RU97113373A

RU97113373A - MIXTURES OF ORGANO-SILANOPOLISULPHANES AND METHOD FOR PREPARING RUBBER MIXTURES CONTAINING THESE MIXTURES

Info

Publication number: RU97113373A
Application number: RU97113373/04A
Authority: RU
Inventors: Герль Удо; Ламбертц Хорст
Original assignee: Дегусса Акциенгезельшафт
Priority date: 1996-07-18
Filing date: 1997-07-18
Publication date: 1999-05-27

Claims

1. Mixtures of organosilane polysulfanes of the general formula
(RO) ₃ Si (CH ₂ ) _x SS _z -S (CH ₂ ) _x Si (OR) ₃ (I) (1)
where R denotes a linear or branched alkyl with 1-8 C-atoms, in particular with 1-3 C-atoms;
x denotes an integer of 1-8;
z denotes a number from 0 to 6,
moreover, the proportion of polysulfans, in which z denotes an integer from 2 to 6, does not exceed in the mixture the proportion of 20 wt. %, and the proportion of polysulfans at z = 0 does not reach the value of 80 wt. %

2. The mixture under item 1, characterized in that the sum of the shares of organosilane polysulfan, in which z = 0 and z = 1, is not less than 80 wt. %, provided that the proportion of the compound in which z = 0 remains below 80%, and the proportion of organosilane polysulfan in which z is an integer from 2 to 6, does not exceed 20% in mixtures.

3. Mixtures according to claim 2, characterized in that the proportions of organosilane polysulfan in the mixtures take the following values:
z = 0 from about 58 to less than 80%,
z = 1 from more than 0 to about 32%, and the sum of these compounds is at least 80%, and z = from 2 to 6 is not more than 20%.

4. The method of obtaining vulcanized sulfur and / or sulfur donors and accelerator (s) rubber compositions containing one or more natural or artificial rubbers, light oxide (silicate) fillers, as well as carbon black and other common components, if necessary, characterized in that rubber (e) component (s), mixtures according to claim 1 or 3, silicate filler and, if necessary, carbon black, as well as, if necessary, a plasticizer, antioxidants and activators are mixed in a rubber mixer, if necessary in a rubber mixer, Banbury, 160 - 200 ^o C for 3-15 minutes in one or several stages, and then at 60 - 120 ^o C add a vulcanizing agent or in the rubber mixer Banbury, or mixing roller, additionally stirred for 2-10 minutes in the specified temperature range then select the finished rubber composition in the form of sheet rubber or in the form of tapes.

5. The method according to p. 4, characterized in that natural fillers (clays, silicon chalk) and / or precipitated silicic acid or silicates in an amount of 10 to 200 parts, preferably 25 to 80 parts per 100 are used as light oxide fillers. parts of the polymer.

6. The method according to p. 4 and 5, characterized in that the used fillers with a specific surface area, determined by the BET method, (according to ISO 5794 / ID) from 1 to 700 m ² / g, and precipitated silicic acid and silicates, in addition , have the number of dibutyl phthalate (according to ASTM D 2414) from 150 to 300 ml / 100 g.

7. The method according to paragraphs. 4-6, characterized in that the mixed with organosilane polysulfane mixtures according to claim 1 and / or the oxide filler previously processed by them is used, and the amount of mixtures used according to claim 1 is from 0.5 to 30 parts per 100 parts of filler.

8. Compositions for a treadmill tread tires with a high proportion of silicic acid, characterized in that they contain from 4 to 10 parts of the mixtures of PP. 1, 2 or 3 in terms of 100 parts of filler.