Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-11-09
1979-03-06
Bleutge, John C.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 9, 260 173, 260 294R, 252312, 260 37N, 428321, 428425, 521137, 521159, 528 59, 528 76, B32B 1312, C08G 1876
Patent
active
041430140
ABSTRACT:
Storage stable aqueous solutions derived from polymethylene polyphenyl polyisocyanates are described, which solutions are useful as sealant coating compositions for wood and other substrates and, in the form of emulsions with polyisocyanates, as improved particle board binders. The storage stable aqueous solutions are obtained by admixing polymethylene polyphenyl polyisocyanates with less than a stoichiometric amount of a polyethylene glycol (MW 600 to 3000) or polypropylene glycol tipped with 15 to 85 percent ethylene oxide (MW 1000 to 3500) and, within a short time of completing the admixture but during the period where said mixture is completely soluble in water, dissolving said mixture in water. Optionally, a difunctional extender is added to the resulting solution in amount less than that required to react with all the isocyanate groups.
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patent: 3763070 (1973-10-01), Shearing
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McLaughlin Alexander
Reymore, Jr. Harold E.
Richter Reinhard H.
Bleutge John C.
Firth Denis A.
Kekich John
Koeckert Arthur H.
The Upjohn Company
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