Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1998-11-17
2000-07-18
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
521 485, 521 40, 521 405, 521 41, 528488, 528491, 528499, 528502, C08J 1104
Patent
active
060908602
ABSTRACT:
In one embodiment, the present invention relates to a method of separating a coating from a base plastic in a multilayered structure, comprising the steps of (A) providing the multilayered structure comprising at least a coating and a base plastic; (B) contacting the multilayered structure with a mixture comprising (i) a major amount of water, (ii) at least one basic compound or acid compound, (iii) at least one lifting agent, and (iv) at least one accelerator; and (C) separating the coating from the base plastic. In another embodiment, the present invention relates to a separating composition containing a major amount of water, at least one basic compound or acid compound, at least one lifting agent, and at least one accelerator. The inventive methods and compositions overcome numerous problems in the art by enabling the efficient recycling of coated polymer articles whereby clear and/or colorless recycled polymers may be obtained.
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Brent Randall J.
Peters Donald S.
Asinovsky Olga
Cannoni Ann M.
PPG Industries Ohio Inc.
Seidleck James J.
Stachel Kenneth J.
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