Abstract: Organosilicon compounds which contain Bunte salt groups and contain units of the general formula ##STR1## wherein R is a hydrogen atom or a monovalent organic radical, R.sup.1 is a hydrogen atom or a monovalent organic radical, R.sup.2 is a radical --QS.sub.2 O.sub.3 M, where Q is a divalent hydrocarbon radical and M is an alkali metal radical or optionally a substituted ammonium radical, a is 0, 1, 2 or 3, b is 0, 1, 2 or 3, and c is 0, 1, 2 or 3, processes for preparing the organosilicon compounds and their use are described.

Abstract: A silicone compound of the rational formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently a hydrogen atom or a hydrocarbon radical free from acetylenic unsaturaiton; Z is --O--, --S-- or --NH--; Y is a divalent organic group; R.sup.3 is a hydrogen atom, an akyl, alkenyl, alkoxy or phenyl group; and m and n are rational numbers satisfy the ration of 4>m+n.gtoreq.2. The compound is useful as a precursor of nonemanating, self-curing and heat resistant silicone resins.

Abstract: Mercaptosilanes are prepared from haloorganylsilyl compounds and an alkali metal hydrogen sulfide in the presence of a polar, aprotic medium.

Abstract: The preparation of magnesium benzyl fluoromalonate and other equivalent materials, the synthetic equivalents of the --CH.sub.2 F moiety, is described. Reaction between these reagents and the in situ-formed imidazolides of various carboxylic acids gives beta-keto-alpha-fluoroesters, which upon hydrogenation and spontaneous decarboxylation yields fluoromethyl ketones in excellent yields. The overall transformation from RCOOH to RCOCH.sub.2 F is thus illustrated.

Abstract: This invention relates to compounds of the formula a compound of the formula ##STR1## wherein X is O, CR.sub.7 R.sub.8, S or NR.sub.9 wherein R.sub.7 and R.sub.8 are independently hydrogen, or lower alkyl, and R.sub.9 is lower alkyl;n is 0 or 1;R.sub.1 and R.sub.2 are independently hydrogen, lower alkyl, monoorganosilyl, diorganosilyl, triorganosilyl, halogen, aryl, or nitro;R.sub.3 is hydrogen, lower alkyl, monoorganosilyl, diorganosilyl, triorganosilyl, halogen, 9-fluorenylalkyl, cycloalkyl, aryl or aralkyl;R.sub.4 and R.sub.5 are independently hydrogen, lower alkyl, or aryl or one of R.sub.4 and R.sub.5 is 9-fluorenyl;R.sub.6 is H or COZ wherein Z is an amino acid, a peptide residue or a leaving group; andwith the provisos that when n is 0 and R.sub.3 is hydrogen, R.sub.1 and R.sub.2 are not hydrogen, halogen or nitro; that when n is 0 and R.sub.3 is lower alkyl, R.sub.1 and R.sub.2 are not hydrogen; and that when X is O or CR.sub.7 R.sub.8 wherein R.sub.7 and R.sub.8 are H, that R.sub.1, R.sub.2, R.sub.

Abstract: A carboalkylated amino alcohol having each of the below shown formulae is novel and optically active. A separating agent comprising the alcohol and a support is effectively useful to separate a variety of racemates for example with chromatography. The alcohol may be chemically or physically combined with the support.

Abstract: Iniferter prepared release coating compositions comprising vinyl-siloxane block copolymer and blends thereof with other polymeric materials on sheet materials and the backside of adhesive tapes are provided. Controlled and predictable release is obtained through variation of the molecular weight and weight percent of the siloxane block as well as the molecular weight and composition of the vinyl block or blocks.

Abstract: Novel monomers of the general formula ##STR1## where b is 0 or 1, a is 1, 2, 3 or 4, R.sup.2 is a monovalent alkyl radical and R is an organic radical. The novel monomers may be employed to produce novel copolymers useful as hydrogel, soft non-hydrogel and/or rigid gas permeable contact lens materials.

Abstract: The present invention provides novel siloxane iniferter compounds, block copolymers made therewith, and a method of making the block copolymers. The siloxane iniferter compounds can be represented by the formula ##STR1## wherein T and X are organic groups selected so that the T-X bond is capable of dissociating upon being subjected to an appropriate energy source to form a terminator free radical of the formula T and an initiator free radical.r.sub.1, R.sub.2, R.sub.5 and R.sub.6 are monovalent moieties selected from the group consisting of hydrogen, C.sub.1-4 alkyl, C.sub.1-4 alkoxy and aryl which can be the same or are different;R.sub.3 and R.sub.4 are monovalent moieties which can be the same or different selected from the group consisting of hydrogen, C.sub.1-4 alkyl, C.sub.

