Dry glue for wallpaper and method thereof
(57) Abstract:Describes how to obtain the dry glue for Wallpaper, which provides for mixing of the starch commodity humidity 13 - 20% with a reagent solution containing 0.04 to 0.2% of sodium hydroxide, 0.2 to 2.0 percent borax and 0.1 to 1.0% fruit essences to the dry weight of the starch, to obtain a mixture with a mass fraction of moisture 22.5 to 25.0% of the subsequent thermo-mechanical treatment of the mixture extrusion method at a temperature of 135 - 155oWith the pressure in the working chamber of 0.8 - 1.4 MPa for 32 - 40 C. also Described dry glue for Wallpaper. The technical result is to intensify production and improve the quality of dry glue, reducing its cost and simplification of the process of preparing ready-to-use adhesive that does not require cooking and prolonged swelling. 2 c.p. f-crystals, 1 table. The invention relates to the field of dry powdered starch adhesives, soluble in cold water, and can be used in the starch industry and in everyday life for wallpapering.Known dry powder adhesives brand "Extra" and "CMC-N" (karboksimetilcelljulozy) used for wallpapering.Glue the "Extra" vkljuchaetsja. - M.: Stroiizdat. 1984, S. 188).The disadvantages of this glue should be what he is after dissolution in water becomes dark due to the presence of dextrin and copper sulphate. To use, you must perform a number of operations to carry out the mixing glue with water; boiling mixture (heating the aqueous dispersion to 90 - 95oC) cooling the adhesive to room temperature. This greatly limits its use in new buildings due to the lack of necessary equipment and heaters and the impossibility of melting glue in under construction houses.The closest in technical essence and the achieved positive effects to the invention the substance is dry glue for Wallpaper "CMC-N, containing 90 - 92% of the polysaccharide is carboxymethyl cellulose and 8 to 10% water. (Glue Wallpaper brands CMC-N. THE 6-15-1077-77).The disadvantage of this glue is that it making you want to spend a lot of time on the dispersion of the adhesive in water - 12-24 hours at the following ratio of components in weight%: glue KMTS-N" - 10% water - 90%.The adhesive has high alkalinity and the ability to penetrate through the base paper Wallpaper, which significantly limits the scope of his primeramente glue "CMC-N" conducts to the formation of Wallpaper dark spots, bands greening metal pigments remaining on the Wallpaper after gluing and drying.The closest in technical essence of the method of production and achieved the positive effect of the invention is a method for the production of dextrin (polysaccharide adhesive based on starch), manufactured according to the approved instructions. (Instructions for the production of dextrin, approved by the Deputy head of the Main Department of confectionery and starch industry Ministrom of the USSR M., Gubina December 25, 1980).The method includes processing the commodity starch humidity 13 - 14% reagent - solution of hydrochloric acid in the amount of 0.08% by dry weight of the processed starch, heat treatment of the mixture of starch with an acid solution at a temperature of 135 - 155oC for 3 - 4 hours on the devices of periodic action, then the cooling of the dextrin to a temperature of 40 - 50oC for 15 - 30 min, grinding grain and screening of dextrin.However, this method allows to obtain dextrin, which is used only as one component in the production of Wallpaper glue "Extra" and may not be used in pure form for gluing on the et and has the ability to penetrate through the paper when the concentration of the adhesive is less than 20%.The technical task of the present invention is to intensify production and improve the quality of dry glue, reducing its cost and simplification of the process of preparing ready-to-use adhesive that does not require cooking and prolonged swelling.The solution of the technical problem is achieved by the proposed method have the extrudate is dry powder krahmaloprodukt by thermo-mechanical treatment of the mixture of starch - R-R reagents with a mass fraction of moisture 22.5 to 25.0% of the extrusion installation, for example, twin-screw extruder brand RZ-QED-88 at a temperature of 135 - 155oC, the pressure before the matrix of 0.8 - 1.4 MPa for 32 - 38 C.The method of obtaining dry powdered starch glue for Wallpaper is as follows: starch commodity humidity (13 - 20%) to introduce the reagent solution to obtain a mixture with a mass fraction of moisture 22.5 to 25.0% and a content of 0.04 to 0.2% NaOH (sodium hydroxide), 0,2 - 2,0% borax (sodium binarily tetraborate) and 0.1 to 1.0% fruit essences (OST 18-103-84 aroma food Essences for the confectionery) to the dry weight of starch.The