Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1982-02-01
1983-10-25
Cockeram, H. S.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
156 78, 156 79, 252182, 427244, 427373, 4283179, 4284228, 521117, 521124, 521902, 521131, 264 464, 264 458, C08G 1814, B32B 326, B32B 3114, B29C 2300
Patent
active
044119496
ABSTRACT:
Cellular foams, particularly polyisocyanurate foams, are prepared by reacting together an organic polyisocyanate, a blowing agent, a trimerization catalyst, and a minor amount of a polyol mixture prepared by the transesterification with a glycol of a by-product fraction from the manufacture of dimethyl terephthalate, the major portion of said fraction comprising about 15 to 70 weight percent of dimethyl terephthalate, and about 85 to 30 weight percent of a mixture of monomethyl terephthalate, bi-ring esters and polymeric materials. Laminates of such foams exhibit a high degree of fire resistance, low smoke evolution on combustion, low foam friability and high compressive strength.
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DMT-HBR (Preliminary Information), E. I. DuPont de Nemours & Co., Inc., Petrochemicals Department Discloses a High Boiling Fraction from the Manufacture of Dimethyl Terephthalate.
Hercules Inc., Bulletin OR-245, 245B (Wilmington, Delaware).
DeLeon Alberto
Snider Scott C.
Cockeram H. S.
Grace James W.
The Celotex Corporation
Vanecek Charles W.
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