Extrudable poly(propylene) compositions
AssigneesInternational Business Machines Corporation, Subsea 7 (US) LLC
InventorsJeannette M. Garcia, Alireza Rahimi, Robert D. Allen, John Hobbs, Michael Firmian
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Abstract
Extrudable compositions were prepared comprising poly(propylene) and a liquid additive comprising a lactam group. The compositions can comprise other optional additives that include a polyhemiaminal, antioxidants, UV light absorbers, and surfactants. The extruded compositions have higher percent elongation at break and lower Young's modulus compared to extruded poly(propylene) lacking the liquid additive. These and other property improvements make the extruded compositions attractive for forming field joint coatings for undersea pipeline applications.
Claims26
A composition, comprising:
- between 85 wt% and 95 wt% of poly(propylene);
- and
- between 15 wt% and 5 wt% of a liquid additive in contact with the poly(propylene), the liquid additive being a compound of formula (1):
- wherein
- n is a positive integer having a value of 2 to 6,
- R′ is a monovalent C1-C7 alkyl or cycloalkyl group,
- each Ra is an independent monovalent radical selected from the group consisting of hydrogen and C1-C10 alkyl groups, and
- each Rb is an independent monovalent radical selected from the group consisting of hydrogen, and C1-C10 alkyl groups;
- wherein
- wt % is based on total weight of the composition.
Dependencies are inferred from the claim text.