Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1992-12-11
1994-03-01
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
25218221, 264 454, 264DIG7, 521 57, 521137, 521160, C08J 9224, C08J 9236
Patent
active
052908186
ABSTRACT:
Rebond polyurethane foams can be prepared by coating shredded polyurethane foam with a prepolymer binder formulation which includes toluene diisocyanate distillation bottoms, compressing the binder coated foam, and the curing the binder with steam. The toluene diisocyanate distillation bottoms can be used in place of more expensive prepolymer formulation components such as toluene diisocyanate or methylene diphenyldiisocyanate. The toluene diisocyanate distillation bottoms can also improve elongation and tear resistance properties of the resultant rebond foams prepared therewith.
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Koehler Charles E.
Lowenkron Steven B.
Nafziger John L.
Stevens Bruce N.
Foelak Morton
The Dow Chemical Company
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