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US 4,041,103 AGranted
Blends of certain hydrogenated block copolymers
AssigneeShell Oil Company
InventorsSol Davison, William P. Gergen
Life of this patent
Estimating the term…
Abstract
Polymeric blends, covering the range from rubber-like to flexible mechanical behavior, having outstanding resistance to shrinkage and distortion on heat aging, resistance to ozone, good tensile properties, resilience, processability, as well as a combination of toughness and flexibility are comprised of certain selectively hydrogenated block copolymers and polyamide polymers.
Claims8
A composition comprising the admixture obtained by intimately mixing 100 parts by weight of a block copolymer and about about 5 to about 200 parts by weight of a polyamide so as to form an interpenetrating network wherein:
- a. said block copolymer comprises at least two monoalkenyl arene polymer end blocks A and at least one substantially completely hydrogenated conjugated diene polymer midblock B, said block copolymer having an 8 to 55 percent by weight monoalkenyl arene polymer block content, each polymer block A having an average molecular weight of between about 5,000 and about 125,000, and each polymer block B having an average molecular weight of between about 10,000 and about 300,000;
- and
- b. said polyamide has the formula:
- ##STR2## where a or b or c individually vary from 4 to 12 inclusive, and n is chosen so that the number average molecular weight is between about 10,000 and about 30,000.
1 more element
Dependencies are inferred from the claim text.