Patent ID: 7097382
Filing Date: 2006-08-29
Classification: E01C

Abstract:
1. Elastic drainage pavement for use on existing pavement comprising a primer layer which is provided on the existing pavement and comprises 10–20% by weight of polypropylene glycol, 5–10% by weight of trimethylol propane, 5–10% by weight of 1,3-butylene glycol, 15–25% by weight of toluene diisocyanate, 49–64.9% by weight of a solvent which is either xylene or methylethylketone and 0.1–1.0% by weight of a defoaming agent; and an elastic drainage layer spread over the primer layer and prepared by mixing waste-polyurethane chips and a binder in the weight ratio of 3:1 to 4:1, the waste-polyurethane chips having the size of 1 to 5 mm, and the binder comprising 50–70% by weight of polypropylene glycol, 5–10% by weight of polybutadiene glycol, 3–5% by weight of 1,3-butylene glycol, 20–30% by weight of methylene diisocyanate and 2–5% by weight of toluene diisocyanate.