addition of the reagent solution is produced with continuous stirring KRA is 135 - 155oC, frequency of rotation of the augers - 180 - 190 rpm and the pressure before the matrix of 0.8 - 1.4 MPa for 32 - 40 C, the mixture is then forced through the die holes of any shape.Thermomechanical treatment of the mixture at the specified mode provides obtaining the extrudate white color with a high bonding strength, good dispersibility in cold water, a pleasant smell and is resistant to the action of microorganisms.High pressure and temperature in the working chamber of the extruder and the presence of sodium hydroxide and borax allows for a short period (32 - 40), not only to destroy the structure of the grains of starch and destructivity his macromolecules, but also to ensure the formation of the product with the new structure, including complex compounds borax split-starch polysaccharides and part of free water through hydrogen bonding.Adding borax significantly slows down the formation of ordered aggregates of molecules are linear polysaccharides of starch in aqueous dispersions of adhesive, accompanied by their dehydration and precipitate in the adhesive. Processed in the conditions of extrusion krahmaloprodukt easily dispersed in cold water, has a homogeneous consistent. The resulting extrusion processing product containing 90% extruded starch and 10% water, ground, providing particles passing completely through a sieve with holes 3x3 mmShelf life of dry glue in place at a relative humidity of 65 - 70% not less than 2 years.The use of alkali of less than 0,04% by dry weight of the starch does not provide the required splitting of the starch macromolecules. Obtained in such conditions, the water dispersion of the extrudate have low bonding strength and are dispersed in cold water with formation of a large number swelled but did not dissolve in water lumps of starch.The increase in the consumption of alkali more than 0.2% lead in extrusion processing to a high degree of splitting of the starch macromolecules and obtaining aqueous dispersions of adhesive with a low viscosity at high solids content. This adhesive has a high fluidity and penetrates at gluing through the Wallpaper.The use of other alkali increases the cost of dry adhesive and cannot provide light glue with good solubility in cold water and gluing ability.Increased consumption of borax more than 2.0% leads to arr is in lumps.Reducing consumption of borax less than 0.1% does not provide sufficient binding of water does not increase the viscosity of aqueous dispersions of adhesive. The adhesive thus obtained liquid, quickly exfoliates and has a low bonding strength.Increase consumption of fruit essences more than 1.0% leads to a sharp odor, and reduced fruit essences less than 0.1% almost does not feel pleasant smell.Adhesive for gluing of wall-paper is prepared as follows: dry extrudate starch dissolved in cold water with continuous stirring.Below is the recipe we offer glue (in wt.%): the extrudate is 5-9%, water - 95-91%.Ready-to-use adhesive is a light uniform castelobranco mass, which is uniformly applied on the surface of the Wallpaper. Tack glue high. The drying time of the glue - 2.0-2.5 hours, glue Extra 12 hours, glue "CMC" - 7-9 hours.The shelf life of the diluted water extrudate 2 to 10 days.The adhesive has a low cost, due to the high intensification of production and cheapness of raw materials.Example: corn, tapecopy or potato starch commodity humidity is 0,5, of 0.1 to 1.0% borax, 1,1% fruit essences to the dry weight of starch.Vegetarianismo processing the mixture at a moisture content of 22.5%, 23%, 24.1% and 25,0% is carried out in co-rotating twin screw extruder at a temperature of 135, 145, 150 and 155oC and the pressure before the matrix of 0.8 - 1.4 MPa.In the extrusion processing receive adhesive for Wallpaper with physical-chemical indicators presented in the table. 1. The method of obtaining dry adhesive comprising mixing starch with a reagent solution heat treatment of the mixture at a temperature of 135 - 155oC, grinding and sieving, characterized in that for the degradation of starch in it add the reagent solution containing 0.04 to 0.2% of sodium hydroxide, 0.2 to 2.0 percent borax and 0.1 to 1.0% fruit essences to the dry weight of starch, and thermomechanical processing mixture humidity 22.5 to 25.0% of spend extrusion method over 32 - 40 C at a pressure of 0.8 to 1.4 MPa.2. Dry glue for Wallpaper, including polysaccharides and water, characterized in that the polysaccharide is a dry powder extrudate obtained under item 1, containing degraded polysaccharides starch, 0.04 to 2.0% of sodium hydroxide, 0.2 to 2.0 percent borax and 0.1 to 1.0% fruit essences to the dry weight of starch.
