Protective epoxide-wood coat for foam polystyrene

FIELD: construction.

SUBSTANCE: invention is related to epoxide-wood composition for production of pressed boards used to cover foam polystyrene plates from external and internal sides on glue in order to protect them against external impact and to increase their service life. Composition includes the following components, with their following ratio, wt %: 37.2-43.5 of epoxide-diane resin ED-20, 3.7-4.3 of amine hardener of polyethylene polyamine, 43-52.1 of pine woodchip filler, 6.3-11.9 of polymer filler. Polymer filler used in composition is foam polystyrene chips - wastes of heat insulation production.

EFFECT: invention makes it possible to increase physical and mechanical characteristics of composition, to recycle wastes of wood processing and heat insulation materials.

2 tbl, 3 dwg

 

The invention relates to construction materials, manufactured on the basis of epoxy resin, and can be used for cover of EPS boards to protect them from external exposure and increase their lifespan.

For similar taken epoxy-woody composition for coating wood and chipboard (patent RU 2288929 C1, bull. No. 34, 10.12.2006. Epoxy-wood composite)including epoxy resin ED-20, polyethylenepolyamine as amine hardener, a filler and a plasticizer, the next content, wt.%:

epoxy Dianova resin ED-2032
- polyethylenepolyamine3,2
the plasticizer (ITU-1)4,8
- crumb rubber40
pine sawdust20

The disadvantages of the known compositions are insufficient in heat resistance and high density.

As the prototype was taken polystyrene plates manufactured bespressovyj way of suspension foaming polystyrene with addition or without addition of ant is pyrene, intended for thermal insulation as a middle layer enclosing constructions and industrial equipment (GOST 15588-86. The polystyrene plates. Technical conditions. - M.: Publishing house of standards, 1986. - 12 S.). This material has a low mechanical strength and durability, unstable to ultraviolet radiation.

The technical problem of the invention is the protection of EPS insulation from UV radiation, increase the static strength of the plate, which will increase the service life of the insulating layer; disposing of waste wood and insulation materials.

The goal of the project is achieved by the fact that polystyrene plate with inner and outer sides with glue closes tiles insulating epoxy-woody composition with a thickness not less than 4...5 mm From the inner side epoxy-woody composition is applied to increase the structural strength and reduce the deformation property.

For the manufacture of epoxy-wood covering the following materials were used: Dianova epoxy resin ED-20 (GOST 10587-84), polyethylenepolyamine (TU 2413-357-00203447-99) (PET) as the amine hardener, wood filler (pine shavings) wood waste, polymer filler EPS CROs is ka (granule size: 0,315...5 mm), obtained by crushing waste expanded polystyrene of different brands, with the following content, wt.%:

epoxy resin ED-20 - 37,2...43,5;

the polyethylenepolyamine (10% by weight of the resin) - 3,7 4,3...;

wood filler - 43...52,1;

EPS crumb - 11,9 6,3....

Particle size of the fillers was determined as the residue on the sieve size 2,5:1,25:0,63:0,315:0,14:0 mm,% and amounted respectively to pine sawdust: 15:7:34:31:4:9 and for polystyrene crumbs 43:41:12:4:0:0.

Plates epoxy-wood coatings produced by flat pressing of the filler particles mixed with a binder. To reduce the viscosity of epoxy resin ED-20 is heated to 50-60°C, then it enter the hardener. In a mixture of pine sawdust and polystyrene crumbs add a binder and mix thoroughly. The prepared composition is placed in a metal mold and pressed at a pressure to 0.108 MPa during the day. After removal of the forms to speed up the process of hardening the composition to produce a heat treatment at a temperature of 80°C for 2 hours. Then, on the surface of polystyrene plates glue TITAN and superimposed plates epoxy-wood cover with clamp. Next, the resulting plates are incubated prior to adhesive cure within 2 hours Scheme for epoxy-wood composition and coating p is napolitaines plate are presented in figure 1, the appearance of the combined plates are presented in figure 2.

Table 1
Physico-mechanical properties of epoxy-wood composition
№ p/pIndexValue
1Density, kg/m3340...490
2Ultimate tensile stress, MPa, at:
- compression (at 10% deformation)1,25...2,52
- transverse bending1,48...2,34
3The modulus of elasticity in compression, MPa, not less than
- in the direction of extrusion14.4V
in the direction perpendicular to the extrusion8,0
4Water absorption by weight, %, after exposure to water for
- 2 hours64,4...98,3
- 24 hours81,8...116,8
5Swelling in thickness, %, after exposure to water for
- 2 hours1,3 3,4...
- 24 hours1,8 4,7...
6Retained strength, %, after exposure to water for 24 hours64...73
7Thermal conductivity, W/m·K at 20°C0,078...0,142
8The coefficient of linear thermal expansion α×10-6, deg-13,4...4,54

Itself epoxy-wood coating has a low density (350 to 490 kg/m3adequate insulation and strength properties and water resistance. The heat resistance of the coating is higher than that of polystyrene, and therefore, the heater can be operated at a higher temperature.

