Liquid crystal polyester resin composition, molded body, and LED reflector
View Patent ↗A liquid crystal polyester resin composition of the present invention comprises: 100 parts by mass of a liquid crystal polyester; and 50 to 150 parts by mass of titanium oxide, wherein the liquid crystal polyester comprises 2 to 30 mole % of a repeating structural unit represented by the following formula (1), and 40 to 80 mole % of a repeating structural unit represented by the following formula (2).
1. A liquid crystal polyester resin composition consisting essentially of:
100 parts by mass of a liquid crystal polyester; and
50 to 150 parts by mass of titanium oxide,
wherein the liquid crystal polyester comprises 2 to 30 mole % of a repeating structural unit represented by the following formula (1), and 40 to 80 mole % of a repeating structural unit represented by the following formula (2)
and wherein the liquid crystal polyester compostion maintains at 480 nm wave light reflectance of a surface of a 3 mm thickness obtained by injection molding after 500 hours light irradiation a light reflectance of 75% or more.
2. The liquid crystal polyester resin composition according to claim 1 , wherein the liquid crystal polyester comprises 10 to 30 mole % of the repeating structural unit represented by the formula (1), 40 to 80 mole % of the repeating structural unit represented by the formula (2), and 10 to 30 mole % of a repeating structural unit represented by the following formula (3):
[Chemical Formula 3]
—O—X—O— (3)
wherein X represents a divalent group having an aromatic ring.
3. The liquid crystal polyester resin composition according to claim 1 , wherein the liquid crystal polyester comprises 2 to 29 mole % of the repeating structural unit represented by the formula (1), 40 to 80 mole % of the repeating structural unit represented by the formula (2), 10 to 30 mole % of a repeating structural unit represented by the following formula (3), and 1 to 28 mole % of a repeating structural unit represented by the following formula (4), and the liquid crystal polyester comprises 1 mole % or more of a repeating structural unit represented by the following formula (5) as the repeating structural unit represented by the formula (4):
[Chemical Formula 4]
—O—X—O— (3)
wherein X represents a divalent group having an aromatic ring;
wherein Y represents a divalent group having an aromatic ring; and
wherein two bonds of an aromatic ring are in a meta or para relationship.
4. The liquid crystal polyester resin composition according to claim 1 , wherein the liquid crystal polyester is obtained by two-stage polymerization of melt polycondensation and solid phase polycondensation.
5. The liquid crystal polyester resin composition according to claim 1 , wherein a melting point of the liquid crystal polyester is 300° C. or more and 380° C. or less.
6. A molded body comprising the liquid crystal polyester resin composition according to claim 1 .
7. An LED reflector comprising the liquid crystal polyester resin composition according to claim 1 .