摘要:
The invention relates to a method for producing polymer blends, which are suited for use as filter aids, from polystyrene and cross-linked water-insoluble polyvinyl pyrrolidones by processing both components in an extruder. The invention is characterized in that polystyrene is melted in an extruder, is then mixed with the polyvinyl pyrrolidone, and water is added to the mixture of the components having 0.1 to 10 % by weight with regard to the total amount of polystyrene and popcorn polymer, whereupon the mixture is extruded and comminuted.
摘要:
The invention relates to a method for removing styrene residual monomers from polystyrene and from blends containing water-insoluble cross-linked polyvinyl pyrrolidone by treating with water. The invention is characterized in that the treatment is carried out on a particle-shaped solid blend.
摘要:
The invention relates to polymer products that can be obtained by mixing (A) polymers, obtained by the radical polymerisation of (A-1) ethylenically unsaturated monomers in the presence of (A-2) unsaturated polyalkylene glycols, with (B) silicones, at a temperature greater than or equal to 30 °C. The invention also relates to a method for producing said polymer products, in addition to their use in cosmetic preparations, in particular haircare preparations.
摘要:
The invention relates to an active or effective substance composition containing at least one active or effective substance that is difficult to dissolve in water and at least one hyperbranched polymer.
摘要:
The invention relates to aqueous preparations which comprise at least one water-soluble or water-dispersible copolymer having cationogen groups, which contains, polymerized into it, at least one monomer having at least one protonizable nitrogen atom and at least one additional monomer that can be copolymerized therewith. The preparations also comprise at least one cosmetically acceptable carrier and have a pH in the range of from pH 4 to pH 6.
摘要:
Disclosed is a method for producing a 2,2'-dihydroxybiphenyl by oxidatively coupling two phenol molecules comprising a hydrogen atom in an ortho position with the aid of a peroxide at 0 °C to 100 °C in the presence of water. The inventive method is characterized in that the production is done in the presence of a polymer that is insoluble in water and contains a) 0 to less than 100 wt. % of a vinyl heterocycle, b) 0 to 10 wt. % of a bifunctional crosslinking component, c) 0 to less than 100 wt. % of styrol or a monounsaturated styrol derivative or the mixtures thereof, d) 0 to 100 wt. % of an N-vinylamide of an aliphatic carboxylic acid or the monomers obtained by hydrolyzing said amide group, and e) 0 to 100 wt. % of a propenoic acid or the esters, amides, or salts thereof or the monomers obtained by hydrolyzing said amide group or ester group, provided that the moiety of compound d), e), or d) and e) amounts to more than 0 wt. %.
摘要:
The invention relates to the use of copolymers, obtained by polymerisation of a) at least one compound of formula (I) (monomer A) where R1 and R2 independently = H, or CH3, R3 = C6-C10 aryl or C7-C12 aralkyl, with possibly one or more same or different C1-C9 alkyl and/or C1-C5 alkoxy substituents and n = a whole number from 0 to 100, b) at least one compound selected from the group of N-vinylamides, N-vinyllactams, N-vinylimines and N-vinylamines with 2 to 15 carbon atoms (monomer B), c) optionally one or more different difunctional curing components d) optionally, one or more different regulators and e) optionally, one or more further copolymerising components (monomer C), as solubilising agents.
摘要:
The invention relates to the use of ether group-containing polymers as solubilizers, especially in cosmetics, drugs, food items, food supplements and feed stuff, ideally in the production of plant protectives. The inventive polymers are obtained by copolymerization of (A) optionally at least one ethylenically unsaturated monocarboxylic or dicarboxylic acid and/or at least one anhydride derived from a monocarboxylic or dicarboxylic acid, (B) at least one hydrophobic monomer which has aromatic functions or aliphatic functions or aromatic and aliphatic functions, (C) at least one allyl alcohol alkoxylate, (D) optionally other monoethylenically unsaturated monomers.