摘要:
Undesired polymerization of (meth)acrylatoalkoxysilanes during their industrial preparation and handling is accomplished by avoiding contact with surfaces containing more than 1% by weight of iron.
摘要:
Particles obtained by silylating particles of a metal oxide or silicon oxide SOl with a silane containing at least one blocked isocyanate group are easily incorporated into coating materials such as clearcoats and topcoats, and imbue these coatings with high scratch resistance even at low filler content.
摘要:
Compositions which are crosslinkable contain an alkoxysilyl or hydroxyl-functional binder and functionalized particles prepared by reacting a filler having reactive groups on its surface with an alkoxysilane in which an alkoxysilyl group is linked to a heteroatom by an optionally substituted methylene spacer. The particle may react with the alkoxy group of the alkoxysilane or with a group containing the heteroatom of the alkoxysilane to functionalize the particles.
摘要:
The invention relates to coating formulations (B) which can be hardened to form coatings having a pencil hardness according to ISO 15184 of at least HB. Said formulations contain prepolymers (A) having alkoxysilane functions of general formula (6)-X—CH2—Si (OR) 3-xR′x, wherein R represents hydrogen, an alkyl, cycloalkyl or aryl radical respectively having between 1 and 6 atoms, and the carbon chain can be broken by non-adjacent oxygen, sulphur or NR″ groups; R′ represents an alkyl, cycloalkyl, aryl or arylalkyl radical respectively having between 1 and 12 C atoms, and the carbon chain can be broken by non-adjacent oxygen, sulphur or NR″ groups; R″ represents hydrogen, an alkyl, cycloalkyl, aryl, aminoalkyl, or aspartate acid ester radical; X represents oxygen, sulphur or a group of general formula (20)-O—CO—NR″—; and x represents 0 or 1.
摘要:
Organosilicon compounds bearing SiOC groups and having low residual silicon-bonded chlorine are prepared continuously by reacting a chlorosilane with alcohol and optionally water by contacting a gaseous phase containing alcohol with a liquid phase containing silane, organosilicon intermediates, organosilicon compounds containing SiOC groups and optional inert solvent in a reaction column in which the gas phase passes through the liquid phase in bubble form, or is provided with a vaporizer operating by a crossflow principle.
摘要:
Weather resistant and water repellent surfacing compositions especially useful in roofing applications contain an alkoxysilane-terminated polymer and a reactive silane plasticizer containing a C6-40 hydrocarbon group. The surfacing compositions are of low viscosity and may be used without non-reactive plasticizers or organic solvents.
摘要:
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.
摘要:
In the preparation of aminoorganylsilanes and cyclic aminosilanes by reaction of an organyl amine with a haloorganylsilane, the byproduct halide salt of the amine reactant is decomposed to amine by addition of a base whose halide salt forms a liquid phase at a temperature below 200° C., and the liquid base halide is separated from the reaction mixture.