Abstract: Hydroxyl-terminal organopolysiloxanes having diorganosiloxy groups and Si—H groups are prepared by reacting the appropriate chlorosilanes with less than 0.5 mol water per mol of hydrolyzable chlorine in a first step and recovering gaseous HCl, and more fully hydrolyzing with additional water in a second step.

Abstract: Defoamer compositions of high effectiveness containing at least one siloxane-based antifoam and polysiloxane copolymers obtained by coupling a polysiloxane bearing active-hydrogen-containing hydrophilic polymer moieties by means of a di- or polyisocyanate.

Abstract: Organopolysiloxanes having quaternary ammonium groups are prepared by first, condensing organopolysiloxanes having a terminal unit HO—SiR22O1/2??(I) with aminosilanes AaRbSi(OR1)4-(a+b)??(II), where A is a monovalent SiC-bonded organic radical containing at least one tertiary amino group and free of primary or secondary amino groups, R a monovalent C1-18 hydrocarbon radical, R1 is a C1-8 alkyl radical, a is 1 or 2, b is 0 or 1, and a+b is 1 or 2, optionally with catalysts, to obtain organopolysiloxanes having tertiary amino groups, and, second, partly or fully quaternizing the organopolysiloxanes obtained in the first step with alkylating agents, no bases being added in the second step, and water is substantially absent.

Abstract: Cellulosic substrates are treated with compound(s) containing at least two primary amino groups and compounds containing at least one ?-ketocarbonyl group. The substrates exhibit good strength and hand properties.

Abstract: Emulsions of highly viscous organopolysiloxanes are prepared by reacting organopolysiloxanes having at least one Si—OH group with alkoxysilanes bearing a group BReSi(OR3)3-e wherein R is a hydrocarbon radical and B is a radical —CR22—Y where Y is halogen, monosubstituted O or S or substituted N or P, the reaction taking place as a dispersion in water, optionally in the presence of an emulsifier.

Abstract: ?-ketocarbonyl-functional organosilicon compounds in combination with an Si-free polyamine having at least two primary amino groups, provide storage stable compositions useful for fabric treating. The treated fabrics show less propensity toward yellowing.

Abstract: High-molecular-weight siloxane polymers are prepared in a multi-step process wherein an Si—H functional linear siloxane containing silanol groups is reacted with a hydrosilylatable organic compound, and the product is then condensed.

Abstract: Wood and wood products are rendered water repellant by treating the wood or wood product with a combination of compounds containing at least three amino groups at least one being a primary amino group, and a low surface tension ?-ketocarbonyl-functional siloxane polymer.

Abstract: Organosilicon compounds containing ?-ketoamide groups and organic polymer groups bound via enamine bonds are prepared by reaction of compounds bearing at least one ?-ketocarbonyl functionality with organosilicon compounds bearing aminoalkylaminoalkyl groups. The products have the same uses as siloxanes containing polyether and acetoacetate groups.

Abstract: Compositions comprising (A) an organosilicon compound of the formula Ra(R1O)bR2cSiO(4-a-b-c)/2??(I) in which R2 independently denotes a monovalent, SiC-bonded, optionally substituted, aliphatic cyclic or aliphatic branched hydrocarbon radical having at least 3 carbon atoms, R, and R1 are hydrogen or hydrocarbon radicals, the sum a+b+c?3, the organosilicon compound has at least one unit of the formula (I) with c other than 0, and in at least 50% of all of the units of the formula (I) in the organosilicon compound the sum a+b+c is 2; at least one additive (B) selected from (B1) filler particles and/or (B2) organopolysiloxane resin(s) and optionally (C) an organosilicon compound which has units of the formula (III), R5g(R6O)hSiO(4-g-h)/2 where R5 and R6 are hydrogen or a hydrocarbon radical, g+h?3 and in at least 50% of the units (III), g+h=2, are highly effective and long lasting defoamers.

Abstract: Crosslinkable silicone coating compositions are prepared from (1) organopolysiloxanes containing alkenyl groups and containing per molecule at least one unit O3-n/2RnSi—Y(SiRnO3-n/2)a ??(I), at least 2 units R1RbSiO(3-b)/2 ??(II), and units RcSiO(4-c)/2 ??(III), where R is a monovalent, SiC-bonded organic radical having 1 to 30 C atoms free from aliphatic carbon-carbon multiple bonds, R1 is an alkenyl radical having 2 to 4 C atoms, and Y is a divalent or trivalent organic radical having 1 to 30 C atoms, with the proviso that the organopolysiloxanes (1) contain units (II) in amounts wherein the concentration of alkenyl radicals R1 is less than 2 meq/g, (2) organopolysiloxanes containing Si-bonded hydrogen atoms, (3) a hydrosilylation catalyst, and (4) optionally, inhibitors. The compositions cure rapidly with few extractables and are very useful in preparing release coatings.

