Die Erfindung betrifft Aldiminoalkylsilane ALS, die herstellbar sind aus der Reaktion von mindestens einem Aminoalkylsilan AS der Formel (I) und mindestens einem Aldehyd ALD der Formel (II), sowie Verfahren zu deren Herstellung. Weiterhin offenbart sind die Verwendung dieser Aldiminoalkylsilane in gegenüber Aminen reaktive Verbindungen enthaltenden Zusammensetzungen, insbesondere Polyurethanzusammensetzungen, sowie in Haftvermittlerzusammensetzungen. Die Aldiminoalkylsilane ALS und die diese enthaltenden Zusammensetzungen haben den grossen Vorteil, dass sie geruchsarm oder geruchsfrei sowie lagerstabil sind.
Curable silane-encapped compositions having improved performances
申请人:Witco Corporation
公开号:US06001946A1
公开(公告)日:1999-12-14
Certain members of the class of N-silylalkyl-aspartic acid esters, when used to endcap polyurethane polymers, offer moisture curable, one-part sealant formulations having significantly improved physical property improvements over other members of the same class of organofunctional silanes. More specifically, polyurethane polymers terminated with either the dibutyl or diethyl maleate/primary aminoalkyl silane addition product offer sealants which substantially outperform comparative sealants obtained using polymers endcapped with other olefinic carboxylate ester (dimethyl maleate, dimethyl crotonate) or nitrile (acrylonitrile)/primary aminoalkyl silane addition products. Additionally, sealant formulations incorporating the dibutyl or diethyl maleate/primary aminoalkyl silane terminated polymers demonstrate unexpected improvements in both elongation and tensile strength performance. The dibutyl maleate and dimethyl maleate based polymers give significant increase in tear resistance.
Moisture curable polymers having terminal or pendant silyl groups of the formula:
where R1 represents an alkyl group having 1 to 10 carbon atoms, optionally interupted with one or more ether oxygen atoms, or a group of the formula
R2 represents a C1 to C6 alkoxy group or a C6-C8 aryloxy group;
R3 represents an alkyl or an aryl group;
T represents a branched or cyclic alkylene radical of 4 to 10 carbons, which may be optionally interrupted by one or more ether oxygen atoms;
X is an alkylene group of 3-10 carbon atoms, which may be linear, branched or cyclic;
and a is 0, 1 or 2, may be prepared by reacting (A) a compound having at least two isocyanate groups thereon with (B) a silane of formula (3):
Moisture cured sealant formulations formulated with the polymers exhibit improved thermal stability, elongation, and tear resistance.
[EN] INORGANIC DENTAL FILLERS INCLUDING A SILANE TREATED SURFACE<br/>[FR] CHARGES DENTAIRES INORGANIQUES COMPRENANT UNE SURFACE TRAITÉE AU SILANE
申请人:3M INNOVATIVE PROPERTIES CO
公开号:WO2019123263A3
公开(公告)日:2019-11-07
Cyclic silylureas and process of preparation
申请人:OSi Specialties, Inc.
公开号:US05354880A1
公开(公告)日:1994-10-11
This invention provides a class of cyclic silylureas and a process of preparing them, which process comprises reacting a cyclosilazane with an isocyanate containing moiety; a class of cyclosilazanes and process for making them, which process comprises heating an aminoalkylalkoxysilane in the presence of a basic catalyst at a temperature less than 100.degree. C. at subatmospheric pressure; and aminoalkylalkoxysilanes and a process for making them, which process comprises reacting a nitrile and a vinylsilane while heating in the presence of a base selected from the group consisting (a) an alkali metal, (b) alkali metal alkoxide, (c) an alkali metal amide, (d) an alkali metal hydride and (e) mixtures thereof to form a reaction product which is subsequently hydrogenated.