Method for making a bonded foam product suitable for use as an underlayment for floor coverings
OwnerStephen Gilderinventor
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Abstract
A pre-polymer comprising: isocyanate, polyol, oil, and an amine catalyst and an associated method for producing a polyurethane bonded foam product. The method comprises: coating a plurality of foam pieces with the pre-polymer; compressing the foam pieces into a foam log of a desired density; and steaming the foam log to cure the pre-polymer. Preferably, the amine catalyst is dimorpholinodiethylether (DMDEE) and the isocyanate, the polyol, and the oil are present in the pre-polymer in about equal amounts.
Claims45
A pre-polymer comprising:
- isocyanate, polyol, oil, and an amine catalyst.
A method for producing a polyurethane foam product comprising:
- coating a plurality of foam pieces with a pre-polymer;
- compressing the foam pieces into a foam log of a desired density;
- steaming the foam log to cure the pre-polymer;
- and
- wherein the pre-polymer comprises isocyanate, polyol, and an amine catalyst.
A method for producing a polyurethane foam product comprising:
- coating a plurality of foam pieces with a pre-polymer;
- compressing the foam pieces into a foam log of a desired density;
- steaming the foam log to cure the pre-polymer;
- wherein the pre-polymer comprises isocyanate, polyol, oil, and a dimorpholinodiethylether (DMDEE) catalyst;
- wherein the pre-polymer contains between about 30 percent, by weight, and about 36 percent, by weight, of the isocyanate, the polyol, and the oil;
- and
- wherein the pre-polymer contains between about 0.5 percent, by weight, and about 5 percent, by weight, of the catalyst.
Dependencies are inferred from the claim text.