Abstract: A method for producing crosslinkable compositions (M) by mixing (A) 100 parts by weight of compounds of the formula Y—[(CR12)b—SiRa(OR2)3-a]x (I) and (B) 0.1 to 75 parts by weight of at least one thixotropic agent. The at least one thixotropic agent is selected from fatty acid amides, polyamide waxes, polyamide wax derivatives, hydrogenated castor oil, hydrogenated castor oil derivatives, polyester amides, polyureas, oxidized polyethylenes and metal soaps and optionally further components. The period of time from the start of the mixing step of (A) and (B) to the end of storage of the crosslinkable composition (M) is at least 7 days and during this period all process steps are carried out at temperatures below 59° C.

Abstract: Alkoxysilyl-terminated polymers having from 5-60% of ?-silyl groups and also having non-?-silyl groups can be stabilized by conventional water scavengers to produce rapid-curing room temperature vulcanizable one component silicone composition which are storage stable.

Abstract: The invention provides a process for preparing a mixture (M) which comprises silane-terminated polymers (SP1) of the general formula (I) Y1—[O—C(?O)—NH—(CR12)b—SiRa(OR2)3-a]x??(I), optionally silane-terminated polymers (SP2) of the general formula (II) Y2—[O—C(?O)—NH—(CR12)b—SiRa(OR2)3-a]z??(II) and hydroxy-functional polymers (SP3) of the general formula (III) Y2—[O—C(?O)—NH—(CR12)b—SiRa(OR2)3-a]z-z1(OH)z1??(III) where Y1 and Y2 are polymer radicals and R, R1, R2, x, z, z1, a and b have the definitions indicated in claim 1, wherein, in a first process step, at least one polymer (HP1) of the general formula (IV) Y1—[OH]x??(IV) reacts with at least one isocyanate-functional silane (S) of the general formula (V) O?C?N—(CR12)b—SiRa(OR2)3-a??(V) to give silane-terminated polymers (SP1), and, in a second process step, the unreacted isocyanate groups of the isocyanate-functional silane (S) of the general formula (V) are reacted with at least one oligomer or polymer (HP2) of the ge

Abstract: A process for producing alkyl silicone resins (A) containing at least 80 wt % of units of the general formula (I), R1a(R2O)b(HO)dR3cSiO(4-a-b-c-d)/2 (I), is provided. Alkylalkoxysilane (A1) of the general formula (II), R1aR3cSi(OR2)(4-a-c) (II), is mixed in a first reaction step (R1), alternatively, with a pure acid (S) having pKa of not more than 5, with an at least 5 wt % aqueous solution of an acid (S) having a pKa of not more than 5 or with a halosilane compound (A2) of the general formula (III), R1aR3cSi(X)(4-a-c) (III). Subsequently, in at least one further reaction step, (R2) water is added.

Abstract: Silane-terminated polymers of the formula (I) Y—[Z—C(?O)—NR3—(CR12)b—SiRa(OR2)3-a]x??(I), are produced by reacting at least one hydroxy-functional polymer (a), comprising at least one polyether, polyester and/or polyacrylate unit, with at least one compound having at least one isocyanate group, in the presence of at least one bismuth-containing catalyst (K), with the proviso that the reaction mixture comprises 50 to 250 ppm water at the start of the reaction.

Abstract: Curable alkoxysilyl-terminated polymers may be used for architectural coatings, particularly flat roofs, if specific HALS UV absorbants are included in the coating formulation.

Abstract: A process for preparing silane-terminated polymers (SP) of the formula (I), Y—[O—C(?O)—NH—(CR12)b—SiRa(OR2)3-a]x??(I), includes in a 1st process step at least one polymer (OHP) of the formula (II), Y—[OH]x??(II), being reacted with at least one isocyanate-functional silane (IS) of the formula (III), O?C?N—(CR12)b—SiRa(OR2)3-a??(III), with the proviso that the isocyanate-functional silanes (IS) are used in an amount such that there are at least 1.05 isocyanate groups in the silanes (IS) to each hydroxyl group in the compounds (OHP). Subsequently, in a 2nd process step, the unreacted isocyanate groups of the silanes (IS) are reacted, in the reaction mixture obtained in the 1st process step, with at least one alcohol (A) of the formula (IV), R3OH??(IV) Subsequently, in a 3rd process step, the reaction mixture obtained in the 2nd process step is passed through an evaporation unit (VD).

Abstract: Metal catalysts employed in the preparation of organyloxysilyl-functional, moisture curable polymers, are deactivated by cheating with specific chelating agents. Compositions containing the polymers exhibit improved storage stability.

