Railroad flangeway filler and expansion joint sealer

Details Railroad flangeway filler and expansion joint sealer Railroad flangeway filler and expansion joint sealer

1986-10-27

1989-10-03

Lieberman, Allan M.

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

Synthetic resins

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

521 42, 521 455, 525123, 238 2, 238 8, C08L 700, C08L 900, C08L 7504, E01B 2528

Patent

active

048718092

ABSTRACT:
A flangeway filler and sealing composition suitable for use in a flangeway or expansion joint in a railroad crossing of a roadway surface prepared by the steps of (i) placing cryogenically granulated elastomeric particles in a suitable container; (ii) adding a polyurethane resin to said cryogenically granulated elastomeric particles; (iii) mixing the cryogenically granulated elastomeric particles and the polyurethane resin. The cryogenically granulated elastomeric particles have an average particle size of less than about 3 mm, and the ratio of the cryogenically granulated elastomeric particles to the polyurethane resin is greater than 6 to 1 by weight.

REFERENCES:
patent: 2471043 (1949-05-01), Schenck
patent: 3663469 (1972-05-01), Weissmahr
patent: 3801421 (1974-04-01), Allen et al.
patent: 4038239 (1977-07-01), Coyner et al.
patent: 4332700 (1982-06-01), Munih

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