Low VOC (volatile organic compounds), solvent-based PVC pipe adhesives which maintain joint adhesive performance
AssigneeIPS Corporation
InventorsNaresh D. Patel, Mark W. Brown
Life of this patent
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AssigneeIPS Corporation
InventorsNaresh D. Patel, Mark W. Brown
Estimating the term…
A PVC adhesive for joining PVC pipes comprises: (a) about 10 to 22 wt % PVC resin and about 2 to 25 wt % acrylic resin, the total of the PVC resin and acrylic resin ranging from about 18 to 35 wt % of said adhesive; (b) a high vapor pressure solvent comprising about 10 to 50 wt % tetrahydrofuran and 0 to about 40 wt % methyl ethyl ketone, with the total high vapor pressure solvent concentration not exceeding a maximum concentration of about 55 wt % of the total adhesive composition; and a low vapor pressure solvent comprising about 10 to 35 wt % cyclohexanone and 0 to about 35 wt % N-methyl pyrrolidone, with the total low vapor pressure solvent concentration at least about 19 wt % of the total adhesive composition. The VOC (volatile organic compound) level of the PVC adhesive composition of the invention is at or below the allowed maximum value of 450 g/l, yet the adhesive meets or exceeds required performance standards, such as lap shear strength.
A polyvinyl chloride (PVC) adhesive for joining PVC pipes consisting essentially of:
A method for reducing volatile organic compound emissions from polyvinyl chloride (PVC) pipe adhesives, wherein said adhesive is formulated by combining
Dependencies are inferred from the claim text.