Bituminous compositions containing residues of hydrolyzed or alc

Details Bituminous compositions containing residues of hydrolyzed or alc Bituminous compositions containing residues of hydrolyzed or alc

1991-02-21

1992-04-14

Ziegler, Jacob

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

Synthetic resins

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

525408, 525454, C08G 6391

Patent

active

051049325

ABSTRACT:
The invention relates to bituminous compositions containing residues of polymers and in particular sterile car waste, which have previously undergone a hydrolysis and/or alcoholysis treatment prior to their incorporation into the bitumen or asphalt. The treatment is carried out in such a way as to hydrolyze and/or alcoholyze at least 5% by weight of the polyesters and/or polyurethanes initially contained in the polymer residues.
During the addition of the pretreated mixture of polymers to the bitumen or asphalt, it is preferable to add a catalyst and/or a reagent assisting the in situ condensation of the acids, alcohols, amines or isocyanates formed during the pretreatment and which react with one another or with certain constituents of the bitumen or asphalt.
The process permits a better incorporation of the polymer residues containing a fraction of polyurethane, polyester and/or polyepoxide resins and consequently makes it possible to obtain improved bituminous compositions for use in roads or industry.

REFERENCES:
patent: 4677146 (1987-06-01), Senz
patent: 4724245 (1988-02-01), Lalanne et al.

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