FIELD: adhesive composition, in particular adhesive paste for wallpaper.
SUBSTANCE: claimed composition contains flavoring agent releasing adhesive, component comprising of at least one flavoring agent, and at least one carrier. Composition is in dry form such as powder or granules and can be mixed with water. Moreover in odor-releasing component at least one flavoring agent is bond to carrier in such a manner that said flavoring agent in released from composition only after component contact with water. As carrier preferably cyclodextrin or derivatives thereof are used.
EFFECT: composition free from displeasing odor after blending with water.
7 cl, 1 ex
FIELD: production of the glue composition of labeling assignment.
SUBSTANCE: the invention is pertaining to production of the glue composition of labeling, in particular, to the glue composition designated for sticking of the glue impregnated-paper labels to the glass, plastic, metallic, ceramic and wood surfaces. The invention allows to produce the glue compositions, which are distinguished by the increased frost-resistance: withstanding the multiple freezing and defreezing. The composition is produced by combination of two compounds preliminary heat-treated at the temperature of 80-90°C and their subsequent heat treatment together with the modifying agent - Amylum at 90-95°C, and bring up to pH=7.0-7.5 IN by KOH or NaOH solution. At that the composition 1 contains: dextrin, gum-arabic pretreated at 130°C and under the residual pressure of 05 mmHg, water; the composition 2 contains: colophony, glycerin, borax, water. At that the first composition was thermotreated in presence of several drips of antifoaming liquid. The labels gain positive stability against a shearing within 10 seconds and after 5 minutes can be torn-off only with a break of the paper.
EFFECT: the invention ensures, that the labels gain positive stability against a shearing within 10 seconds and after 5 minutes can be torn-off only with a break of the paper.
1 tbl, 8 ex
FIELD: glue materials.
SUBSTANCE: invention relates to a method for preparing glue Stein hall with the high content of dry matter by using a single mixing capacity and comprising the following steps: 1) preparing a carrier by gluing the first part of starch in medium containing part of alkali necessary for preparing the glue; 2) diluting a carrier with water followed by addition of at least lesser part of the second part of starch; 3) addition of remaining part of the second part of starch and remaining part of alkali in diluted form that is necessary for preparing the glue. Addition of remaining the second part of starch and alkali is carried out in stages. Invention provides preparing the glue with the high content of dry and simplifying technology for its preparing.
EFFECT: improved preparing method.
10 cl, 2 ex
SUBSTANCE: composition contains carrier starch and secondary starch. The carrier starch contains (in terms of dry mass), less than 50% pre- gelatinised starch and has higher sensitivity to alkali than the secondary starch. The secondary starch is selected from a group comprising maize starch, potato starch, wheat starch and a mixture of two or more of the said types of starch. The carrier starch is selected from a group comprising wheat starch, potato starch, cassava starch, barley starch and a mixture of two or more of the said types of starch. The composition contains (in terms of dry mass) 0.5-60% carrier starch, 40-99.5% secondary starch and 1-8% alkali. The composition also contains (in terms of dry mass) 0.1-3.5% boron compound. An adhesive is obtained by adding the composition to water and stirring while adding a sufficient amount of alkali. The adhesive is used to make corrugated cardboard and multilayer materials. The advantage of the adhesive composition lies in that it can be easily prepared with low expenses on time and equipment.
EFFECT: use of the adhesive improves quality of cardboard, reduces adhesive consumption and increases rate of production.
25 cl, 6 tbl, 1 ex
SUBSTANCE: method involves depositing an adhesive system onto one or more pieces of wood-based material and joining one or more pieces with one or more additional pieces of the material. The adhesive system contains one component which contains starch, and another component which contains one or more polymers belonging to a group comprising polyvinyl amine, copolymers poly(vinyl alcohol-co-vinyl amine), poly(vinyl alcohol-co-vinyl formamide), polyallyl amine, polyethylene imine, polyamido amine and polyvinyl formamide. The two components are deposited on the wood-based material as unmixed separate components. The adhesive system further contains one or more polymers containing acetoacetylated polyvinyl alcohol.
