Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1985-01-16
1986-03-11
Cockeram, Herbert S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521108, 521129, 521167, 521175, 521176, C08G 1814, C08G 1876, C08G 1848
Patent
active
045755205
ABSTRACT:
Rigid, closed-cell, flame-resistant polyurethane foams are produced by reacting a polyol mixture with a polyphenyl-polymethylene-polyisocyanate in the present of a catalyst system. The polyol mixture includes: (1) from 25 to 43 wt % flame proofing agent, (2) from 5 to 50 wt % sucrose polyether having an OH number of from 350 to 550, (3) from 0 to 30 wt % amine initiated polyethers having an OH number of from 400 to 800, (4) from 0 to 30 wt % other polyether or polyester having an OH number of from 150 to 600, (5) from 4 to 13 wt % glycerol, (6) from 0.5 to 3 wt % silicone stabilizer and (7) from 0.05 to 1.5 wt % water. The catalyst system is made up of at least two components selected from tertiary amines, alkali metal carboxylates, quaternary ammonium carboxylates and organic tin compounds. The reactants are employed in quantities such that the NCO to OH equivalent ratio is from 1.07 to 1.45 (the isocyanate-index is from 1.07 to 1.45). The foams of the present invention are particularly useful in the production of roof insulating boards, insulation of containers, pipelines, etc. and for sealing and insulating roofs and walls.
REFERENCES:
patent: 3072582 (1963-01-01), Frost
patent: 3723365 (1973-03-01), Speranza et al.
patent: 3783133 (1974-01-01), Speranza
patent: 3933690 (1976-01-01), D'Alelio et al.
patent: 4111828 (1978-09-01), Wang
patent: 4216296 (1980-08-01), Wernsing
Adam Norbert
Kapps Manfred
Weigand Eckehard
Wiedermann Rolf
Bayer Aktiengesellschaft
Cockeram Herbert S.
Gil Joseph C.
Harsh Gene
Walen Lyndanne M.
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