Cross-linkable polyolefin composition for formed textured skin applications
AssigneeDow Global Technologies LLC
InventorsTeodora Doneva, Stephen H. Cree
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Abstract
The present invention relates to a flexible polyolefin composition, a sheet made therefrom, and a formed textured skin for applications such as interior furnishings of an automobile and a process to make such composition, sheet, and textured skin. Specifically said composition comprises an extrudable cross-linkable polyolefin composition comprising: (i) from 60 to 75 weight percent of one or more one silane cross-linkable polyolefin polymer; (ii) a moisture-cure condensation catalyst; and (iii) from 25 to 40 weight percent of one or more polyolefin polymer elastomer. Preferably an extruded sheet of said composition is formed into a textured skin, preferably by positive vacuum forming.
Claims8
A process to form a cross-linkable polyolefin composition into a textured skin comprising the steps of:
- a forming an extrudable cross-linkable polyolefin composition consisting of:
- i an amount of from 60 to 75 weight percent of one or more silane cross-linkable polyolefin polymer, weight percent based on the total weight of the cross-linkable polyolefin composition;
- ii a moisture-cure condensation catalyst;
- and
- iii an amount of from 25 to 40 weight percent of one or more polyolefin polymer elastomer, weight percent based on the total weight of the cross-linkable polyolefin composition, wherein the polyolefin polymer elastomer resin has a density of less than or equal to about 0.89 g/cm3 and a melt index, I2, of less than about 50 g/10 min and which has been prepared using at least one metallocene catalyst, wherein said melt index is as measured according to ASTM D-1238, Condition 190° C./2.16 kg;
- b extruding said extrudable cross-linkable polyolefin composition into a sheet comprising the cross-linkable composition, said sheet having a first surface and a second surface;
- c imparting a texture into the first surface of the sheet prior to or during step d;
- and
- d thermoforming or vacuum forming the sheet into a textured skin comprising a cross-linkable composition, said skin having an inside surface and an outside surface (or appearance surface) such that the textured surface of the textured sheet is the appearance surface of the textured skin.
A thermoformed or vacuum formed textured skin made from a composition consisting of:
- a an extrudable cross-linkable polyolefin composition consisting of:
- i an amount of from 60 to 75 weight percent of one or more silane cross-linkable polyolefin polymer, weight percent based on the total weight of the cross-linkable polyolefin composition;
- ii a moisture-cure condensation catalyst;
- and
- iii an amount of from 25 to 40 weight percent of one or more polyolefin polymer elastomer, weight percent based on the total weight of the cross-linkable polyolefin composition, wherein the polyolefin polymer elastomer resin has a density of less than or equal to about 0.89 g/cm3 and a melt index, I2, of less than about 50 g/10 min and which has been prepared using at least one metallocene catalyst, wherein said melt index is as measured according to ASTM D-1238, Condition 190° C./2.16 kg.
Dependencies are inferred from the claim text.