Dynamit Nobel Aktiengesellschaft

Huels Troisdorf Ag

Horst Hanisch

Jurgen Amort

Hansjurgen Hass

Karl-Martin Rodder

Gunther Bernhardt

Robert Buning

Hendrikus Van Der Maas

Ute Klapdor

Hans P Suerken

Margret Haas

Hermann Peeters

Heinz Kragl

Rudolf Burkhardt

Gunter Vogel

Hans-Jurgen Hass

Guenther Bernhardt

Hans-Peter Suerken

Theo Lenz

Disclosed is a casting resin based on acrylic acid esters having a high content of finely dispersed fillers and containing a mixture of organosilicon compounds having functional groups and metallic acid esters of metals of Groups IVB and VB of the Periodic Table of the Elements. The functional group of the organosilicon compound is ethylenically unsaturated and bound to the silicon atom either directly or through alkylene groups. The addition of this mixture to the casing resins produces a desirable reduction of the viscosity of these resins, which are used, for example, for the manufacture of sanitary articles. The filler content is at least 20% and can be as high as 95% with the proviso that when the filler content is in excess of 80 wt. -%, the filler contains 10 to 30 wt. -%, based on the total weight of filler, of fines having a particle size less than 0.1 mm and the remainder of the filler being coarse up to 4 mm.

Casting resins based on acrylic acid esters

The present invention is in the preparation of methacrylic or acryloxyalkylalkoxysilanes by the reaction at a temperature of from 80.degree. and 130.degree. C. of an alkali (meth) acrylate with a halogen alkylalkoxysilane in the presence of a quaternary ammonium salt which has long-chin alkyl moieties, in which the sum of all carbon atoms is between 10 and 40 as a phase-transfer catalyst. In the new procedure no solvents need to be used. The yields are better than 95%.

Method for the preparation of organosilanes containing methacryloxy or

Disclosed are casting resins made from acrylic acid esters with a high content of finely dispersed fillers. The casting resins contain a polymeric organosilicon compound having functional and nonfunctional groups. As functional groups, the copolymer contains one or more alkoxysilyl groups and one or more (meth)acryloxysilyl groups. The copolymer furthermore contains by copolymerization at least one nonfunctional comonomer having an ethylenically unsaturated grouping as well as an additional comonomer of the group of the vinyl carboxylic acid esters and (meth)acrylic acid esters, if desired. The addition of these polymeric organosilanes to known casting resins brings about a greater lowering of the viscosity of these resins, which are used, for example, for the manufacture of sanitary appliances.

Casting resins on the basis of acrylic acid esters

Disclosed is a casting resin of reduced viscosity based on methacrylic acid esters with a high content of aluminum hydroxide as filler containing a mixture of at least one organosilicon compound with a functional group, at least one silicic acid ester, and at least one organic metallic acid compound of metals of Groups IVB and/or VB of the Periodic Table of the Elements. The functional group of the organosilicon compound is ethylenically unsaturated and bound to the silicon atom either directly or by alkylene groups. The casting resins of the invention have improved working qualities. Plastic objects and moldings manufactured from these resins have decidedly improved use properties.

Aluminum hydroxide filled casting resins on a basis of methacrylic acid

Disclosed is a process for the performance of organic reactions in the liquid phase wherein silicone oils are used as the reaction medium. These silicone oils have no functional groups, are liquid at room temperature and have viscosities between 40 and 20,000 cs. at 25.degree. C. The obtained reaction products are very pure and generally do not require additional purifying operations.

Method for performing organic reactions in silicone oils

The present invention relates to copolymers which can be used as adhesion mediating agents (adhesivers) between polymers and inorganic-oxide material. They are characterized by a reactive alkoxysilyl group and an acrylic or methacrylic acid moiety. Each of these two groups is linked to a fundamental constituent having two chain carbon atoms, this fundamental constituent being constructed on a compound having an ethylenically unsaturated group as monomer. The ratio of the alkoxysilyl groups to the acrylic or methacrylic acid esters in the new copolymers can be established as desired, for example by copolymerizing the copolymers with other compounds having ethylenically unsaturated groups, which do not have the above-named moieties. The present invention also relates to a method of preparing these new copolymers as well as intermediates which occur in the practice of this method, as formerly unknown products.

