Cleaning composition for removing reactive polyurethane hot melt adhesives
AssigneeH. B. Fuller Licensing & Financing, Inc.
InventorFranz Maitz
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Abstract
A cleaning compound for removing reactive polyurethane (PUR) hot melt adhesives from production and processing devices, machines and equipment which includes at least one reactive monofunctional hydroxyl compound which can react with the reactive isocyanate groups of the hot melt adhesive. The monohydroxy functional compound of the invention's cleaning compound completely saturates the remaining NCO groups of the hot melt adhesive to be removed, converting the adhesive into non-reactive, meltable compounds which are soluble in the cleaning compound.
Claims12
A cleaning composition for removing reactive polyurethane (PUR) hot melt adhesives having reactive isocyanate (NCO) groups therein from production and processing devices, machines and equipment, said cleaning composition consisting essentially of at least one monofunctional hydroxyl containing compound selected from the group consisting of hydroxy functional ether or alcohol compounds which can react with the reactive isocyanate groups of the hot melt adhesive when applied to a substrate to be cleaned, said monofunctional hydroxyl containing compound being the sole compound of the composition capable of reacting with the NCO groups and a plastically deformable material which in conditions of use in removing reactive polyurethane (PUR) hot melt adhesives from production and processing devices, machines and equipment, does not react with the isocyanate groups of the PUR hot melt adhesive.
Dependencies are inferred from the claim text.