GB1238941A - - Google Patents
Info
- Publication number
- GB1238941A GB1238941A GB1238941DA GB1238941A GB 1238941 A GB1238941 A GB 1238941A GB 1238941D A GB1238941D A GB 1238941DA GB 1238941 A GB1238941 A GB 1238941A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lactam
- catalyst
- temperature
- heating
- composition
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/16—Preparatory processes
- C08G69/18—Anionic polymerisation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Polyamides (AREA)
Abstract
1,238,941. Foamable lactam compositions. FARBENFABRIKEN BAYER A.G. 17 Sept., 1968 [20 Oct., 1967], No. 44141/68. Headings C3C and C3R. Lactam compositions capable of being converted to polyamide foams are made by heating a lactam with a catalyst for lactam polymerization which is insoluble in the lactam at the melting temperature of the lactam, at such a temperature that the catalyst dissolves without the lactam polymerizing, then precipitating the catalyst by cooling with stirring to a temperature up to 15‹ C. above the melting point of the lactam, adding activators for lactam polymerization, blowing agents and pore regulators to the lactam at this temperature and then flaking off the melt thus obtained over a cooling roller. The lactam may be caprolactam, and the catalyst may be an alkali metal or alkaline earth metal formate. An isocyanate or adduct thereof, e.g. hexamethylene diisocyanate may serve as both an activator and a blowing agent. The composition may contain silica gel or tale as crystallization nuclei and a polysiloxane-oxyalkylene block copolymer as pore regular. A foam may be made by heating the composition.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19671720735 DE1720735A1 (en) | 1967-10-20 | 1967-10-20 | Process for the production of polyamide foaming mixtures |
| DEF0053843 | 1967-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1238941A true GB1238941A (en) | 1971-07-14 |
Family
ID=25754850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1238941D Expired GB1238941A (en) | 1967-10-20 | 1968-09-17 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE722514A (en) |
| CH (1) | CH504496A (en) |
| DE (1) | DE1720735A1 (en) |
| FR (1) | FR1595637A (en) |
| GB (1) | GB1238941A (en) |
| NL (1) | NL6814879A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2361452C2 (en) * | 1973-12-10 | 1985-03-07 | Bayer Ag, 5090 Leverkusen | Process for the production of polyamides with integral skin foam structure |
-
1967
- 1967-10-20 DE DE19671720735 patent/DE1720735A1/en active Pending
-
1968
- 1968-09-13 CH CH1369868A patent/CH504496A/en not_active IP Right Cessation
- 1968-09-17 GB GB1238941D patent/GB1238941A/en not_active Expired
- 1968-10-17 NL NL6814879A patent/NL6814879A/xx unknown
- 1968-10-18 FR FR1595637D patent/FR1595637A/fr not_active Expired
- 1968-10-18 BE BE722514D patent/BE722514A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1720735A1 (en) | 1971-07-15 |
| NL6814879A (en) | 1969-04-22 |
| CH504496A (en) | 1971-03-15 |
| FR1595637A (en) | 1970-06-15 |
| BE722514A (en) | 1969-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |