摘要:
High-solids aqueous polymer dispersions, their preparation and use A description is given of an aqueous polymer dispersion derived from at least one ethylenically unsaturated monomer and with a solids content of at least 60% by weight, based on the polymer dispersion. The polymer dispersion comprises at least one salt of a phosphorus acid. The preparation takes place by free-radical emulsion polymerization of at least one ethylenically unsaturated monomer in aqueous phase in the presence of at least one emulsifier, at least one initiator and at least one salt of a phosphorus acid. With the process it is possible to prepare aqueous polymer dispersions having a high solids content in combination with a low viscosity, these polymer dispersions being suitable for formulating adhesives.
摘要:
Compounds of formula I where R1 is hydrogen, chlorine, fluorine or methyl, R2 and R3, which may be the same or different from each other, are hydrogen, halogen, cyano, (C1-C4)-alkyl, vinyl, ethynyl, (C1-C4)-alkoxy, (C1-C4)-alkoxy-(C1-C4)-alkyl, fluorovinyl or fluoroethyl, or R2 and R3 together with the linking carbon atoms form a benzo ring, and R4 is (C2-C4)-alkyl, (C2-C4)-alkenyl or (C3-C4)-alkinyl, each of which is substituted by at least two fluorine atoms and optionally substituted by C1-4-alkoxy, cyanomethoxy, (C3-C4)-alkenyloxy or (C3-C4)-alkinyloxy, are useful as pesticides, especially against insects, acarids and fungi. The invention includes a novel process for fluorinating certain pyrimidines.
摘要:
An optical component comprises an electromagnetic radiation-transparent polymeric medium having a second-order susceptibility of at least 10.sup.-9 electrostatic units where this polymeric medium comprises compounds having polar-aligned noncentrosymmetric molecular dipoles which have as structural element an electron acceptor which is bound to an electron donor via a conjugated .pi.-electron system, which makes possible an oscillation of the molecular dipole between a ground state having a first dipole moment and an electronically excited state having a second dipole moment different from the first, and the nonionic polymeric medium comprises an alternating arrangement of at least one Langmuir-Blodgett film each of at least two different nonionic polymers having nonlinear optical properties. Besides high mechanical and chemical stability the optical component of the invention has excellent nonlinear optical properties, for example frequency-doubling.
摘要:
Compositions containing selected polymer dispersions, colloidal silica, fillers and pigments are described.These can be formulated to give plasters and renders or paints which are distinguished by excellent abrasion resistance, little tendency to soiling, high water vapor permeability, good adhesion and good weathering stability. The compositions according to the invention can be processed to give plasters and renders or paints which have a nanostructured surface and which differ from conventionally produced surfaces.
摘要:
Multistage polymers predominantly stabilized by nonionic emulsifiers and derived from hard and soft monomer compositions containing vinyl esters, of which at least one monomer composition must contain an unsaturated compromisable organosilicon compound, are described.The plastic dispersions can be used as binders in emulsion paints and finishes and impart to these excellent scrub resistance in addition to good blocking resistance.
摘要:
A description is given of coating compositions comprising at least one pigment and/or filler and at least one aqueous dispersion of a selected emulsifier-stabilized vinyl ester copolymer which comprises as its stabilizer a mixture of at least one nonionic emulsifier and at least one salt of a bisester of a sulfonated dicarboxylic acid having 4 to 8 carbon atoms.The coating compositions formulated with these binders feature high scrub resistance.
摘要:
Disclosed are compounds of the formula I ##STR1## in which X is a phenyl, [1]naphthyl or [2]naphthyl radical each substituted by at least one tert.-butoxycarbonyloxy group and, if appropriate, having one or more than one additional substituent,R.sup.1 is a hydrogen atom, a (C.sub.1 -C.sub.6)-alkyl radical, a (C.sub.6 -C.sub.10)-aryl radical or one of the radicals X andR.sup.2 and R.sup.3 are identical or different and are a (C.sub.1 -C.sub.12)-alkyl radical in which, if appropriate, up to three methylene groups are replaced by bridge members having at least one hetero atom, such as --O--, --S--, --NR.sup.4 --, --CO--, --CO--O--, --CO--NH--, --O--CO--NH--, --NH--CO--NH--, --CO--NH--CO--, --SO.sub.2 --, --SO.sub.2 --O-- or --SO.sub.2 --NH--, a (C.sub.3 -C.sub.12)-alkenyl, (C.sub.3 -C.sub.12)-alkynyl, (C.sub.4 -C.sub.12)-cycloalkyl, (C.sub.4 -C.sub.12)-cycloalkenyl or (C.sub.8 -C.sub.16)-aralkyl radical in which, if appropriate, up to three methylene groups of the aliphatic moiety are replaced by bridge members of the abovementioned type and which can be substituted in the aromatic moiety by fluorine, chlorine or bromine atoms or by (C.sub.1 -C.sub.4)-alkyl, (C.sub.1 -C.sub.4)-alkoxy, nitro, cyano or tert.-butoxycarbonyloxy groups,R.sup.4 being an acyl radical, especially a (C.sub.1 -C.sub.6)-alkanoyl radical.
摘要:
Disclosed are compounds of the formula I ##STR1## in which X is a phenyl, [1]naphthyl or [2]naphthyl radical each substituted by at least one tert.-butoxycarbonyloxy group and, if appropriate, having one or more than one additional substituent,R.sup.1 is a hydrogen atom, a (C.sub.1 -C.sub.6)-alkyl radical, a (C.sub.6 -C.sub.10)-aryl radical or one of the radicals X andR.sup.2 is a (C.sub.4 -C.sub.12)-alkylene, (C.sub.4 -C.sub.12)-alkenylene or (C.sub.4 -C.sub.12)-alkynylene group in which, if appropriate, up to three methylene groups are replaced by bridge members having at least one hetero atom, such as --O--, --S--, --NR.sup.3 --, --CO--, --CO--O--, --CO--NH--, --O--CO--NH--, --NH--CO--NH--, --CO--NH--CO--, --SO.sub.2 --, --SO.sub.2 --O-- or --SO.sub.2 --NH--, a (C.sub.4 -C.sub.12)-cycloalkylene, (C.sub.4 -C.sub.12)-cycloalkenylene or (C.sub.8 -C.sub.16)-arylenebisalkyl radical in which, if appropriate, up to three methylene groups of the aliphatic moiety are replaced by bridge members of the above-mentioned type and which can be substituted in the aromatic moiety by fluorine, chlorine or bromine atoms or by (C.sub.1 -C.sub.4)-alkyl, (C.sub.1 -C.sub.4)-alkoxy, nitro, cyano or tert.-butoxycarbonyloxy groups,R.sup.3 being an acyl radical, especially a (C.sub.1 -C.sub.6)-alkanoyl radical, andn being an integer from 2 to 50, preferably from 5 to 20.
摘要:
A description is given of food coating compositions comprising a) a plastics dispersion or a mixture of plastics dispersions comprising at least one homo- or copolymer poly(meth)acrylate having at least 55% by weight (meth)acrylate monomer units and also 0.1 to 30% by weight of at least one protective colloid, and also b) aids and/or additives used for producing food coatings. The coatings are distinguished by sufficiently high water vapor transmission rates, low water absorption capacity and also low reemulsification capacity and have good mechanical properties in the moist state.
摘要:
A description is given of coating compositions comprising at least one strongly basic agent to set a pH of at least 10, at least one selected vinyl ester copolymer, if desired, pigment and/or filler, and, if desired, further additives customary per se.The coating compositions can be stored without use of additional preservatives and can be used to coat substrates of all kinds.