Composite material

 

(57) Abstract:

Usage: composite materials based on fibres from rocks. The inventive composite material containing basalt fiber and polyvinyl acetate binder additionally contains dicyandiamide resin and/or glycol in the following ratio, wt. %: dilantininformation resin and/or polyethylene glycol 0,06-0,6; polyvinyl acetate binder 3,8-5,0; basalt fibre else. The proposed material has high mechanical strength. 3 C.p. f-crystals, 4 PL.

The invention relates to composite materials based on fibres from rocks, namely the composite material on the basis of basalt fiber, which finds wide application in industry and construction for insulation, and can be used in the manufacture of laminated plastics.

Widely known composite materials containing basalt fiber and polyvinyl acetate binder, for example, a composite material (J. Hariton, Fredrikson C. E. Cardboard on the basis of basalt fiber. Building materials and design. 1981, No. 3, S. 21-23) that contains, is prochnosti material under tension is 0.05-0.07 MPa (or 0.5-0.7 kg/cm2).

The specified insulation material is produced by impregnating irrigation canvases balzarova super-thin fiber in an aqueous solution of polyvinyl acetate dispersions and subsequent drying at 150-250oC for 20-25 min until complete removal of moisture.

The specified composite material is characterized by insufficient mechanical strength, which limits the use of these materials in the manufacture of laminated plastics.

The purpose of the invention by qualitative and quantitative changes in the composition of the composite material to produce a material having improved mechanical strength.

The problem is solved by the fact that the claimed composite material containing basalt fiber and polyvinyl acetate binder, according to the invention, further comprises dicyandiamide resin and/or polyethylene glycol, in the following ratio, wt.

Dilantininformation resin and/or polyethylene glycol 0,06-0,6

Polyvinyl acetate binder 3,8-5,0

Basalt fiber Rest

The inventive material has the following preferred options (composition, wt.):

Dicyandiamide components, wt.

The glycol 0,06-0,25

Polyvinyl acetate binder 3,8-5,0

Basalt fiber Rest

or composition, wt.

Dilantininformation resin 0,05-0,35

The glycol 0,01-0,25

Polyvinyl acetate binder 3,8-5,0

Basalt fiber Rest

The inventive composite material is characterized by high mechanical tensile strength of from 0.1 to 0.21 MPa in comparison with the known material (0.05 to 0.07 MPa).

The inventive composite material contains dicyandiamide resin and/or glycol in the amount of 0.06 to 0.6.

These compounds possess surface-active properties and improve the combination of basalt fiber with polyvinyl acetate binder.

Introduction to the structure of a composite material dicyandiamide resin and/or glycol in the claimed amounts increases the mechanical strength to 0.21 MPa. The increase or decrease of the number dicyandiamide resin and/or poly (ethylene glycol) below 0.06 wt. or above the proposed limits leads to reduction of mechanical strength of the material.

As dicendi">

As the polyethylene glycol used brand glycol PEG-35 (TU 6-14-719-82) or PEG-115 (TU 6-14-826-78).

As polyvinyl acetate polymer used dispersion of polyvinyl acetate (GOST 18992-80).

The manufacture of the claimed material is produced by impregnation of the canvas of basalt fibers with an aqueous solution containing organic components in the claimed proportions. Then make the extraction of excess binder and the formation of the material. Next make the drying of the material at 150-250oC for 20-25 min until complete removal of moisture.

Example 1.

The inventive composite material has the following composition, wt.

Polyvinyl acetate binder of 4.95

The glycol 0,15

Basalt fiber Rest

Made of the inventive material as follows. In chemical reactor with a mechanical stirrer prepare an aqueous solution containing 0.12 g/l of polyethylene glycol PEG-35 (TU 6-14-719-82) and 3.88 g/l polyvinyl acetate dispersion (GOST 18992-80). Canvases of basalt fibers impregnated with watering specified in an aqueous solution of polyvinyl acetate dispersions and polyethylene glycol. Next on rollers wring out the excess impregnating status is dried at a temperature 2301 min to completely remove the moisture.

For comparison, a similar process conditions are made known composite material by impregnation of the canvas basalt fibers with an aqueous solution containing 4 g/l polyvinyl acetate dispersion (GOST 18992-80). When this composite material contains 4.9 wt. PVA and 95.1 wt. basalt fibers.

Measurement limit of the tensile strength for the received composite materials is carried out according to GOST 17177-87. The results are given in table. 1.

Example 2.

The inventive composite material of the following composition, wt.

Dilantininformation resin 0,21

Polyvinyl acetate binder 5,0

Basalt fiber Rest

In chemical reactor with a mechanical stirrer prepare an aqueous solution containing 0.16 g/l dicyandiamide resin fixer, DCU (TU-6-14-947-78) of 3.84 g/l polyvinyl acetate dispersion (GOST 18992-80). Next, make a sheet of composite material similar to that described in example 1.

Conduct the measurement limit of the tensile strength for the received composite material according to GOST 17177-87. The results are given in table. 2.

From the data table. 2 should,"ptx2">

Example 3.

The inventive composite material of the following composition, wt.

The glycol 0,15

Dilantininformation resin 0,21

Polyvinyl acetate binder 4,79

Basalt fiber Rest

In chemical reactor with a mechanical stirrer prepare an aqueous solution containing 0.12 g/l of polyethylene glycol (PEG-35), 0.16 g/l dicyandiamide resin (DCU) and and 3.72 g/l polyvinyl acetate dispersion (GOST 18992-80). Next, make a sheet of composite material similar to that described in example 1.

Conduct the measurement limit of the tensile strength for the received composite material according to GOST 17177-87. The results are given in table. 3.

From the data table. 3 shows that the inventive material has better mechanical properties in comparison with known material.

Example 4.

To justify the ranges of concentrations of components in the composition of the inventive composite material is made of a sheet of composite material similar to that described in example 1. Use aqueous solutions containing variable amounts of polyvinyl acetate dispersions, polyethylene glycol and decentest. The compositions of the aqueous solutions obtained composite materials, as well as the results of measurements of tensile strength tensile received samples according to GOST 17177-87 table. 4.

From the data table. 4, when the content dicyandiamide resin or polyethylene glycol in an amount of less than 0.06 wt. their presence has little effect on the strength of the material. When the total concentration dicyandiamide resin and the polyethylene glycol is more than 0.6. not observed the growth of the strength of the material, while the total amount of organic substances in the composite material increases. Thus, the data presented indicate that the claimed intervals of concentrations of the components of the composite material offers high mechanical properties of the inventive material.

1. Composite material containing basalt fiber and polyvinyl acetate binder, characterized in that it further comprises dicyandiamide resin and/or glycol in the following ratio, wt.

Polyvinyl acetate binder 3,8 5,0

Dilantininformation resin and/or has the following composition components, wt.

Polyvinyl acetate binder 3,8 5,0

The glycol 0,06 0,25

Basalt fiber Rest

3. The material under item 1, characterized in that it has the following composition, wt.

Polyvinyl acetate binder 3,8 5,0

Dilantininformation resin 0,06 0,35

Basalt fiber Rest

4. The material under item 1, characterized in that it has the following composition, wt.

The glycol 0.05 to 0.25

Polyvinyl acetate binder 3,8 5,0

Dilantininformation resin 0,01 0,35

Basalt fiber Ostalnoe

 

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