Abstract: The invention relates to activators for the depolymerization of polysiloxanes which are crosslinked, optionally contain fillers and/or are uncrosslinked, a method for the depolymerization of polysiloxanes which are crosslinked, optionally contain fillers and/or are uncrosslinked, and their use.

Abstract: A process for compressing ethylenically unsaturated monomers at a pressure of 200-5000 bar in the absence of a polymerization initiator comprises carrying out compression in the presence of a sterically hindered amine derivative.

Abstract: Copolymers of ethylene with .alpha.,.beta.-unsaturated carboxylic acids are prepared at from 50.degree. to 250.degree. C. and from 500 to 5000 bar in a stirred autoclave having a length/diameter ratio greater than 5:1 by a process in which the monomer mixtures are fed into the autoclave in at least two part-streams, the first part-stream being passed into the autoclave at the beginning of the autoclave pipe and the second part-stream being introduced at a position which is a distance away from the beginning which corresponds to 25-50% of the total length and the amount of the .alpha.,.beta.-unsaturated carboxylic acids in the first part-stream is from 20 to 90% less than the average amount in the further part-streams and a peroxide polymerization initiator having a lower decomposition temperature, or a mixture of peroxide polymerization initiators having a lower average decomposition temperature, than that of the initiators in the further part-streams is passed in with the first part-stream.

Abstract: Prints are produced by the offset heatset process using a printing ink based on mineral oil and additionally using an agent for increasing the abrasion resistance of the prints, where the agent for increasing the abrasion resistance is an oxidized olefin polymer which has a melt viscosity of from 100 to 15,000 mm.sup.2 /s, measured in accordance with DGF M-III 8 (75), and an acid number of from 5 to 50 mg of KOH/g of polymer, measured in accordance with DGF M-IV 2 (57).

Abstract: A process for compressing ethylenically unsaturated monomers at a pressure of 200-5000 bar in the absence of a polymerization initiator comprises carrying out compression in the presence of a sterically hindered amine derivative.

Abstract: Reaction products of titanates with .beta.-dicarbonyl compounds and citrates and their use in one-component RTV silicones.

Abstract: A process for improving the storage life of a one-component silicone paste containing an alkali metal phosphate and which cures with elimination of acetic acid on exposure to atmospheric moisture, which comprises adding to such paste an acidic additive bearing the functional group --SO.sub.3 H or hydrogen chloride in a concentration sufficient to convene the alkali metal phosphate into the alkali metal salt of the acidic additive.

Abstract: Compounds of the general formula(R.sup.3 O).sub.3-n R.sup.4.sub.m Si--(CH.sub.2).sub.z --XwhereinR.sup.3, R.sup.4 represent identical or different linear or branched C.sub.1 -C.sub.20 alkyl groups or alkoxyalkyl groups,X represents a halogen atom,an aminoaryl group, wherein the aromatic group can optionally carry, on one or more carbon atoms at any position, C.sub.1 -C.sub.20 alkyl groups or alkoxyalkyl groups, halogen atoms or other functional groups.or a hydroxyl group or a C.sub.1 -C.sub.20 alkoxyalkyl group, which is substituted at one or more carbon atoms at any position by one or more hydroxyl groups,n=0, 1 or 2 andz=an integer between 1 and 20 aresuitable as adhesion promoters in 1K-RTV compounds which have titanium compounds as condensation catalysts.

Abstract: This invention relates to one-component silicone systems (herein referred to as 1-C-RTV compounds) which cure rapidly under the effect of moisture with elimination of certain carbonamides, develop good adhesion to many substrates in the process and give vulcanizates that are stable under extreme climatic conditions.

Abstract: Reaction products of titanates with .beta.-dicarbonyl compounds and citrates and their use in one-component RTV silicones.

Abstract: Molded, one-piece articles having selected surfaces suitable for adherent metallization, molded, metallized, one-piece articles and processes for making the articles are disclosed. The molded one-piece articles may be formed by: molding into a first mold cavity a first portion of the article using a first electrically insulating material which is capable of adhesion promotion by an adhesion promotion process and is catalytic for adherent metallization or is capable of being rendered catalytic for adherent metallization by an activating process; inserting the first portion into a second mold cavity; and molding into the second mold cavity a second portion of the article using a second electrically insulating material, leaving selected surfaces of the first portion exposed.

Abstract: In the production of a triorganylsily or organodiorganylsilyl end-terminated poly-(diorganosiloxane) by reacting an .alpha.,.omega.-dihydroxypoly(diorganosiloxane) with a tetraorganyloxysilane or organotriorganyloxysilane in the presence of at least one alkali hydroxide, alkali alkoxide or alkali silanolate as a catalyst, the improvement which comprises effecting the reaction also in the presence of additionally at least one alkali metal salt which is soluble in the reactive system.

