摘要:
The present invention provides polyurethane systems which cure by radiation and thermal action with crosslinking, and use thereof for the production of holographic media. The polyurethane compositions of the invention comprise A) polyisocyanates, B) isocyanate-reactive block copolymers, C) compounds having groups which react on exposure to actinic radiation with ethylenically unsaturated compounds with polymerization, D) optionally free radical stabilizers and E) photoinitiators.
摘要:
A hybrid resin composition is described, with the composition comprising: A. an A part composition comprising an aliphatic polyfunctional isocyanate compound and a free radical polymerization initiator; and B. a B part composition comprising an ethylenically unsaturated, substantially water-free polyester polyol and a polyurethane catalyst. The A part composition can contain a non-interfering solvent, e.g., styrene, and the B part composition typically has an acid value of 5 or less (based on solids). For outdoor use, the B part composition is preferably free of tertiary hydrogens, ether glycols and terephthalic acid residues.
摘要:
The invention relates to so-called low-density polyurethane foam materials, preferably low-density polyurethane soft-integral foam materials, i.e. polyurethane foam materials having a density ranging from 120 grams per liter (indicated as g/L hereafter) to less than 300 g/L, which can be obtained by reacting polyisocyanates (a) with a polyol component (b) containing the constituents polyesterol (b-1) and polymer polyesterol (b-2), whereby the proportion of polymer polyesterols (b-2) is greater than 5 % by weight but less than 50 % by weight with regard to the total weight of component (b), and optionally chain-lengthening agents (c), in the presence of water (d) serving as an expanding agent. The invention also relates to the use of these low-density polyurethane foam materials in shoe soles.
摘要:
Die vorliegende Erfindung betrifft Polymerdispersionen in Polyesterpolyolen, ein Verfahren zu ihrer Herstellung und deren Verwendung zur Herstellung von Polyurethanen, insbesondere mikrozellulären Polyurethanen.
摘要:
A waterborne film-forming composition is provided that includes a stable aqueous dispersion of a mixture of a polyester polyol and a carboxylic acid-containing acrylic polymer polyol having a weight ratio of polyester polyol to acrylic polymer polyol in the range of 10:90 to 30:70; and a polyisocyanate crosslinking agent where the equivalent ratio of hydroxyl groups to isocyanate groups is from 0.8:1 to 1.7:1. The polyol component is prepared by polymerizing a mixture of ethylenically unsaturated polymerizable monomers that includes at least one carboxylic acid group-containing monomer; at least one primary alcohol group-containing monomer; and at least one glycidyl ester of an aliphatic saturated monocarboxylic acid in the presence of at least one polyester polyol. Multi-layer composite coatings and coated substrates are also provided.
摘要:
Lactidellactone copolymers having a particular sequence distribution of monomer units and a method for preparing these copolymers by adding residual lactide or lactide and lactone after 2-85% of the lactide monomer has been consumed are claimed.
摘要:
Described is a method of applying several coats to an electrically conducting substrate by applying an undercoat using electrophoresis, stoving the undercoat, applying direclty to the stoved undercoat a coloured and/or special-effect overcoat made of an aqueous coating material containing colour and/or special-effect pigments and including as binder: A) 50 to 85 % by wt. of hybrid binders made from polyesters and (meth)acryl copolymers having a hydroxy value of 100 to 350 mg KOH/g and an acid value of 20 to 60 mg KOH/g, B) 0 to 20 % by wt. of binders different from A, C) 15 to 50 % by wt. of free or blocked polyisocyanates and/or compounds based on triazine which crosslink with the hydroxy groups of component A to form ether and/or ester groups, at least 50 % by wt. of the (meth)acryl copolymers in component A being produced in the presence of at least 20 % by wt. of the polyester(s) in component A. The overcoat is followed by a transparent top coat.
摘要:
Die Erfindung betrifft die Verwendung einer wäßrigen Bindemittelkombination zur Herstellung einer physikalisch schnell trocknenden und gleichzeitig steinschlagfesten und bewitterungsstabilen Beschichtung, vorzugsweise in der Automobilserienlackierung.