Composition for obtaining foam

The invention relates to the production of building materials, allows qualified to recuperate processing waste wood and can be used in woodworking, furniture and construction industries

The invention relates to woodworking industry and can be used in the production of chipboards

The invention relates to a wood press the compositions and can be applied as removable elements in different types of packaging

The invention relates to woodworking industry and can be used in construction and furniture production

The invention relates to the recovery of waste oil and fat industry, production based on waste materials type of chipboard and can be used in the woodworking and construction industries

The invention relates to methods for producing foams based on urea-formaldehyde resin and can be used for thermal insulation of building structures, pipelines and so on

The invention relates to the field of processing of macromolecular substances to porous

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.

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.

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.

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 (T_g) from -25°C to 28°C, measured through differential scanning calorimetry (DSC). The polymer particles of the basic latex have T_g, measured through differential scanning calorimetry, lower than T_g of particles of the reinforcing latex.

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.

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.

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.

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 %.

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.

Invention relates to the area of preparing urea-formaldehyde resin-based thermosetting binders used in woodworking industry for manufacturing wood particle boards, plywood, wooden fiberboards, and the like, and which may be used in production of foamed materials. Polymer binder comprises 100 wt parts of urea-formaldehyde resin mixture and 1-5 wt parts of curing agent, said urea-formaldehyde resin mixture containing (i) urea-formaldehyde resin with 10-40% uronic cycles and weight portion of dry residue 55.0-65.0% and (ii) urea-formaldehyde resin with weight portion of dry residue 60.0-80.0% at (i)/(ii) ratio (5-95):(95-5). Urea-formaldehyde resin contain essentially no methanol.

Invention relates to concentrates designated for using in cleansing equipment for processing polymeric material-extruders, thermoplastic automates and so on in change from color to color and from "pickups" representing particles of decomposed polymer and deposited on the equipment surface. The concentrate for cleansing equipment comprises, wt.-%: carbamide, 0.3-30; dicarboxylic aliphatic (C₃-C₈)-acid, 0.3-30, and polymeric binding agent, the balance. The concentrate can comprise also, wt.-%: monocarboxylic aliphatic (C₁₄-C₁₆)-acid, 0.3-20; calcium stearate and/or zinc stearate, 0.2-1.0; thiourea, 0.3-15, and biuret, 0.3-15. As a polymeric binding agent polyethylene of low density or copolymer of ethylene and vinyl acetate is used. Invention provides reducing exhaust of ammonia in atmosphere.

Invention, in particular, relates to carbamide foam plastics and can find use in layered building structures. Composition contains, wt parts: urea-formaldehyde resin 100, alkylbenzenesulfonic acid 1.8-2, 50% 1-oxyethylidenediphosphonic acid solution 4.0-4.4, swelled perlite sand 1-4, and water 60-80.

Proposed coat contains resorcinal-formaldehyde resin CF-282 with addition of carbamide-formaldehyde concentrate CFC-85; used as hardening agent of liquid carbamide-formaldehyde concentrate is aqueous solution of formalin, ethylene glycol and carboxymethyl cellulllose and hexamethylene-tetramine; 100 parts by mass of resorcinal-formaldehyde resin contain the following components, %: carbamide-formaldehyde concentrate CFC-85, 35-50; hardening agent, 22-25; hexamethylene-tetramine, 3-6.

Invention pertains to mixtures of high-molecular compounds for obtaining carbamide foam plastics. The following percentage mass ratios are proposed for the components of the mixture: 1.00 - amino-formaldehyde resin, 0.01-0.02 - surface-active substance, 0.06-0.10 - mono-substituted phosphate salt of 6-amino caproic acid (acid catalyst and, a modifier at the same time), and 0.8-1.2 - water. The mixture uses an amino-formaldehyde resin containing 0.1-14 % free formal dehyde and an acidic substance is the preferred surface active material. The invention allows to increase strength at pressure of up to 0.09-0.25 MPa. The obtained foam plastic has an aggregative stability of on not more than 4%. Emission of formaldehyde in the foam plastic lowers to 0.08-0.4 mg/ m³%. The invention can be used in the production of thermal and sound-proof materials for wall sandwich panels of prefabricated buildings, noise barrier panels enclosed along automobile roads and railway lines, as well as refrigeration technology.