Abstract: The present invention relates to a process for the production of diorganyloxyorganosilyl- or triorganyloxysilyl-terminated poly(di-organosiloxanes) by reaction of .alpha.,.omega.-dihydroxypoly(diorganosiloxanes) with alkoxysilanes in the presence of catalytically active strong alkali metal bases.

Abstract: A transport system for shipping microbiological specimen samples which maintains the life of the bacteria contained in the sample and protects the environment from escape of samples comprises:(a) a first container provided with removable closure and containing a medium for storing the sample, and(b) a second container provided with a removable closure cap having an elongate chamber into which one end of a rod disposed therein can be pushed, said rod bearing a swab at its other end,the dimensions of the first and second containers, of the chamber in the closure cap and of the rod carrying the swab being so selected that the first container and a rod inserted therein in the medium and carrying the swab can be contained in the second container closed by the closure cap.

Abstract: A process for bonding metal directly to thermoplastic polymeric base materials and a process for producing printed circuits from such metal clad thermoplastic polymeric base materials are provided. The invention also includes the articles so produced. Metal clad thermoplastic polymeric base materials are produced by laminating a metal foil or sheet to thermoplastic polymeric base material, under pressure, at a temperature from about 2.degree. C. to about 45.degree. C. above the glass transition temperature (Tg) of the thermoplastic. The polymeric material is free of volatile materials such as moisture or solvents when laminated.

Abstract: Polyisocyanate preparations containing latent tin catalysts are made from an organic polyisocyanate and a reaction product of a sulfonyl isocyanate and an organic tin catalyst in which at least one tin-oxygen bond is present. The organic tin catalyst preferably contains a tin-alkoxy, tin-siloxy, distannoxane and/or tin-carboxylate group. The reaction product of a sulfonyl isocyanate with a tin-carboxylate must generate carbon dioxide during its formation. The sulfonyl isocyanate and organic tin compound are used in quantities such that at least one isocyanato-sulfonyl group is present for each tin-oxygen bond. These polyisocyanate preparation are storage stable and may be used to produce adhesives, coatings and foams.

Abstract: Materials useful as bonding agents for silicone 1K-and 2K-sealing compositions are the reaction products of 2-(aminoethyl) -aminopropyl-alkoxy silanes of the following formula:H.sub.2 NCH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 CH.sub.2 Si(OR.sup.1).sub.m R.sup.2.sub.3-mwith chlorosilanes of the following formula:R.sup.3.sub.a R.sup.4.sub.b SiCl.sub.4-(a+b)whereinR.sup.1, R.sup.2, R.sup.3 and R.sup.4, independent of each other, are alkyl having 1 to 8 carbon atoms, cycloalkyl having 3 to 8 carbon atoms, alkenyl having 2 to 8 carbon atoms or cycloalkenyl having 3 to 8 carbon atoms;m is 2 or 3,a and b are 0, 1 or 2 and the sum of a and b is 0, 1 or 2.

Abstract: Polydiorganosiloxane compositions which are stable in storage with exclusion of moisture and which are curable with water or atmospheric air are useful to produce paintable joint sealing compounds and coating composition and the composition is a mixture of .alpha., .omega.-dihydroxy-polydiorganosiloxanes, carboxylic acid amido alkylalkoxy silicon compounds as cross-linking agents, complex titanic acid esters and filler which comprises a precipitated, hydrophobicized chalk whose residual moisture has been removed before contact with the titanic acid esters and cross-linking agents in the mixture.

Abstract: A sensitized lithographic printing plate is produced from an aluminum base which has been mechanically, chemically and/or electrochemically pretreated and anodically oxidized in a conventional manner and a photosensitive copying layer which is applied to this base, by a process in which a thin layer which imparts hydrophilic properties and consists of a hydrolysis product or condensate of one or more silanes is applied between the base and the copying layer.These lithographic printing plates are particularly useful for offset printing.

Abstract: A photopolymerizable mixture containing one or more ethylenically unsaturated, photopolymerizable or photocrosslinkable compounds and a photopolymerization initiator which comprises a combination of an aromatic carbonyl compound of the type stated in claim 1 and an s-triazine compound containing one or more halogen-substituted methyl groups, photosensitive recording elements which possess a photopolymerizable recording layer consisting of these photopolymerizable mixtures, and a process for the production of lithographic printing plates using these recording elements.