Polyester resin composition having improved mechanical properties and moldability

• US 10,468,568 B2
• Filed: 03/31/2015
• Issued: 11/05/2019
• Est. Priority Date: 04/01/2014
• Status: Active Grant

• Current Assignee: Lotte Chemical Corporation
• Original Assignee: Lotte Advanced Materials Co., Ltd. (Lotte Chemical Corporation)
• Inventors: Kang, Tae Gon, Park, Chan Moo, Jung, Yoo Jin, Lim, Jong Cheol, Hong, Sang Hyun, Kim, Tae Soo, Park, Young Ho
• Primary Examiner(s): Choi, Ling Siu
• Assistant Examiner(s): Mesh, Gennadiy
• Application Number:
  US14/674,214
• Publication Number:
  US 20150280085A1
• Time in Patent Office: 1,680 Days
• CPC Class Codes: C08K 2003/2241 Titanium dioxide
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/346 Clay
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2933/0033 relating to semiconductor body packages
• CPC Class Codes: H01L 2933/0058 relating to optical field-shaping elements
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

A polyester resin composition includes: (A) a polyester resin which includes a polymer of a dicarboxylic acid component including an aromatic dicarboxylic acid, for example but not limited to terephthalic acid, and a diol component including an alicyclic diol, for example but not limited to cyclohexanedimethanol, having a trans/cis isomer ratio of about 2.3 or more; (B) a white pigment; and (C) inorganic fillers. A molded article formed from the polyester resin composition can exhibit improved mechanical properties and moldability, and thus can be suitable for light emitting diode (LED) reflectors.

Claims

1. A polyester resin composition comprising:

(A) about 30 wt % to about 70 wt % of polycyclohexylenedimethylene terephthalate (PCT) resin having a trans/cis isomer ratio of 2.5 to about 5;

(B) about 15 wt % to about 40 wt % of titanium dioxide; and

(C) about 10 wt % to about 20 wt % of glass fibers.

2. The polyester resin composition according to claim 1, wherein the PCT resin (A) has a trans/cis isomer ratio of about 2.8 to about 5.