Unlock instant, AI-driven research and patent intelligence for your innovation.

Polyimide solvent cast films having a low coefficient of thermal expansion and method of manufacture thereof

A technology of thermal expansion coefficient and polyimide film, applied in chemical instruments and methods, liquid chemical plating, synthetic resin layered products, etc.

Inactive Publication Date: 2009-08-12
SABIC INNOVATIVE PLASTICS IP BV
View PDF13 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is no standard thickness for this test, the minimum thickness at which the film passes the flux float test can be recorded

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
  • Polyimide solvent cast films having a low coefficient of thermal expansion and method of manufacture thereof
  • Polyimide solvent cast films having a low coefficient of thermal expansion and method of manufacture thereof
  • Polyimide solvent cast films having a low coefficient of thermal expansion and method of manufacture thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0058] Solvent cast films according to the present invention may be prepared by any method known in the art. The following patents assigned to GE disclose general methods of making solvent cast films and casting solutions: 4,115,341; 4,157,996; 4,307,226; 4,360,633; 4,374,972; and, 3,847,867. A method of preparation may include the steps of forming a polyamic acid solution comprising monomers comprising one or more dianhydrides and one or more organic diamines at least partially dissolved in a solvent system The polyamic acid product of component; Cast this polyamic acid solution on the substrate, make this polyamic acid solution have the form of length, width and depth on the substrate surface; Remove solvent, and solidify this polyamic acid solution, A film is formed having a CTE of less than 70 ppm / °C, specifically less than 60 ppm / °C, and a thickness of 0.5 microns to 250 microns, specifically 0.1 to 250 microns.

[0059] Alternatively, the method may comprise preparing a...

Embodiment 1-72

[0267] The film casting method and experiment of embodiment 1-72:

[0268] Formulations 1-72 of the invention were prepared using the compositions listed in Table 1. For each anhydride, the amount of each monomer was calculated using a stoichiometry of 1 amine per anhydride, without correction for purity, (correcting for purity affects the final molecular weight of the polymer and can affect the final properties of the article). A Microsoft Excel spreadsheet calculator was set up to calculate the grams of each monomer based on the desired total polymer in grams and the monomer feed for dianhydride and amine. Those skilled in the art will appreciate that there are many different ways to ascertain the correct weight of each ingredient to be used to prepare a film according to the invention. Those skilled in the art are able to calculate the weight of the ingredients based on the total stoichiometry and calculate the final percent solids based on the reaction mechanism enumerate...

Embodiment 73

[0304] Detailed film casting example:

[0305] On an analytical balance, weigh out 0.5937 g (0.001914 mol) of 4,4′-oxydiphthalic anhydride and 0.4752 g (0.001914 mol) of 4,4′-diaminodiphenylsulfone to the desired weight within ±0.0005g. The monomer was transferred to a 20 mL scintillation vial and the weighing paper was rinsed with 2.0 mL of dimethylacetamide to ensure complete monomer transfer. The remaining solvent (5.47 mL dimethylacetamide) was removed with a volumetric pipette to give a solution of 12.5 wt% solids. The tube was inertized by flowing nitrogen through the tube for 1 minute and then quickly capping the tube. The samples were then placed on a shaker overnight to form a poly(amic acid) solution.

[0306] Slides (Fisherbrand pre-cleaned microscope slides) were washed with hexane. The solution (2.0 mL) was then filtered through a 0.45 micron syringe tip filter onto a glass slide. The solution-coated slides were then placed on a hot plate equipped with: tempe...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

A solvent cast film comprises a polyimide comprising structural units derived from polymerization of a dianhydride component comprising a dianhydride selected from the group consisting of 3,4'-oxydiphthalic dianhydride, 3,3'-oxydiphthalic dianhydride, 4,4'-oxydiphthalic dianhydride, and combinations thereof, with a diamine component wherein the polyimide has a glass transition temperature of at least 190 DEG C.; wherein the film has a coefficient of thermal expansion of less than 60 ppm / DEG C., a thickness from 0.1 to 250 micrometers, and less than 5% residual solvent by weight; wherein the polyimide has less than 15 molar % of structural units derived from a member selected from the group consisting of biphenyltetracarboxylic acid, a dianhydride of biphenyltetracarboxylic acid, an ester of biphenyltetracarboxylic acid, and a combination thereof.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to co-pending US Provisional Application 60 / 805,821, filed June 26, 2006, which is hereby incorporated by reference in its entirety. field of invention [0003] The present invention relates to solvent cast films comprising polyimides and methods of making such films. The film is formed by polymerization of a dianhydride component and a diamine component, and has a Tg of 180°C to 450°C, especially 190°C or more, and wherein the film has: a) less than 70ppm / °C, especially is a CTE of less than 60 ppm / °C; b) has a thickness of 0.1 micron to 250 microns, especially 5 to 250 microns; and, c) contains less than 5 wt% residual solvent. Background technique [0004] Thermoplastic sheets and films have a wide variety of applications. For example, thermoplastic films and sheets can be used in automotive applications, electronic applications, military applications, appliances, industrial equipm...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/08C08K13/02C08K5/134C23C18/54H05K9/00B44C5/04B32B27/32B32B5/18C08J5/18C08L79/08
Inventor 陈国邦埃里克·哈格伯格塔拉·J·马伦罗伊·R·奥德尔
Owner SABIC INNOVATIVE PLASTICS IP BV