SU410032A1 - - Google Patents

Description

The invention relates to methods for modifying active fillers by treating Chi with a modifying agent for use in the rubber industry.

There is a method of modifying Aerosil with organohalogenesilane.

In order to expand the assortment of papolytes that increase the adhesion of P1e properties of rubber in creatiation of ix to metals, carbon black or aerosil is modified with pairs of 2,4-toluyloidiisoziapata or heated papoliiteli blocked diisocyanates at a temperature above the release temperature.

The presence of carbon blacks on the surface of carbon-containing oxygen-containing groups and, in the case of colloidal creme acid, free hydroxy groups, as well as a high adsorption capacity of dispersed active fillers, allowed instill ia to the surface of the fillers with isocyanate groups.

In the case of modification of carbon black and A-175 aerosol with pairs of 2,4-toluylene diisoacetate, the modification time varies from 30 minutes to 12 hours and depends on the temperature and type of carbon black. The amount of 2,4-toluene diisocyanate, administered

I go to the 1st filler,) is controlled by temperature and modification time and is selected by experience in accordance with the fastening.

PRI and ii e p 1. Soot DG-100 in the amount of 50 g is treated with pairs of 2,4-toluene diisocyanate at a temperature of 180 ° C for

1.5 hours in a thermostat, the soot weight after treatment is 52.7 g. The soot obtained is introduced into a standard rubber resin based on GKH-40 rubber instead of carbon black that has not been treated. Strength of rubber to steel

with glueless mounting reaches 80 kg / cm-.

Example 2. Modification of carbon black DG-100 by thermostatting with blockurethane 50 g of carbon black DG-100 and 5 g of meta-cresolurethane are mixed in a porcelain dish, then thermostatted for an hour at 200 ° C. The bond strength of rezppa on the basis of SKN-40 rubber and modified carbon black with steel with glueless mounting reaches 65 kg / cm.

The use of modifying} of 1 active fillers provides a high bond strength rubber - metal with glueless fastening, and high stability

during aging in water, oils and at elevated temperatures.

Technical,: The logical properties of rubber compounds with modified aggregates do not change 13 for a long period of time.

Mixtures with modified fillers are well treated on rollers, forming a smooth, smooth surface.

Recipes of rubber compounds and physicomechanical nokazateln rubbers with conventional and modified materials and other properties in Table 1 and 2.

Table 1

The subject is invented and

The method of modifying active solubilizing agents, for example, carbon black, silica, by treating it with a modifying agent, is different from that with the aim of reproducing table 2

Recipe

Ziyam high adhesion properties, the active fillers are treated with pairs of 2,4-toluylene diisocyanate or by jointly frying napolpiteli with blocked dizocyanates with temperature above the release temperature.