High flow polyphenylene ether formulations
AssigneeGeneral Electric Company
InventorNirajkumar Patel
Life of this patent
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Abstract
A high flow polyphenylene ether resin composition with improved HDT values and flame retardance comprising a blend of at least two polyphenylene ether resins, a first resin having an intrinsic viscosity of at least 0.3 dl/g, and a second resin having an intrinsic viscosity of less than 0.25 dl/g and preferably having a particle size of at least about 100 μm. The composition preferably contains less than 30 wt % of the low viscosity polyphenylene ether based on the weight of the total composition. Fiber reinforced and flame retarded compositions also exhibit high HDT values.
Claims23
A fire retardant, reinforced composition comprising;
- a blend of polyphenylene ether resins comprising a Component A and a Component B, wherein Component A comprises a polyphenylene ether resin having an intrinsic viscosity of at least 0.3 dl/g, as measured in chloroform at 25° C., and Component B comprises a polyphenylene ether resin having an intrinsic viscosity of less than 0.25 dl/g, as measured in chloroform at 25° C., which is recovered from a reaction solution as a solid mass and granulated or pelletized to a desired size or is recovered from a reaction solution as an agglomerate with an average particle size greater than 100 μm;
- a flame retardant in an amount of 7% to 20% by weight of the composition;
- and
- about 3% to 30% by weight of glass fiber, based on the total weight of the entire composition, wherein the composition exhibits a UL-94 VO rating and an HDT value greater than about 139° C., as determined by ASTM D648.
A fire retardant, reinforced composition comprising:
- a blend of polyphenylene ether resins comprising a Component A and a Component B, wherein Component A comprises a polyphenylene ether resin having an intrinsic viscosity of at least 0.3 dl/g as measured in chloroform at 25° C., and Component B comprises a polyphenylene ether resin having an intrinsic viscosity of less than 0.17 dl/g as measure in chloroform at 25° C. and having an average particle size greater than about 100 μm, wherein said composition comprises 30 wt % or less of the polyphenylene ether resin of Component B;
- a flame retardant in an amount of 7% to 20% by weight of the composition;
- and
- about 3% to 30% by weight of glass fiber, based on the total weight of the entire composition, wherein the composition exhibits a UL-94 VO rating and an HDT value greater than about 139° C., as determined by ASTM D648.
Dependencies are inferred from the claim text.