl, (2-12C)alkoxy, hydroxy or halogen; n is an integer of 1 to 3; B is a bond, L-Asp or an ester derivative thereof, Leu, norLeu, -N(benzyl)-CH2-CO-, -N(2-indane)-CH2-CO-, D-1-Piq, D-3-Piq, D-Tiq, Atc or a D-amino acid having a hydrophobic aromatic side chain; C is Azt, Pro, Pec, norLeu(cyclo)Gly, an amino acid of one of the formulae -N[(3-8C)cycloalkyl]-CH2-CO- or -N(benzyl)-CH2-CO-, D is selected from COOH, tetrazole, oxazole, thiazole and benzothiazole, or A and C have the aforesaid meanings, B is D-(3-8C)cycloalkylalanine, and D is tetrazole, oxazole, thiazole or benzothiazole; or a prodrug thereof; or a pharmaceutically acceptable salt thereof; with the exception of the compound Me-D-Phe-Pro-Lys-COOH. The compounds can be used as antithrombotic agents.
摘要:
This patent describes an economical and environment-friendly process for the synthesis of anionic clays with carbonate and/or hydroxide anions as the charge-balancing interlayer species. It involves reacting a slurry comprising an aluminium source and a magnesium source, the aluminium source comprising two types of aluminium-containing compounds, preferably aluminium trihydrate and/or thermally treated calcined aluminium trihydrate. There is no necessity to wash or filter the product. It can be spray dried directly to form microspheres or can be extruded to form shaped bodies. The product can be combined with other ingredients in the manufacture of catalysts, absorbents, pharmaceuticals, cosmetics, detergents, and other commodity products.