Abstract: A method for reducing or avoiding an alkali-aggregate reaction in a cured concrete. The method includes providing a curable concrete mixture which includes alkali-sensitive aggregates (A), at least one organosilicon compound (B) and/or at least one siloxane (B2). Mass hydrophobization of the curable concrete mixture is achieved by way of adding at least one organosilicon compound (B) to the curable concrete mixture prior to its curing thereby reducing or avoiding an alkali-aggregate reaction in the cured concrete.

Abstract: A multi-component crosslinkable composition includes at least one component (K1) and one component (K2). Component (K1) contains organosilicon compounds (A1) selected from compounds (A1a) of formula (Ia), the formula (Ia) being Y1—[B1—CR22—SiRa(OR1)3-a]x, and compounds (A1b) of formula (Ib), the formula (Ib) being Y2—[B2—(CR42)b—Si(OR3)3]y. Component (K2), based in each case on 100 parts by weight of compounds (A1) in component (K1), includes at least 0.05 parts by weight of water and 10 to 1000 parts by weight of a component (A2) selected from compounds (A2a) of formula (IIa), the formula (IIa) being Y3—B3—CR72—SiR5c(OR6)3-c, and compounds (A2b) of formula (IIb), the formula (IIb) being Y4—[B4—(CR102)e—SiR8d(OR9)3-d]z.

Abstract: Silane-terminated polymers of the formula (I) Y—[Z—C(?O)—NR3—(CR12)b—SiRa(OR2)3-a]x??(I), are produced by reacting at least one hydroxy-functional polymer (a), comprising at least one polyether, polyester and/or polyacrylate unit, with at least one compound having at least one isocyanate group, in the presence of at least one bismuth-containing catalyst (K), with the proviso that the reaction mixture comprises 50 to 250 ppm water at the start of the reaction.

Abstract: Crosslinkable compositions especially useful for coatings containing an alkoxysilyoxy-terminated polymer and a silicone resin.

Abstract: Alkylsilicone resins containing at least 20 mol percent of siloxy units bearing a >Cs alkyl group and having from 5-20 weight percent of alkoxy groups may be prepared directly by hydrolysis of chlorosilanes, and are highly effective as bulk hydrophobing agents in the preparation of fibrocement.

Abstract: Curable alkoxysilyl-terminated polymers may be used for architectural coatings, particularly flat roofs, if specific HALS UV absorbants are included in the coating formulation.

Abstract: The invention relates to cross-linkable compositions comprising (A) organosiloxanes consisting of units RcSiO4-c/2??(I) and R5(OR4)mSiO3-m/2??(II), (B) silanes R5Si(OR4)3??(II) and/or partial hydrolysates thereof in amounts of 5 to 20 parts by weight, based on 100 parts by weight of component (A), (C) organosiloxanes consisting of units R6a(R7O)bSiO(4-a-b)/2??(IV) in amounts of 1 to 30 parts by weight, (D) organosilicon compounds comprising units of the formula DfSi(OR9)eR8dO(4-d-e-f)/2??(V), in amounts of 0.1 to 2 parts by weight. The compositions are particularly useful as anti-graffiti coating.

Abstract: Moisture curing alkoxysilyl-functional polymer compositions containing a high phenyl-content silicone resin and carbon black exhibit high adhesion to substrates, high tensile strength, very high elongation, and high tear strength without becoming unduly hard.

Abstract: Metal catalysts employed in the preparation of organyloxysilyl-functional, moisture curable polymers, are deactivated by cheating with specific chelating agents. Compositions containing the polymers exhibit improved storage stability.

Abstract: Crosslinkable compositions suitable for use as adhesives or sealants contain: (A) 100 parts by weight of silane-crosslinking polymers (A1) of the formula R2—O-Z1-O—CO—NH—(CH2)—SiRa(OR1)3-a??(I) and/or polymers (A2) of the formula R4—O-Z2-O—CO—NH—(CH2)3—Si(OR3)3??(II), (B) 0 to 300 parts by weight of silane-crosslinking polymers having at least two end groups of the formula —SiR7c(OR8)3-c??(III), and also (C) 20 to 400 parts by weight of a tackifier resin.

Abstract: Crosslinkable compositions especially useful for coatings contain an alkoxysilyoxy-terminated polymer and a silicone resin.

Abstract: The invention relates to cross-linkable compositions comprising (A) organosiloxanes consisting of units RcSiO4-c/2??(I) and R5(OR4)mSiO3-m/2??(II), (B) silanes R5Si(OR4)3??(II) and/or partial hydrolysates thereof in amounts of 5 to 20 parts by weight, based on 100 parts by weight of component (A), (C) organosiloxanes consisting of units R6a(R7O)bSiO(4-a-b)/2??(IV) in amounts of 1 to 30 parts by weight, (D) organosilicon compounds comprising units of the formula DfSi(OR9)eR8dO(4-d-e-f)/2??(V), in amounts of 0.1 to 2 parts by weight. The compositions are particularly useful as anti-graffiti coating.