Bituminous compositions containing linear copolymers

Details Bituminous compositions containing linear copolymers Bituminous compositions containing linear copolymers

1998-01-08

1999-12-28

Szekely, Peter A.

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

060082771

ABSTRACT:
The present invention relates to bituminous compositions used for roofing and waterproofing membranes or material comprising asymmetrical linear polyvinyl aromatic-polydiene block copolymers having improved physical properties over broader ranges of service temperatures than those obtained from bituminous compositions prepared with symmetrical block copolymers of similar type.
The asymmetry of the copolymer which is characterised by polyvinyl aromatic endblocks of at least two different molecular weights, one high and one low, ensures improved physical performance to roofing and waterproofing membranes made from such compositions.

REFERENCES:
patent: 4196115 (1980-04-01), Bresson
patent: 4391949 (1983-07-01), St. Clair
patent: 4530652 (1985-07-01), Buck et al.
patent: 4585816 (1986-04-01), Vitkuske et al.

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