Method of manufacturing fire retardant polystyrene insulating bo

Details Method of manufacturing fire retardant polystyrene insulating bo Method of manufacturing fire retardant polystyrene insulating bo

1984-05-11

1986-06-24

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 453, 264 465, 264 51, 264101, 264109, 264DIG2, 264DIG7, C08J 922, B29C 3512

Patent

active

045966826

ABSTRACT:
Fire retardant polystyrene insulating material is manufactured from expandable polystyrene beads in admixture with a phenol-formaldehyde or melamine-formaldehyde resin in resole form, the resin containing a blowing agent and a surfactant. The insulating material is formed from the bead-resin mix by applying dielectric heating to foam the resin, expand the beads, and cure the foamed resin to a closed cell structure.

REFERENCES:
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patent: 3251916 (1966-05-01), Newnaam et al.
patent: 3345442 (1967-10-01), Oxel
patent: 3577363 (1971-05-01), Klug
patent: 3640787 (1972-02-01), Heller
patent: 3661810 (1972-05-01), Gahmig
patent: 4079170 (1978-03-01), Cluff
patent: 4243717 (1981-01-01), Gahmig
patent: 4256803 (1981-03-01), Savey et al.
patent: 4369227 (1983-01-01), Hahn et al.

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