Abstract: Silicone elastomer-containing 3D articles are printed by a drop on demand technique using at least one first crosslinkable silicone as a structure forming material and at least one further structure forming material which is preferably a crosslinkable silicone different from the first crosslinkable silicone.

Abstract: Silicon elastomer articles are prepared by a 3-D printing process by depositing droplets of high viscosity curable silicone onto a substrate layer by layer from independently spatially controllable nozzles and irradiation with independently spatially controllable electromagnetic energy.

Abstract: Silicon elastomer articles are prepared by a 3-D printing process by depositing droplets of high viscosity curable silicone onto a substrate layer by layer from independently spatially controllable nozzles and irradiation with independently spatially controllable electromagnetic energy.

Abstract: Isocyanate-free foamable mixtures suitable for filling construction voids and for other uses, comprise isocyanate-free, alkoxysilane-terminated prepolymers (A) which have a silane end group of the formula [1], where X and Y are each an oxygen atom, an N—R3 group or a sulfur atom, R1 is an alkyl, cycloalkyl, alkenyl or aryl radical having 1-10 carbon atoms, R2 is an alkyl radical having 1-2 carbon atoms or an ?-oxyalkylalkyl radical having a total of 2-10 carbon atoms, R3 is a hydrogen atom, an alkyl, alkenyl or aryl radical having 1-10 carbon atoms or a —CH2—SiR1z(OR2)3-z group, and z is 0 or 1, with the proviso that at least one of the two groups X and Y is an NH function, and (B) blowing agents.

Abstract: Both flexible and rigid foams may be prepared by reacting di- or polyisocyanates with organopolysiloxanes which are prepared by reaction of silanol-terminated organopolysiloxanes with organosilicon compounds containing alkyleneoxy or alkylenamino groups bonded on both ends to silicon, thus resulting in organopolysiloxanes having 95% or more of aminoalkyl or hydroxyalkyl terminal groups.

Abstract: One-component, moisture curing compositions which exhibit rapid curing, even with exceptionally low levels of catalyst or with no catalyst at all, can be formulated from alkoxysilane-terminated polymers having alkoxysilane groups bonded to an electronegative, free electron-pair-containing heteroatom via a methylene linking group. Polymer blends containing the alkoxysilane-terminated polymers exhibit rapid cure, even at room temperature, and allow the use of nitrogen containing components such as adhesion promoters.

Abstract: Alkoxysilane-terminated polymers prepared by reacting an isocyanatoalkoxysilane, preferably an isocyanatodialkyalkoxysilane, with an isocyanate-reactive prepolymer, can provide chain extension even when a monoalkoxy-functional silane, while retaining suitable reactivity profiles. The products are useful in sealants, caulks, coatings, and moldings.

Abstract: Alkoxy-crosslinking one-component moisture curing compositions contain a polymer bearing (alkoxy)(methyl)silylalkyl-terminal groups, and specific silanes as described herein. The compositions exhibit improved shelf life and yet retain other desirable characteristics.

Abstract: Crosslinkable RTV-1 compositions with enhanced physical properties include an alkoxy-functional polydiorganosiloxane having alkoxy-functional silyalkylene groups linked to a polydiorganosiloxane via ureaalkylene groups, prepared by reacting an ?,?-dihydroxyorganopolysiloxane with a silazane and with a silane of formula OCN—X-SirR1a(OR2)3-a, ??(6) where R0, R1, R2, and R3 are optionally substituted hydrocarbon groups.

Abstract: Curable, silane-terminated polydiorganosiloxane-urethane copolymers exhibit the beneficial properties of isocyanate-terminated polysiloxane-urethane copolymers without the detriments associated with free isocyanate groups.

Abstract: The invention relates to moisture cross-linking compositions containing (A) 100 parts per weight of a silane-terminated polydiorganosiloxane-urea/urethane copolymer of general formula (1), and (B) between 0.1 and 20 parts per weight of silane of general formula (3): ?-(CH2)e—Si(R2)3-f(CH3)f, in which R, X, A, Y, D, B, W, n, a, b, c, d, ?, R2, e and f are defined as per claim 1.