Abstract: Novel alpha-mercaptoester substituted diorganopolysiloxanes, well adapted for the stabilization of vinyl chloride polymers, have the following general formula ##STR1##

Abstract: Compounds of formula I ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.4 alkyl, phenyl or benzyl,R.sub.2 is C.sub.1 -C.sub.4 alkyl, phenyl or benzyl,a is 0, 1 or 2,R.sub.3 is linear or branched unsubstituted or OH-substituted C.sub.1 -C.sub.12 alkylene or is phenylene,X is --O--, --X-- or --NR.sub.6, wherein R.sub.6 is H, C.sub.1 -C.sub.4 alkyl or --CO--R.sub.5 --OH,b is 0, orb is an integer from 1 to 6 and R.sub.4 is linear or branched unsubstituted or OH-substituted C.sub.1 -C.sub.12 alkylene,Y is --O--, --S-- or --NR.sub.7, wherein R.sub.7 is H or C.sub.1 -C.sub.4 alkyl,R.sub.5 is the divalent radical, diminished by the --CO--O group, of a lactone having a total of 4 to 7 ring members and containing at least one chiral carbon atom and corresponding predominantly to an optically active enantiomeric form, and e is an integer from 1 to 10.These compounds are suitable for the preparation of stationary phases for the chromatographic separation of chiral compounds.

Abstract: A process for synthesizing polyoxa tetracyclics which involves the ozonolysis of a single-ring-structure vinyl silane with resulting direct formation of the desired multiple ring matrial. The polyoxa tetracyclic compounds have the formula ##STR1## The vinyl silanes have the structure ##STR2## The vinyl silanes are new chemical compounds as are corresponding primary ozonide and dioxetane intermediates. In a preferred embodiment, this invention provides a total synthesis of the antimalarial artemisinin.

Abstract: Novel organosilicon compounds containing a mercapto group are provided, which compounds are of the following general formula, HSCH.sub.2 C.sub.6 H.sub.4 (CH.sub.2).sub.n Si(CH.sub.3).sub.3-m (OR).sub.m, wherein R represents a methyl group or an ethyl group, n is a value of 0,1 or 2, and m is a value or 1, 2 or 3. the ocmpounds are substantially free of any offensive odor derived from the mercapto group and are useful as a silane coupling or crosslinking agent.

Abstract: Novel alpha-mercaptoester substituted diorganopolysiloxanes, well adapted for the stabilization of vinyl chloride polymers, have the following general formula (1): ##STR1##

Abstract: Mercaptan substituted silicon compounds are produced by the reaction of amine with carboxyl. UV curable silicon compositions are produced from such compounds.

Abstract: Modified polyols having the formula R.sub.m SiXx.sub.4-m wherein m=1 to 3, X is an alkoxy group and at least one R group is either HS--R.sup.1 -- or HS--(SiR.sup.2.sub.2 O).sub.n -- are described. The modified polyols, when mixed with base polyol, are used in the manufacture of graft polymer polyols having low viscosity and good filtrability. The graft polymer polyol can be used in the manufacture of polyurethane foam.

Abstract: Polymerizable .alpha., .beta.-unsaturated carbonyl-functional silicone compositions are obtained from the reaction of thiol-functional organopolysiloxanes with an .alpha., .beta.-unsaturated carbonyl-functional compound having at least two acryloyl or methacryloyl groups or mixtures thereof per molecule in the presence of a base catalyst.The .alpha., .beta.-unsaturatured carbonyl-functional silicone compositions may be combined with a photosensitizer and/or a free radical generator and polymerized by radiation and/or heat.

Abstract: Compounds of the general formula I are disclosed as useful intermediates in the preparation of prostanoids: ##STR1## wherein A represents O or H, OR.sup.z ;R.sup.z represents hydrogen or a protecting group;R.sup.x represents hydrogen or a protecting group; andR.sup.y represents halogen, a substituted thio group, di-substituted amino group, or a group of the formula R.sup.2, and R.sup.2 represents a straight- or branched-chain alkyl alkenyl or alkynyl group which may optionally be substituted by one or more carboxyl, carboxylic acid ester, or free or protected hydroxyl, thiol, aldehyde or keto groups;with the provisos that R.sup.x is not hydrogen when A is O and R.sup.y is R.sup.2 ; and that when A is H, OR.sup.z R.sup.y and R.sup.2 and R.sup.x and R.sup.z are not both hydrogen.Processes for the preparation of these compounds and of 2-substituted 4-hydroxy-cyclopent-2-en-1-one derivatives are also disclosed.

