Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1992-07-17
1993-10-26
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524 68, 524 71, C08L 9500
Patent
active
052567109
ABSTRACT:
A method of producing cross-linked polymer modified asphalt or bitumen. The method includes the steps of combining by agitation polymers chosen from a group consisting of styrene rubber, styrene butadiene rubber, polydiene rubber and polyolefin diene rubber, 80 to 99% by weight of asphalt or bitumen, with the asphalt or bitumen at temperatures of 130.degree. to 230.degree. C. to form a homogeneous mixture. Thereafter, 0.05 to 2.0% by weight of asphalt of a reactive phenol-aldehyde resin is added to the mixture. The reaction is thereafter completed by continuing agitation of the mixture.
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Asphalt Technology & Consultants, Inc.
Michl Paul R.
Szekely Peter
LandOfFree
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