Environment-friendly stable polyamide acid solution and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A polyamic acid and stability technology, applied in the field of polyamic acid solution and its preparation, can solve the problems of poor batch stability, difficult preparation of polyamic acid aqueous solution, wide molecular weight distribution, etc., and achieve increased quality stability and improved production. Membrane efficiency, the effect of increasing the solid content
Active Publication Date: 2016-04-06
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
View PDF4 Cites 11 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] The present invention solves the problems of large-scale preparation of existing polyamic acid aqueous solution, wide molecular weight distribution, and poor batch stability, and provides an environment-friendly stable polyamic acid solution and a preparation method thereof
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0048] Embodiment 1: An environment-friendly stable polyamic acid solution of this embodiment, an environment-friendly stable polyamic acid solution is made of tertiary amine, aromatic primary amine, aromatic dianhydride, aromatic diamine and water; The molar ratio of the aromatic diamine to the tertiary amine is 1:(0.05~2); the molar ratio of the aromatic diamine to the primary aromatic amine is 1:(0.01~1); the aromatic diamine and The molar ratio of the aromatic dianhydride is 1:(0.97~1.03); the mass ratio of the total mass of the aromatic dianhydride and aromatic diamine to water is 1:(2~10); the aromatic diamine is 4 ,4'-diaminodiphenyl ether, 3,4'-diaminodiphenyl ether, 4,4'-diaminodiphenylmethane, bis(3-aminophenoxy)benzophenone, p-phenylenediamine , m-phenylenediamine or 2-(3-aminophenyl)-5-aminobenzoxazole;
[0049] When the aromatic dianhydride is 3,3,4',4'-diphenyl ether tetracarboxylic dianhydride, 3,3,4',4'-disulfone tetracarboxylic dianhydride or 3,3, 4',4'-benz...
specific Embodiment approach 2
[0064] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the tertiary amine is triethylamine, trialkyl tertiary amine, octadecyl dimethyl tertiary amine and dodecyl dimethyl One or a mixture of several tertiary amines. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0065] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the aromatic primary amine is 4-fluoroaniline, 3-aminopyridine, 3-acetylaniline and 2-nitroaniline one or a mixture of several of them. Others are the same as in the first or second embodiment.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a polyamide acid solution and a preparation method thereof, in particular to an environment-friendly stable polyamide acid solution and a preparation method thereof. The environment-friendly stable polyamide acid solution and the preparation method thereof aim at solving the problems of difficultly of large-scale preparation of a polyamide acid aqueous solution, wide molecular weight distribution and poor batch stability in the prior art. The environment-friendly stable polyamide acid solution is prepared from tertiary amine, aromatic primary amine, aromatic dianhydride, aromatic diamine and water, wherein repetitive units of polyamide acid in the polyamide acid aqueous solution are shown in the specification. The preparation method includes the steps that tertiary amine, aromatic primary amine, aromatic dianhydride, aromatic diamine and water are taken, and weighed tertiary amine is divided into tertiary amine A and tertiary amine B; water and aromatic primary amine are added into a three-necked bottle under certain conditions for a reaction; weighed tertiary amine A and weighed aromatic diamine are added into the three-necked bottle for a reaction, reaction liquid is heated, then weighed aromatic dianhydride is added into the three-necked bottle and stirred for a reaction, then the reaction liquid is cooled, weighed tertiary amine B is added and stirred for a reaction, and the reaction liquid is cooled and subjected to standing.
Description
technical field [0001] The invention relates to a polyamic acid solution and a preparation method thereof. Background technique [0002] Polyimide is an aromatic heterocyclic polymer containing imide rings in repeating structural units. It is the highest heat-resistant polymer material used in the industrial field so far. With its excellent comprehensive performance, it can be used in films, resins, Fibers and separation membranes are widely used in aerospace, electronics and electrical fields. Traditional polyimides are usually made of aromatic tetracarboxylic anhydride and aromatic diamine in aprotic polar solvents, such as N,N-dimethylacetamide, N,N-dimethylformamide, N -Methylpyrrolidone, etc., by first forming polyamic acid, and then imidizing and dehydrating to form polyimide. Aprotic polar solvents can form polyamic acid with high molecular weight and narrow molecular weight distribution at room temperature because the equilibrium constant of this acylation reaction...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more