Preparation of lightweight, insulating and semirigid or rigid el

Details Preparation of lightweight, insulating and semirigid or rigid el Preparation of lightweight, insulating and semirigid or rigid el

1982-04-09

1984-05-29

Czaja, Donald E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

264321, B32B 518

Patent

active

044513100

ABSTRACT:
A process for preparing light-weight, insulating and semi-rigid or rigid elements, essentially comprises impregnating a porous supple material having an internal structure with preferentially open cells, with the desired quantity of a solution of a compound selected from the group comprising isocyanates, and having consequently in its formula at least a --NCO group, the material optionally having the final shape which is to be obtained, then proceeding with reticulation of the compound after reacting it with water giving a derivative of urea or biuret.

REFERENCES:
patent: 3269887 (1966-08-01), Windecker
patent: 3298857 (1967-01-01), Terry
patent: 3944704 (1976-03-01), Dirks

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