Abstract:
Photoresponsive polymers that comprise a unit derived from an amide functional diol compound that includes a coumarin group are provided. Advantageously, the photoresponsive groups of the photoresponsive polymers may be used to control the viscosity of the photoresponsive polymer. The photoresponsize polymers may also include units derived from amide functional diol compounds with include a fatty acid chain or a polyethylene glycol chain. The photoresponsive polymers may be used for 3d printing. When an adhesive group is added to a photoresponsive polymer they may be used as an adhesive. Adhesive groups include catechol groups.
Abstract:
A polyurethaneurea system that includes in some embodiments Parts A and B reaction components for a polyurethaneurea, wherein an exemplary embodiment provides a Part A that comprises between 55 and 75 wt.% of an oligomeric polyol, between 3 and 7 wt.% of an aromatic diamine chain extender, and between 0.1 and 1.5 % of a reactivity catalyst; Part B includes between 1 and 15 wt.% of a short aromatic diisocyanate and between 5 and 35 wt.% of an aromatic diisocyanate prepolymer that is the reaction product of a short aromatic diisocyanate and a diol. The polyurethaneurea system may further comprise an elastomer-surface activator comprising a second short aromatic diisocyanate and a second aromatic diisocyanate prepolymer, wherein at least one of the second diisocyanates may be the same as at least one of the diisocyanates of Part B.
Abstract:
Die vorliegende Erfindung betrifft neuartige, schnell härtende Klebstoffe auf Basis hydrophiler Polyisocyanat-Prepolymere für den Einsatz in der Chirurgie.
Abstract:
Disclosed is an adhesive containing a polyurethane and 0.0001 to 0.1 mole of carbodiimide groups per 100 g of polyurethane. Said adhesive is characterized in that the polyurethane has a concentration of 0.0001 to 0.1 mole of hydroxysilane or alkoxysilane groups (silane groups) per 100 g of polyurethane.
Abstract:
Klebstoff, enthaltend ein Polyurethan und 0,0001 bis 0,1 mol Carbodiimidgruppen auf 100 g Polyurethan, dadurch gekennzeichnet, dass das Polyurethan einen Gehalt an 0,0001 bis 0,1 mol Hydroxy- oder Alkoxysilangruppen (kurz Silangruppen genannt) auf 100g Polyurethan aufweist.
Abstract:
A moisture-activated adhesive composition comprising the reaction product of (A) a polyisocyanate selected from (a) a blend of polymeric MDI and pure MDI and/or from (b) an isocyanate-terminated prepolymer; (B) an isocyanate-reactive component comprising at least one aliphatic tertiary amine group-containing polyol made by alkoxylation of amines or aminoalcohols; characterized in that said moisture-activated adhesive does not contain any filler.
Abstract:
Die vorliegende Erfindung betrifft ein Bindemittel-System, das als Harzkomponente ein Isocyanatterminiertes Polyurethan-Präpolymer und als Härterkomponente eine Polyolmischung enthält, die mindestens ein alkoxyliertes Diamin enthält, sowie die Verwendung des Bindemittel-Systems als Kleb-/Dichtstoff, insbesondere als Laminierklebstoff für Lebensmittelverpackungen.
Abstract:
Die vorliegende Erfindung betrifft einen zweikomponentigen Polyurethanklebstoff mit hoher Festigkeit und Dehnbarkeit bei einer nur schwach ausgeprägten Abhängigkeit der mechanischen Eigenschaften von der Temperatur, geeignet als struktureller Klebstoff. Der Klebstoff enthält ein Triol, ein Diol, ein Polyamin, ein Polyisocyanat und ein Isocyanatgruppen aufweisendes Polyurethanpolymer in bestimmten Verhältnissen.
Abstract:
A composition comprising: a) one or more isocyanate functional prepolymers; b) one or more catalysts for the reaction of isocyanate moieties with hydroxyl groups; c) one or more reinforcing fillers; and d) a stabilizing amount of one or more compounds comprising a dihydrocarbyl hydroxyl amine, an alicyclic hydroxyl amine, a nitrile oxide of a dihydrocarbyl hydroxyl amine or a nitrile oxide of an alicyclic hydroxyl amine. In another embodiment the invention is a method of bonding two or more substrates together which comprises contacting the two or more substrates together with a composition according to this invention disposed along at least a portion of the area wherein the substrates are in contact. The compositions of the invention are useful as an adhesive to bond substrates together.