Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Reexamination Certificate
2001-01-17
2003-11-04
Seidleck, James J. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C210S767000, C525S326100
Reexamination Certificate
active
06642352
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method of manufacturing an insulating film-forming material.
2. Description of the Background Art
Curable compositions have a wide variety of applications in the electronic field. Because of miniaturization of devices used in the electronic field in recent years, the content of metallic impurities in the materials used for providing these devices with high electric performance must be controlled to a minimum level.
The requirement for controlling the content of metallic impurities to a minimum level is also applied to curable compositions used as a material in the electronic field.
One known method for removing or reducing metallic impurities, in materials for forming insulating films, is causing an ion-exchange resin to adsorb the metals.
However, the method of using ion-exchange resins has some problems such as difficulty in handling particulate ion-exchange resins, requirement of many steps for processing ion-exchange resins after adsorption of metals, such as reverse regeneration using an alkaline (or acidic) solution, regeneration using water and an acidic (or alkaline) solution, and the like.
An object of the present invention is therefore to present a method of manufacturing an insulating film-forming material with a reduced metal content from a curable composition which contains metals at a high efficiency.
As a result of extensive studies to solve the above problems in conventional technologies, the inventors of the present invention have found that the above problems can be solved by subjecting a curable composition or raw materials thereof or both to a filter processing.
SUMMARY OF THE INVENTION
Specifically, an object of the present invention is to provide a method of manufacturing an insulating film-forming material, comprising a curable composition which comprises (A) an inorganic polymer compound or an organic polymer compound and (B) an organic solvent, the method comprising treating the curable composition with a zeta potential-producing filter material.
In a preferred embodiment of the present invention, the zeta potential-producing filter material is the filter material selected from the group consisting of cotton, pulp, cellulose, diatomite, pearlite, activated carbon, and zeolite with a cation charge modifier added thereto.
In another preferred embodiment of the present invention, the zeta potential-producing filter material is used together with an ion exchanger material or a chelate-forming material, or both.
In still another preferred embodiment of the present invention, the inorganic polymer compound is a hydrolysis condensate of at least one compound selected from the compounds (A-1) and (A-2) which are respectively shown by the following formulas (1) or (2):
R
1
a
Si(OR
2
)
4−a
(1)
wherein R
1
is a hydrogen atom, fluorine atom, or monovalent organic group, R
2
is a monovalent organic group, and a is an integer from 0 to 2,
R
3
b
(R
4
O)
3−b
Si—(R
7
)
d
—Si(OR
5
)
3−c
R
6
c
(2)
wherein R
3
, R
4
, R
5
, and R
6
individually represent a monovalent organic group, b and c individually represent an integer from 0 to 2, R
7
represents an oxygen atom or a group —(CH
2
)
n
— (wherein n is an integer from 1 to 6), and d is 0 or 1.
In still another preferred embodiment of the present invention, the organic polymer compound is at least one compound selected from the group consisting of aromatic polyarylene compounds and aromatic polyarylene ether compounds.
In still another preferred embodiment of the present invention, the curable composition further comprises (C) a compound having a boiling point or decomposition temperature of 250-450° C.
In still another preferred embodiment of the present invention, the curable composition further comprises (D) a compound having a boiling point or decomposition temperature of above 450° C.
In still another preferred embodiment of the present invention, the curable composition further comprises (E) a surfactant.
The present invention further provides a method of manufacturing an insulating film-forming material comprising a curable composition which comprises (A) an inorganic polymer compound or an organic polymer compound and (B) an organic solvent, the method comprising:
providing (A) the inorganic polymer compound or the organic polymer compound,
treating the inorganic polymer compound or organic polymer compound with a zeta potential-producing filter material, and
producing the curable composition from (A) the resulting polymer compound and (B) an organic solvent.
The present invention further provides a method of manufacturing an insulating film-forming material comprising a curable composition which comprises (A) an inorganic polymer compound or an organic polymer compound and (B) an organic solvent, the method comprising:
providing raw materials for producing (A) the inorganic polymer compound or organic polymer compound,
treating the raw materials with a zeta potential-producing filter material,
producing (A) the inorganic polymer compound or organic polymer compound from the raw materials, and
producing the curable composition from (A) the resulting polymer compound and (B) an organic solvent.
The present invention further provides a method of manufacturing an insulating film-forming material comprising,
providing (B) an organic solvent,
treating the organic solvent with a zeta potential-producing filter material, and
producing a curable composition from the resulting an organic solvent and (A) an inorganic polymer compound or an organic polymer compound.
Other objects, features and advantages of the invention will hereinafter become more readily apparent from the following description.
DETAILED DESCRIPTION OF THE INVENTION AND PREFERRED EMBODIMENTS
(Functional Filter Material)
As the zeta potential-producing filter material used in the present invention (hereinafter called “functional filter material”), filter materials causing a zeta potential to act on the liquid to be filtered are selected.
As examples of such a functional filter material, common filter materials such as cotton, pulp, cellulose, polyester, diatomite, pearlite, activated carbon, and zeolite with a cation charge modifier added thereto are given. Of these, filter materials comprising cotton, cellulose, polyester, activated carbon, and zeolite are preferable.
The addition of a cation charge modifier provides the filter material with cation charges which produce a zeta potential between the filter material and charged materials in the liquid passing through the filter material, specifically, metal components.
As a cation charge modifier, the reaction product of dicyandiamide, monoethanolamine, and formaldehyde described in U.S. Pat. No. 2,802,820, the aminotriazine resin described in U.S. Pat. No. 2,839,506, the melamine-formaldehyde cationic resin described in U.S. Pat. No. 4,007,113, the resin obtained by the reaction of N,N′-diethanolpiperazine, melamine, formalin, and glycerol phthalic acid ester described in Japanese Patent Publication 20045/1961, the polyamide polyamine epichlorohydrin cationic resin described in Japanese Patent Publication 17486/1988, and the like can be given. Of these, the polyamide polyamine epichlorohydrin cationic resin is preferable in view of its capability of providing stable cationic charges.
The above Japanese Patent Publication 17486/1988 describes a method of manufacturing a functional filter made from cellulose, diatomite, or pearlite by using the polyamide polyamine epichlorohydrin cationic resin as the cation charge modifier.
The thickness of the functional filter material used in the present invention is preferably less than 10 cm, and more preferably 0.01-10 cm.
In one preferable embodiment of the functional filter material of the present invention, the filter material is used together with an ion exchanger material or a chelate-forming material, or both.
The ion exchanger material and chelate-forming material in the present invention are polymers, such as a styrene pol
Kakinoki Katsuyuki
Nakase Yoshihisa
Nishikawa Michinori
Okada Takashi
Suzuki Hidenori
JSR Corporation
Rajguru U. K
Seidleck James J.
LandOfFree
Method of manufacturing material for forming insulating film does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of manufacturing material for forming insulating film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing material for forming insulating film will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3163933