Modified bitumens, processes for their preparation, their use an

Details Modified bitumens, processes for their preparation, their use an Modified bitumens, processes for their preparation, their use an

1993-08-04

1994-11-01

Szekely, Peter

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C08L 9500

Patent

active

053608488

ABSTRACT:
Modified bitumens, processes for their preparation, their use and solubilizing agents for plasticized polyvinyl butyral in bitumen.
Preparation of modified bitumens having improved elasticity properties and an improved low-temperature flexibility by homogeneous mixing of plasticized polyvinyl butyral (PVB) into molten bitumen at 150.degree. to 300.degree. C., simultaneously using mono-, oligo- or polyalkylene glycol dialkyl ethers as solubilizing agents, if appropriate in combination with polystyrene as solubilizing co-component. Process for the preparation of the modified bitumens and possible uses thereof in industrial fields in which bitumens elasticized by conventional methods have hitherto been employed or required.

REFERENCES:
patent: 3332799 (1967-07-01), Parker
patent: 4235953 (1980-11-01), Kumins et al.

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