Were conducted long-term mechanical tests the design of the heater when the destruction of the transverse bending mode of the selected constant voltage and temperature, fixing the time to failure (debt is durability). According to the time to failure (durability) of strength are presented in figure 3 and the values of strength and durability in table 2.

Table 2
Operating parameters of thermal protection materials.
IndexPolystyrene M50 grade, epoxy-wood trackStyrofoam brand M50Epoxy-wood track
12345
The temperature range tested18-40°C40-60°C20-60°C8-45°C
Durability, τ>100 years>100 years5 sec69,8 h
Strength under transverse bending at 20°C, MPa1,55Not less than 0,351,48
Heat resistance, R0m2 K/W2,482,660,86
Note:
R0defined for the plate thickness of 100 mm, the thickness of the epoxy-wood coating 5 mm, λ=0,142 W/m2K.
The composition of the epoxy-wood song: ED-20:PEPA:D:PPP=37,2:3,7:52,1:7.
Longevity was calculated at T=288 K and σ=0.3 MPa.

Reducing the structural strength of the insulation with temperature rise test is explained by the sensitivity of polystyrene and epoxy resin to the temperature. Apparently, at low temperatures the main load is on the floor, and polystyrene is triggered only when heating above 40°C.

Thus, the strength of the resulting construction has increased in comparison with the original EPS in 4 times, and predictable service life increased up to 100 years. The coated polystyrene plates, epoxy-woody composition with good mechanical and thermal properties, can increase turnaround cycles when replacing the destroyed heater during operation of the building. The results show that this composition can be applied as a protective coating for polystyrene plates, even when exposed to a damp environment.

The authors propose the following is relevant for the composition of the epoxy-wood compositions for protective coatings polystyrene foam boards, wt.%:

epoxy resin ED-20 - 40;

the polyethylenepolyamine - 4;

filler (pine shavings) - 44,8;

filler (polystyrene chips) to 11.2.

We offer epoxy-woody composition for protective coating of EPS boards has the following advantages:

- good physical and technical characteristics;

- protects the foam from UV exposure;

- increases the durability of the heat-shielding design;

- environmental safety;

- allows you to dispose of industrial and domestic wastes.

Epoxy-woody composition for extruded plates used for coating polystyrene foam boards with external and internal parties on glue to protect them from external exposure and increase their lifespan, including epoxy resin ED-20, polyethylenepolyamine as amine hardener, wood filler pine shavings, polymeric filler, characterized in that the polymer filler contains polystyrene chips - waste production of insulation products, with the following content, wt.%:

epoxy Dianova resin ED-2037,2-43,5
the polyethylenepolyamine3,7-4,3
pine shavings43-52,1
polystyrene chips6,3-11,9



 

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2 tbl, 8 ex

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FIELD: chemistry.

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5 cl, 2 tbl, 8 ex

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2 tbl, 1 dwg

Lacquer composition // 2314328

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3 tbl, 17 ex

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2 tbl, 6 ex

FIELD: technological processes.

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1 dwg, 1 tbl

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FIELD: wood industry.

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9 cl, 13 dwg

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1 dwg, 1 tbl

FIELD: construction.

SUBSTANCE: converted timber or chip plate is made of eucalyptus breeds and connected by means of binding substance containing isocyanatic or phenol polymeric compound. Eucalypti of the following species were selected: Bluegum (E. Globulus), Karri (E. Diversicolor), Sydney Bluegum (E. Saligna), Marri (E. Calophylla) or Jarrah (E. Marginata).

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10 cl, 1 dwg

FIELD: technological processes.

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EFFECT: invention makes it possible to prepare ecologically clean, thermally resistant and moisture resistant items.

8 cl, 3 tbl

FIELD: construction.

SUBSTANCE: rush stems are flattened in rolls, laid mutually perpendicular and milled into shreddings with particle size of 5-15 mm or into powder with particle size of 100-300 mm, saturated with water solution of bakelite resin in amounts of 1-2% or with water solution of wax emulsion, or mixed with heated up to liquid state bitumen or with particles of wire in amounts of 0,5-2%. Then the raw material is heated up to release of proper bonding agents, pressed either in pressing molds or through shaped hole of pressing mold with required products forming and is hold in acclimatisator until cooling.

