Transparencies produced from epoxy resins cured with adducts of

Details Transparencies produced from epoxy resins cured with adducts of Transparencies produced from epoxy resins cured with adducts of

1981-02-05

1982-08-10

Nielsen, Earl A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

428412, 428414, 528 89, 528 91, 528394, 525506, C08G 5940

Patent

active

043439284

ABSTRACT:
A high heat resistant transparency of epoxy resins cured with adducts of trimethoxyboroxine and benzyl alcohol is disclosed to resist intense heat for these transparencies in their use on military and industrial hardware. Additionally, the transparency may include phosphite or phosphate compounds to improve heat resistance, with the phosphate compound in sufficient concentrations to delay gel times such that the phenyl substituted alkyl alcohol may be eliminated from the composition. This transparency may exist in a composite with other layers of transparent material known to those skilled in the art. The epoxy transparency layer is bound to the other transparent layers, in a variety of configurations, using an interlayer of mercaptan terminated resins. These resins greatly improve resistance to moisture permeability in and about the edges of the entire transparency.

REFERENCES:
patent: 2953545 (1960-09-01), Finestone
patent: 3269853 (1966-08-01), English et al.
patent: 3637591 (1972-01-01), Coran
patent: 4294886 (1981-10-01), Uram

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