Abstract: A class of novel organosilane compounds are disclosed as represented by the general formulaRSi(OCH.sub.2 CF.sub.3).sub.3,in which R is an atom or group selected from the class consisting of a hydrogen atom, unsaturated monovalent aliphatic hydrocarbon groups having from 2 to 20 carbon atoms, monovalent aryl groups and monovalent organic groups having from 3 to 20 carbon atoms and containing at least one hetero atom, i.e. an atom other than carbon and hydrogen atoms, such as oxygen, halogens, sulfur and nitrogen, the said hetero atom-containing organic group being bonded to the silicon atom through a carbon-to-silicon linkage. Several particular compounds belonging to the class were synthesized and identified.

Abstract: Polyorganosiloxane polymers which include at least one group of the formula: ##STR1## where R.sup.1 is an organo group; R.sup.2 is alkylene or alkenylene; G is a n+1 valent hydrocarbon, oxyhydrocarbon or poly(oxyhydrocarbon) radical in which some or all of the hydrogen atoms may optionally be substituted by halogen atoms; R.sup.3 is H or an organic functional group, particularly polymerizable groups, polymerization accelerating groups or polymerization initiating groups; n is an integer of 2 or more provided that when n is 2 and one of R.sup.3 is H, the other R.sup.3 group is also H; and a is 0, 1 or 2.Additional polyorganosiloxane polymers include at least one group of the formula: ##STR2## where R.sup.4 R.sup.5 are H or a mono valent hydrocarbon group.

Abstract: A mercapto-functional silicone fluid is prepared by hydrolyzing a mercapto-silane and an organosilane, with a weak acid. The hydrolyzate is, then, reacted in the presence of an acid with a mixture of an end-blocking polyalkylpolysiloxane and a chain-extender which is either a cyclic polysiloxane or an alkyl-terminated or hydroxy-terminated silicone fluid.

Abstract: The silahydrocarbon product containing at least 75 weight percent of saturated silahydrocarbons with the remainder being unsaturated silahydrocarbons is produced by a process in which admixture comprising(A) at least one alpha-olefin containing from 2 to about 20 carbon atoms per molecule, and(B) at least one alkylsilane selected from the group consisting of(i) a dialkylsilane having the formulaR--SiH.sub.2 --R.sub.1(ii) a trialkylsilane having the formula ##STR1## and (iii) mixtures thereof,wherein R and R.sub.1, the same or different, each represent an alkyl radical of from one to 20 carbon atoms per molecule with a catalyst comprising a homogeneous rhodium-containing catalyst or a heterogeneous rhodium-containing catalyst in a halogen-free inert solvent, under hydrosilylation reaction conditions to produce a mixture containing saturated and unsaturated silane hydrocarbons useful as lubricants.

Abstract: The present invention relates to the preparation of mercapto alkyl silanes. It sets out from the known reaction of halogen alkyl silanes with thiourea and ammonia, in which guanidine hydrohalides are produced. The separation of these guanidine hydrohalides is performed in accordance with the invention by treating the reaction mixture with a chlorinated hydrocarbon at the end of the reaction. The amount of the chlorinated hydrocarbon is between 20 and 100% of the volume of the input halogen alkyl silane. The treatment with the chlorinated hydrocarbon can be performed either by pouring the latter into the still-hot reaction mixture, or by pouring the still-hot reaction mixture into the chlorinated hydrocarbon. It is advantageous for the precipitation solution that forms to have a temperature above 70.degree. C. after the performance of the precipitation. The filtering out of the precipitated guanidine hydrohalide is performed preferably at room temperature.

Abstract: 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.

Abstract: A lubricating agent for processing thermoplastic synthetic fibers contains at least one new type of silyl polyether obtainable by a reaction between polyether of a special type derivable by ring-opening addition polymerization of cyclic ether monomers and halogenated substituted silane. If such lubricating agent is used appropriately during the processing of thermoplastic synthetic fibers, both the coefficient of fiber friction and the rate of generating tar can be reduced.

