Abstract:
The invention relates to a method for radical polymerisation in the presence of a chain transfer agent. After a radical hydrogen abstraction, forming an aromatic system, said agent cleaves off a leaving group, which starts a new radical chain.
Abstract:
The invention relates to a method for producing polymer-phyllosilicate-nanocomposite-foam materials, by mixing cationically stabilised polymer-lattices with aqueous suspensions of anionic phyllosilicates, isolating and drying the obtained nanocomposites, impregnating the dried nanocomposites and expanding the impregnated nanocomposites. The invention also relates to a polymer-phyllosilicate-nanocomposite-foam material which is produced according to said method, a polymer-phyllosilicate-nanocomposite-foam material which contains a polymer and which can be produced by free radical polymerisation of vinyl monomers and phyllosilicate selected from the group consisting of smectites, vermiculites, micas and mixtures thereof, to a method for producing polymer-phyllosilicate-nanocomposites, in addition to polymer-hyllosilicate-nanocomposites containing one polymer and phyllosilicates selected from the group consisting of smectites, vermiculites, mica and mixtures thereof.
Abstract:
Preparation of an aqueous polymer dispersion comprises radically initiated polymerization of an ethylenically unsaturated monomer in the presence of dispersing additives, optionally a water soluble organic solvent in an aqueous medium, where at least a partial quantity of ethylenic unsaturated monomer and an aqueous soluble organic solvent exists with an average droplet diameter of = 1000 nm (mini-emulsion). Preparation of an aqueous polymer dispersion comprises radically initiated polymerization of an ethylenically unsaturated monomer in the presence of dispersing additives, optionally a water soluble organic solvent in an aqueous medium, where at least a partial quantity of ethylenically unsaturated monomer and an aqueous soluble organic solvent exists with an average droplet diameter of = 1000 nm (mini-emulsion), where the mini-emulsion is prepared by a raw emulsion with an average diameter of >= 2 mu m, containing at least partial quantity of water, dispersing additives, ethylenically unsaturated monomer, optionally a water soluble organic solvent, and passed through a micro-porous membrane with an average pore diameter of = 1000 nm.
Abstract:
Dispersión acuosa que contiene al menos una cera de copolímero de etileno, que contiene un 60 a un 99, 5 % en peso de etileno, y un 0, 5 a un 40 % en peso de al menos un ácido carboxílico con insaturación etilénica, así como al menos una substancia orgánica hidrófoba de bajo peso molecular, presentando la substancia hidrófoba de bajo peso molecular una solubilidad en agua de menos de 0, 5 g/l a
Abstract:
Aqueous dispersion of hydrophobic, low-mol. wt. organic substances (A), contains ethylene copolymer wax(es) (B) comprising 60-99.5 wt% ethylene and 0.5-40 wt% unsaturated carboxylic acid units. Independent claims are also included for (1) a method for the production of such dispersions by mixing (A) with (B) and dispersing the mixture in water (2) paper coating materials containing such dispersions (3) paper containing oil-soluble fluorescent dyes (4) paper treated with the above coating materials.
Abstract:
Preparation of an aqueous polymer dispersion comprises radically initiated polymerization of an ethylenically unsaturated monomer in the presence of dispersing additives, optionally a water soluble organic solvent in an aqueous medium, where at least a partial quantity of ethylenic unsaturated monomer and an aqueous soluble organic solvent exists with an average droplet diameter of = 1000 nm (mini-emulsion). Preparation of an aqueous polymer dispersion comprises radically initiated polymerization of an ethylenically unsaturated monomer in the presence of dispersing additives, optionally a water soluble organic solvent in an aqueous medium, where at least a partial quantity of ethylenically unsaturated monomer and an aqueous soluble organic solvent exists with an average droplet diameter of = 1000 nm (mini-emulsion), where the mini-emulsion is prepared by a raw emulsion with an average diameter of >= 2 mu m, containing at least partial quantity of water, dispersing additives, ethylenically unsaturated monomer, optionally a water soluble organic solvent, and passed through a micro-porous membrane with an average pore diameter of = 1000 nm.
Abstract:
A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M containing from 40 to 80% by weight of styrene as monomer M1, from 20 to 60% by weight of butadiene as monomer M2, and from 0 to 40% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers M3 other than styrene and butadiene by a monomer feed technique in the presence of from 0.05 to 0.5% by weight, based on 100% by weight of monomers, of at least one hydrocarbon HC having 6 to 20 carbon atoms, which is selected from compounds which on abstraction of a hydrogen atom form a pentadienyl radical or a 1-phenylallyl radical and from alpha-methylstyrene dimer comprises including at least 30% of the hydrocarbon HC in the initial charge to the polymerization vessel and supplying the remainder of the hydrocarbon HC to the polymerization reaction in the course of that reaction.
Abstract:
Aqueous dispersion of hydrophobic, low-mol. wt. organic substances (A), contains ethylene copolymer wax(es) (B) comprising 60-99.5 wt% ethylene and 0.5-40 wt% unsaturated carboxylic acid units. Independent claims are also included for (1) a method for the production of such dispersions by mixing (A) with (B) and dispersing the mixture in water (2) paper coating materials containing such dispersions (3) paper containing oil-soluble fluorescent dyes (4) paper treated with the above coating materials.