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Title:
BITUMINOUS POLYURETHANE INTERPENETRATING ELASTOMERIC NETWORK COMPOSITIONS
Document Type and Number:
WIPO Patent Application WO2000011111
Kind Code:
A3
Abstract:
The elastomeric polyurethane interpenetrating network compositions of the invention are developed by in situ reaction of polyols with different isocyanates and polyisocyanates in bituminous material. (2) Suitable bituminous materials include asphalt, coal tar, polymer modified asphalt, oxidized, and unoxidized asphalt. (3) The composition is preferably formed at a temperature between 200 DEG F and 350 DEG F. The reaction kinetics can be accelerated by including catalysts and curing agents. (4) The bituminous polyurethane interpenetrating network elastomeric compositions were hot-sprayed-applied (200 DEG F-350 DEG F) on concrete, metal, wood, built-up roofing systems, polyurethane foams, and other construction materials with a specially designed spray applicator system. (1) The coated substrates were evaluated for their physical and mechanical properties, adhesion, static and dynamic puncture resistance, wind-up lift test, and other properties. Bituminous polyurethane interpenetrating network elastomers are suitable for roofing, new construction, and wall and foundation waterproofing applications (7).

Inventors:
RAJALINGAM PONSWAMY
RAJALINGAM UMARANI
Application Number:
US9918929W
Publication Date:
June 02, 2000
Filing Date:
August 19, 1999
Export Citation:
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Assignee:
URECOATS INTERNATIONAL, INC.
International Classes:
C08G18/64; C08G18/65; C08L75/04; C08L95/00; C09D195/00; C09J195/00; E01C7/26; (IPC1-7): B05D/; C08L/
Foreign References:
US3637558A1972-01-25
US4195009A1980-03-25
US4443578A1984-04-17
BE753865A1971-01-25
JPS4713981B1
GB1323884A1973-07-18
JPS5410337A1979-01-25
JPS61126125A1986-06-13
JPS61174282A1986-08-05
JPS6253371A1987-03-09
EP0219399A11987-04-22
US3645945A1972-02-29
US3835077A1974-09-10
US3880789A1975-04-29
US5077349A1991-12-31
US5045590A1991-09-03
US5714563A1998-02-03
DE2554864A11976-06-16
JPS5698259A1981-08-07
SU587725A11980-01-30
US3179610A1965-04-20
Other References:
See also references of EP 1159082A4
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