Coal tar containing foaming urethane composition and a method fo

Details Coal tar containing foaming urethane composition and a method fo Coal tar containing foaming urethane composition and a method fo

1985-06-25

1987-04-28

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

238370, 238371, 264 36, 521170, 521174, 521175, 521176, 528 76, 528 78, C08G 1814

Patent

active

046615326

ABSTRACT:
Hydrophobic polyurethane compositions can be used to repair or fill-in surface defects in structural components. The hydrophobic composition can be packaged in two parts, a hydrophobic polyol part and a isocyanate part wherein the polyol part comprises a polyol and a coal tar or pitch composition and the isocyanate part comprises a reactive isocyanate compound. The parts of the composition can be mixed and applied to surface defects of structural members such as railroad ties and can rapidly form a hard, permanent, strongly bonded repair.

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