Adhesivizing agent copolymers containing both acrylate or methacrylate

The present invention relates to liquid mixtures of alkali metal silicates, water, and trialkoxysilanes of the general formula R--Si(OR').sub.3, which harden to form silica-containing gels within a predetermined length of time. The mixtures can contain additional means for influencing the gelling and the gel strength. The most important field of application of the gels in accordance with the invention is the stabilization of soils in architecture and civil engineering.

Gel-forming mixture based on an alkali silicate and a trialkoxysilane

The present invention relates to new organosilane esters which can be characterized by the formula Y-(CH.sub.2).sub.n Si(CH.sub.3).sub.p -X.sub.m Z.sub.3-(m+p). In this formula, Y represents either a substituted or unsubstituted amino group, or it represents the mercapto moiety or the moiety ##STR1## X represents an alkoxy group with 1 to 4 carbon atoms and Z a glycol ether moiety. The index n can assume the numerical values from 1 to 3, m can be 0 or 1 and p can be 0 or 1 or 2, on the condition that m+p is equal to or less than 2. The new silanes yield very stable hydrolyzates and have good adhesion-improving properties. They are therefore particularly well suited for use in sealing compositions.

Organosilane esters having glycol ether moieties

The present invention is in the modification of starch by silanes and is performed by bringing the starch into intimate contact with the hydrolyzates of the silanes in the presence of alkali aluminates or alkali hydroxides. Preferably this is done in the aqueous solution of the silane hydrolyzate, in which case the additives can be used either in aqueous solution or in solid form. The aluminate or alkali hydroxide is present at least in such an amount that 0.4 mol of aluminate will be present for each mole of silane. The modification is possible not only with alkyl alkoxysilanes, but also with organofunctional alkoxysilanes. The starch modified with the silanes has better practical properties than corresponding unmodified starch and can be used, for example, for the hydrophobation and oleophobation of cellulosic material.

Method for the modification of starch in an aqueous medium

A method for the modification of starch by silanes wherein the starch and silane are contacted in an organic solvent in the presence of a metallic acid ester of a metal of groups IVB or VB of the Periodic Table of the elements. The resulting suspension is stirred. The subsequently separated starch exhibits better working characteristics than the corresponding unmodified starch.

Method for the modification of starch in the presence of solvents

Aqueous filler suspension composed of inorganic oxide material and a dispersing agent, characterized in that it contains as dispersing agent an aqueous solution of maleic acid-vinyl alkoxysilane copolymer.

Aqueous suspension of inorganic oxidic material

An aqueous solution of a mixture of silicon-organic compounds comprising:

Aqueous solution of mixtures of silicon-organic compounds

An aqueous solution of a mixture of silicon-organic compounds comprising: A. A silane of the general formula: ##STR1## wherein a is 1 or 2, b is 0, 1 or 2, and a +b is equal to or less than 3, p is 0 or 1, and R represents an alkylene moiety of 1 to 8 carbon atoms or arylene moiety, R' represents an alkyl moiety, X represents a hydrolizable moiety and Y represents a functional group or the CH.sub.3 or the CH.sub.2 .dbd.CH moiety, and B. A copolymer having the recurrent unit of the general formula: ##STR2## wherein R' represents OH and/or [O].sup.- [NH.sub.4 ].sup.+ and/or [O].sup.- [Me].sup.+ where Me is an alkali or alkaline earth metal and Z can represent a moiety of the formula: ##STR3## wherein R'' represents an alkyl moiety. Also disclosed are new copolymers having the recurrent unit ##STR4## wherein at least one of the Z moieties is a moiety having the formula ##STR5## wherein R'' represents an alkyl moiety. Also disclosed are the use of the aqueous solutions as coating agents for metals, inorganic oxidic and inorganic sulfidic materials. There is also disclosed the use of such aqueous solutions of silicon organic compounds as adhesivizing agents especially for securing inorganic oxidic materials to polymers.

A camouflage impregnating agent comprising a silver salt dissolved in an alcoholic solution of an alkyl trialkoxysilane; a process for camouflaging an oxidic surface by applying thereto a camouflage impregnating agent comprising a silver salt dissolved in an alcoholic solution of an alkyl trialkoxysilane.

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Hennef, Germany

Horst Hanisch