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US 11,441,009 B2Granted
Flexible polyvinyl halide used for injection over-molding
AssigneeGEON Performance Solutions, LLC
InventorsSang Lee, Ling Hu, Craig L. Shoemaker, Robert Schilling
Life of this patent
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Abstract
A polyvinyl halide compound, alone or alloyed with thermoplastic polyurethane, is used as a flexible layer for over-molding a rigid polymer substrate. Selection of types and amounts of calcium carbonate for the overmolding layer improves peel strength to achieve cohesive failure of the flexible overmolding layer rather than adhesive failure of the interface between the flexible overmolding layer and the rigid polymer substrate.
Claims38
A polymer compound, comprising:
- polyvinyl halide having an inherent viscosity of less than about 0.9, as measured by using 0.2 grams of resin in 100 ml of cyclohexanone at 30° C. according to test method ASTM D 1243;
- an effective amount of plasticizer to provide a desired amount of flexibility to the polyvinyl halide and form a plasticized polyvinyl halide compound;
- and
- stearic acid-treated calcium carbonate fillers, or silane-treated calcium carbonate fillers, or both stearic acid-treated calcium carbonate fillers and silane-treated calcium carbonate fillers dispersed in the plasticized polyvinyl halide compound;
- wherein, when the plasticized polyvinyl halide compound is overmolded as a layer on to a Rigid PVC Test Substrate and undergoes a Modified ASTM D903 Adhesion Peel Strength Test, the layer of plasticized polyvinyl halide compound experiences cohesive failure;
- and
- wherein the plasticizer is present in an amount of at least about 20 weight parts per hundred weight parts of polyvinyl halide.
4 more elements
A composition comprising:
- polyvinyl halide;
- and
- a plasticizer;
- wherein, when the composition is overmolded as a layer on to a Rigid PVC Test Substrate and undergoes a Modified ASTM D903 Adhesion Peel Strength Test, the layer experiences cohesive failure;
- and
- wherein the plasticizer is present in an amount of at least about 20 weight parts per hundred weight parts of polyvinyl halide.
3 more elements
A composition, comprising:
- polyvinyl halide having an inherent viscosity of less than 0.9, as measured by using 0.2 grams of resin in 100 ml of cyclohexanone at 30° C. according to test method ASTM D 1243;
- plasticizer;
- and
- calcium carbonate present in an amount of from 64 weight parts to 150 weight parts per 100 weight parts of the polyvinyl halide;
- wherein the plasticizer is present in an amount of at least about 20 weight parts per hundred weight parts of polyvinyl halide.
2 more elements
An article, comprising:
- a layer comprising polyvinyl halide and plasticizer;
- and
- a rigid substrate comprising polyvinyl halide, the rigid substrate in contact with the layer comprising the polyvinyl halide and the plasticizer;
- wherein, when a peel force is applied to the layer, the layer experiences cohesive failure before being peeled away from the rigid substrate.
1 more element
Dependencies are inferred from the claim text.