摘要:
The present invention relates to an aqueous polyurethane dispersion obtainable by the reaction of at least: (A) one polyisocyanate with two or more isocyanate groups, (B) one polyester component comprising (B1) a polyesterpolyol with a mean molecular weight of 300 to 900 g/Mol, having structural units derived from terephthalic acid, (C) one ionic group introducing compound with at least one sulphonate and/or carboxylate group and at least one isocyanate reactive group, (D) one diol with a mean molecular weight of 62 to 400 g/Mol, (E) one polyol with a mean molecular weight of 62 to 400 g/Mol, having three or more hydroxyl groups, (F) one amino functional and/or aminohydroxyl functional compound, its use to coat a substrate and a coating obtained by using the dispersion.
摘要:
Embodiments of the invention provide for paper mill equipment that can better withstand the conditions of a paper mill. Embodiments encompass paper mill equipment that incorporate a polyurethane layer having a hysteresis value of less than 70% and a permanent set of less than 30%. The polyurethane layer includes a polyurethane produced by curing a mixed composition. The mixed composition includes at least a urethane prepolymer (A) and at least a curing agent (B) having an active hydrogen group (H). The urethane prepolymer (A) has at least one terminal isocyanate group and is obtained by reacting at least a polyisocyanate compound (a) with at least a polycarbonate diol compound (b) having a number average molecular weight of at least 1500 g/mol. The curing agent (B) includes at least an amine compound. The elastomer compositions are also useful to coat the acid pickling roller in the steel industry.
摘要:
The invention relates to a coating composition comprising: a) at least one alkyd binder with an oil content of at least 45 wt% and at most 85 wt%, a modified alkyd binder, or a combination thereof; b) at least one amine or imine component selected from the group comprising: polyaspartic acids and esters thereof, (meth)acrylate/aspartate amines, aldimines, ketimines, and combinations thereof; and c) at least one isocyanate compound.
摘要:
The invention concerns a threaded tubular component for drilling or working hydrocarbon wells, said tubular component having at one of its ends (1; 2) a threaded zone (3; 4) produced on its outer or inner peripheral surface depending on whether the threaded end is male or female in type, in which at least a portion of the end (1; 2) is coated with at least one film of polyurethane (12), 100% solid state, with an essentially rigid structure, based on a matrix of polyurethane and polyurea, in which the urethane functionality is predominant with respect to the urea functionality in a proportion of at least 55% by weight.
摘要:
Die vorliegende Erfindung betrifft Polyurethangießharzsystem, enthaltend (a) ein Isocyanatprepolymere mit einem NCO-Gehalt von mindestens 7 Gew.-%, erhältlich durch Umsetzung von Isocyanat (a1), enthaltend 2,4' MDI und 4,4'-MDI, und Polyol (a2), und (b) eine Stoffmischung, enthaltend mindestens ein Polyol 2 (b1) und mindestens ein Diamin (b2), wobei das Diamin (b2) einen Schmelzpunkt von mindestens 80 °C aufweist, sowie gegebenenfalls weiteren Polyolen (c) und gegebenenfalls Hilfs- und Zusatzstoffen (d). Weiter betrifft die vorliegende Erfindung ein Verfahren zur Herstellung von Gießelastomeren unter Einsatz des Polyurethangießharzsystems sowie ein Polyurethangießelastomer, erhältlich nach einem solchen Verfahren.
摘要:
The present invention provides a polyurethane which is non-sticky, exhibits superior handling properties and superior moldability, and has superior adhesive properties with silicones even if a surface activation treatment is not carried out beforehand. The polyurethane of the present invention contains polyol units and organic polyisocyanate units. The polyol units contain an alkenyl group-containing organopolysiloxane structure in an amount ranging from 0.01 to 20% by weight with respect to the weight of the aforementioned polyurethane.
摘要:
The invention relates to aldimines of formula (I) which comprise at least one hydroxyl group as well as to curable compositions containing said aldimines. The aldimines are easy to produce and can be used in a wide range of fields. The aldehydes produced during hydrolysis can be incorporated into a polymer by means of the hydroxyl group and comprise tertiary amino groups that can have a catalytic effect.
摘要:
The invention relates to aldimines of formula (I) which comprise at least one hydroxyl group as well as to curable compositions containing said aldimines. The aldimines are easy to produce and can be used in a wide range of fields. The aldehydes produced during hydrolysis can be incorporated into a polymer by means of the hydroxyl group and comprise tertiary amino groups that can have a catalytic effect.
摘要:
Die vorliegende Erfindung betrifft Aldimine der Formel (I), welche mindestens eine Hydroxylgruppe aufweisen, sowie härtbare Zusammensetzungen enthaltend diese Aldimine. Die Aldimine lassen sich auf einfache Art und Weise herstellen und sind breit einsetzbar. Die bei der Hydrolyse entstehenden Aldehyde lassen sich über die Hydroxylgruppen in ein Polymer einbauen und weisen tertiäre Aminogruppen auf, welche katalytisch wirken können.