Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1985-02-21
1986-01-28
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524481, 524484, 524486, 404 17, 404 32, 525 545, C08K 501
Patent
active
045672229
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: 3541032 (1970-11-01), Pampus et al.
patent: 3676166 (1972-07-01), Louthan
patent: 4001167 (1977-01-01), Tungseth et al.
Hagenbach Germain
Maldonado Paul
Maurice Jacques
ELF France
Marquis Melvyn I.
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