E.i. Dupont De Nemours and Company

Nutrition & Biosciences USA 4, Inc.

Shengmei Yuan

Olaf Norbert Kirchner

Andri E Elia

Martyn Douglas Wakeman

Toshikazu Kobayashi

Marvin M Martens

Xian Jiang

Anna Kutty Mathew

Annakutty Mathew

Karl Paul Maurer

David V Mesaros

John Gavenonis

Edmund A Flexman, Jr

Described herein are polyamide compositions comprising poly alpha-1,3-glucan in combination with a compatibilizer and processes for preparing such compositions. Such polyamide compositions exhibit improved elongation at break compared to polyamide compositions which lack a compatibilizer. These polyamide compositions exhibit an elongation at break of at least 9 percent when measured according to ASTM D638 after exposure to water at 120&#xb0; C. at 2 atm pressure for 192 hours.

Polyamide compositions

Disclosed is a injection molded composite wheel, including a thermoplastic polyamide composition consisting essentially of (A) 20 to 70 weight percent of at least one polyamide resin including at least one repeat unit selected from the group consisting of the formulas&#x2014;C(O)(CH)C(O)NH(CH)NH&#x2014;&#x2003;&#x2003;(I),&#x2014;C(O)(CH)C(O)NH(CH)NH&#x2014;&#x2003;&#x2003;(II),&#x2014;C(O)(CH)C(O)NH(CH)NH&#x2014;&#x2003;&#x2003;(III), and&#x2014;C(O)(CH)C(O)NH(CH)NH&#x2014;&#x2003;&#x2003;(IV);wherein n is an integer selected from 4, 6, and 10, and with the proviso that when the polyamide resin has repeat units of formula (I), at least one other repeat unit of formula (II)-(IV) is also present in at least 30 mol % content; (B) 20 to 65 weight percent of one or more fiber reinforcing agents, and (C) 0 to 20 weight percent of one or more polymer impact modifiers.

Composite wheel for a vehicle

Disclosed herein are composite structures having improved heat aging and interlayer adhesion properties, processes for making them, and end use articles. The composite structures comprise a second component overmolded onto a first component and wherein the surface of the first and optionally of second component comprise a copper based heat stabilizer thereby providing superior bond strength between components compared to polyhydric alcohol based heat stabilizers.

Composite structures having improved heat aging and interlayer bond strength

Disclosed are composite structures having improved heat aging, processes for making them, and end use articles. The composite structures comprise a polyamide matrix resin composition comprising copper based heat stabilizer; a fibrous material and a polyamide surface resin composition comprising surface heat stabilizer; wherein the surface heat stabilizer is different than the copper based heat stabilizer.

Disclosed is a thermoplastic composition including (A) a polyamide resin independently selected from the group consisting of Group (I) Polyamides having a melting point of at least 260&#xb0; C., and comprising (a) greater than 95 mole percent semiaromatic repeat units and (b) less than 5 mole percent aliphatic repeat units; (B) 0 to 60 weight percent of one or more reinforcement agents; and (C) 0 to 50 weight percent of one or more a polymeric tougheners; wherein the weight percentages are based on the total weight of said thermoplastic composition; and wherein said polyamide resin has at least 50 meq/Kg of acid ends.

Growing community of inventors

Newark, DE, United States of America

Shengmei Yuan