SU718463A1 - Vulcanized composition - Google Patents

Description

The invention relates to the field of recycling of worn rubber products, in particular, concerns a company based on shredded rubber waste to obtain elastic materials that can be used in the construction industry to produce plates intended for flooring in agricultural premises for spores. platforms, etc., as well as for the production of various gaskets. A vulcanizable composition is known, including rubber crumb and alkylphenol formaldehyde resin 1. To obtain an elastic material, the mixture is subjected to thermomechanical treatment at a high temperature, which leads to the vulcanization of the mixture, which impedes the process. By reducing the temperature of the thermomechanical processing to the extent precluding scorching, the ductility and physicochemical characteristics of the mixture deteriorate. The aim of the invention is to increase the physicomechanical properties of canisates. This goal is achieved by the fact that a mixture is vulcanized, including rubber crumb and an alkylphenol-formaldehyde resin, df full 1Holo contains an elastic styrene-butadiene block copolymer with the following ratio of components, May. %: Elastic styrene-butadiene block copolymer Alkylphenol-formaldehyde resin Tubular rubber-resin Copolymers of dienes with styrene, for example, butadiene with styrene, are used as an elastic block copolymer. As the alkylphenol-formaldehyde resin, both conventional resins and modified resins, in particular halides, may be used. In tab. 1 in columns 1-6 shows the compositions of known compositions; in columns 7-10, the compositions of the proposed composition.

,,; ,, .., 1 t, -

- - gfaeji. 2 gives a comparison of the physic mech of the first indicators of known and proposed compositions.

To obtain a partial material from the proposed kit, the com is mixed in the indicated relations, for example, in a closed mixer at a temperature exceeding TeMnepjffypy melting of an elastic block polymer and sylug (80-150 ° C) for 8-15 minutes, sheet, for example, on rollers, and vulcanized in the press at 150-20p for 5-15 minutes, depending on the thickness of the product W1 with: -.

:: - C-i, i-.

Resilient materials thus obtained have improved tensile strength, relative elongation at break and el: ти 11 сти сти сти comparing to material), obtained in the same way from known compositions (Table 2).

 The proposed composition significantly enhances the formulation and technological process of producing elastic materials, moreover, it allows to obtain elastic materials from virtually any type of worn vulcanized rubber waste, including 8 non-reusable, known methods.

Table 1

-

w

96

90 95

2. Thermallasts-,, toplast I DST-30 (viscosity characteristic 0.82) 5,010

20

. Bromerope i.

, -, .-- ,,,; - J

, 0 88

90

85

70

Claims (1)

5.0 10.0 10.0 20.0 Tensile strength at break, kgf / cm 68 87 87 45 79 Relative elongation,% 200 140 150 220 230 Residual yield 35% blunt,% 2 Hardness in TM-2, ual. units 55 55 63 45 40 Resilience 33 33 27 28 rebound, 30 Claims A vulcanizable composition comprising crumb rubber and alkyl phenyl form degidny resin, in order to improve the physical and mechanical properties of the vulcanizates obtained on its basis, the composition additionally contains: there is an elastic styrene-butadiene block copolyMbr at the following ratio, and components, May. %: T a b l i c a 2 pr (n 82 111 80 113 101. 80 330 350 370 220 12 7 12 13 14 43 46 50 60 59 31 31 33 30 20 Alkylphenol formaldehyde sm. La;:, 2-10 Elastic butadiene block copolymer 5-20 Rubber crunch Else Sources of information, ntoe taken into account in the examination of 1, USSR Copyright Certificate 57738, C, C 08 F 11/04, 08.16.78 (type).