Abstract: Organopolysiloxane/polyurea/polyurethane block copolymer elastomers exhibiting improved physical properties are prepared by reacting diisocyanates with aminoalkyl-functional organopolysiloxanes containing substantially no cyclic siloxanes, prepared by reacting a cyclic silazane with a bis(hydroxy)-organopolysiloxane. Traditional hydroxyl and amino-functional chain extenders may be reacted as well, to produce a wide range of block copolymer elastomers.

Abstract: Surface-modified solids bearing groups of the formula I SiR12—R—NH2??(I), are prepared by reacting a solid having OH groups on a surface thereof with a cyclic silazane of the general formula II where R is a divalent optionally substituted hydrocarbon radical optionally containing heteroatom containing groups, and R1 is a hydrogen atom, or a monovalent optionally substituted hydrocarbon or hydrocarbonoxy group optionally containing heteroatom-containing groups. The surface-modified solids are preferably metal oxide particles. Such surface-modified particles are useful in numerous products.

Abstract: The invention relates to a method for the production of hydroxyalkyl polysiloxanes of general formula (V) (SiO4/2)k(R12SiO3/2)m(R12SiO2/2)p(R13SiO1/2)q[O1/2SiR32—(CR42)b—OH]5[O1/2H]t (V), wherein organosiloxanes of general formula (VI) (SiO4/2)k(R1SiO3/2)m(R12SiO2/2)p(R13SiO1/2)q[O1/2H]r(VI) containing silanol are made to react with compounds having at least one unit of general formula (IV) [O—(CR42)b—SiR32]n—(IV).

Abstract: Both flexible and rigid foams may be prepared by reacting di- or polyisocyanates with organopolysiloxanes which are prepared by reaction of silanol-terminated organopolysiloxanes with organosilicon compounds containing alkyleneoxy or alkylenamino groups bonded on both ends to silicon, thus resulting in organopolysiloxanes having 95% or more of aminoalkyl or hydroxyalkyl terminal groups.

Abstract: Alkoxysilane-terminated polymers prepared by reacting an isocyanatoalkoxysilane, preferably an isocyanatodialkyalkoxysilane, with an isocyanate-reactive prepolymer, can provide chain extension even when a monoalkoxy-functional silane, while retaining suitable reactivity profiles. The products are useful in sealants, caulks, coatings, and moldings.

Abstract: Primary aminoalkyl-terminated organopolysiloxanes are prepared simply and in high yield by reaction of hydroxyl-terminated organopolysiloxanes with an aminoalkyl-and alkoxy-functional silane. The primary aminoalkyl-terminated organopolysiloxanes are particularly useful as polymer intermediates in the preparation of polymers such as polyimides and polyureas.

Abstract: The invention relates to moisture cross-linking compositions containing (A) 100 parts per weight of a silane-terminated polydiorganosiloxane-urea/urethane copolymer of general formula (1), and (B) between 0.1 and 20 parts per weight of silane of general formula (3): &OHgr;-(CH2)e-Si(R2)3-f(CH3)f, in which R, X, A, Y, D, B, W, n, a, b, c, d, &OHgr;, R2, e and f are defined as per claim 1.

Abstract: Crosslinkable RTV-1 compositions with enhanced physical properties include an alkoxy-functional polydiorganosiloxane having alkoxy-functional silyalkylene groups linked to a polydiorganosiloxane via ureaalkylene groups, prepared by reacting an &agr;,&ohgr;-dihydroxyorganopolysiloxane with a silazane 1

Abstract: The invention relates to a method for producing isocyanato-organosilane of general formula (I) R2R3R4Si—R1—N═C═O. According to said method, gaseous carbamato-organosilane of general formula (II) R2R3R4Si—R1—NH—CO—OR (II), wherein R represents a monovalent C1-C10 alkyl radical, R1 represents a bivalent C1-C6 hydrocarbon radical and R2, R3 and R4 respectively represent a methyl, ethyl, n-propyl, i-propyl, methoxy, ethoxy, n-propoxy or i-propoxy radical, is heated in the presence of a heterogeneous catalyst.