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Novel crystalline foam material Invention relates to obtaining crystalline foam material and to crystalline foam material itself. Crystalline foam material is obtained in several stages: creation of first, crystalline arrangement of gas bubbles in composition to be hardened and then, realisation of said composition hardening. Liquid composition, capable of hardening and capable of forming a set of one or several groups, selected from urethane, isocyanurate and oxazolidone groups, is obtained. Crystalline arrangement of gas bubbles in composition to be solidified is obtained due to precipitation of monodisperse gas bubbles into said liquid composition to be solidified. Said composition is solidified. Foam material can be used, for instance, in fields of application of heat insulation, floatability, in construction, in packing, in soles of shoes, furniture, etc. |
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Method of producing rigid foamed polyisocyanurates using polyols of natural oils Method of producing a rigid foamed polyisocyanurate involves reaction at isocyanate index from about 175 to about 400 of polyisocyanate with at least one polyol of natural oil containing at least about 35 wt % with respect to the weight of polyl natural oil, having hydroxyl number from about 175 to about 375 and hydroxyl functionality from about 2.0 to about 2.8, in the presence of a foaming agent and optionally in the presence of one or more surfactants, flame-retardants, pigments, catalysts and fillers, in which the obtained foamed plastic has content of materials based on renewable biological material of at least 8 wt %. |
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Method of producing foam plastic Invention relates to the technology of producing foam plastic based on urea formaldehyde resin and can be used for heat shielding and sound insulation of garret floors, roofs and walls in building. The method includes a step of foaming aqueous solution of urea formaldehyde resin in the presence of a surfactant, subsequent addition into the foamed resin solution of filler - gypsum and an acidic curing agent, mixing the mixture to a homogeneous mass and subsequent solidification of the mixture. Before adding to the foamed resin solution, the gypsum is mixed with aqueous solution of urea formaldehyde resin in ratio of 0.5-1.0:1.0. |
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Overall, the invention relates to production of foamed thermoplastic from an aqueous dispersion for use in absorbent materials. The method involves adding at least one foam-stabilising surfactant to an aqueous dispersion which contains a thermoplastic resin, water and a stabilising agent for dispersion systems to form a mixture. Fibre is then added to the mixture which is then foamed. Further, at least a portion of water is removed from the foam to obtain foamed material with a non-cellular fibrillated morphology. The foamed material with average density between approximately 0.02 g/cm3 and approximately 0.07 g/cm3 may be used in absorbent articles. |
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Enhanced plastification compositions Invention relates to plasticised polyvinyl chloride compositions containing plasticisers, particularly polyvinyl chloride plastisols, as well as use of C9-C11 alkylbenzoate as a plasticiser in a flooring polyvinyl chloride composition which contains polyvinyl chloride and 20-200 pts. wt plasticiser per 100 pts. wt polyvinyl chloride in order to reduce overall content of plasticiser in the composition compared to main plasticisers. The polyvinyl chloride composition for use in making anti-stain upper layers of floors contains polyvinyl chloride, C9-C11 alkylbenzoate, a plasticiser different from C9-C11 alkylbenzoate and can additionally contain a stabiliser. The polyvinyl chloride composition for use in making glass ingrained textile floor layers with thick fleece contains polyvinyl chloride, C9-C11 alkylbenzoate, a plasticiser different from C9-C11 alkylbenzoate, a stabiliser and filler. The polyvinyl chloride composition for use in making decorative foamed floor layers contains polyvinyl chloride, C9-C11 alkylbenzoate, a plasticiser different from C9-C11 alkylbenzoate, a blowing agent and can additionally contain a TiO2 stabiliser. The polyvinyl chloride composition for use in making layers of foamed floor lining contains polyvinyl chloride, C9-C11 alkylbenzoate, a plasticiser different from C9-C11 alkylbenzoate, a blowing agent and can additionally contain a TiO2 stabiliser. Said polyvinyl chloride compositions contain a plasticiser different from C9-C11 alkylbenzoate which is selected from a group comprising di-2-ethylhexylphthalate, diisononylphthalate, di-2-propylheptylphthalate, diisodecylphthalate, di-2-ethylhexylterephthalate and mixtures thereof. |
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Novel aqueous dispersions of reinforced rubber and use of said dispersions to make foamed latex Aqueous dispersion contains: a) from 51 to 90 wt % polymer particles of basic latex and b) from 10 to 49 wt % polymer particles of reinforcing latex, containing structural links of aromatic vinyl monomers and conjugated diene monomers. Amount of latex is given in terms of total mass of polymer particles in the rubber dispersion. Polymer particles of the reinforcing latex have a single glass transition temperature (Tg) from -25°C to 28°C, measured through differential scanning calorimetry (DSC). The polymer particles of the basic latex have Tg, measured through differential scanning calorimetry, lower than Tg of particles of the reinforcing latex. |
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Method of obtaining porous plastic materials from unsaturated polyester resins Porous plastic materials from unsaturated polyester resins are obtained by their foaming with carbon dioxide, released during interaction of sodium carbonate with acid, in presence of zinc stearate, aerosyl, hardener- cyclohexanone peroxide and accelerant - cobalt napthenate, in which into mixture of initial reagents, which does not contain water, solution is introduced as acid component of gas-forming agent acetic acid in water-free diethylformamide. |
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Invention deals with development of foamed cryogel materials, which can be used in construction and arrangement of oil and gas wells in north regions, during restoration of land in cryolite zone regions, and in oil production and oil transportation processes. Composition contains polyvinyl alcohol, water as solvent, and additionally sodium chloride, carbon black, and glycerol. Foamed cryogel is formed via air-assisted foaming of proposed composition followed by freezing-thawing cycle. |
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Method of preparing open-cell foamed material Invention relates to foamed material constituted by cross-linked amino-formaldehyde polymer product suitable for filtration of tobacco smoke. Foamed material according to invention contains cavities and intermediate spaces located outside of cavities, said spaces being confined by walls consisted of cross-linked amino-formaldehyde polymer product optionally supplemented by additives. Average space dimension lies within 30 to 350 μm. Considerable portion of spaces have two or more perforations with average diameter within a range of 5 to 300 μm in their walls while considerable portion of perforations of neighbor spaces are arranged relative to each other in such a way as to form continuous nonlinear path. Foamed material is characterized by porosity at least 45 vol % and specific surface area 0.1 to 15 m2/g. Method of preparing of such foamed material comprises following stages: mixing air and foaming agent solution under pressure in mixing zone of injector filled with multiple inert mixing members; passing, under pressure, non-hardened foam from mixing zone and prepolymer solution into reaction zone of injector to form curable foam; and discharging foam and drying it in air. Use of such foamed mixture as cigarette filter allows content of toxic compounds such as resins and polycyclic aromatic compounds to be lowered. |
Another patent 2542087.