EFFECT: use of the adhesive system enables to produce such wood-based products as boards based on chips, particles or fibres or boards based on aligned long chips.
19 cl, 1 tbl, 2 ex
SUBSTANCE: method involves applying a water-based adhesive composition which contains non-gelled starch and additionally 0.1-50 wt % of one or more polymers (P) having an amine group or an amide group onto one or more parts of wood-based material and joining the one or more parts with one or more additional parts of wood-based material.
EFFECT: high quality of gluing.
13 cl, 2 tbl, 5 ex
SUBSTANCE: invention relates to adhesive compositions, which are mainly applied in paper and cardboard industry, obtaining adhesive composition, to dry premix composition and method of its obtaining. Aqueous adhesive composition contains at least 7 and mot more than 30 wt % of adhesive component. Adhesive component includes at least one polyvinyl alcohol, and/or at least one dextrin, and/or at least one starch. Adhesive composition additionally includes carbomer and in case of necessity boron compound. PH of adhesive composition constitutes not more than 13.0. In case if starch and boron compound are present in adhesive composition, more than 91.0% of the total starch in composition are in form, non-soluble in cold water. In accordance with invention obtained are: solid dry premix, suitable as base for adhesive composition, and methods for obtaining solid dry premix or adhesive composition and product, in which all of them are used to form adhesive connection with substrate.
EFFECT: invention makes it possible to prepare adhesive composition, viscosity of which is easily predicted and regulated, which makes application of starch more effective, demonstrates Newtonian rheology, preferably in the process of corrugating.
22 cl, 7 dwg, 1 tbl, 9 ex
SUBSTANCE: invention relates to product based on bound mineral fibre, which is characterised by high fire-resistance according to category Class A1 documented in EN 13501-1 Standard, as well as improved resistance to decay, said product based on mineral fibre involves artificial glass fibre (AGF) bonded by hardened binder composition, wherein uncured binder composition contains (a) component based on sugar and either (b) polycarbonacid component and alkanolamine or (c) product of reaction between polycarbonacid component and alkanolamine, or (d) combination of (b) and (c), number of sugar-based component (a) ranges from 42 to 72 wt% per total weight of (dry substance) components of binder.
EFFECT: invention also relates to method of making said product.
17 cl, 1 tbl
FIELD: chemistry; construction.
SUBSTANCE: invention relates to an adhesive composition which does not contain formaldehyde, for mineral fibres, for sound-and/or heat insulation products based on mineral wool, particularly glass wool or rock wool, and to a method of producing sound-and/or heat-insulating product. Adhesive composition consists of at least one nonreducing sugar and ammonium sulphate in an amount of 3 to 20 wt% of total weight of mixture. Adhesive composition can additionally contain following additives: silane, in particular amino silane, oil, glycerol, silicone, "expander", and water.
EFFECT: invention enables to obtain products based on mineral wool, with improved resistance to ageing, in particular in moist environment.
8 cl, 1 dwg, 2 tbl, 22 ex
SUBSTANCE: aqueous dispersion of the polymer P comprises, wt %: ≥0.1 and ≤2.5 acrylic acid, methacrylic acid and/or itaconic acid (monomer A), ≥0.1 and ≤1.5 allyl methacrylate (monomer C), ≥0.1 and ≤5.0 N-methylolacrylamide and/or N-methylol methacrylamide, ≥25 and ≤69.7 n-butyl acrylate, and/or ethyl acrylate, ≥30 and ≤70 styrene (monomer F). The amounts of monomers A, C, D, E, F in total amount to 100 wt %. The aqueous binder formulation further comprises a saccharide compound S selected from hydroxypropylated potato starch, the amount thereof being such that it is ≥10 and ≤400 wt. parts per 100 wt. parts of the polymer of P. Total amount of the saccharide compound S is added to the aqueous dispersion of the polymer P. Method of producing a molded article from fibrous substrates, the use of an aqueous composition of a binder as a binder for fibrous substrates, non-cement coatings, sealants and adhesives and the use of a moulded article for the production of bituminous roofing cloths.
EFFECT: providing an aqueous dispersion of the polymerizer and an aqueous dispersion of the binder, by means of which it is possible to produce moulded articles with an improved transverse rupture force index at room temperature or reduced stretching at an elevated temperature.
17 cl, 1 tbl, 13 ex