JPS5753519A - Preparation of crosslinked urea-formaldehyde polymer particle - Google Patents
Preparation of crosslinked urea-formaldehyde polymer particleInfo
- Publication number
- JPS5753519A JPS5753519A JP12718380A JP12718380A JPS5753519A JP S5753519 A JPS5753519 A JP S5753519A JP 12718380 A JP12718380 A JP 12718380A JP 12718380 A JP12718380 A JP 12718380A JP S5753519 A JPS5753519 A JP S5753519A
- Authority
- JP
- Japan
- Prior art keywords
- precondensate
- aqueous solution
- reaction
- urea
- formaldehyde
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To prepare the titled polymer particles having fine particle diameter, and useful as a paper filler, by adding the waste filtrate solution discharged from the filtration process of the titled polymer to the reaction system at a specific stage of the reaction of a precondensate derived from urea and formaldehyde with an aqueous solution of an acid catalyst, and continuing the reaction.
CONSTITUTION: 1.0mol of urea and 1.4W1.9mol of formaldehyde are added to an aqueous solution of carboxymethyl cellulose sodium salt, etc., and made to react at pH6W10 and 10W95°C to obtain the precondensate. The precondensate is mixed with an aqueous solution of an acid catalyst such as sulfuric acid, and under stirring, fed to a conveyor belt to solidify the condensate. Before solidification, the waste filtrate solution produced in the filtration process of the product is charged to the reaction system as a diluting water. The solidified product is slurried with water, finely divided to the particle diameter of 1W10μ by colloid mill, etc., and filtered and dehydrated to obtain the objective polymer particles. The produced waste filtrate solution is recycled as stated above.
EFFECT: Fine particles of 0.1W1μ diameter can be obtained, and the environmental pollution can be prevented.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12718380A JPS5952889B2 (en) | 1980-09-16 | 1980-09-16 | Method for producing crosslinked urea formaldehyde polymer particles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12718380A JPS5952889B2 (en) | 1980-09-16 | 1980-09-16 | Method for producing crosslinked urea formaldehyde polymer particles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5753519A true JPS5753519A (en) | 1982-03-30 |
JPS5952889B2 JPS5952889B2 (en) | 1984-12-21 |
Family
ID=14953722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12718380A Expired JPS5952889B2 (en) | 1980-09-16 | 1980-09-16 | Method for producing crosslinked urea formaldehyde polymer particles |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5952889B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6136312A (en) * | 1984-07-27 | 1986-02-21 | Nippon Kasei Kk | Production of urea formaldehyde resin |
JPS6136311A (en) * | 1984-07-27 | 1986-02-21 | Nippon Kasei Kk | Production of urea formaldehyde resin |
JPS61146900A (en) * | 1984-12-17 | 1986-07-04 | 三井東圧化学株式会社 | Production of printing paper |
-
1980
- 1980-09-16 JP JP12718380A patent/JPS5952889B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6136312A (en) * | 1984-07-27 | 1986-02-21 | Nippon Kasei Kk | Production of urea formaldehyde resin |
JPS6136311A (en) * | 1984-07-27 | 1986-02-21 | Nippon Kasei Kk | Production of urea formaldehyde resin |
JPH0542454B2 (en) * | 1984-07-27 | 1993-06-28 | Nippon Kasei Chem | |
JPH0542455B2 (en) * | 1984-07-27 | 1993-06-28 | Nippon Kasei Chem | |
JPS61146900A (en) * | 1984-12-17 | 1986-07-04 | 三井東圧化学株式会社 | Production of printing paper |
Also Published As
Publication number | Publication date |
---|---|
JPS5952889B2 (en) | 1984-12-21 |
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