METHOD AND DEVICE FOR MAKING MODIFIED RUBBER-BITUMEN PUTTIES Russian patent published in 2014 - IPC C08L95/00 E01C19/08 C09D195/00 E04D15/00 

FIELD: construction.

SUBSTANCE: method includes heating of bitumen to temperature of 90-120°C in a heat insulated reservoir (1), addition of rubber crumb and polyethylene. Besides, rubber crumb is added into the reservoir into bitumen in the amount of 10-20 wt % and mixed, and polyethylene is added into the additional heat insulated tight reservoir (14) in the amount of 1-2 wt % and poured with a self-flowing mixture of bitumen and rubber crumb. Then the produced mix is heated to temperature 130-170°C, and with the help of a gear pump (23) they perform multiple recirculation of the mix via the heat insulated reservoir. The device for preparation of putty comprises the heat insulated reservoir (1) with a heating device (2), a neck (3) and a mixing device (35), a mixing drive (42), a stop valve (12), a drain manifold (11) and pipelines. Besides, between the stop valve (12) and the neck (3) below the reservoir level (1) there is a tight heat insulated additional reservoir (14) with the second heating device (19), to the outlet of the reservoir (14) a recirculation pipeline (25) is connected, as well as a gear pump (23) with a drive (34), the outlet of the pipeline (25) is connected with the neck (3) of the reservoir (1).

EFFECT: reduced cost of putty in case of increased quality and durability of a roof putty coating.

14 cl, 9 dwg, 3 tbl