Abstract:
The present invention relates to a compound having the formula LaM(OR1)bR2cXd wherein M is a metal selected from Ti, Zr and Hf; L is a ligand selected from permethylpentalene, (hydro)permethyl-pentalene, (hydro)pentalene, cyclopentadiene, indene and ethylene- or silane-bridged indene, preferably (bis)indene; R1 is a 1-6C alkyl, substituted or unsubstituted phenyl, or a substituted or unsubstituted phenylalkylene group; R2 is Me or Et; X is halogen; a=1 to 3, b=1 to 3, c=0 or 1 and d=0, 1, 2 or 3; and dimers thereof, the use of the compound as an initiator in the polymerization of lactide monomer and a process for producing a polylactide performed by contacting a lactide monomer with the compound.
Abstract:
A process for fixing an article to a substrate with a mounting set including two receptacles storing an aerobic adhesive and a hydrophilic substance, respectively. The aerobic adhesive and the hydrophilic substance are removed from the two receptacles and then mixed together to prepare the fastening. A layer of the fastening composition is applied to the article. The article is fixed to the substrate by pressing the layer of the fastening composition against the substrate. The aerobic adhesive in the layer hardens because of the moisture contained in the hydrophilic substance.
Abstract:
A two-part moisture-curing composition having as a first part water and an hydroxy-terminated diorganosiloxane; and a second part which includes a reactive silicone, at least one end-capping silane which includes one or more enoxy groups, at least one end-capping catalyst and at least one moisture cure catalyst. Enhanced and controlled cure speed is obtained by these compositions.
Abstract:
A process for the production of compounds which contain at least one urea group and at least one silyl group. The process involves reacting a compound containing at least one amino group and a carbamate compound. The compounds produced by this process are useful as surface coating compositions, foams and adhesives.
Abstract:
Two component adhesive/sealing masses based on silane terminated prepolymers contain a component A which is a one-component, humidity hardening adhesive/sealing mass with high initial adhesiveness, and a component B which is a crosslinking agent and/or accelerator for component A are disclosed. These adhesive/sealing masses are suitable for gluing without primer parts made of metals or other materials such as aluminum, steel, glass, wood or plastics. In a particularly preferred embodiment, component B consists of a viscous, stable mixture of plasticisers, water, thickeners and other optional auxiliary substances.
Abstract:
The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA modified with an alkoxy-functional silicon compound and the second component comprises the same PSA modified with a cure agent for the alkoxy-functional silicon compound. The method provides improved adhesive bond strength over the unmodified PSA which generally increases with time.
Abstract:
A curable composition comprising (A) an organic polymer containing at least one reactive silicon functional group crosslinkable to produce an elastomer by the formation of a siloxane bond in its molecule and (B) an organic silicon compound having a molecular weight of not less than 140 and represented by the formula (1):[(CH.sub.3).sub.3 SiO].sub.n R.sup.1 (1)wherein R.sup.1 is a residue of an alcohol or a weak acid which has a valency of n, and n is a positive integer. The composition of the invention can give cured product having excellent modulus and elongation as well as has excellent storage stability.
Abstract translation:一种可固化组合物,其包含(A)含有至少一个反应性硅官能团的有机聚合物,所述反应性硅官能团可通过在其分子中形成硅氧烷键而产生弹性体,和(B)分子量不小于140的有机硅化合物 并且由式(1)表示:[(CH 3)3 SiO] n R 1(1)其中R 1是具有n价的醇或弱酸的残基,n是正整数。 本发明的组合物可以得到具有优异的模量和伸长率的固化产物,并且具有优异的储存稳定性。
Abstract:
This invention provides pressure sensitive adhesive (PSA) compositions comprising a copolymer having a vinyl polymeric backbone having grafted thereto polysiloxane moieties. The compositions may contain other ingredients such as tackifier and/or plasticizer. An exposed surface of the PSA composition is initially positionable on a substrate to which it will be adhered but, once adhered, builds adhesion to form a strong bond. The PSA compositions may be used alone or in blends with unsiliconized PSA compositions. The invention also provides sheet materials coated with the PSA composition such as tape, labels, etc.