JPS5543125A - Preparation of polyamide foam - Google Patents
Preparation of polyamide foamInfo
- Publication number
- JPS5543125A JPS5543125A JP11596178A JP11596178A JPS5543125A JP S5543125 A JPS5543125 A JP S5543125A JP 11596178 A JP11596178 A JP 11596178A JP 11596178 A JP11596178 A JP 11596178A JP S5543125 A JPS5543125 A JP S5543125A
- Authority
- JP
- Japan
- Prior art keywords
- lactam
- mixture
- carboxylic acid
- polyamide foam
- alkali catalyst
- 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
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
PURPOSE: To obtain a polyamide foam having uniform cells, without inviting the danger of toxicity, fire, and explosion, by polymerizing and foaming a blend of (A) a mixture of a lactam, an alkali catalyst, and a carboxylic acid and (B) a mixture of a lactam and an isocyanate.
CONSTITUTION: A lactam, e.g. caprolactam, is mixed with an alkali catalyst, e.g. a sodium salt of a lactam, and a carboxylic acid, preferably having a boiling point ≥150°C. The mixture is blended with a mixture of a lactam, an aromatic, alicyclic, or aromatic mono-or polyisocyanate, polymerized, and foamed under heating to give a polyamide foam. The amounts of the alkali catalyst and the isocyanate are 0.2W 4mol%, preferably 0.3W2.5mol%, and 0.1W10mol%, prferably 0.2W5mol%, based on the total lactam. The carboxylic acid is used in an amount of 0.03W1g equivalent, preferably 0.05W0.75g equivalent per mole of the catalyst.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11596178A JPS5543125A (en) | 1978-09-22 | 1978-09-22 | Preparation of polyamide foam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11596178A JPS5543125A (en) | 1978-09-22 | 1978-09-22 | Preparation of polyamide foam |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5543125A true JPS5543125A (en) | 1980-03-26 |
Family
ID=14675412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11596178A Pending JPS5543125A (en) | 1978-09-22 | 1978-09-22 | Preparation of polyamide foam |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5543125A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57153031A (en) * | 1981-03-19 | 1982-09-21 | Ube Ind Ltd | Production of polyamide foam |
-
1978
- 1978-09-22 JP JP11596178A patent/JPS5543125A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57153031A (en) * | 1981-03-19 | 1982-09-21 | Ube Ind Ltd | Production of polyamide foam |
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