摘要:
Disclosed are silane-modified urea derivatives which can be produced by reacting diisocyanates with aminosilanes, hydroxylsilanes, or mercaptosilanes. The inventive silane-modified urea derivatives are suitable especially for use as auxiliary rheological agents, preferably as thixotropic agents for silane-crosslinking systems, particularly for single-component and two-component adhesives and sealants, paints, lacquers, and coatings while causing substantially no increase in viscosity, not being subject to discoloring, being reactive, and positively influencing mechanics.
摘要:
The invention relates to moisture-curing compositions which comprise at least one silane-functional polymer P with at least two terminal groups of formula (I), at least one aminosilane AS and at least one (meth)acrylsilane or anhydridosilane of formula (II). The compositions have improved adhesive properties and are especially suitable fur use as adhesives, sealing materials or coatings, especially as elastic adhesive or sealing materials.
摘要:
The invention relates to a two-component curable polymer system comprising a first component including a water-curable silane-modified polymer and a second component comprising water as a curing agent wherein said second component is in the form of a paste or gel.
摘要:
The invention relates to a method for bonding surfaces. According to said method, a foamable mixture (M), which contains (A) prepolymers (A) with groups of the general formula (1) -A-(CH2)x-SiR1a (OR2)3-a, wherein A represents a bivalent bond selected from -O-, -S-, -(R3)N-, -NH-CO-O-, O-CO-NH, -NH-CO-N(R3)-, N(R3)-CO-NH, or a nitrogen atom which is part of a heterocycle, and R1, R2 and R3, x and a are defined as in claim 1, and (B) propellants (B), is foamed, thereby giving a foam (MS), onto the surfaces to be bonded or between the surfaces to be bonded, or the foam (MS) that can be produced from the mixture (M) is applied after foaming to one of the surfaces to be bonded or between the surfaces to be bonded and the foam (MS) is then squashed between the surfaces to be bonded. The invention also relates to a foamable mixture (M) which contains the above prepolymers (A) with groups of general formula (1) and less than 15% by weight of propellants (B), based on the entire mixture (M).
摘要:
A moisture-curable, graft-modified resin composition includes at least one thermoplastic polymer (i) and at least one silyl group containing polymer (ii) possessing at least one hydrolyzable silyl group that is bonded to the polymer through a linking group containing at least one heteroatom selected from the group consisting of oxygen and nitrogen, each of polymers (i) and (ii) having grafted thereto at least one same or different silane (iii) which, prior to being grafted, possesses at least one reactive carbon-carbon unsaturated bond.
摘要:
An isocyanate trimer having the silane structure or modified by the functional polysiloxane represented by the following formula
and their preparation methods, in which R is the group such as tolyl, ethylphenyl, 1,5-naphthyl, diphenylmethyl, hexamethyl, isophorone, 2,2,6-tirmethylcyclohexyl, 4,4'-biscyclohexylmethane which substituted by di-isocyanate; R 1 is the saturated or unsaturated, linear or branched alkyl, cyclic group, aryl etc., its main carbon atom is 1-8, and may be the homologue of aromatic hydrocarbon, R 2 and R 3 each is C 1 ∼ C 6 alkyl, aryl, trialkylsilanyl, methoxylalkoxyl, a is a positive integer from 0 to 3, R 1 ,R 2 ,R 3 ,R 4 or R 5 each is saturated or unsaturated, linear or branched alkyl, cycloalkyl, aryl, alkoxyl, cycloalkoxyl etc., which the amount of carbon atoms is 1 ∼ 12, X mainly represents -NH-, -NHCH 2 CH 2 NH-, -NHCH 2 CH 2 NHCH 2 CH 2 NH-, -N-, -NHCONH-, , -S-, -O-, n is a positive integer which ≥0.
摘要:
Compositions, such as aerospace sealant, coating, and/or potting compositions are disclosed. The compositions include a polythioether and, in at least some cases, can be sprayable and fuel resistant even when substantially free of volatile organic compounds.
摘要:
Gegenstand der Erfindung sind Hybrid-funktionelle Polymere, Verfahren zu ihrer Herstellung und ihre Verwendung. Die Erfindung betrifft auch Zusammensetzungen, die die Polymere enthalten, sowie Verbundkörper, die mit Hilfe der Zusammensetzung hergestellt werden.
摘要翻译:混合功能聚合物(Q)是新的。 式(R-(Z 0> -O-CH 2 -C(Y 1))(L 1 - (Z 1))k)-OC(= O)-NH-Y的杂化官能聚合物(Q) (NCO)v)n)(I)或(R-(Z 0)-O-CH 2 -C(Y 1))(L 1 - (Z 1))k)-OC(= O )-NH-Y 0 - (NH-C(= O)-X 0))v)n)(II)是新的。 R:n价聚合物残基; Z 0> -CO-,-X-CO-R 2> -CO-或-X-CO- [X 1] mA-; X:O,NR 4>或S; R 4> H或1-10C-烷基; X 1> NR 4>,CH 2或C 2 H 4; m:0或1; R 2>二羧酸,除去两个羧基,优选任选饱和的任选取代的1-6C-亚烷基或任选取代的亚苯基; A:任选取代的亚芳基; Y 0>(v + 1)价多异氰酸酯残基,除去异氰酸酯基后, Y 1> H或CH 3; Z 1>与NCO不同且不与异氰酸酯基反应的官能团; L 1>(k + 1)价官能团(Z 1>)与(I)残基连接的有机残基; X 0>不同于Z 1>的阻塞组,其在大于100℃的温度下除去,或-X1a-L1→(Z2>)k1; Z 2>与Z 1>和NCO不同的官能团,与异氰酸酯基无反应性或比HX1a反应性低的官能团; L 2>(k 1 + 1)价有机残基,官能团(Z 2>)与(II)的残基连接; X1a:O,NH,NR3>或S; R 3>任选饱和的烷基,任选取代的芳基或烷芳基,或-L 2 - (Z 2)k1; k,k1,v:1-3; 和n:2-4。 包括:(1)准备(Q); (2)包含(I)的组合物; (3)制备涂料,粘合剂或密封剂的方法,其包括将(I)与至少另外的组分混合并交联获得的产物; 和(4)通过组合物粘合至少两个基板而获得的复合体。
摘要:
A sizing composition that permits in-line chopping and drying of reinforcement fibers for reinforcing thermoset resins is provided. The size composition includes at least one coupling agent and one or more blocked polyurethane film forming agents. The blocking agent preferably de-blocks at a temperature that permits simultaneous or nearly simultaneous de-blocking and curing of the polyurethane film former. The sized fiber strands (12) may be chopped to form chopped strand segments and dried in a fluidized bed oven, such as a Cratec® drying oven (46), in-line. The chopped fiber strands may then be used in a bulk molding compound and molded into a reinforced composite article. Chopping the glass fibers in-line lowers the manufacturing costs for products produced from the sized fiber bundles (10). Further, because the reinforcement fibers can be chopped and dried at a much faster rate with the inventive size composition compared to conventional off-line chopping processes, productivity is increased.
摘要:
Die vorliegende Erfindung betrifft eine Zusammensetzung umfassend mindestens ein silanfunktionelles Polymer P und einen Weichmacher W der Formel (I), welcher formal ein Diester eines Diols und zweier Carbonsäuren darstellt. Derartige Zusammensetzungen eignen sich als Klebstoffe, Dichtstoffe oder zur Herstellung von Beschichtungen. Dabei weisen sie vor der Aushärtung eine gute Lagerstabilität und im ausgehärteten Zustand einen geringeren Volumenschwund auf.