Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1982-09-20
1983-11-22
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521116, C08J 902
Patent
active
044170017
ABSTRACT:
Low smoke isocyanurate modified polyurethane foams are prepared from polyols and a stoichiometric excess of reactive isocyanates providing an --NCO/--OH index of 1.3-3.0, preferably from 1.6-2.3. Catalysts for the trimerization reaction of the isocyanate to the isocyanurate form are employed. The polyol used in the present invention includes from 5-100% of a digestion product which is prepared by digesting polyalkylene terephthalate residues in organic polyols. The foams produced by the method of the present invention possess unexpected properties in such areas as flame spread, smoke, and low friability. The use of the polyols described above can substantially reduce product cost, allowing the isocyanurate modified polyurethane foams of the present invention to be utilized in commercial applications.
REFERENCES:
patent: 4035313 (1977-07-01), Falkenstein et al.
patent: 4039487 (1977-08-01), Kolakowski et al.
patent: 4115300 (1978-09-01), Chakirof
patent: 4223068 (1980-09-01), Carlstrom et al.
patent: 4233408 (1980-11-01), Satterly et al.
patent: 4251635 (1981-02-01), Stone
patent: 4336341 (1982-06-01), Fujiwara et al.
Isocyanurate Foams: Chemistry, Properties and Processing by N. E. Reymore, Jr., P. S. Carleton, R. A. Kolakowski and A. A. R. Sayigh.
Development of Lower Cost Polyurethane Modified Polyisocyanurate and Rigid Foams by Joseph M. Hughes and John L. Clinton.
Hercules Incorporated Technical Information--Bulletin OR-250A.
Hercules Incorporated Technical data--Bulletin OR-255.
Carlstrom William L.
Stoehr Richard T.
Svoboda Glenn R.
Freeman Chemical Corporation
Phynes Lucille M.
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