Abstract: Leather substrates are rendered water repellant by treatment with ?-ketocarbonyl-functional siloxane polymers containing at least one radical of the formula wherein R3 is hydrogen or a hydrocarbon radical.

Abstract: ?-ketocarbonyl-functional organosilicon compounds are prepared by reacting, organosilicon compounds containing an SiC-bonded organic radical having a primary amino group, with organic ester compounds containing a group of the formula —O—C(?O)— and, reacting the product with diketenes or diketene derivatives, to produce ?-ketocarbonyl-functional organosilicon compounds containing at least one SiC-bonded radical of the formulae —R1{—N[C(?O)—CHR5—C(?O)—CH2R5]—R1}x—NH—C(?O)—(O)v—R4{—O—[C(?O)—CHR5—C(?O)—CHR5]yH}z or —R1(—NR2?—R1)x—NH—C(?O)—(O)v—R4{—O—[C(?O)—CHR5—C(?O)—CHR5]yH}z R1 is a divalent C1-18 organic radical R2 is a hydrogen atom or a monovalent C1-18 organic radical, R5 is hydrogen, v is 1, x is 0 or an integer from 1 to 10, R2? has one of the meanings of R2 with the proviso that R2? is not a hydrogen atom, y is 0 or 1, and z is 1 or 2.

Abstract: Organosilicon compounds containing at least one silicon-bonded radical of the formula (E1)xZ-Y—C(O)—CR4?C(CH2R4)—NR2—R1— are prepared by reacting the analogous ketoester or tautomer thereof with an amino functional organosilicon compound.

Abstract: ?-ketocarbonyl-functional organosilicon compounds are prepared by reacting amino organo-functional organosilicon compounds with a diketene in the presence of a compound which inhibits the reaction of amine groups with ?-ketocarbonyl compounds.

Abstract: A process for preparing aminoalkylpolysiloxanes involves (i) mixing (1) aminoalkylsilane hydrolyzate (ARaSiO(3-a)/2)m(R1O1/2)p with ??(I) (2) linear and/or branched organopolysiloxanes R x ? ( OR 1 ) y ? SiO 4 - ( x + y ) 2 ( II ) until a dispersion is obtained, where A is a monovalent SiC-bonded hydrocarbon radical containing at least one amino group, a is 0 or 1, m is from 2 to 500, p is at least 2, x is 0, 1, 2 or 3, and y is 0 or 1, and at least 10 silicon atoms on average per molecule are present in the organopolysiloxane (2), (ii) reacting (1) and (2) in dispersion in the presence of a basic catalyst until a substantially clear mixture is obtained, and (iii) neutralizing the basic catalyst.

Abstract: Hydroxyl-terminal organopolysiloxanes having diorganylsiloxy [diorganosiloxy ??] groups and Si—H groups are prepared by reacting the appropriate chlorosilanes with less than 0.5 mol water per mol of hydrolyzable chlorine in a first step and recovering gaseous HCl, and more fully hydrolyzing with additional water in a second step.

Abstract: Hydrophilic siloxane copolymers are prepared by (a) reacting organopolysiloxanes having at least one Si-bonded hydrogen atom with substantially linear oligomeric or polymeric compounds of formula R1-(A-CnH2n)m-A1-H??(I) where R1 is a monovalent optionally substituted, hydrosilylatable hydrocarbyl radical, A is a bivalent polar organic radical selected from —O—, —C(O)—O—, —O—C(O)—, —O—C(O)—O—, —C(O)—NH—, —NH—C(O)—, urethane radicals and urea radicals, A1 is a bivalent polar organic radical selected from —O—, —NH— and —NR?—, n is an integer from 1 to 20, and m is zero or a positive integer, (b) reacting the resulting intermediate with organic compounds which have two or more isocyanate groups, in the presence of further organic compounds (6) reactive toward isocyanate groups and containing at least one tertiary amine group, and (c) quaternizing the amino-group-containing intermediate from step (b) with an alkylating agent (8), with the proviso that the water content of the compounds (1) and (2) is lower

Abstract: Defoamer compositions of high effectiveness containing at least one siloxane-based antifoam and coupling a polysiloxane bearing active-hydrogen-containing hydrophilic polymer moieties by means of a di- or polyisocyanate.

Abstract: Fibrous substrates with exacted properties are copolymer prepared by reacting an Si-H bearing polysiloxane with a compound containing both a hydrosilylatable group and an isocyanate reactive group, followed by reaction with di- or polyisocyanate used at or below the stoichiometric amount of NCO groups.