摘要:
Mixtures of fluoropolymer dispersion, wherein: a) a dispersion is formed by TFE (co)polymers with average particle sizes in the range 180–400 nm; b) another dispersion selected from: 1) (co)polymer dispersion of TFE; 2) thermoplastic copolymers of TFE; the average particle sizes of dispersion b) range from 20 to 60 nm; the ratio between the particle sizes of dispersion b) compared with those of dispersion a) is lower than 0.3.
摘要:
Mixtures of fluoropolymer dispersion, wherein: a) a dispersion is formed by TFE (co)polymers with average particle sizes in the range 180-400 nm; b) another dispersion selected from: 1) (co)polymer dispersion of TFE; 2) thermoplastic copolymers of TFE; the average particle sizes of dispersion b) range from 20 to 60 nm; the ratio between the particle sizes of dispersion b) compared with those of dispersion a) is lower than 0.3.
摘要:
Mixtures of fluoropolymer dispersions comprising: a) one or more dispersions constituted by TFE homopolymers or by its copolymers with particle average sizes ranging from 180 to 400 nm; b) one or more TFE copolymer dispersions with one or more monomers containing at least one ethylene unsaturation, the comonomer amount being such that the dispersion contains a number of fibrils lower than 10% of the total number of particles; said fibrils being polymer particles having a length/diameter (L/D) ratio higher than 5; the dispersion particle average sizes are smaller of about 90 nm; the component b) contains a comonomer amount such that the resulting polymer is not elastomeric and furthermore it shows composition and viscosity characteristics of the melt such as not to be thermoprocessable.
摘要:
Protecting marble, stone, tiles, cement and analogous materials, utilized in the building industry, from the action of atmospheric agents and pollutants, by applying to the surface of the material an emulsion of perfluoropolyethers, optionally having at one end or at both ends or in the chain functional groups capable of acting as anchoring agents to the substrate.
摘要:
Protecting marble, stone, tiles, cement, and analogous materials utilized in the building industry, from the action of atmospheric agents and pollutants, by applying onto the surface thereof a microemulsion of perfluoropolyethers, optionally provided at one end or at both ends or in the chain with functional groups capable of acting as anchoring agents to the substrate.
摘要:
Process for the production of a composite material based on a polymer matrix comprising homogeneously dispersed therein an organic and/or inorganic filler, said process consisting in mixing together the aqueous dispersions of the single components, in which the dispersed particles of the dispersion have a surface charge of the same sign and "zeta potential" between 10 and 100 mV (in absolute value) and wherein the ratio (in absolute value) between the "zeta potentials" of the particles of each dispersion is between 0.2 and 5.
摘要:
Process for the production of a composite material based on a polymer matrix comprising homogeneously dispersed therein an organic and/or inorganic filler, said process consisting in mixing together the aqueous dispersions of the single components, in which the dispersed particles of the dispersion have a surface charge of the same sign and a "zeta potential" between 10 and 100mV (in absolute value) and wherein the ratio (in absolute value) between the "zeta potentials" of the particles of each dispersion is between 0.2 and 5.
摘要:
Perfluoropolyether microemulsions of the oil-in-water or water-in-oil type, consisting of perfluoropolyethers exhibiting an average molecular weight from 1,500 to 10,000, the end groups of which being at least partially of the functionalized type, optionally containing peroxide bridges in the chain and consisting of mixtures of products having different molecular weights, of a perfluorinated surfactant and/or a co-surfactant of the alkanol type having 1 to 12 C, and of an aqueous liquid optionally comprising an electrolyte.
摘要:
Protecting marble, stone, tiles, cement, and similar materials utilized in the building industry from the action of atmospheric agents and pollutants, which comprises applying a perfluoropolyether having perfluoroalkyl end groups onto the surface of the article, said perfluoropolyether being in the form of an aqueous microemulsion.
摘要:
Fluoropolymer aqueous dispersions having particles with average diameters from 150 to 400 nm, comprising bifunctional fluorinated surfactants having formula: A-Rf—B (I) wherein: A and B, equal to or different from each other, are: —(O)pCFX—COOM; M=NH4, alkaline metal, H; X=F, CF3; p is an integer equal to 0 or 1; Rf is a linear or branched perfluoroalkyl chain, or a (per)fluoropolyether chain such that the number average molecular weight of (I) is in the range 300-1,800.
摘要翻译:具有平均直径为150-400nm的颗粒的含氟聚合物水性分散体包括具有下式的双功能氟化表面活性剂:其中:A和B彼此相同或不同,是: - (O)pCFX-COOM; M = NH 4,碱 金属,H; X = F,CF 3; p是等于0或1的整数; Rf是直链或支链全氟烷基链或(全)氟聚醚链,使得(I)的数均分子量在 范围300-1,800。