Abstract: The invention relates to a method for producing organopolysiloxane terminated with alkoxy groups, wherein A) organopolysiloxane terminated with HO is reacted with B) alkoxysilane having at least three alkoxy groups and/or whose partial hydrolysate is made to react in the presence of C) acid phosphoric acid ester of general formula (I): (HO)aOP(—O—[(CR12)b—O]c[(CR22)d]e—L—M)(3−a), wherein a=1 or 2; R1 and R2=a hydrogen, methyl or hydroxyl radical; b and d=2 or 3; c=integral values from 2 to 15; e=0 or 1; L=a radical from the group —O—, —COO—, —OOC—, —CONR3—, —NR4CO— and —CO—; R3 and R4=a hydrogen or a C1-C10-alkyl radical and M=a monovalent, optionally a hydroxyl, fluorine, chlorine, bromine, C1-C10-alkoxylalkyl or cyano group substituted C1- to C20-hydrocarbon radical, provided that the radicals R1 and R2 can only be at one give

Abstract: Stable RTV-1-alkoxy compositions contain a tin catalyst and surfactants (S) which contain divalent polyether units of the general formula (I) —O—[(CR&agr;R&bgr;)u—O]v—  (I) in which R&agr; and R&bgr; are hydrogen or a monovalent C1-C10-hydrocarbon radical optionally substituted by hydroxyl, fluorine, chlorine, bromine, C1-C10-alkoxyalkyl or cyano groups, u is from 1 to 6 and v is from 3 to 100. The compositions are stable despite the presence of the tin catalyst and alkoxy-functional organosilicon compounds.

Abstract: The present invention pertains to the preparation of organopolysiloxanes containing organyloxy groups by reacting organopolysiloxane(s) bearing terminal hydroxyl groups with an alkoxysilane having at least two alkoxy groups and a radical which contains at least one secondary or tertiary amino group bonded to silicon by a divalent C1-2 hydrocarbon radical, the reaction being catalyzed by an acidic ester of phosphoric acid having the formula (HO)aOP—(O—R7)3−a Where R7 is an oxyalkylated active hydrogen component, preferably an oxyalkylated fatty alcohol. RTV-1 compositions containing the reaction product exhibit extended storage life.

Abstract: Alkoxy RTV-1 compositions comprise the product of the reaction of (A) an HO-terminated organopolysiloxane, (B1) an alkoxysilane which has at least three alkoxy groups and/or its partial hydrolysates, and (B2) an alkoxysilane which has two alkoxy groups and/or its partial hydrolysates, in the presence of (C) an acid phosphoric ester of the general formula (I) (HO)aOP(—O—[(CR12)b—O]c[(CR22)d]e—L—M)(3−a)  (I), where a is 1 or 2, R1 and R2 are a hydrogen radical, methyl radical or hydroxyl radical, b and d are 2 or 3, c is an integer from 2 to 15, e is 0 or 1 L comprises a radical —O—, —COO—, —OOC—, —CONR3—, —NR4CO— or —CO—, R3 and R4 are a hydrogen radical or C1-C10-alkyl radical, and M is a monovalent, unsubstituted or hydroxyl-, fluorine-, chlorine-, bromine-, C1-C10-alkoxyalkyl- or cyano-substituted C1-C20-hydrocarbon radical, with the proviso that on any giv

Abstract: The invention relates to organopolysiloxane compounds which can be stored subject to the exclusion of moisture, can be cross-linked by cleaving of alcohols to form elastomers when moisture gains access at room temperature and are based on (A) polydiorganosiloxanes with organyloxy groups, optionally (B) organyloxy functional cross-linkers with at least three organyloxy groups, and optionally (C) condensation catalysts, characterised in that they contain at least one (D) compound selected from the compounds (D.sub.a) to (D.sub.f) given in claim 1.

Abstract: The compositions proposed contain, as their main constituents,(a) a diorganopolysiloxane with triorganosiloxy groups as terminal groups, the organic groups being hydrocarbon groups which may be halogenated,(b) the reaction product of a diacylated diorganotin compound with a disilaalkane containing, per molecule, at least two monovalent hydrocarbon groups which are bonded to silicon via oxygen and may optionally be substituted by an alkoxy group, or with an oligomer of such a disilaalkane,(c) an organosilicon compound containing, per molecule, at least one amino or amino group bonded to silicon via carbon,(d) optionally, a filler and(e) optionally, a disilaalkane and/or silane containing, per molecule, at least three monovalent hydrocarbon groups which are bonded to silicon via oxygen and may optionally be substituted by an alkoxy group, or an oligomer of such a disilaalkane and/or silane.

