Fume duct circumferential joint sealant

Details Fume duct circumferential joint sealant Fume duct circumferential joint sealant

1995-03-31

1996-08-27

Marquis, Melvyn I.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 3691, 428413, 428414, 156330, B32B 108, F16L 9127

Patent

active

055499490

ABSTRACT:
Sealant compositions for sealing the circumferential joint between pairs of dual-laiminate fume duct sections, and a joint sealing method enabling strong bonding between the sealant and phenolic/glass and vinyl ester surfaces without sanding mating surfaces. A first preferred sealant consists of a resin including by weight: 20.0% Epon 862 novolac epoxy resin; 30.0% SU-2.5 Epon novolac epoxy resin; 20.0% Heloxy 48; 19.5% Epon 826 bisphenol A resin; 10.0% Heloxy 505; and 0.5% silane, and a hardener including: two cycloaliphatic amines, 94.0%; and an aromatic tertiary amine, 6.0%. A second preferred sealant consists of a resin including by weight: 39.5% aromatic epoxide resin; 40.0% Heloxy 48; 20.0% SU-2.5 Epon novolac epoxy resin; and 0.5% silane, and a hardener including: two cycloaliphatic amines, 94.0%; an aromatic tertiary amine, 5.5%; and an amino silane, 0.5%.

REFERENCES:
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patent: 5202189 (1993-04-01), Shea
patent: 5298299 (1994-03-01), Shea
H. Lee & K. Neville, Handbook of Epoxy Resins, March, 1967 pp. 7-2, 8-2, 13-1, 13-9, 13-16, 24-6.

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