METHOD OF PROCESSING POLYMER WASTES Russian patent published in 2012 - IPC B29B7/88 C08L95/00 C08J11/04 B29B17/00 C08J3/22 

FIELD: process engineering.

SUBSTANCE: invention relates to processing of polymer wastes, particularly, resulted from production of butadiene-styrene thermoplastic resins to produce polymer modifiers of polymer-bitumen compositions. Proposed method comprises crushing and softening grit for butadiene-styrene resin wastes ay mixing equipment, ageing said mix for, at least 6 h, and adding target additives. Bitumen BND and crushed wastes of butadiene-styrene resin are loaded into roll arrangement for processing at 5-10 min. Thereafter, they are unloaded and cooled. Petroleum oil is fed into rotary mixer that contains aromatic hydrocarbons in amount of, at least 35% as well as crushed wastes of butadiene-styrene resin to be processed therein at 30-60°C for 5-10 min, unloaded and cooled down. In compliance with this invention, method is used to produce polymer modifying additives (Polycrosh PMD) for bitumen resins, polymer-bitumen compositions for roofing, road repair, etc.

EFFECT: optimum processing of polymer wastes, better performances of bitumen resins.

3 cl, 1 tbl, 6 ex