Method of making flame resistant polyimide foam insulation and t

Details Method of making flame resistant polyimide foam insulation and t Method of making flame resistant polyimide foam insulation and t

1988-03-17

1989-10-17

Dawson, Robert A.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

156188, 156212, 156245, 156289, 1563073, 1563311, 1563315, 156 78, 264137, 264321, 428 365, 428 3691, 4283142, 4283166, B32B 108, B32B 110

Patent

active

048746487

ABSTRACT:
A method of making high efficiency, flame resistant polyimide foam insulation particularly suitable for insulating plastic pipes and forming ducts. Typically a sheet of polyimide foam which has been foamed unconstrained is placed between opposed caul plates, squeezed to a thickness less than the original thickness and heated to stabilize the new sheet thickness. Face sheets coated with a polyimide adhesive can then be placed against the stabilized foam faces and heated between plates to bond the face sheets to the foam. Also, a sheet of foam which had been impregnated with polyimide resin precursor can be placed against the stabilized sheet and the resin precursor simultaneously cured and the sheet bonded to the stabilized foam. A variety of flat, tubular or other shapes can be made by this method. The resulting insulation panels, tubes or the like have greatly improved flame resistance and excellent thermal insulation characteristics.

REFERENCES:
patent: 4439381 (1984-03-01), Gagliani et al.
patent: 4621015 (1986-11-01), Long et al.
patent: 4647597 (1987-03-01), Shulman et al.
patent: 4780167 (1988-10-01), Hill

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