摘要:
Coating compositions based on water-redispersible powders comprising water-soluble polymer and organosilicon compounds, wherein the organosilicon compounds comprise at least one low molecular weight organosilicon compound having a viscosity of not more than 5,000 mm.sup.2 /s at 25.degree. C. and at least one high molecular weight organopolysiloxane resin which has a viscosity of at least 100,000 mm.sup.2 /s at 25.degree. C. or is solid at room temperature.
摘要:
Organopolysiloxane resin powders having a mean particle diameter (median value d.sub.50,3) of from 70 to 300 .mu.m and a proportion of resin particles having a diameter
摘要:
The invention relates to compounds of the formula[RSiO.sub.3/2 ].sub.z (I)in whichz is 6, 8 or 10;R represents the same or different radicals of the formulas--CH.sub.2 CH.sub.2 --X (II), --CH(CH.sub.3)--X (III) or --O--Si(R'.sub.2)--Y (IV) with the proviso that up to z-1 of the radicals can also be radicals of the formula --O--SiR'.sub.3, in which X represents a monovalent radical or one half of a divalent radical of the formulas ##STR1## R' represents the same or different C.sub.1 - to C.sub.6 -alkyl, C.sub.1 - to C.sub.6 -alkoxy or phenyl radicals;R" represents the same or different C.sub.1 - to C.sub.18 -alkyl radicals, which can be substituted by radicals of formulas (V) or (VI);R'" represents the same or different divalent C.sub.1 - to C.sub.18 -hydrocarbon radicals, preferably alkylene and/or phenylene radicals and/or radicals of the formula--(R'.sub.2 SiO).sub.n --;Z represents a halogen atom or an N-bonded amino radical, that is an NH.sub.2 radical, an N-piperidinyl, n-piperazinyl or N-morpholinyl radical or a C.sub.1 - to C.sub.6 -N-monoalkylamino or a C.sub.1 - to C.sub.6 -dialkylamino radical;Y represents a hydrogen atom, an optionally halogenated C.sub.2 - to C.sub.10 -hydrocarbon radical or a radical of the formulas (II) or (III); andn represents an integer having avalue of at least 1.
摘要:
The present invention relates to organopolysiloxane resin solutions which contain 1-alkenes and are free from aromatic hydrocarbons, processes for their preparation and their use in organopolysiloxane compositions from which it is possible to produce coatings which repel tacky substances.
摘要:
The invention relates to aliphatically unsaturated organosilicon compounds having 2 to 17 silicon atoms, to processes for their preparation and to their use in crosslinkable organopolysiloxane compositions, especially in compositions which can be crosslinked peroxidically or by hydrosilylation.
摘要:
The present invention relates to a process for preparing coating compositions which comprises condensing a mixture containing (A) at least one silicone resin containing Si-bonded alkoxy groups and, if desired, silanol groups and/or at least one silane and/or siloxane which contains Si-bonded alkoxy groups and, if desired, silanol groups to form a silicone resin, (B) a basic condensation catalyst in an amount sufficient to render this mixture basic, (C) optionally water and (D) optionally an organic solvent.The resultant coating compositions are preferably employed in the form of a solution, emulsion or dispersion.
摘要:
The invention relates to aliphatically unsaturated organosilicon compounds having 2 to 17 silicon atoms, to processes for their preparation and to their use in crosslinkable organopolysiloxane compositions, especially in compositions which can be crosslinked peroxidically or by hydrosilylation.
摘要:
Water-repellent plaster compositions comprising the constituents(A) 100 parts by weight of gypsum plaster,(B) from 0.05 to 50 parts by weight of oxide or hydroxide of alkali or alkaline earth metals or a mixture thereof, and(C) from 0.05 to 20 parts by weight of an organopolysiloxane which has hydroxyl and/or alkoxy groups bonded to silicon atoms.
摘要:
Alkoxysilyl-terminated prepolymers in which the alkoxysilyl group is linked to a tertiary nitrogen group through a Cl carbon spacer exhibit excellent moisture curing reactivity and yet are easily prepared. The tertiary nitrogen group-containing α-aminoalkoxysilyl group is introduced into the prepolymer by reacting a tertiary nitrogen group-containing α-aminoalkoxysilane with an isocyanate-terminated prepolymer or isocyanate-functional precursor thereof.
摘要:
A process for preparing organosilazane and ammonium chloride, by reaction of an organochlorosilane with ammonia in the presence of organosilazane as solvent, wherein ammonium chloride is removed from the resulting organosilazane and ammonium chloride-containing mixture, the improvement comprising adding an antiblocking agent to the mixture before removal, or to the ammonium chloride after its removal, such that a non-blocking, reusable ammonium chloride product is obtained.