JPS557829A - Preparation of aqueous dispersion of diamine - Google Patents
Preparation of aqueous dispersion of diamineInfo
- Publication number
- JPS557829A JPS557829A JP7979578A JP7979578A JPS557829A JP S557829 A JPS557829 A JP S557829A JP 7979578 A JP7979578 A JP 7979578A JP 7979578 A JP7979578 A JP 7979578A JP S557829 A JPS557829 A JP S557829A
- Authority
- JP
- Japan
- Prior art keywords
- water
- polyamine
- diamine
- pref
- sulfuric acid
- 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.)
- Pending
Links
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
PURPOSE: To prepare the title dispersion, economically, without washing with water after the neutralization process, by hydrolyzing a urethane bond-containing polyisocyanate with sulfuric acid and water, neutralizing the hydrolyzate with a basic compound such as calcium, etc., and finally emulsifying the product.
CONSTITUTION: A polyisocyanate having urethane bonds, pref. of formula (R is diol residue having a molecular weight of 500W15,000; R' is divalent hydrocarbon radical; n is 1W25) is hydrolyzed with sulfuric acid and water. The polyamine sulfate thus obtained is neutralized with a basic compound of Ca or Ba, e.g. Ca(OH)2, until pref. ≥55% of the polyamine salt is converted to the free polyamine. The neutralized product is emulsified with an emulsifier, etc. to obtain the objective aqueous solution of diamine.
USE: Waterproofing material, paint, adhesive, etc. by mixing with an epoxy resin, etc.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7979578A JPS557829A (en) | 1978-07-03 | 1978-07-03 | Preparation of aqueous dispersion of diamine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7979578A JPS557829A (en) | 1978-07-03 | 1978-07-03 | Preparation of aqueous dispersion of diamine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS557829A true JPS557829A (en) | 1980-01-21 |
Family
ID=13700145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7979578A Pending JPS557829A (en) | 1978-07-03 | 1978-07-03 | Preparation of aqueous dispersion of diamine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS557829A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724252A (en) * | 1985-08-27 | 1988-02-09 | Bayer Akitengesellschaft | Polyamines and a process for their production from polyisocyanates |
| US4931595A (en) * | 1985-10-01 | 1990-06-05 | Bayer Aktiengesellschaft | Catalytic hydrolysis process for polyamines |
| US5283364A (en) * | 1985-10-18 | 1994-02-01 | Bayer Aktiengesellschaft | Hydrolysis process for polyamines |
-
1978
- 1978-07-03 JP JP7979578A patent/JPS557829A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4724252A (en) * | 1985-08-27 | 1988-02-09 | Bayer Akitengesellschaft | Polyamines and a process for their production from polyisocyanates |
| US4931595A (en) * | 1985-10-01 | 1990-06-05 | Bayer Aktiengesellschaft | Catalytic hydrolysis process for polyamines |
| US5283364A (en) * | 1985-10-18 | 1994-02-01 | Bayer Aktiengesellschaft | Hydrolysis process for polyamines |
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