Water-based thermoforming adhesives

Details Water-based thermoforming adhesives Water-based thermoforming adhesives

1987-05-05

1988-08-09

Kight, John

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524873, C08G 1830

Patent

active

047628804

ABSTRACT:
This invention presents new water-based adhesives suitable for use in thermoforming lamination systems. More particularly, this invention presents water-based adhesive-forming compositions comprising an aromatic polyurethane in water dispersion or emulsion and a compatible cross-linking agent; also includable in the compositions are thickening agents and pigments. These new adhesives, it has been found, exhibit bonding strengths and temperature resistance far superior to the solvent and water-based adhesives currently used in industrial applications, and are useful in thermoforming lamination processes. Also disclosed is a one-step thermoform lamination edge-folding process using the adhesive.

REFERENCES:
patent: 3948708 (1976-04-01), Doerer
patent: 4084996 (1978-04-01), Wheeler
patent: 4225372 (1980-09-01), Kinzler
patent: 4465534 (1984-08-01), Zelkowtiz
patent: 4465537 (1984-08-01), Coleman
patent: 4507413 (1985-03-01), Thoma et al.
patent: 4526828 (1985-07-01), Fogt et al.
patent: 4543144 (1985-09-01), Thoma et al.
patent: 4643785 (1987-02-01), Paynton

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