SU520371A1 - Method for isolating stereoregular rubbers - Google Patents

Description

(54) METHOD FOR ISOLATION OF STEREOR-CAGULAR RUBBERS 3 The aqueous suspension of rubber from degasser 1 is pumped 4 by pump 4 to degasser 2. This also enters water vapor circulating in degassing-drying system. and separating water (gifts of secondary boiling. The vapors from the separator are injected with high pressure steam into the superheater 7) The aqueous suspension of rubber from the separator 6 iodozota onto the vibrating screen 8, from where the wet rubber is sent to the squeezing machine 9. During the vibrating screen and squeezing machine 9 is collected in eiviKOCTb S, from where it is pumped 3 back to degasser 1, 1 Rubber from the squeezing machine: 9 Saw to a sealed drying machine Us where they dry with steam, containing superheated hydrocarbons in steam superheater 7 ( The steam from the JI dryer is injected into the steam superheater 7, the feed of fresh steam with pressure up to 2O kgf / cm is carried out, the injection chamber after the separator 6 and the dryer 11, and, if necessary, the degasser 2 Rubber from the drying machine for cooling and packaging by known methods. Testing is illustrated by examples of the operation of a hot installation with an output of 10 kg / h of rubber. PRI me R 1. Water degassing of the Civil II pot, the groups are carried out by over-regression: 6 kgf / cm and the temperature is 18 ° C, Drying wet crumbs from gu1sh lead periodically in an airtight weed 1-4. Steam dryer of the same parameter-1 pOBf containing various amounts of hydrocarbons (toluene) at a temperature of t 170 Ca CyMMaj3Hbifl: steam consumption of 15 kg / kg to 1 lucuka. The table shows the main physicomechanical parameters, rubber, noiiy4 i & when using water vapor with a high content of hydrocarbons. ; P and measures 2 "The process of water injection-, laziness rubber SKD P group. Conduct on; npepbiBiibiM by the method described in the above I scheme using orpa-l botanical superheated water vapor after the drying unit for degassing, superheated steam temperature 18O С pressure 6 kgf / cm, temperature-170 ° C, content of carbon; Densities (goluola) in the waste water vapor, 6 weight,% “Consumption of steam 6 - kg / kg of rubber. Below are the axis physic-mechanics | The cus tic indicators of rubber produced by a used water sponge: Voltage three 3OO% nom: elongations {time; -lsh © UH, UH) kgf / cm9O: Strength (average over 10 experiments), kgc / cm 204 Relative elongation,% 552 Remaining elongation,% 6 I Mooney viscosity, units, 42 Weight loss at 105 ° С,% О, О5 The temperature of fragility of the standard BDT + SKD mixture in. . Ili., C-7O

Indicator

, .lS: SCi: r 5Ki3r iiUi ;; -i "r j; i-J4lK jabi" i

For example, macaw lengthening. (time of Vulashiziyazi ZO min), kgf / cm

Irochiosi limit (average for 1-0 zhy tov), kgf / cm

Elongation% Residual Elongation% i Mooney Viscosity,. Weight loss at 105 ° C,%

The fragility temperature of the ci-standard tread mixture BSK + SKD in 1

1: 1. with

ratio

Claims (1)

Invention Formula | The method of separating heat-resistant rubbers from their solutions in hydrocarbon solvents, which is used in the treatment of the solutions with superheated water vapor, followed by a pair of K9n1cene (gjti not eituciKitjf By drying the resulting crumb rubber, which is distinguished by the fact that, with the aim of frost resistance, fire elongation of the rubber and, reducing energy costs, it is used to overheat; and water vapor containing W 0.1 to 2 weight, with hydrocarboniiibix (solvents,. IttMoStlg SuS