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US 12,624,160 B2Granted
Liquid crystal polymer compositions, articles and methods of making
AssigneeSyensqo Specialty Polymers USA, LLC
InventorEmmanuel Anim-Danso
Life of this patent
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Abstract
Described herein are polymer compositions including at least 20 wt. % of a liquid crystal polymer (“LCP”); 10 wt. % to 40 wt. % of a flat glass fiber and 15 wt. % to 50 wt. % of boron nitride and/or zinc oxide. It was surprisingly discovered that polymer compositions including an LCP in conjunction with a combination of flat glass fibers and boron nitride and/or zinc oxide had improved thermal conductivity and flexural properties, relative to analogous polymer compositions having round glass fibers in place of the flat glass fibers.
Claims8
A polymer composition consisting of:
- at least 20 wt. % and at most 60 wt. %, based on the total weight of the polymer composition, of a liquid crystal polymer formed from the polycondensation of the following monomers:
- terephthalic acid, 4,4′-biphenol, isophthalic acid, and 4-hydroxybenzoic acid;
- from 10 wt. % to 40 wt. %, based on the total weight of the polymer composition, of a flat glass fiber;
- and
- boron nitride and zinc oxide, wherein the total concentration of boron nitride and zinc oxide is from 15 wt. % to 50 wt. %, based on the total weight of the polymer composition;
- optionally an additive selected from the group consisting of tougheners, plasticizers, colorants, pigments, antistatic agents, dyes, lubricants, thermal stabilizers, light stabilizers, nucleating agents, and antioxidants;
- wherein the relative concentration of boron nitride to zinc oxide expressed as weight of boron nitride in the polymer composition/weight of zinc oxide in the polymer composition is from 0.5 to 2,
- wherein the flat glass fiber is E-glass fiber and the composition is free of additional glass fibers;
- wherein the flat glass fiber has an aspect ratio of at least 2 and at most 8;
- wherein the flat glass fiber has an average length of from 3 mm to 50 mm wherein the average length is the average length of the glass fiber prior to incorporation into the polymer composition or the average length of the glass fiber in the polymer composition;
- and
- wherein the composition has an apparent viscosity from 90 Pa.s to 300 Pa.s at a shear rate of 100 s-1, as measured according to ASTM D3835.
9 more elements
Dependencies are inferred from the claim text.