Foam separator for polyurethane foams
AssigneeBASF SE
InventorMathias WEICKERT
Life of this patent
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Abstract
A process can be used for preparing thermally insulating articles containing a thermally insulating polyurethane foam producible in place, a casing surrounding the thermally insulating polyurethane foam, and a foam separator located within the thermally insulating polyurethane foam. The thermally insulating articles producible according to this process are useful. Corresponding cooling systems like fridges, heat storage systems, insulation panels for construction, insulated pipes, mobile transport systems, water boilers, burners, chimneys, instrument panels, roofs of industry hails, engines, or caravans contain the thermally insulating article.
Claims21
1-18. (canceled)
A process for preparing a thermally insulating article, the process comprising:
- injecting a polyurethane foam reaction mixture into at least one first inlet of a casing, and
- foaming the polyurethane foam reaction mixture;
- wherein the thermally insulating article comprises:
- a thermally insulating polyurethane foam producible in place by foaming a foam reaction mixture, and
- the casing surrounding the thermally insulating polyurethane foam, said casing comprising
- the at least one first inlet for the injection of the polyurethane foam reaction mixture,
- at least one air outlet for air displaced during the foaming of the polyurethane foam reaction mixture, and
- at least one foam separator;
- wherein during the injection and/or foaming, at least two streams of the polyurethane foam reaction mixture converge within the casing,
- wherein the at least one foam separator is provided along an area of convergence of the at least two streams, and
- wherein the area of convergence means an area where the at least two streams of the polyurethane foam reaction mixture would meet and converge in case there would be no foam separator.
A thermally insulating article, comprising:
- an in-place-foamed thermally insulating polyurethane foam, and
- a casing surrounding the in-place-foamed thermally insulating polyurethane foam, said casing comprising
- at least one inlet for injection of a polyurethane foam reaction mixture for in-place-foaming the thermally insulating polyurethane foam,
- at least one air outlet for air displaced during the in-place-foaming of the thermally insulating polyurethane foam, and
- at least one foam separator;
- wherein the at least one foam separator is located within the in-place-foamed thermally insulating polyurethane foam along an area of convergence of at least two streams of the polyurethane foam reaction mixture during the in-place-foaming of the thermally insulating polyurethane foam, and
- wherein the area of convergence means an area where the at least two streams of the polyurethane foam reaction mixture would meet and converge in case there would be no foam separator.
Dependencies are inferred from the claim text.