Method for producing polyimide film
US-2017137571-A1 · May 18, 2017 · US
DMPA-based solvent systems for the synthesis of poly (amic acid) and polyimide polymers
US10487178B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10487178-B2 |
| Application number | US-201615544404-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 28, 2016 |
| Priority date | Sep 28, 2016 |
| Publication date | Nov 26, 2019 |
| Grant date | Nov 26, 2019 |
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Abstract
Official abstract text for this publication.
The process for synthesizing a poly(amic acid) polymer or a polyimide polymer is improved by using a solvent system consisting essentially of: (A) a first component consisting essentially of N,N-dimethyl propionamide (DMPA), and (B) optionally, a second component consisting essentially of at least one of a sulfoxide, e.g., DMSO, an alkyl phosphate, e.g., triethyl phosphate, and an aprotic glycol ether, e.g., propylene glycol methyl ether acetate.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for synthesizing poly(amic acid) polymer, the process comprising the step of contacting under synthesis conditions and in a solvent system, (i) a cyclic tetracarboxylic dianhydride, and (ii) a diamine monomer, wherein the solvent system consisting essentially of: (A) a first component of N,N-dimethyl propionamide (DMPA), and (B) a second component of dimethyl sulfoxide (DMSO). 2. The process of claim 1 in which the solvent system consists essentially of, based on the weight of the solvent system, from 20 to 80 wt % of the first component and from 20 to 80 wt % of the second component. 3. A process for synthesizing poly(amic acid) polymer, the process comprising the step of contacting under synthesis conditions and in a solvent system, (i) a cyclic tetracarboxylic dianhydride, and (ii) a diamine monomer, wherein the solvent system consisting essentially of: (A) N,N-dimethyl propionamide (DMPA), and (B) triethyl phosphate. 4. A process for synthesizing poly(amic acid) polymer, the process comprising the step of contacting under synthesis conditions and in a solvent system, (i) a cyclic tetracarboxylic dianhydride, and (ii) a diamine monomer, wherein the solvent system consisting essentially of: (A) a first component of N,N-dimethyl propionamide (DMPA), and (B) a second component consisting of at least one of propylene glycol methyl ether acetate, dipropylene glycol methyl ether acetate, propylene glycol diacetate, ethylene glycol n-butyl ether acetate, diethylene glycol n-butyl ether acetate, and dipropylene glycol dimethyl ether.
Assignees
Inventors
Classifications
- C08G73/1071Primary
Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain · CPC title
with oxygen only in the diamino moiety · CPC title
Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title
- C08G73/1032Primary
characterised by the solvent(s) used · CPC title
containing sulfur · CPC title
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- What does patent US10487178B2 cover?
- The process for synthesizing a poly(amic acid) polymer or a polyimide polymer is improved by using a solvent system consisting essentially of: (A) a first component consisting essentially of N,N-dimethyl propionamide (DMPA), and (B) optionally, a second component consisting essentially of at least one of a sulfoxide, e.g., DMSO, an alkyl phosphate, e.g., triethyl phosphate, and an ap…
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification C08G73/1071. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 26 2019 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).