CH609996A5 - Process for expanding thermoplastic polymers - Google Patents
Process for expanding thermoplastic polymersInfo
- Publication number
- CH609996A5 CH609996A5 CH416175A CH416175A CH609996A5 CH 609996 A5 CH609996 A5 CH 609996A5 CH 416175 A CH416175 A CH 416175A CH 416175 A CH416175 A CH 416175A CH 609996 A5 CH609996 A5 CH 609996A5
- Authority
- CH
- Switzerland
- Prior art keywords
- expansion
- polymer
- strong acid
- blowing
- agent
- Prior art date
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
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Neutral or basic zinc or cadmium carbonate is employed as blowing agent with a pulverulent nucleating agent which promotes the formation of gas bubbles, especially talc. The expansion is produced by heating the mixture of polymer, blowing agent and nucleating agent in the absence of any strong acid. This eliminates the risk of deterioration of the polymer which is encountered in processes employing blowing agents which release ammonia or blowing agents comprising sodium carbonate and a strong acid. The process applies very particularly to the expansion of polymers whose processing requires a temperature above 200 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1476374A GB1466427A (en) | 1974-04-03 | 1974-04-03 | Process for expanding thermoplastic polymers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH609996A5 true CH609996A5 (en) | 1979-03-30 |
Family
ID=10047062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH416175A CH609996A5 (en) | 1974-04-03 | 1975-04-02 | Process for expanding thermoplastic polymers |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS50140575A (en) |
| AR (1) | AR207773A1 (en) |
| AU (1) | AU7922975A (en) |
| BE (1) | BE827088A (en) |
| CA (1) | CA1184000A (en) |
| CH (1) | CH609996A5 (en) |
| DE (1) | DE2513033A1 (en) |
| DK (1) | DK140975A (en) |
| ES (1) | ES436232A1 (en) |
| FR (1) | FR2266718B1 (en) |
| GB (1) | GB1466427A (en) |
| IE (1) | IE41220B1 (en) |
| IT (1) | IT1034815B (en) |
| NL (1) | NL7503471A (en) |
| NO (1) | NO750830L (en) |
| SE (1) | SE7503788L (en) |
| ZA (1) | ZA751491B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1100697A (en) * | 1976-12-22 | 1981-05-05 | General Electric Company | Foamable thermoplastic polyester compositions |
| JPS6045656B2 (en) * | 1979-06-29 | 1985-10-11 | 三井東圧化学株式会社 | Foamable thermoplastic resin composition |
| US4711921A (en) * | 1982-11-12 | 1987-12-08 | The B. F. Goodrich Company | Stabilization of vinyl chloride polymers |
| DE102009050807A1 (en) * | 2009-10-27 | 2011-06-30 | Bayerische Motoren Werke Aktiengesellschaft, 80809 | Injection molding tool has tool lower part and tool upper part displaceable in process direction, and affecting or sealing surfaces |
| JP2019189830A (en) * | 2018-04-27 | 2019-10-31 | 日立化成テクノサービス株式会社 | Polycarbonate extrusion chemical foam and method for producing the same |
-
1974
- 1974-04-03 GB GB1476374A patent/GB1466427A/en not_active Expired
-
1975
- 1975-01-01 AR AR258223A patent/AR207773A1/en active
- 1975-03-11 ZA ZA00751491A patent/ZA751491B/en unknown
- 1975-03-12 NO NO750830A patent/NO750830L/no unknown
- 1975-03-12 IE IE540/75A patent/IE41220B1/en unknown
- 1975-03-18 AU AU79229/75A patent/AU7922975A/en not_active Expired
- 1975-03-24 BE BE154676A patent/BE827088A/en unknown
- 1975-03-24 NL NL7503471A patent/NL7503471A/en not_active Application Discontinuation
- 1975-03-25 DE DE19752513033 patent/DE2513033A1/en not_active Withdrawn
- 1975-04-02 DK DK140975A patent/DK140975A/da not_active Application Discontinuation
- 1975-04-02 FR FR7510329A patent/FR2266718B1/fr not_active Expired
- 1975-04-02 ES ES436232A patent/ES436232A1/en not_active Expired
- 1975-04-02 CH CH416175A patent/CH609996A5/en not_active IP Right Cessation
- 1975-04-02 SE SE7503788A patent/SE7503788L/en unknown
- 1975-04-03 CA CA000223820A patent/CA1184000A/en not_active Expired
- 1975-04-03 JP JP50039857A patent/JPS50140575A/ja active Pending
- 1975-04-03 IT IT7521963A patent/IT1034815B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| GB1466427A (en) | 1977-03-09 |
| FR2266718A1 (en) | 1975-10-31 |
| BE827088A (en) | 1975-09-24 |
| IE41220L (en) | 1975-10-03 |
| ZA751491B (en) | 1976-06-30 |
| CA1184000A (en) | 1985-03-12 |
| AR207773A1 (en) | 1976-10-29 |
| IT1034815B (en) | 1979-10-10 |
| NO750830L (en) | 1975-10-06 |
| ES436232A1 (en) | 1977-08-01 |
| SE7503788L (en) | 1975-10-06 |
| AU7922975A (en) | 1976-09-23 |
| IE41220B1 (en) | 1979-11-07 |
| FR2266718B1 (en) | 1979-01-12 |
| DK140975A (en) | 1975-10-04 |
| NL7503471A (en) | 1975-10-07 |
| JPS50140575A (en) | 1975-11-11 |
| DE2513033A1 (en) | 1975-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |