摘要:
The invention relates to the polyoxyalkylene-polysiloxane block polymers of general formula (I) C-B-(AB)a-C1 (I), wherein A=a polyoxyalkylene block of the general formula —(CnH2nO)b—, B=a polysiloxane block of the general formula —(SiR2—O)c—, C, C1=the same or different alkoxypolyoxyalkylene groups of the general formula Z-O—[CH2—CH(R1)O]d—, R=the same or different C1-4 alkyl groups or phenyl groups, with the proviso that at least 90% of the groups R are methyl groups, R1=the same or different hydrogen, C1-12alkyl groups or phenyl groups, Z=an alkyl, alkylene, aryl or alkylaryl group, a=1 to 20, preferably 2 to 10, b=an average value of 10 to 130, preferably 20 to 100, c=3 to 100, preferably 10 to 80, d=independently is in the range of C/C1 values of 2 to 20, preferably 2 to 12, with the proviso that the average value is in the range of 2 to
摘要:
The invention relates to the use of water-insoluble poly(oxy-1,4-butanediyl)-containing polyoxyalkylene-polysiloxane block copolymers of the general average formula wherein the variables are described herein as defoaming agents for aqueous media. This invention also provides for defoaming compositions comprising said water-insoluble poly(oxy-1,4-butanediyl)-containing polyoxyalkylene-polysiloxane block copolymers.
摘要:
A defoamer emulsion, based on organofunctionally modified polysiloxanes, is obtained by mixing one or several more closely defined organofunctionally modified siloxanes and, optionally, finely divided silica, and emulsifying the mixture by means of a low-shear stirrer with water which contains a hydrophilic, organofunctionally modified polysiloxane.
摘要:
The invention relates to hydrocarbon-free aqueous creams of organosilicon compounds, their preparation and their use. The hydrocarbon-free water-in-oil creams of organosilicon compounds comprise the components: (A) one or more C1-C20-alkyl-C1-C6-alkoxysilanes (A1), alkoxy-containing organopolysiloxanes (A2) and/or organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least 0.01, (B) one or more emulsifiers and (C) water.
摘要:
The invention relates to the polyoxyalkylene-polysiloxane block polymers of general formula (I) C—B—(AB)a—C1 (I), wherein A=a polyoxyalkylene block of the general formula —(CnH2nO)b—, B=a polysiloxane block of the general formula —(SiR2—O)c—, C, C1=the same or different alkoxypolyoxyalkylene groups of the general formula Z—O—[CH2—CH(R1)O]d—, R=the same or different C1-4 alkyl groups or phenyl groups, with the proviso that at least 90% of the groups R are methyl groups, R1=the same or different hydrogen, C1-12 alkyl groups or phenyl groups, Z=an alkyl, alkylene, aryl or alkylaryl group, a=1 to 20, preferably 2 to 10, b=an average value of 10 to 130, preferably 20 to 100, c=3 to 100, preferably 10 to 80, d=independently is in the range of C/C1 values of 2 to 20, preferably 2 to 12, with the proviso that the average value is in the range of 2 to
摘要:
The invention relates to the use of water-insoluble polyoxyalkylene-polysiloxane block copolymers of the general average formula wherein the variables and indices are described herein as defoaming agents for aqueous media. This invention also provides for defoaming compositions comprising said water-insoluble polyoxyalkylene-polysiloxane block copolymers as well as coating materials, printing inks and cooling lubricants containing the inventive defoaming compositions.
摘要:
The invention relates to the use of a water-insoluble polyoxyarylene-polysiloxane block copolymers of the general average formula wherein the variables and indices are described herein as defoaming agents for aqueous media. This invention also provides for defoaming compositions comprising said water-insoluble block copolymers.
摘要:
The invention relates to compound antifoams comprising alkoxylated partial esters--using from 3 to 60 mol of propylene oxide with or without from 1 to 10 mol of styrene oxide and/or from 1 to 10 mol of butylene oxide--of oligoglycerols, obtainable by condensation of 2 to 20 glycerol molecules, with C.sub.8 to C.sub.22 fatty acids and inorganic or organic solids for defoaming polymer dispersions and aqueous coating systems.
摘要:
A composition is disclosed which is useful for the water-repellent impregnation of porous mineral building materials. The composition is based on organosilicon compounds which contain alkoxy groups and comprises an emulsion which contains 2.5 to 25% by weight of an alkoxysilane of the formulaR.sup.1 -Si(OR.sup.2).sub.3whereinR.sup.1 is an alkyl group with 3 to 12 carbon atoms andR.sup.2 is a methyl or ethyl group, 2 to 20% by weight of an alkoxysiloxane of the formula ##STR1## wherein R.sup.3 is an alkyl group with 1 to 6 carbon atomsa is 0.8 to 1.2 andb is 0.2 to 1.2,0.01 to 5% by weight of an emulsifier, 0.01 to 0.1% by weight of fillers with an effective surface area of at least 40 m.sup.2 /g and 49.9 to 95.48% by weight of water. The composition has a long shelf life and, due to its high penetration, a high water-repellent effect on the surface, as well as deep within, all mineral building materials.