Aqueous silane coupling agent solution for use as a sealant prim

Details Aqueous silane coupling agent solution for use as a sealant prim Aqueous silane coupling agent solution for use as a sealant prim

1992-06-26

1994-11-15

Nakarani, D. S.

Dispensing

Movable material discharge guide

Foldable, bendable, collapsible or flexible

10628711, 10628716, B67D 300

Patent

active

053639944

ABSTRACT:
An aqueous primer composition for facilitating and promoting good adhesion across an interface between a nonporous substrate and a polymeric coating composition contains from about 0.05 to about 0.3 parts by weight of an amimopropylsilane or a mercaptopropylsilane per 100 parts by weight of water and, optionally to facilitate adhesion under wet conditions, up to about 0.4 parts by weight of a hydrophobic silane per 100 parts by weight of water and aminopropylsilane or mercaptopropylsilane. The primer composition is nontoxic, nonflammable and free or substantially free of any environmentally undesirable volatile organic components. In accordance with a preferred aspect of the invention, the primer composition includes an effective amount of a conventional surfactant sufficient to uniformly wet the surface of the substrate to enable uniform dispersion of the silane coupling agent over the surface. The primer composition is also preferably adjusted to a pH of from about 2.0 to about 5.5 to inhibit condensation or oligomerization of the silane coupling agent and thereby increase the useful shelf-life of the composition.

REFERENCES:
patent: 3779794 (1973-12-01), De Santis
patent: 4173553 (1979-11-01), Haluska
patent: 4388437 (1983-06-01), Ona
patent: 5053081 (1991-10-01), Jacob
patent: 5073195 (1991-12-01), Cuthbert et al.
European Search Report, Application No. 93110139.8, dated 21 Oct. 1993.
Abstract of Japanese Application No. J60203676 from a Derwent Patent Search.
Abstract of Japanese Application No. J04003166 from a Derwent Patent Search.

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