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: 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: 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 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: 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: A method for producing a silylated polyurethane that comprises the following steps: (1) reacting at least one polyether polyol having a number average molecular weight of at least 2,000 g/mol with at least one polyisocyanate in the presence of at least one solvent; (2) reacting the reaction product of step (1) with at least one silane of formula (I) A-R—SiXYZ (I), where A means —NH2 or —NHB, wherein B stands for a branched or linear alkyl radical with 1-12 C atoms, possibly having functional groups, a cyclic alkyl radical having 5-8 C atoms, or an aryl radical, R is a divalent hydrocarbon radical having 1-12 C atoms, and X, Y, Z are substituents on the Si atom and are independently of each other C1-C8 alkyl, C1-C8 alkoxy or C1-C8 acyloxy groups, wherein at least one of radicals X, Y, Z is a C1-C8 alkoxy or C1-C8 acyloxy group, in the presence of at least one solvent.

Abstract: In a curable composition that contains at least one polymer having at least one terminal group of the general formula (I) -An-R—SiXYZ??(I), at least one cyclic compound that contains at least one structural motif of formula (II) as a constituent of the ring structure; and at least one cyclohexanedicarboxylic acid dialkyl ester in which the alkyl residues of the ester groups each, mutually independently, contain 1 to 20 carbon atoms. The curable composition can be used as an adhesive, sealant, and/or coating material. A combination of a cyclohexanedicarboxylic acid dialkyl ester, in which the alkyl residues of the ester groups each, mutually independently, contain 1 to 20 carbon atoms and a cyclic compound that contains at least one structural motif of the general formula (II) as a constituent of the ring structure, as a plasticizer/curing catalyst system in curable compositions.

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

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: Isocyanate-functional silanes are prepared in high yield by pyrolysis of an O-carbamate prepared by reaction of a dialkylcarbonate with an aminoalkyl-functional silane in the presence of a basic catalyst, where the catalyst is neutralized by an acid which has a pKa of all protolysis stages of not more than 4. The neutralized or partially neutralized catalyst need not be removed prior to pyrolysis. The isocyanato-functional silanes exhibit higher storage stability as compared to those prepared from O-carbamates where catalyst neutralization is effected by weak acids.

Abstract: Multicomponent crosslinkable compositions based on organyloxysilane-terminated polymers free of toxicologically objectionable catalysts and isocyanates exhibiting good tensile shear strength are useful for adhesive bonding and sealing of substrates.

Abstract: Moisture-curing adhesives simultaneously having high tensile strength and elongation are prepared by admixing a silane-terminated polyurethane or polyether polymer having a defined and limited molecular weight, finely divided silica, and an organosilicon compound containing basic nitrogen.

Abstract: A composition containing an alkoxysilyl-functional polymer, a phenylsilicone resin, and a non-reactive plasticizer, when cured, exhibits very high elongation without loss of tensile strength. The compositions are particularly well suited for flexible adhesives.