One-package structural adhesive

Details One-package structural adhesive One-package structural adhesive

1993-12-21

1995-11-21

Seidleck, James J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 59, 528 61, 528 62, 528 65, 528 85, 528905, 4284237, C08G 1800

Patent

active

054688310

ABSTRACT:
A one-package primerless structural adhesive is disclosed that is particularly well suited for adhering one or more substrates of fiber-reinforced plastics. This adhesive uses dicyandiamide, its substituted derivatives, or melamine as the principal curative. A polyisocyanate prepolymer is made from various polyols reacted with polyisocyanates. In the absence of moisture, the curative and polyisocyanate can coexist in a single package without reacting for periods of time in excess of four months. Upon heating the adhesive to 150.degree. C., it cures in about five minutes or less, forming an initial structural bond that after heat aging is often stronger than the cohesive strength of the fiber reinforced substrate.

REFERENCES:
patent: 3645924 (1972-02-01), Woiciech
patent: 3726835 (1973-04-01), Bertozzi
patent: 3734868 (1973-05-01), Uelzmann et al.
patent: 3740377 (1973-06-01), Huffman et al.
patent: 3864313 (1975-02-01), Susman
patent: 4876308 (1989-10-01), Melby et al.
patent: 5175228 (1992-12-01), Wang et al.
A World Patent Index computer based search from 1966-1992 comprising 21 entries.
A Chem. Abst. search from 1967-May 1991 limited to English and German on One Componet/Package Adhesives comprising 18 entries+40 entries+7 entries of 17 possible entries+3 entries+10 entires+6 entries+25 entries.

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