Abstract: Silicone foams having good foam structure and rapid cure are produced from foamable mixtures containing a physical blowing agent and an organically modified organopolysiloxane containing at least one urea or urethane group and an alkoxy(alkyl)siloxy unit.

Abstract: Siloxane copolymers are prepared stepwise by reacting an aminoalkyldiorganoalkoxysilane with a di- or polyisocyanate to form an alkoxysilyl-terminated urea compound, and the urea compound or its reaction product with water is subsequently reacted with a di- or polysilanol-functional polymer to form a copolymer.

Abstract: Crosslinkable polymers containing organopolysiloxane, polyurea, and/or polyurethane moieties further contain at least one photopolymerizable ethylenically unsaturated group and a photoinitiator which allows crosslinking upon exposure to radiation.

Abstract: Organopolysiloxaneurea polymers with good melt viscosity but which effectively crosslink in the presence of moisture contain alkylalkoxysilane or alkylaminoalkylalkoxysilane groups pendant to the polymer chain. The polymers are useful as non-creeping hot melt adhesives, and for other uses as well.

Abstract: Siloxane copolymers are prepared stepwise by reacting an aminoalkyldiorganoalkoxysilane with a di- or polyisocyanate to form an alkoxysilyl-terminated urea compound, and the urea compound or its reaction product with water is subsequently reacted with a di- or polysilanol-functional polymer to form a copolymer.

Abstract: Siloxane/urea copolymers contain pendant unsaturated groups crosslinkable by actinic radiation. The copolymers are suitable for use as non-creeping hotmelt adhesives and for other uses as well.

Abstract: The invention relates to moisture-crosslinkable organopolysiloxane-polyurea block copolymers, to a process for preparing the crosslinkable organopolysiloxane-polyurea block copolymers, and to their use; to crosslinkable compositions comprising the crosslinkable organopolysiloxane-polyurea block copolymers, to the preparation of the crosslinkable compositions, to their vulcanization, and to the use of the vulcanizates.

Abstract: Organopolysiloxaneurea polymers with good melt viscosity but which effectively crosslink in the presence of moisture contain alkylalkoxysilane or alkylaminoalkylalkoxysilane groups pendant to the polymer chain. The polymers are useful as non-creeping hot melt adhesives, and for other uses as well.

Abstract: Aqueous dispersions containing organopolysiloxane/polyurea copolymers prepared by reacting aminoalkyl-functional organopolysiloxanes with a diisocyanate in water in the presence of a protonating acid, and optionally one or more surfactants and/or protective colloids. The organopolysiloxane/polyurea polymers may be prepared without the presence of ionic groups if desired.

Abstract: The present invention relates to a process for preparing organyloxysilyl-terminated polymers which have increased stability toward atmospheric moisture, by reacting hydroxy-terminated organic polymers with isocyanato-functional silanes in the presence of at least one catalyst selected from the group consisting of bismuth and zinc compounds, and to crosslinkable compositions comprising such polymers.

Abstract: The invention relates to a process for catalyzed preparation of amino-functional siloxanes are prepared by a catalyzed process in which organosiloxanes of the general formula (SiO4/2)k(R1SiO3/2)m(R12SiO2/2)p(R13SiO1/2)q[O1/2H] ??(II) are reacted with cyclic silazanes of the general formula in the presence of Bronsted acids.

Abstract: Siloxane-urea copolymers are easily prepared by reacting a bis- or poly[azasilacyclopentyl]-terminated compound with a hydroxyl-functional compound followed by reaction with di- or polyisocyanate. When a bis[hydroxyl]-functional compound is used, the resulting polymer may be reacted with additional di- or polyisocyanate, optionally in the presence of additional isocyanate-reactive compounds such as chain extenders.

Abstract: Nitrogen-containing organopolysiloxanes which may also contain crosslinkable reactive groups are easily prepared by reaction of an alkoxy-functional oligosilane containing methylene linkages between silyl groups and nitrogen with organopolysiloxanes condensable therewith. The nitrogen may be quaternized if desired. The chain amino nitrogens can subsequently be quaternized if desired. Uses for the products include single component crosslinkable compositions.

Abstract: Photopolymerizable polysiloxaneurea copolymers contain at least one unsaturated moiety which crosslinks under the influence of radiation, in particular under the influence of ultraviolet light.

Abstract: Organopolysiloxane compositions obtainable by reaction of (a) essentially linear organopolysiloxanes which are terminated at both ends by Si-bonded hydroxy groups, (b) optionally, plasticizers, (c) at least one dialkylaminomethylalkyldialkoxysilane chain extender and/or partial hydrolysate thereof, (d) at least one deactivator, (e) optionally, one or more alkyltrialkoxysilanes and/or partial hydrolysates thereof, and (f) optionally, catalysts for accelerating the reaction of silane (e) with Si—OH groups, are useful in low-modulus compositions which can be crosslinked at room temperature, in particular, compositions which crosslink with elimination of alcohols.

Abstract: Crosslinkable compositions employing organosilicon compounds having at least two hydrolyzable groups, optionally a crosslinker, and optionally a compound containing basic nitrogen, include a crosslinking catalyst which is a reaction product of a phosphorus compound, a sulfur compound, and a tin compound. The compositions exhibit improved shelf life.

Abstract: One component vulcanizable silicone elastomer compositions contain at least one organosilicon compound bearing a plurality of hydrolyzable groups, optionally one or more crosslinkers bearing hydrolyzable groups, and a catalyst system comprising a tin compound bearing a sulphonic acid, sulfonic acid amide, or sulfonic acid ester group, and a basic nitrogen compound. Storage stable compositions capable of vulcanizing to clear or translucent moldings are produced.

Abstract: The invention relates to organopolysiloxanes containing at least one unit of formula (I) R2SiO2/2, at least one unit of formula (II) (R5O)R2SiO1/2, and at least one unit of formula (III) (R1R2N—CR102—)RSiO2/2, whereby the radicals and indices have the meanings as cited in Claim 1. The invention also relates to the production of these organopolysiloxanes and to their use in substances that can be cross-linked at room temperature, particularly in those that cross-link while alcohols are separated.

Abstract: Storage stability of one-component elastomers prepared from constituents having alkoxysilyl end groups is enhanced by employing bin compounds having a coordination number of 5 or 6 in which tin is coordinately bonded to a P?O group as at least one condensation catalyst.

Abstract: Aqueous dispersions containing organopolysiloxane/polyurea copolymers prepared by reacting aminoalkyl-functional organopolysiloxanes with a diisocyanate in water in the presence of a protonating acid, and optionally one or more surfactants and/or protective colloids. The organopolysiloxane/polyurea polymers may be prepared without the presence of ionic groups if desired.