GB1181617A - Process and Apparatus for Continuous Production of Homogeneous Polyamide Foams. - Google Patents
Process and Apparatus for Continuous Production of Homogeneous Polyamide Foams.Info
- Publication number
- GB1181617A GB1181617A GB4479668A GB4479668A GB1181617A GB 1181617 A GB1181617 A GB 1181617A GB 4479668 A GB4479668 A GB 4479668A GB 4479668 A GB4479668 A GB 4479668A GB 1181617 A GB1181617 A GB 1181617A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prepolymer
- continuous production
- polymerizing
- foaming
- mould
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Polyamides (AREA)
Abstract
1,181,617. Continuous production of polyamide foams. FARBENFABRIKEN BAYER A.G. 20 Sept., 1968 [20 Oct., 1967], No. 44796/68. Headings C3C and C3R. Polyamide foam is continuously produced by melting a mixture of a lactam, e.g. caprolactam, with a catalyst, e.g. an alkali metal or alkaline earth metal formate, and an activator and an expanding or a compound which functions as both, e.g. an isocyanate, polymerizing the melt with vigorous stirring to form a prepolymer having a relative viscosity of 1À15-2À5 (as a solution of 1 g. of prepolymer in 100 ml. mcresol at 20‹ C.), transferring the prepolymer to a mould and polymerizing to completion with shaping and foaming. In the example caprolactam, sodium formate and a silica gel are heated, the melt is cooled and hexamethylene diisocyanate and an alkylene oxide-silicone block copolymer (as pore regulator) are added, the mixture is melted, fed to a reactor, stirred and the prepolymer produced is then fed to a mould where it is polymerized to completion with foaming. An apparatus is illustrated (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF0053844 | 1967-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1181617A true GB1181617A (en) | 1970-02-18 |
Family
ID=7106639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4479668A Expired GB1181617A (en) | 1967-10-20 | 1968-09-20 | Process and Apparatus for Continuous Production of Homogeneous Polyamide Foams. |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE722515A (en) |
| CH (1) | CH503079A (en) |
| DE (1) | DE1720736A1 (en) |
| ES (1) | ES359331A1 (en) |
| FR (1) | FR1588711A (en) |
| GB (1) | GB1181617A (en) |
| NL (1) | NL6814880A (en) |
| SU (1) | SU402227A3 (en) |
-
1967
- 1967-10-20 DE DE19671720736 patent/DE1720736A1/en active Pending
-
1968
- 1968-09-13 CH CH1369668A patent/CH503079A/en not_active IP Right Cessation
- 1968-09-20 GB GB4479668A patent/GB1181617A/en not_active Expired
- 1968-10-17 NL NL6814880A patent/NL6814880A/xx unknown
- 1968-10-18 FR FR1588711D patent/FR1588711A/fr not_active Expired
- 1968-10-18 BE BE722515D patent/BE722515A/xx unknown
- 1968-10-18 SU SU1279001A patent/SU402227A3/ru active
- 1968-10-19 ES ES359331A patent/ES359331A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL6814880A (en) | 1969-04-22 |
| CH503079A (en) | 1971-02-15 |
| BE722515A (en) | 1969-04-01 |
| FR1588711A (en) | 1970-04-17 |
| DE1720736A1 (en) | 1971-07-15 |
| SU402227A3 (en) | 1973-10-12 |
| ES359331A1 (en) | 1970-06-01 |
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