Process for preparing bitumen-polymer compositions, application

Details Process for preparing bitumen-polymer compositions, application Process for preparing bitumen-polymer compositions, application

1983-06-09

1985-11-19

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524 62, 524 68, C08F 800

Patent

active

045543135

ABSTRACT:
Bitumen-polymer compositions are prepared, by mixing, at between 130.degree. C. and 230.degree. C., a bitumen with a styrene and conjugated diene copolymer and a sulphur source, the copolymer and the sulphur source being added to the bitumen either directly, or in the form of a mother solution in a hydrocarbon oil, then by maintaining the whole under stirring at between 130.degree. C. and 230.degree. C. for at least fifteen minutes. By way of sulphur source is used 0.005 to 15% by weight, with respect to bitumen, one or several polymeric or not, cyclic or linear polysulphides, and especially ditertiododecyl or dinonyl pentasulphide. The bitumen-polymer compositions obtained can be used for the obtention of superficial road coverings and present a constant quality of its properties.

REFERENCES:
patent: 3988275 (1976-10-01), Satake et al.
patent: 4145322 (1979-03-01), Maldonado

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