Poly(amide-imide) block copolymer, article including same, and display device including the article
US-9200117-B2 · Dec 1, 2015 · US
Polyamide-imide copolymer film and method of preparing polyamide-imide copolymer
US9434816B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9434816-B2 |
| Application number | US-201214409895-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2012 |
| Priority date | Jun 25, 2012 |
| Publication date | Sep 6, 2016 |
| Grant date | Sep 6, 2016 |
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Abstract
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Disclosed herein is a polyamide-imide copolymer film, comprising a copolymer resin in which a unit structure derived from TFDB (2,2′-bis-trifluoromethyl-4,4′-biphenyl diamine), a unit structure derived from 6FDA (4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride) and a unit structure derived from TPC (Terephthaloyl chloride; 1,4-benzenedicarbonyl chloride) are copolymerized.
First claim
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The invention claimed is: 1. A polyamide-imide copolymer film, comprising a copolymer resin which is obtained by copolymerizing a unit structure derived from (2,2′-bis-trifluoromethyl-4,4′-biphenyl diamine (TFDB), a unit structure derived from (4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride (6FDA) and a unit structure derived from terephthaloyl chloride (TPC), wherein the copolymer resin contains the unit structure derived from TFDB, the unit structure derived from 6FDA, and the unit structure derived from TPC in a molar ratio of 1:0.2-0.8:0.8-0.2. 2. The polyamide-imide copolymer film of claim 1 , wherein the copolymer resin is a copolymer resin in which the unit structure derived from TFDB, the unit structure derived from 6FDA and the unit structure derived from TPC are copolymerized in a molar ratio of 1:0.3-0.7:0.7-0.3. 3. The polyamide-imide copolymer film of claim 1 , wherein the copolymer resin has a weight average molecular weight of 10,000-400,000. 4. A method of preparing a polyamide-imide copolymer, comprising the step of: solution-reacting 2,2′-bis-trifluoromethyl-4,4′-biphenyl diamine (TFDB) with 4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride (6FDA) to prepare a first polymer, and then solution-reacting the first polymer with terephthaloyl chloride (TPC) to prepare polyamic acid; and imidizing the polyamic acid in the presence of an imidization catalyst, wherein the copolymer resin is a copolymer resin in which the unit structure derived from TFDB, the unit structure derived from 6FDA, and the unit structure derived from TPC are copolymerized in a molar ratio of 1:0.2-0.8:0.8-0.2. 5. The method of claim 4 , wherein, in the step of preparing the polyamic acid, the solution-reaction of TFDB with 6FDA is conducted such that a molar ratio of FTDB: 6FDA is 100 mol %: X mol %, and the solution-reaction of the first polymer with TPC is conducted such that a molar ratio of the first polymer: TPC is 100 mol %: 100−X mol %, wherein X is 20-80.
Assignees
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Classifications
- C08G73/14Primary
Polyamide-imides · CPC title
Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title
comprising halogen-containing substituents · CPC title
Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title
Manufacture of films or sheets · CPC title
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- What does patent US9434816B2 cover?
- Disclosed herein is a polyamide-imide copolymer film, comprising a copolymer resin in which a unit structure derived from TFDB (2,2′-bis-trifluoromethyl-4,4′-biphenyl diamine), a unit structure derived from 6FDA (4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride) and a unit structure derived from TPC (Terephthaloyl chloride; 1,4-benzenedicarbonyl chloride) are copolymerized.
- Who is the assignee on this patent?
- Park Hyo Jun, Jung Hak Gee, Kolon Inc
- What technology area does this patent fall under?
- Primary CPC classification C08G73/14. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 06 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).