ES351406A1 - Improvements in or relating to Suspension Polymerization Processes - Google Patents
Improvements in or relating to Suspension Polymerization ProcessesInfo
- Publication number
- ES351406A1 ES351406A1 ES351406A ES351406A ES351406A1 ES 351406 A1 ES351406 A1 ES 351406A1 ES 351406 A ES351406 A ES 351406A ES 351406 A ES351406 A ES 351406A ES 351406 A1 ES351406 A1 ES 351406A1
- Authority
- ES
- Spain
- Prior art keywords
- sodium
- monomer
- sulphite
- phosphate
- substituted
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polymerisation Methods In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerization Catalysts (AREA)
Abstract
Polymer beads are produced by heating a suspension of an aromatic compound, substituted by at least one vinyl or [alpha]-substituted vinyl group, containing an oil-soluble free radical initiator in an aq. medium with the aid of a finely divided phosphate suspending agent, which requires more than 100 parts by wt. of water to dissolve one part by wt. thereof, and at least 0À0003% by wt. based on the monomer, of a water soluble sulphite, or a compound which under the polymerization conditions will form such a sulphite, is added to the suspension before the monomer has polymerized to the bead identity point. The monomer may be styrene with optionally 2-ethyl-hexyl acrylate. The initiator may be a mixture of benzoyl peroxide and t-butyl perbenzoate or azobisisobutyronitrile. The phosphate may be tricalcium phosphate. The sulphite or precursor thereof may be sodium bisulphite, sodium or potassium metabisulphite, sodium hydrosulphite or -sulphide, sodium formaldehyde sulphoxylate or sulphurous acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64159667A | 1967-05-26 | 1967-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES351406A1 true ES351406A1 (en) | 1969-06-01 |
Family
ID=24573039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES351406A Expired ES351406A1 (en) | 1967-05-26 | 1968-03-09 | Improvements in or relating to Suspension Polymerization Processes |
Country Status (9)
| Country | Link |
|---|---|
| BR (1) | BR6898598D0 (en) |
| DE (1) | DE1770411A1 (en) |
| DK (1) | DK120507B (en) |
| ES (1) | ES351406A1 (en) |
| FI (1) | FI47582C (en) |
| FR (1) | FR1566946A (en) |
| GB (1) | GB1188252A (en) |
| NO (1) | NO125729B (en) |
| SE (1) | SE348743B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100801275B1 (en) | 2006-03-31 | 2008-02-04 | 금호석유화학 주식회사 | Method for producing expandable polystyrene beads which have excellent heat insulation properties |
| CN116023672B (en) * | 2022-12-15 | 2024-02-06 | 江阴市星宇化工有限公司 | Composite filler of tricalcium phosphate special for polymerization and preparation method thereof |
-
1968
- 1968-03-09 ES ES351406A patent/ES351406A1/en not_active Expired
- 1968-04-25 BR BR19859868A patent/BR6898598D0/en unknown
- 1968-05-14 DE DE19681770411 patent/DE1770411A1/en not_active Withdrawn
- 1968-05-20 FR FR1566946D patent/FR1566946A/fr not_active Expired
- 1968-05-24 DK DK243568A patent/DK120507B/en not_active IP Right Cessation
- 1968-05-24 SE SE701568A patent/SE348743B/xx unknown
- 1968-05-24 FI FI144968A patent/FI47582C/en active
- 1968-05-24 NO NO204268A patent/NO125729B/no unknown
- 1968-05-27 GB GB2535068A patent/GB1188252A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FI47582B (en) | 1973-10-01 |
| DE1770411A1 (en) | 1971-10-21 |
| SE348743B (en) | 1972-09-11 |
| FR1566946A (en) | 1969-05-09 |
| NO125729B (en) | 1972-10-23 |
| BR6898598D0 (en) | 1973-01-04 |
| FI47582C (en) | 1974-01-10 |
| DK120507B (en) | 1971-06-07 |
| GB1188252A (en) | 1970-04-15 |
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