Abstract: Sealing compositions containing dispersions of polymers of ethylenically unsaturated monomers comprising(a) polymers of ethylenically unsaturated monomers,(b) 0.1 to 5% by weight of branched organopolysiloxanes, based on the total weight of the sealing compositions,(c) dispersing agent,(d) filler and(e) water.

Abstract: Organopolysiloxane compositions which crosslink at room temperature to form paintable elastomers containing (3) an organopolysiloxane having SiC-bonded radicals with a basic nitrogen and/or (4) a branched organopolysiloxane.

Abstract: Compositions which can be stored in the absence of moisture, but crosslink in the presence of moisture at room temperature to form elastomers comprising a diorganopolysiloxane having terminal condensable groups, a silicon compound having at least three hydrolyzable groups bonded directly to silicon per molecule, an average of at least one acyloxy group being present as a hydrolyzable group per silicon atom in the silicon compound, and an organosilicon compound having at least one vicinal epoxy group, in which at least part of the organosilicon compound containing at least one vicinal epoxy group is a cyclic diorganopolysiloxane.

Abstract: The invention relates to organopolysiloxane compositions which can be crosslinked to form elastomers with the elimination of alcohols and are stabilized by salts of the second main group or sub-group with branched-chain carboxylic acids having from 5 to 15 carbon atoms.

Abstract: Compositions which are stable when stored under anhydrous conditions, but which crosslink to form elastomers when exposed to moisture at room temperature are prepared by mixing (1) a diorganopolysiloxane having terminal condensable groups, with (2) a silicon compound containing at least three groups per molecule selected from amino groups which are bonded to silicon via nitrogen, oxime groups which are bonded to silicon via oxygen or mixtures thereof and (3) a product which is obtained from the reaction of (a) a silane containing as hydrolyzable groups at least two monovalent hydrocarbon radicals per molecule which are bonded to silicon via oxygen in which the monovalent hydrocarbon radicals may be interrupted by at least one ether-oxygen, or an oligomer thereof, with (b) a diorganotin diacylate, in which all the valences of the tin atom in the reaction product are saturated by SnC-bonded monovalent radicals or by oxygen atoms of the .tbd.SiOSn.tbd. group.

Abstract: Compositions which can be stored under anhydrous conditions but when exposed to moisture crosslink at room temperature to form elastomers, comprising a diorganopolysiloxane having terminal condensable groups, a silicon compound containing at least three hydrolyzable groups per molecule which are bonded to silicon, and an alkylenediamine in which at least one hydrogen atom that is bonded to a nitrogen atom of the alkylenediamine is substituted with a polyalkylene oxide.

Abstract: The invention relates to organopolysiloxane compositions which are stable when stored under anhydrous conditions, but when exposed to moisture cure to an elastomer containing (a) a diorganopolysiloxane having terminal condensable groups, (b) a silicon compound having 3 amino groups bonded to silicon via nitrogen and/or oxime groups bonded to silicon via oxygen per molecule and (c) a silicon compound having at least one thiol group selected from mercapto-functional silanes or siloxanes. The presence of the mercapto-functional silanes or siloxanes substantially retards the formation of skin but does not substantially extend the cure time of the organopolysiloxanes compositions. These compositions are useful in, for example, screen printing, where a long skin-over time is desired.

Abstract: Compositions which are stable when stored under anhydrous conditions, but when exposed to atmospheric moisture cross-link to form elastomers comprising (1) an organopolysiloxane having terminal condensable groups, (2) a silicon compound having at least 3 Si-bonded hydrolyzable groups per molecule and (3) from 30 to 100 percent by weight, based on the weight of the organopolysiloxane (1), of a powder obtained from the homopolymerization or copolymerization of an acrylonitrile in an aqueous medium.

Abstract: This invention relates to compositions which can be stored under anhydrous conditions, but when exposed to atmospheric moisture cure at room temperature to form elastomers. These compositions contain a diorganopolysiloxane having terminal condensable groups, a silicon compound having at least one nitrogen atom and at least three hydrolyzable groups per molecule, a reinforcing filler and a phosphoric acid ester. These compositions have improved stability and improved flow properties. Elastomers prepared from these compositions when compared with known compositions, have lower modulus values at 100 percent elongation.

Abstract: Organosilicon compounds having at least one hydrocarbon radical linked to at least 75 percent of the silicon atoms via an oxygen atom in which the hydrocarbon radical has at least one hydroxyl group and may be linked again to the same silicon atom or to another silicon atom via an oxygen atom are added to room temperature curable organopolysiloxane compositions to form compositions which are resistant to flow on vertical surfaces. When these compositions are exposed to atmospheric moisture at room temperature, they form elastomers having decreased Shore hardness and modulus on the surface in contact with the substrate as compared to the surface exposed to atmospheric moisture.