Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2005-01-04
2005-01-04
Lorengo, J. A. (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S072000, C156S247000, C156S345420, C428S085000, C428S095000, C428S096000, C521S049000, C521S049500, C524S589000, C525S454000
Reexamination Certificate
active
06837950
ABSTRACT:
The invention relates to methods for processing floor coverings (100), such as carpet and/or carpet tile, having at least one layer containing a polyurethane (104), such that at least this polyurethane—containing layer (104) can be recycled and reused. The method involves contacting the floor covering (100) with an organic polyol (110) and heating (120) it, so that the polyurethane—containing layer (104) softens and/or partially liquefies, but can be resolidified by contact with additional polyisocyanate (140).
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Gray Bruce D.
Interface, Inc.
Lorengo J. A.
Pratt John S.
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