Plastic adhesive
AssigneeOatey Co.
InventorsAmrit Parhar, Forest Hamptom, III, Robert J. Duff
Life of this patent
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Abstract
Macrocyclic compounds, e.g., ketones, crown ethers, methicones etc., have been found to be effective co-solvents in solvent based adhesives for pipe joining applications. Because of their enhanced solubility with VOC exempt solvents (40 C.F.R. 51.100), the calculated VOC content of the adhesive can be lowered to at least 75% of those established by SCAQMD Rule 116A.
Claims17
A solvent cement comprising (a) a corresponding polymer selected from PVC, CPVC and ABS, (b) at least one liquid polar organic solvent, (c) an optional sulfur containing liquid solvent, (d) an optional liquid co-solvent capable of at least partially dissolving or at least swelling the corresponding polymer, (e) an optional additional polymer selected from an acrylic polymer, a vinyl aromatic polymer, a vinyl pyrrolidone polymer, and mixtures thereof, and (f) at least one oxygen and/or nitrogen-containing macrocyclic compound comprising a non-polymeric organic compound, including silicones, containing at least an eight member ring.
A process for bonding PVC, CPVC and ABS plastic pipe and other molded articles to one another, the process comprising applying a solvent cement to the surfaces to be bonded and then bringing these surfaces into contact with one another, wherein the solvent cement comprises (a) a corresponding polymer selected from PVC, CPVC and ABS, (b) at least one liquid polar organic solvent, (c) an optional sulfur containing liquid solvent, (d) an optional liquid co-solvent capable of at least partially dissolving or at least swelling the corresponding polymer, (e) an optional additional polymer selected from an acrylic polymer, a vinyl aromatic polymer, a vinyl pyrrolidone polymer, and mixtures thereof, and (f) at least one oxygen and/or nitrogen-containing macrocyclic compound comprising a non-polymeric organic compound,including silicones, containing at least an eight member ring.
Dependencies are inferred from the claim text.