Oxetane-cyclic epoxy compound, method of preparing the same, and composite sheet for display substrate including the same

• US 9,249,126 B2
• Filed: 04/27/2012
• Issued: 02/02/2016
• Est. Priority Date: 05/12/2011
• Status: Active Grant

• Current Assignee: Cheil Industries Incorporated, korea institute of industrial technology
• Original Assignee: Cheil Industries Incorporated, korea institute of industrial technology
• Inventors: Kim, Young Kwon, Lee, Sang Keol, Kim, Tae Ho, Lee, Woo Jin, Kim, Sung Kook, Jeon, Hyun Ae, Kim, Yun Joo, Tak, Sang Yong, Park, Suk Yeon, Kang, Kyung Nam
• Primary Examiner(s): Steele, Jennifer A
• Application Number:
  US13/457,741
• Publication Number:
  US 20120289108A1
• Time in Patent Office: 1,376 Days
• Field of Search: 428/323, 4282974-2994, 428/690, 349/88, 349/183
• US Class Current: 1/1
• CPC Class Codes: C07D 407/12 linked by a chain containing hetero atoms as chain links
• CPC Class Codes: C08G 65/18 Oxetanes
• CPC Class Codes: C08G 65/22 Cyclic ethers having at least one atom other than carbon and hydrogen outside the ring
• CPC Class Codes: C08J 5/04 Reinforcing macromolecular compounds with loose or coherent fibrous material
• CPC Class Codes: C08J 5/043 with glass fibres
• CPC Class Codes: Y10T 428/24994 Fiber embedded in or on the surface of a polymeric matrix
• CPC Class Codes: Y10T 442/10 Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
• CPC Class Codes: Y10T 442/2951 Coating or impregnation contains epoxy polymer or copolymer or polyether
• CPC Class Codes: Y10T 442/2992 Coated or impregnated glass fiber fabric

Abstract

An oxetane-cyclic epoxy compound represented by Formula 1:

• • where R₁ is hydrogen, a methyl group or an ethyl group.

Claims

1. A composite sheet, comprising:

a binder, the binder being formed using an oxetane-cyclic epoxy compound represented by Formula 1,

2. The composite sheet as claimed in claim 1, comprising:

about 60 to about 300 parts by weight of the glass fillers, based on 100 parts by weight of the binder.

3. The composite sheet as claimed in claim 1, wherein the glass fillers comprise at least one selected from the group of glass fiber, glass fiber cloth, glass fabric, unwoven glass cloth, glass mesh, glass beads, glass powder, and glass flakes.

4. The composite sheet as claimed in claim 1, wherein the binder is formed using the oxetane-cyclic epoxy compound and a cation polymerizable compound.

5. The composite sheet as claimed in claim 4, wherein the cation polymerizable compound comprises at least one selected from the group of an epoxy group-containing compound, an oxetane group-containing compound, a vinyl ether group-containing compound, and a caprolactone group-containing compound.

6. The composite sheet as claimed in claim 4, wherein the binder has a difference in index of refraction of about 0.01 or less from the glass filler.

7. The composite sheet as claimed in claim 1, wherein the binder is formed using the oxetane-cyclic epoxy compound and a cationic initiator.

8. The composite sheet as claimed in claim 1, wherein the composite sheet has a glass transition temperature of about 200°

C. or higher.

9. A display substrate comprising the composite sheet as claimed in claim 1.

10. The display substrate as claimed in claim 9, wherein the substrate has a coefficient of thermal expansion of about 30 ppm/°

C. or less, measured by a thermomechanical analyzer (TMA) at 5°

C./min from 30 to 250°

C.

11. The composite sheet as claimed in claim 4, wherein a weight ratio of the oxetane-cyclic epoxy compound to the cation polymerizable compound in the binder is about 1:

1.5 to about 1;

3.

12. A composite sheet, comprising:

a binder, the binder being formed using a cation polymerizable compound, a cationic initiator, and an oxetane-cyclic epoxy compound represented by Formula 1,