Abstract: A trifluoromethyl-phenoxy-phenyl-silicon compound is disclosed of the general formula ##STR1## in which X.sup.1 and X.sup.2 independently of each other represent a hydrogen, fluorine, chlorine, bromine or iodine atom,Y represents a hydrogen or halogen atom or a cyano or nitro group,n is 0 or 1,m is 0, 1, 2 or 3,p is 0, 1, 2 or 3,X.sup.3 and X.sup.4 independently of each other represent oxygen or a --CO--O-- group,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent a hydrogen atom or a C.sub.1 to C.sub.5 alkyl group,R.sup.5 and R.sup.6 independently of each other represent a C.sub.1 to C.sub.5 alkyl group, andR.sup.7 represents a C.sub.1 to C.sub.5 alkyl or hydroxyl group, a chlorine, bromine, or iodine atom or a C.sub.2 to C.sub.5 alkenoxy, C.sub.2 to C.sub.5 alkinoxy,C.sub.1 to C.sub.5 alkylthio, C.sub.2 to C.sub.5 alkenyl-thio or C.sub.2 to C.sub.5 alkinyl-thio group or a C.sub.1 to C.sub.

Abstract: Pyromellitate tetraesters are disclosed that are useful as water repellents. The pyromellitates of this invention characteristically contain two ester moieties wherein said ester moieties contain a fluorinated or saturated hydrocarbon alkyl group. Additionally, pyromellitates of this invention contain two ester moieties which contain siloxyl groups.

Abstract: This invention relates to polymeric organosilicon compounds containing aryl radicals and to a method for improving the gliding or slipping properties of organic fibers treated therewith. The polymeric organosilicon compounds are represented by the formulaM.sub.a R.sub.b Si{[(OSiR.sub.2).sub.n D].sub.m (OSiR.sub.2).sub.n OSiR.sub.3-d M.sub.d }.sub.4-a-bin which R is hydrocarbon or substituted hydrocarbon radical, D represents radicals of the formula--X.sub.a A--X.sub.a (A--X.sub.a).sub.c --,X represents the groups: ##STR1## --NR'--, --O--, --S--, --SO.sub.2 --, --R"--, --NR'R", ##STR2## --OR"--, --SR"--, --SO.sub.2 R", where R' is hydrogen or R, R" is a bivalent aliphatic hydrocarbon radical, A is a bivalent or substituted bivalent aromatic hydrocarbon radical, M represents radicals of the formula--X.sub.a --A--X.sub.a (A--X.sub.a).sub.c H,a is 0 or 1, b is 0, 1 or 2, c is 0 or a number of from 1 to 5, m is 0 or a number of from 1 to 20, n is a number of from 1 to 1,000 with the proviso that at least one OSiP.

Abstract: Novel bis-(silylethyl)-oligosulphides are obtained by reacting a vinyl silane of the formula (CH.sub.2 .dbd.CH).sub.m -SiR.sub.n.sup.1 R.sub.4-(m+n) in which R represents chlorine, bromine, iodine, C.sub.1 -C.sub.3 -alkoxy, 2-methoxyethoxy, 2-ethoxyethoxy or hydroxy, R.sup.1 represents C.sub.1 -C.sub.3 -alkyl, phenyl or C.sub.5 -C.sub.7 -cycloalkyl, n is 0, 1 or 2, m is 1 or 2 and m+n is 1, 2 or 3 with sulphur as well as in a given case hydrogen sulphide in molar ratios of vinyl silane to sulphur of from 1:2.5 to 1:10 and vinyl silane to hydrogen sulphide of from 1:0 to 1:5 at temperatures between about 100.degree. and 200.degree. C. under pressure of from 1 to 25 bars (total pressure at the reaction temperature) and in the presence of sulphidation catalysts known per se, in a given case followed by hydrolysis or partial hydrolysis of the reaction products.

Abstract: An improved method for the production of mercapto functional silanes is provided whereby reactions between haloalkyl silanes and thioureido compounds in the presence of ammonia are accelerated with tertiary nitrogen-containing compounds. In a preferred embodiment the reaction of 3-chloropropyltrimethoxysilane with thiourea is accelerated by N,N-dimethylformamide and other compounds to produce 3-mercaptopropyltrimethoxysilane at lower temperatures and with increased yield.

Abstract: Compounds of the general formula I are disclosed as useful intermediates in the preparation of prostanoids: ##STR1## wherein A represents O or H, OR.sub.z ;R.sup.z represents hydrogen or a protecting group;R.sup.x represents hydrogen or a protecting group; andR.sup.y represents halogen, a substituted thio group, di-substituted amino group, or a group of the formula R.sup.2, and R.sup.2 represents a straight-or branched-chain alkyl alkenyl or alkynyl group which may optionally be substituted by one or more carboxyl, carboxylic acid ester, or free or protected hydroxyl, thiol, aldehyde or keto groups;with the provisos that R.sup.x is not hydrogen when A is O and R.sup.y is R.sup.2 ; and that when A is H, OR.sup.z R.sup.y is R.sup.2 and R.sup.x and R.sup.z are not both hydrogen.Processes for the preparation of these compounds and of 2-substituted 4-hydroxy-cyclopent-2-en-1-one derivatives are also disclosed.

