摘要:
A laminated glass comprises: A) at least one layer consisting of inorganic or organic glass and B) at least one layer consisting of a polysiloxane-urea copolymer which is obtained by reacting a mixture of linear polysiloxanes of general formula Q-T-SiR2O—(SiR2O)n—SiR2-T-Q and branched polysiloxanes of general formula (Q-T-SiR2O1/2)a(Q-T-SiRO2/2)b(Q-T-SiO3/2)c(R3SiO2/2)d(R2SiO2/2)c(RSiO3/2)f(SiO4/2)g with polyfunctional isocyanates. The laminates exhibit excellent moisture resistance.
摘要:
Composition comprising (A) 50-99.5 wt %, based on the total weight, of A, B and C of a reaction resin or reaction resin mixture that is processed into thermosetting materials, said resin or resin mixture being liquid at temperatures in the range of 15 to 100° C. and having an average molecular weight of 200 to 500,000 and with a sufficient number of suitable reactive groups for a curing process and (B) 0.5-50 wt %, relative to the total weight of A, B and C of one or more dispersed polyorganosiloxanes that are contained in the reaction resin or reaction resin mixture homogeneously in finely distributed form as polyorganosiloxane droplets with a diameter of 0.001 to 4 μm, wherein the organopolysiloxane particle is a polymer of the general formula (R3SiO1/2)W(R2SiO2/2)X—(RSiO3/2)Y—(SiO4/2)Z, where w=0 to 20 Mol %, x=80 to 99.9 Mol %, y=0.5 to 10 Mol %, z=0 to 10 Mol %, (C) 0.1-50 wt %, based on the total weight of A, B and C of one or more silicone organo copolymers as dispersing agents that can be homogeneously dissolved or homogeneously emulsified in the reaction resin or reaction resin mixture.
摘要:
Alkyl silanes are prepared by silylating an unsaturated hydrocarbon with an Si—H functional silane employing an iridium chloride coordination compound as a catalyst and a polymeric polyene as a cocatalyst. Reaction bottoms can be worked up to provide an iridium-containing composition which remains catalytically active.
摘要:
Useful products are recovered from the bottoms of aminoalkylsilane production in high yield and purity by reaction with alcohol, increasing the economics of aminoalkylsilane synthesis.
摘要:
Phosphone ester modified organosilicon compounds are prepared by reacting phosphonic ester-functionalized alkoxysilane with a silanol-functional organosilicon compound. The product is produced in high yield and purity.
摘要:
A method for the solvent-free, continuous production of organopolysiloxane/polyurea/polyurethane block copolymers involves reacting amino-functional siloxanes with polyisocyanates and organic polyhydroxy compounds. The organopolysiloxane/polyurea/polyurethane block copolymers produced by means of the inventive method are useful for numerous purposes, for example as elastomers, caulks, sealants, and films.
摘要:
Curable, silane-terminated polydiorganosiloxane-urethane copolymers exhibit the beneficial properties of isocyanate-terminated polysiloxane-urethane copolymers without the detriments associated with free isocyanate groups.
摘要:
Composition comprising (A) 50-99.5 wt %, based on the total weight, of A, B and C of a reaction resin or reaction resin mixture that is processed into thermosetting materials, said resin or resin mixture being liquid at temperatures in the range of 15 to 100° C. and having an average molecular weight of 200 to 500,000 and with a sufficient number of suitable reactive groups for a curing process and (B) 0.5-50 wt %, relative to the total weight of A, B and C of one or more dispersed polyorganosiloxanes that are contained in the reaction resin or reaction resin mixture homogeneously in finely distributed form as polyorganosiloxane droplets with a diameter of 0.001 to 4 μm, wherein the organopolysiloxane particle is a polymer of the general formula (R3SiO1/2)w(R2SiO2/2)x- (RSiO3/2)y- (SiO4/2)z, where w=0 to 20 Mol %, x=80 to 99.9 Mol %, y=0.5 to 10 Mol %, z=0 to 10 Mol %, (C) 0.1-50 wt %, based on the total weight of A, B and C of one or more silicone organo copolymers as dispersing agents that can be homogeneously dissolved or homogeneously emulsified in the reaction resin or reaction resin mixture.
摘要:
The invention relates to cyclic silazanes of the formula II in which R is a divalent, Si—C and C—N-bound, optionally cyano- or halogen-substituted C3-C15-hydrocarbon radical, in which one or more, non-adjacent methylene units may be replaced by —O—, —CO—, —COO—, —OCO—, —OCOO—, —S— or —NRX— groups and in which one or more non-adjacent methine units may be replaced by —N═, —N═N— or —P═ groups, where at least 3 and at most 6 atoms are arranged between the silicon atom and the nitrogen atom of the ring, RX is hydrogen or an optionally halogen-substituted C1-C10-hydrocarbon radical, and R2 is a hydrogen atom or a monovalent, optionally cyano- or halogen-substituted, Si-C- bound C1-C20-hydrocarbon radical or C1-C20-hydrocarbonoxy radical, in each of which one or more non-adjacent methylene units may be replaced by —O—, —CO—, —COO—, —OCO—, —OCOO—, —S— or —NRX— groups and in which one or more non-adjacent methine units may be replaced by —N═, —N═N— or —P═ groups.
摘要:
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): Ω-(CH2)e—Si(R2)3-f(CH3)f, in which R, X, A, Y, D, B, W, n, a, b, c, d, Ω, R2, e and f are defined as per claim 1.