Liquid crystal polyester resin
An object of the present invention is to provide a liquid crystal polyester resin having low-temperature processability and improved mechanical properties. The present invention relates to a liquid crystal polyester resin comprising specific repeating units and having a crystal melting temperature of less than 210° C. as measured with a differential scanning calorimeter.
1. A liquid crystal polyester resin comprising repeating units represented by the following formulae [I] to [VI] and having a crystal melting temperature of 189° C. or less as measured with a differential scanning calorimeter:
wherein p, q, r, s, t, and u represent the compositional proportions (mol %) of the respective repeating units in the liquid crystal polyester resin and satisfy the following equations:
35≤ p≤ 55,
25≤ q≤ 45,
2≤ r≤ 15,
0≤ s≤ 5,
2≤ t≤ 15,
0≤ u≤ 5,
r≥s,
p+q+r+s+t+u= 100.
2. The liquid crystal polyester resin according to claim 1 , wherein the repeating unit represented by formula [VI] is a repeating unit represented by formula [VII]:
3. The liquid crystal polyester resin according to claim 1 , further satisfying p>q.
4. The liquid crystal polyester resin according to claim 2 , further satisfying p>q.
5. A liquid crystal polyester resin composition comprising 0.1 to 200 parts by mass of one or two or more of fibrous, plate-like, or powdery filler per 100 parts by mass of the liquid crystal polyester resin according to claim 1 .
6. A liquid crystal polyester resin composition comprising 0.1 to 200 parts by mass of one or two or more of fibrous, plate-like, or powdery filler per 100 parts by mass of the liquid crystal polyester resin according to claim 2 .
7. A liquid crystal polyester resin composition comprising 0.1 to 200 parts by mass of one or two or more of fibrous, plate-like, or powdery filler per 100 parts by mass of the liquid crystal polyester resin according to claim 3 .
8. A liquid crystal polyester resin composition comprising 0.1 to 200 parts by mass of one or two or more of fibrous, plate-like, or powdery filler per 100 parts by mass of the liquid crystal polyester resin according to claim 4 .
9. A molded article comprising the liquid crystal polyester resin according to claim 1 .
10. A molded article comprising the liquid crystal polyester resin according to claim 2 .
11. A molded article comprising the liquid crystal polyester resin according to claim 3 .
12. A molded article comprising the liquid crystal polyester resin according to claim 4 .
13. A molded article comprising the liquid crystal polyester resin composition according to claim 5 .
14. A molded article comprising the liquid crystal polyester resin composition according to claim 6 .
15. A molded article comprising the liquid crystal polyester resin composition according to claim 7 .
16. A molded article comprising the liquid crystal polyester resin composition according to claim 8 .
17. The liquid crystal polyester resin according to claim 1 , wherein the crystal melting temperature is 160° C. to 189° C.