EFFECT: invention allows for reducing energy consumption and obtaining strong, durable and ecologically clean construction materials, products and structures.

2 cl, 4 ex

FIELD: construction.

SUBSTANCE: reed laminose material is made of dace or southern reed, contains odd, maximum 15, quantity of the layers executed from cut lengthways on thin strips of a reed stalks and laid in an is mutual-perpendicular direction. Strips are impregnated by carbamide, urea-formaldehyde or phenol-formaldehyde gluing compositions with hot solidification and are pressed in compression moulds at temperature 100-140°C and pressure 0.8-1.5 MPa. Equipment for manufacture of a reed-layered material has the conveyor consisting from plates for feed of a reed slab, the slab piercing gear, the directive conveyor connected to hydraulic system and executed with possibility of its movement by the rail together with a cutting frame by means of the longitudinal feed gear. Equipment also contains the horizontal dividing device for reed layer partitioning off from a total mass, directive bulwarks for the reed layer feed on a slab, glue feed system for reed impregnation by glue, the elevating device, the device for lowering of a reed layer on size of the removed layer, with possibility of feed of the received laying in system of hydraulic pressing for formation of a reed-layered material.

EFFECT: invention will allow receiving a material with high technological properties.

2 cl, 5 dwg

FIELD: wood=working industry, in particular, production of presswork from particles of vegetable origin.

SUBSTANCE: in the method for production of composite boards without addition of a binder, from a hydrolyzed lignocelluloses material, before hot pressing, the fibrous mat is formed with the use of a film of polyethylene, up to 0.2 mm thick, laid as a component of the external layers of the pressed composition. Pressing is performed at a temperature of 120 to 140 C and a unit pressure of 50 kg/sq.cm at a duration of pressing of 1 min/1 mm of the board thickness.

EFFECT: enhanced moisture resistance of composite material.

3 ex

FIELD: wood-working industry, and namely the method of manufacture of the structural unit, in particular, slab of wood fiber, wood chip and/or sawdust, and pressing of fiber, chip, and/or sawdust with applied glue for formation of the structural unit, in particular, slab.

SUBSTANCE: at first the wood fiber, chip and/or sawdust are decomposed by steaming into liquid components and hard components. The liquid components are separated and cooled inside the closed hermetic system up to their discharge from the system. During this process the ecological load caused by odor is sharply reduced. The invention also includes a device for realization of the method and a structural unit manufactured on it.

EFFECT: produced an ecologically pure method for manufacture of slabs and a device for its realization.

46 cl, 3 dwg

FIELD: compositions used for manufacture of plates from wood laminate.

SUBSTANCE: composition for manufacture of plates contains rice shell or rice shell and sawdust mixture used as filler, liquid sodium glass having modulus of 2.4-3.6, and silicon dioxide. Artificial silicon dioxides or siliceous dust-like wastes of various industries may be used as silicon dioxides, with SiO2 content making at least 80%. Composition components are used in predetermined ratio.

EFFECT: improved strength and water tightness, and increased efficiency in utilization of various wastes.

2 tbl

FIELD: wood-working industry; production of pressed building items.

SUBSTANCE: the group of inventions is pertinent to the field of production of pressed building items made out of plant roughage and may be used in wood-working construction industries and other branches of economy. The panel made by pressing out of a carpet without synthetic binding materials consists of a mixture of a birchen bark ground up to a faction of 40-5000 microns and a filler predominantly out of cellulose filaments at the following ratios in respect to the total dry solid matter (in mass %): a birchen bark - 60-95, cellulose filaments - 5-40. In an alternative version of the panel, which is made the same way as the above, the outer surfaces of the carpet are strengthened with lingo-cellulose-polymeric compound including an excelsior and the KF-EC resin with a hardener or an excelsior and triturated secondary polymer taken in amount of 10-12 mass % to the weight of the excelsior. At that the share of the lingo-cellulose-polymeric compound makes 20-40 % to the total dry weight of the carpet. The method allows to use a ground birchen bark without synthetic binding agents for shaping a carpet and its consequent pressing. At that for a carpet formation they use the birchen bark ground up to a faction of 40-5000 microns, and a filler mainly made out of cellulose filaments taken in the following ratio in respect to the total dry weight(in mass %): a birchen bark-60-95, cellulose filaments - 5-40. Before formation of the carpet the filler is moistened up to 18-20 % of absolute humidity and is mixed with ground birchen bark. The carpet is formed with a thickness equal to 200-300 % of the thickness of a finished panel. The group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.

EFFECT: group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.

8 cl, 1 tbl

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