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US 2021/0230865 A1Published application
Double faced medium density polyiso board
AssigneeJohns Manville
InventorsDiana Fisler, Ralph Michael Fay, Stanislav Kukatin
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Abstract
A polyiso foam wall board includes a polyisocyanurate foam core produced from an isocyanate and a polyol. The wall board also includes a facer material applied to an outer surface of the polyisocyanurate foam core and an intumescent coating applied to the facer material.
Claims13
A polyiso foam wall board, comprising:
- a polyisocyanurate foam core produced from:
- an isocyanate;
- and
- a polyol;
- a facer material applied to an outer surface of the polyisocyanurate foam core;
- and
- an intumescent coating applied to the facer material, wherein the intumescent coaling comprises limestone, perlite, and talc, wherein:
- an amount of the limestone is at least about 30% by weight;
- an amount of the perlite is less than about 8% by weight;
- and
- an amount of the talc is less than about 8% by weight.
8 more elements
(canceled)
-20. (canceled)
Dependencies are inferred from the claim text.