GB928656A - Process of preparing cellular materials - Google Patents
Process of preparing cellular materialsInfo
- Publication number
- GB928656A GB928656A GB4422461A GB4422461A GB928656A GB 928656 A GB928656 A GB 928656A GB 4422461 A GB4422461 A GB 4422461A GB 4422461 A GB4422461 A GB 4422461A GB 928656 A GB928656 A GB 928656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blowing agent
- blowing
- polymer
- cross
- normally solid
- 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
- C08J9/10—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 nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
A process for preparing cellular material from normally solid thermoplastic aliphatic olefin polymers comprises homogenizing the polymer with at least one normally solid blowing agent and a cross-linking agent and heating the homogeneous composition in a mould at a temperature of from 80 DEG to 250 DEG C. at which the blowing agent decomposes to liberate the gas producing the blowing action. Preferably the polymer is a polyethylene of molecular weight 50,000 to 300,000, obtained by the lowpressure process, or 10,000 to 40,000 produced by the high-pressure process. p,p1-Oxy-bis(benzene-sulphohydrazide, azodicarbamide or dinitrisopentamethylene tetramine are preferred blowing agents. The cross-linking agents are defined as peroxides, hydroperoxides or their esters or mixtures thereof. A pressure exerted from outside by an inert gas or vapour can be used to prevent the gas developed by the blowing agent from leaving the material. Zinc, magnesium, calcium, cadmium and butyl stearates are specified as additives to retard the expansion and give more homogeneous cell distribution.ALSO:A process for preparing cellular material from normally solid thermoplastic aliphatic olefin polymers comprises homogenising the polymer with at least one normally solid blowing agent and a cross-linking agent and heating the homogeneous composition in a mould at a temperature of from 80 DEG C. to 250 DEG C. at which the blowing agent decomposes to liberate the gas producing the blowing action. Preferably the polymer is a polyethylene of molecular weight 50,000 to 300,000 obtained by the low pressure process or 10,000 to 40,000 by the high-pressure process p, p1- oxy-bis (benzene-sulphohydrazide), azodicarbamide or dinitrosopenta-methylene tetramine are preferred blowing agents. The cross-linking agents are defined as peroxides, hydroperoxides or their esters or mixtures thereof. A pressure exerted from outside by an inert gas can be used to prevent the gas developed by the blowing agent from leaving the material. Stearates of zinc, magnesium, calcium and cadmium and butyl steorate are specified as additives to retard the expansion and give more homogeneous cell distribution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2152860 | 1960-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB928656A true GB928656A (en) | 1963-06-12 |
Family
ID=11183136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4422461A Expired GB928656A (en) | 1960-12-15 | 1961-12-11 | Process of preparing cellular materials |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE611525A (en) |
| ES (1) | ES272978A1 (en) |
| GB (1) | GB928656A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1544973B1 (en) * | 1964-06-05 | 1970-08-27 | Grace W R & Co | Process for the production of foamable molding compounds in the form of a powder or granulate |
| EP0181637A2 (en) * | 1984-11-16 | 1986-05-21 | The Dow Chemical Company | Process for making lightly crosslinked linear polymer foams |
| WO1986003759A1 (en) * | 1984-12-21 | 1986-07-03 | Union Carbide Corporation | Olefin polymer foams |
-
1961
- 1961-12-11 GB GB4422461A patent/GB928656A/en not_active Expired
- 1961-12-14 ES ES0272978A patent/ES272978A1/en not_active Expired
- 1961-12-14 BE BE611525A patent/BE611525A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1544973B1 (en) * | 1964-06-05 | 1970-08-27 | Grace W R & Co | Process for the production of foamable molding compounds in the form of a powder or granulate |
| EP0181637A2 (en) * | 1984-11-16 | 1986-05-21 | The Dow Chemical Company | Process for making lightly crosslinked linear polymer foams |
| EP0181637A3 (en) * | 1984-11-16 | 1988-05-25 | The Dow Chemical Company | Lightly crosslinked linear olefinic polymer foams and process for making |
| WO1986003759A1 (en) * | 1984-12-21 | 1986-07-03 | Union Carbide Corporation | Olefin polymer foams |
Also Published As
| Publication number | Publication date |
|---|---|
| BE611525A (en) | 1962-03-30 |
| ES272978A1 (en) | 1962-05-01 |
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