SU929667A1 - Rubber stock based on vinylsiloxane rubber - Google Patents

Description

(5) RUBBER MIXTURE BASED ON VINYL SILOXANE RUBBER

i

The invention relates to the rubber industry, in particular the production of rubber mixtures based on vinyl siloxane rubber, which have an increased resistance to burning, and can be used to process the working clothes of welding professions and metallurgists.

Known rubber mixture. Based on vinylsiloxane rubber, white carbon black, aerosil, zinc oxide and dihydroxydimethylsiloxane BUT (CH3), where n 2-8 P.

This rubber mixture can be used to obtain elastomeric coatings of artificial leather, but coatings based on it have a low resistance to burning.

The purpose of the invention is to increase the resistance of coatings based on it to burning.

This goal is achieved by the fact that, according to the method, a rubber mixture based on vinylsilox NOVO rubber, white carbon black, aerosil, zinc oxide and dihydroxydimethylsiloxane of the formula HO-E (CHi,), where it additionally contains d. , ix) bis- (methacryloyloxy ethylene carbonate) diethylene glycol (OKM-2) with the following content of components, wt.h .: Zinylsiloxane ka100 chuk

3-7

Bela soot

iiO-50

10 Aerosil

3-7 Zinc Oxide Dihydroxydimethyl8-12

siloxane

с1, .с- (MetacryloIS

iloxyethylene carbonate)

3-7

diethylene glycol

As vinylsiloxane rubber can be used methylvinylsiloxane rubber SKVT-1

20 or its mixture with methylphenylvinylsiloxane SKTFV-ZOZ rubber at a ratio of 90-70: 10-30, respectively.

Dl, and -bis- (methacryloyloxyethylene carbonate) diethylene glycol has the following characteristics according to TU-6-03-22-65-77:

Bromine number g

Вг (г83,2

General content

chlorine, O.O.

Iron content,% 0.0005

Burnability, s (PPT-i device, t ° 8000C, droplet diameter 7.5 mm)

Shore hardness (scale A)

Tensile strength at break,

kgf / cm

-

ND-8 - dihydroxypolymethylsiloxane

In tab. 2 shows the effect of white carbon black content U-333 on properties

296674

The rubber mixture is prepared in the usual way. The coatings applied to the artificial skin, under the influence of γ rays from the Co isotope, were absorbed at a 5 absorbed dose of 7 Mrad and a dose rate of 1 Mrad / h.

In tab. Figure 1 shows the effect of Aerosil A-175 content on the properties of rubber compounds based on methylvitO nilsiloxane rubber SKTV-G.

Table 1

27.0 27.04 27.04 27.04 27.04

65

55

50

70

40.0 60.0 50.0

20.0 35.0

rubber mixtures based on methylvinyl silica of the new rubber SKTV-1.

Table 2 . Needle bad, good, flagellum surface crumbly flagellum smooth Ability to Not More Not valvalevaniyu, minute two mines, tsatsya, forms a mixture with gnadho shreds skin

In tab. 5 shows the physico-mechanical indicators and burnability.

Is bad. surface of flagellum uneven. its deformation is observed

Does not roll, mixture sticks.

samples based on methylvinylsiloxane rubber. 59296676 In the table. 3 shows the effect of methyl vinyl oxide-based zinc oxide mixtures on the properties of the rubber-oxane rubber SKTV-1. -Ch -------- -------- --- -. Known is a mixture of SCTV-1100.0 pK-69A-175 “B, O Indicators TU-38-103- U-3335.0 -206-76 ND-810.0 Burning capacity, s - 27.0 27.O. 27.0 27.0 27. Karrerru plasticity, 55-0.68 O, 19 0.55 0.61 0.68 0.7 Tab. k shows the effect of me-based content-rubber mixtures. dihydroxypolymethylsilox- (tilvinylsiloxane rubber on (product ND-8) on the properties of SKTV-1, - - --.--. - - "" -, vvvvvv "" The composition of the proposed mixture, May .h. Known,. „, - ,, ,,,,“ gmrgk K-Ach SKTVV-1 100.0 mixture k-from., -, .- tf p TU-38-103- - 5 ° J. n Indicators - 206-76. C O With the content of zinc oxide, wt.h. 7.0 8.0 1 10.0 1 12.0 I 13.0 burning, s - 2710 h 27.0 27. 27.0 27, O Table 3 The composition of the proposed mixture, nas OKM-25.0 With a zinc oxide content of about 2.0 1 3.0 j 5.0 1 7.0 J 8.0 Table OKM-2 5.0 Good, the surface of the flagellum is smooth. The time of formation of a smooth skin is no more than two minutes. n

Table 5

Claims (1)

Claim A rubber mixture based on vinyl siloxane rubber, carbon black, aerosil, zinc oxide and methylhydroxitite45 methylsiloxane of the formula HOfiCH ^ iO} H,. where η = 2-8, characterized in that, in order to increase the resistance of the coatings based on it to burning, it is additional. 50 completely contains c £, and> -bis- (methacryloyloxyethyl encarbonate) diethylene glycol in the following components, wt.h .: Vinylsiloxane rubber 100 White soot 3-7 Aerosil 40-50 Zinc oxide 3-7 Di hydroxydimethyl ^- siloxane 8-12 s1, c) bis (methacrylo- Iloxyethylene carbonate) diethylene glycol 3-7