摘要:
The present invention relates to a core-shell particle which has a core, a first shell and, where appropriate, a second shell, where: i) the core encompasses, based on its total weight, at least 75.0% by weight of (meth)acrylate repeat units; ii) the first shell has a glass transition temperature below 30° C.; iii) the second shell present where appropriate encompassed, based on its total weight, at lest 75.0% by weight of (meth)acrylate repeat units; iv) the first shell encompasses, based on its total weight, the following constituents; E) from 92.0 to 98.0% by weight of (meth)acrylate repeat units and F) from 2.0 to 8.0% by weight of styrenic repeat units of the general formula (I) where the radicals R1 to R6 are defined according to the Description and the percentages by weight of E) and F) give a total of 100.0% by weight, v) the radius of the core-shell particle inclusive of any second shell present, measured by the Coulter method, is in the range from above 160.0 to 240.0 nm. The present invention further relates to a process for preparing core-shell particles, to a moulding composition comprising core-shell particles, and to the use thereof.
摘要:
The present invention relates to a process for preparing an aqueous dispersion, by a) forming an initial charge from water and emulsifier, b) adding from 25.0 to 45.0 parts by weight of a first composition comprising A) from 50.0 to 99.9 parts by weight of alkyl methacrylates, B) from 0.0 to 40.0 parts by weight of alkyl acrylates, C) from 0.1 to 10.0 parts by weight of crosslinking monomers and D) from 0.0 to 8.0 parts by weight of styrenic monomers and polymerizing, c) adding from 35.0 to 55.0 parts by weight of a second composition comprising E) from 80.0 to 100.0 parts by weight of (meth) acrylates F) from 0.05 to 10.0 parts by weight of crosslinking monomers and G) from 0.0 to 20.0 parts by weight of styrenic monomers, and polymerizing, d) adding from 10.0 to 30.0 parts by weight of a third composition comprising H) from 50.0 to 100.0 parts by weight of alkyl methacrylates, I) from 0.0 to 40.0 parts by weight of alkyl acrylates and J) from 0.0 to 10.0 parts by weight of styrenic monomers and polymerizing. Features of the process are that e) each polymerization is carried out at a temperature in the range from >60 to
摘要:
The invention relates to a macroporous plastics bead material with an average particle diameter from 10 to 1000 μm, containing a copolymer of a) 5-60 wt. % vinylically polymerizable monomers with a water solubility of at least 1% at 20° C., b) 1-40 wt. % vinylically polymerizable monomers with an additional functional group, which can enter into covalent bonds with the nucleophilic groups of the ligands in a polymer-like reaction, c) 10-40 wt. % hydrophilic, crosslinking radical-polymerizable monomers with two or more ethylenically unsaturated polymerizable groups and d) 10-60 wt. % vinylically polymerizable monomers with a water solubility of at most 1% at 20° C. are contained, as a rule with the monomers a) to d) adding up to 100%.
摘要:
The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 &mgr;m, which includes: contacting: at least one polymerizable mix which includes at least 50% by weight of at least one (meth)acrylate monomer, at least one aluminum compound, and an aqueous phase, to prepare a mixture; dispersing the mixture at a shear rate≧103 s−1 to form a dispersion, wherein the dispersion is stabilized by the aluminum compound; and polymerizing to produce bead polymers having an average particle size of 1 to 40 &mgr;m.
摘要翻译:本发明提供了一种制备平均粒径为1至40μm的珠粒聚合物的方法,其包括:将至少一种包含至少50重量%的至少一种(甲基)丙烯酸酯单体的可聚合混合物在 至少一种铝化合物和水相,以制备混合物;将混合物以剪切速率> 10 3 s -1分散以形成分散体,其中分散体由铝化合物稳定; 并且聚合以制备平均粒径为1至40μm的珠粒聚合物。
摘要:
The invention relates to a connection between a foundation pile of a construction, in particular of an onshore or offshore construction, for example an onshore or offshore wind energy plant, having an in particular tubular transition piece, wherein the foundation pile and the transition piece are fitted one over the other or plugged one into the other with an intermediate space in between, and the intermediate space is at least partially filled with a mortar or concrete which has high strength after hardening, and to a method for producing same.
摘要:
A reactive mixture for coating moldings by reaction injection molding includes at least 40% by weight of (meth)acrylates having at least two double bonds. The reactive mixture also includes at least one photoinitiator and at least one thermal initiator. Furthermore, a coated molding includes a molding obtainable by injection molding processes. The molding includes polymethyl methacrylate, polymethylmethacrylimide, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, polymethyl methacrylate copolymer, or a combination thereof. A coating is obtainable by polymerization of (meth)acrylates having at least two double bonds, the coating having an adhesive strength rating of not more than 1 according to the cross hatch test and a decrease in gloss at 20° after a scratch resistance test according to ASTM 1044 (12/05) (applied weight 500 g, number of cycles=100) of not more than 10%.
摘要:
The present invention relates to a plastics molding composition encompassing at least one poly(meth)acrylate A) and at least one impact-modified poly(meth)acrylate B), wherein the die swell of the plastics molding composition is at least 15%, measured at 5 MPa and 2200C to DIN 54811 (1984), and the melt flow rate of the poly(meth)acrylate A) is at least 10 ml per 10 minutes, measured to ISO 1133 at 2300C with a load of 3.8 kg. The present invention also describes moldings which encompass the plastics molding composition described above, and processes for the production of the said moldings.
摘要:
The invention describes transparent plastics mixtures having low-temperature impact resistance composed of a thermoplastic polyurethane (TPU) and of an impact-modified poly(meth)acrylate (PMMA).
摘要:
The invention relates to an injection molding method for the production of a complex, high optical quality light-diffusing molded item. The molding material used comprises a matrix made of polymethyl(meth)acrylate and spherical plastic particles whose particle size ranges from 1-24 μm and the concentration thereof ranges from 0.05-30 wt.-% in relation to the weight of the polymethyl(meth)acrylate. The spherical particles exhibit a refractive index differential in relation to the polymethyl(meth)acrylate matrix of 0.01 0.2.
摘要:
Provided is a molding composition comprising, based on the total weight of the composition, (A) 50.0% by weight to 99.5% by weight of at least one (co)polymer which is a homopolymer or copolymer of at least 80% by weight of methyl methacrylate, (B) 0.5% by weight to 50.0% by weight of at least one copolymer obtained by polymerization of a monomer, and (C) at least one low molecular weight (meth)acrylate (co)polymer having a solution viscosity in chloroform at 25° C. (ISO 1628—part 6) of less than or equal to 55 ml/g.