SU1366495A1 - Method of manufacturing heat-insulating material - Google Patents

Abstract

The invention relates to the production technology of building materials, in particular, to the technology for producing gypsum polymer mixtures, and can be used for the production of structural heat insulation, heat insulation and sound insulation materials. The aim of the invention is to reduce the density and water absorption of the material. The method of obtaining the heat insulating material is that after preparing an aqueous solution of the urea-formaldehyde resin, hydrolytic lignin is introduced, playing the role of hardener, and mixed for 1-2 minutes. Then, phosphogypsum is semi-aquatic and the mixture is stirred for 2-3 minutes and, last of all, expanded perlitic sand is introduced, which is stirred for 1-2 minutes. The components of the mixture are in the following amounts, - wt,%: hydrolyzed lignin 1.5-3.25; phosphogypsum semi-aquatic 18.25-29.4; expanded perlite sand 13.5-17.3; an aqueous solution of urea resin - the rest. The material has an average density of 380-536 kg / m, compressive strength after 28 days, 0.9-2.62 MPa, flexural strength of 0.65-1.60 MPa, volume water absorption after 48 hours, 22.9-23, 60%. 2 tab. (L

Description

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The invention relates to the production technology of building materials, in particular, to the technology of producing hypopolymer mixtures, and can be used for the production of constructional and thermal insulating materials, thermal insulating materials and sound insulating materials.

The object of the invention is to reduce the density and increase strength.

Thermal insulation material is obtained by the following method

In the concrete mixer, a urea-formaldehyde resin solution (KF-MT) is prepared, then lignin hydrolysis is introduced into the solution and mixed for 1-2 minutes to evenly distribute the lignin, which plays the role of hardened resin. Next, phosphogypsum semi-aqueous (2-3 minutes) is introduced with stirring. Such a sequence of mixing of the components provides a homogeneous solid mass — polymer-phosphoipup, in which the expanded perlite sand is introduced last into iz-. running abrasion of perlite grains is mixed for no more than 1-2 minutes,

The results of the implementation of the method on. specific examples are given in table. one,

To prepare an aqueous solution of the urea-formaldehyde mixture, water and KF-MT resin are taken. In aqueous solution

polymere-phosphogypsum. Expanded perlite sand is introduced into the resulting mass and mixed for 5 min. The finished plastic mixture is placed in the form of 4x4x16 beams, compacted for 1 minute on the vibrating table. After hardening under natural conditions, samples are tested after 28 days. All tests are carried out in accordance with current State Standards for testing.

 The test results are presented in Table. 2

The mixture after the introduction of perlite sand cannot be mixed for more than 2 minutes, since its grains are destroyed and the mixture is compacted. When mixed for less than 1 minute, the mixture is non-uniform.

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Claims (1)

Invention Formula A method of manufacturing a heat insulating material, comprising preparing an aqueous solution of a urea formaldehyde resin, introducing alternate perlite perlite sand, semi-aqueous phosphogypsum and hydrolyzed lignin into it with mixing the mass after the introduction of each component, and after the introduction of sand is mixed for 1-2 minutes characterized in that, in order to reduce the density and increase strength, lignin is first introduced into the resin solution thirty Resins are injected with lignin hydrochloride and then phosphogypsum, after which perlite is stirred for 1.5 minutes. Next, phosphor sand, respectively, is introduced in semi-aqueous gypsum and gypsum and mixed for 2.5 minutes until homogeneous masses are obtained in wt.% Of the mass of the mixture 1.5-3.25; 18.25-29.4; 13.5-17.3. polymere-phosphogypsum. Expanded perlite sand is introduced into the resulting mass and mixed for 5 min. The finished plastic mixture is placed in the form of 4x4x16 beams, compacted for 1 minute on the vibrating table. After hardening under natural conditions, samples are tested after 28 days. All tests are carried out in accordance with current State Standards for testing.  The test results are presented in Table. 2 The mixture after the introduction of perlite sand cannot be mixed for more than 2 minutes, since its grains are destroyed and the mixture is compacted. When mixed for less than 1 minute, the mixture is non-uniform. 20 Invention Formula A method of manufacturing a heat insulating material, including the preparation of an aqueous solution of a urea-formaldehyde resin, the introduction into it of alternately expanded perlite sand, semi-aquatic phosphogypsum and hydro-. rolling lignin with mixing of the mass after the introduction of each component, and after the introduction of sand is stirred for 1-2 minutes, which is different from the fact that, in order to reduce the density and increase strength, lignin is first introduced into the resin solution, then phosphogypsum, after which, perlite sand, respectively, in quan then phosphogypsum, after which, perlite sand, respectively, in quan wah in wt.% by weight of the mixture of 1.5-3.25; 18.25-29.4; 13.5-17.3. Urea-formaldehyde resin aqueous solution Phosphogypsum semi-aquatic Lignin hydrolytic Expanded perlite sand 63.9 61.9 54.5 52.9 58.2 57.5 18.25 21.9 26.9 29.4 26.8 23.0 3.25 1.50 1.80 2.9 1, 5 2.2 14.6 14.7 16.8 14.7 13.5 17.3 Table 1 14.7 16.8 14.7 13.5 17.3 Indicator 1 2 I 3 G 4 G 5 I 6 I Prototype Density, kg / mz 380 440 500 516 447 536 720-780 Strength, at a bend, MPa0,65 1,45 1,48 1,02 1,01 1,6 Tensile strength during compression, MPa 0.90 2.50 2.62 1.66 1.39 2.41 1.1-1.2 Bulk water absorption through 48 h,% 22.9 23.5 23.4 23.4 23.5 23.6 24.8-32.2 13664954 table 2 Example