08-08-2019 дата публикации
Номер: US20190241698A1
Принадлежит:
A hardener composition is prepared by blending a low intrinsic viscosity hydroxyl-diterminated poly(phenylene ether), and an anhydride having structure (1) where q, R, and X are defined herein. The hardener composition exhibits glass transition temperature of −46 to +110° C., which is characteristic of the blend and distinct from the glass transition temperatures of the individual components. Also described are a method of forming the hardener composition, a curable epoxy composition incorporating the hardener composition, a cured composition formed from the curable epoxy composition, and an article that includes the cured composition. 2. The hardener composition of claim 1 , excluding epoxy resin.4. The hardener composition of claim 1 , wherein the hydroxyl-diterminated poly(phenylene ether) comprises a copolymer of 2 claim 1 ,6-xylenol and 2 claim 1 ,2-bis(3 claim 1 ,5-dimethyl-4-hydroxyphenyl)propane.5. The hardener composition of claim 1 , wherein q is 1.6. The hardener composition of claim 1 , wherein the anhydride having structure (1) is selected from the group consisting of 5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , methyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , ethyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , propyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , iso-propyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , butyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , sec-butyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , tent-butyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , pentyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , neo-pentyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , hexyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , cyclohexyl-5-norbornene-2 claim 1 ,3-dicarboxylic anhydride claim 1 , and combinations thereof.7. The hardener composition of claim 1 , wherein q is 1 claim 1 , Ris methyl ...
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