IE41220B1 - Process for expanding thermoplastic polymers - Google Patents
Process for expanding thermoplastic polymersInfo
- Publication number
- IE41220B1 IE41220B1 IE540/75A IE54075A IE41220B1 IE 41220 B1 IE41220 B1 IE 41220B1 IE 540/75 A IE540/75 A IE 540/75A IE 54075 A IE54075 A IE 54075A IE 41220 B1 IE41220 B1 IE 41220B1
- Authority
- IE
- Ireland
- Prior art keywords
- carbonate
- polymer
- blowing agent
- zinc
- talc
- 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
1466427 Metal carbonate blowing agents FISONS Ltd 2 April 1975 [3 April 1974] 14763/74 Heading C3C Blowing agents, which are used to expand thermoplastic polymers, comprise as primary blowing agent (i.e. provides at least 50% by volume of the gas evolved on heating) a carbonate of zinc, lead, cadmium and/or lithium, with the proviso that where lead carbonate is used there is less than 2% by wt. of strong acid present in the composition and where lithium carbonate is used the polymer is not a polyamide, polymethyl methacrylate, polyvinyl chloride or an acrylonitrile/butadiene/styrene copolymer. Polymers are expanded by heating a composition containing the above blowing agent, e.g. to a temperature between 200 C. and the degradation temperature of the polymer and above the in situ decomposition temperature of the blowing agent and above the softening point of the polymer; the composition may be free from strong acid and contain a nucleating agent, e.g. a pigment, filler, magnesium or aluminium silicate, a clay, fumed oxide, silica or magnesium oxide. The polymer may be a polycarbonate, polyphenylene sulphide, polysulphone, polyamide, polyester or a styrene polymer. In the examples blowing agents consisting of basic zinc carbonate talc, and optionally palmitic, lauric, stearic or trimesic acids; zinc carbonate and optionally talc and lauric acid; basic cadmium carbonate (CdCO 3 .2CdO.3H 2 O) and talc; or zinc and potassium carbonate were used to expand a polycarbonate, acrylonitrile/butadiene/styrene copolymer, asbestos or glass fibre reinforced polypropylene, nylon 6, polystyrene, polypropylene, polyethylene, modified polyphenylene oxide or polyethersulphone, by feeding the mixtures into injection moulding machines. In an Example (11) the blowing agent was mixed with polyethylene and formed into pellets which were then used as the blowing agent.
[GB1466427A]
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 (2)
| Publication Number | Publication Date |
|---|---|
| IE41220L IE41220L (en) | 1975-10-03 |
| IE41220B1 true IE41220B1 (en) | 1979-11-07 |
Family
ID=10047062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE540/75A IE41220B1 (en) | 1974-04-03 | 1975-03-12 | 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 IE IE540/75A patent/IE41220B1/en unknown
- 1975-03-12 NO NO750830A patent/NO750830L/no unknown
- 1975-03-18 AU AU79229/75A patent/AU7922975A/en not_active Expired
- 1975-03-24 NL NL7503471A patent/NL7503471A/en not_active Application Discontinuation
- 1975-03-24 BE BE154676A patent/BE827088A/en unknown
- 1975-03-25 DE DE19752513033 patent/DE2513033A1/en not_active Withdrawn
- 1975-04-02 CH CH416175A patent/CH609996A5/en not_active IP Right Cessation
- 1975-04-02 ES ES436232A patent/ES436232A1/en not_active Expired
- 1975-04-02 FR FR7510329A patent/FR2266718B1/fr not_active Expired
- 1975-04-02 SE SE7503788A patent/SE7503788L/en unknown
- 1975-04-02 DK DK140975A patent/DK140975A/da not_active Application Discontinuation
- 1975-04-03 JP JP50039857A patent/JPS50140575A/ja active Pending
- 1975-04-03 CA CA000223820A patent/CA1184000A/en not_active Expired
- 1975-04-03 IT IT7521963A patent/IT1034815B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| CA1184000A (en) | 1985-03-12 |
| DK140975A (en) | 1975-10-04 |
| CH609996A5 (en) | 1979-03-30 |
| NO750830L (en) | 1975-10-06 |
| JPS50140575A (en) | 1975-11-11 |
| AU7922975A (en) | 1976-09-23 |
| IE41220L (en) | 1975-10-03 |
| BE827088A (en) | 1975-09-24 |
| FR2266718A1 (en) | 1975-10-31 |
| GB1466427A (en) | 1977-03-09 |
| AR207773A1 (en) | 1976-10-29 |
| NL7503471A (en) | 1975-10-07 |
| ES436232A1 (en) | 1977-08-01 |
| ZA751491B (en) | 1976-06-30 |
| DE2513033A1 (en) | 1975-10-16 |
| SE7503788L (en) | 1975-10-06 |
| FR2266718B1 (en) | 1979-01-12 |
| IT1034815B (en) | 1979-10-10 |
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