Abstract: Leaks in a vessel or pipeline or the like, adapted for containing a fluid, are sealed by means of a volatilized polymerizable organosilane comprising a mercaptosilane, an acyloxysilane, or an alkoxysilane taken on conjunction either with acetic acid anhydride or an amine, or mixtures thereof, the organosilane being supplied to the interior of the vessel or pipeline under sufficient pressure and for a sufficient period of time to permit contact and chemical reaction thereof in the presence of moisture or sand at the situs of the leak to provide a solid polysiloxane seal.

Abstract: This invention relates to sulfur containing polysiloxane polymers having units of the general formula(M).sub.x (T').sub.ywherein M represents an R.sub.3 SiO.sub.0.5 unit in which R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical having from 1 to 18 carbon atoms, T' represents a unit of the formula(R"S).sub.z R'SiO.sub.1.5in which R' is a divalent, trivalent or tetravalent hydrocarbon radical having from 2 to 18 carbon atoms or divalent, trivalent or tetravalent hydrocarbon radicals having at least one --C--S--C-- group, R" is hydrogen or R, x and y each represent a number greater than 1 and up to 20,000, in which the ratio of x to y may vary from 1:0.33 to 0.005:1 and z is 1, 2 or 3.These sulfur containing polysiloxane polymers are prepared by reacting in the presence of an acid catalyst a mixture containing (1) a hexaorganodisiloxane and (2) a silicon compound having the formula(R"S).sub.z R'Si(OR).sub.3in which R, R' and R" are the same as above.

Abstract: Sulfur-containing organosiloxanes are prepared and can be used in the preparation of storage stable compositions curable to elastomers at room temperature. The organopolysiloxanes are alkoxy functional siloxane polymers characterized by a non-oxygen containing linkage between alkoxysilyl groups and the siloxane polymer chain. The non-oxygen linkage contains sulfur.

Abstract: Compositions containing organopolysiloxanes and thiofunctional polysiloxanes having at least one mercaptan group which are effective as corrosion inhibitors and as release agents for metal substrates.

Abstract: What is disclosed is a composition of matter which is an aqueous dispersion of an organothiolsilsesquioxane and colloidal silica which is useful as an adhesion promoter for siloxane resins which have a low degree of substitution.

Abstract: The invention relates to a process for preparing thiofunctional polysiloxane polymers which comprises equilibrating in the presence of an acid catalyst a mixutre containing (1) an organopolysiloxane having at least four silicon atoms per molecule and (2) a thiofunctional polysiloxane copolymer having at least one unit of the formula ##EQU1## and the other units are selected from the formulas R.sub.2 SiO, R.sub.3 SiO.sub.0.5, and RO.sub.0.5, wherein R is a monovalent hydrocarbon radical having from 1 to 18 carbon atoms, R' is a substituted or unsubstituted divalent, trivalent or tetravalent hydrocarbon radical free of aliphatic unsaturation having from 1 to 18 carbon atoms, hydrocarbon ether, hydrocarbon thioether, hydrocarbon ester and hydrocarbon thioester radicals, R" is a monovalent hydrocarbon radical or hydrogen, f is a number of from 1 to 3, g is a number of from 0 to 1 and the sum of f+g is from 1 to 3 and y is a number of from 1 to 3.

Abstract: This disclosure describes 11-deoxy-11-substituted members of the E.sub.2, F.sub.2, E.sub.1, F.sub.1, dihydro E.sub.1 and dihydro F.sub.1 prostaglandin series which are useful as hypotensive agents and as anti-ulcer agents.

Abstract: A two-stage process for producing gamma-mercaptopropyltrialkoxysilane which comprises reacting beta-cyanoethyltrialkoxysilane with hydrogen sulfide in the presence of an amide to form a novel gamma-trialkoxysilylthiopropionamide intermediate followed by reducing said intermediate with hydrogen in the presence of a transition metal polysulfide.

Abstract: Organosilanes containing aliphatic double bonds and a process for preparing the same which comprises reacting an organic compound having more than one aliphatic double bond with a silane having an Si-bonded hydrogen atom and at least one hydrolyzable group and/or at least one group capable of being hydrolyzed more readily than the Si-bonded hydrogen atom in the presence of a catalyst which promotes the addition of Si-bonded hydrogen atoms to aliphatic double bonds.These organosilanes are used as reinforcing agents for compositions containing organic polymers which are crosslinked by means of sulfur or free radicals.