CA2309203A1 - Process for the preparation of brominated polystyrene having improved color characteristics - Google Patents
Process for the preparation of brominated polystyrene having improved color characteristics Download PDFInfo
- Publication number
- CA2309203A1 CA2309203A1 CA002309203A CA2309203A CA2309203A1 CA 2309203 A1 CA2309203 A1 CA 2309203A1 CA 002309203 A CA002309203 A CA 002309203A CA 2309203 A CA2309203 A CA 2309203A CA 2309203 A1 CA2309203 A1 CA 2309203A1
- Authority
- CA
- Canada
- Prior art keywords
- polystyrene
- brominating agent
- catalyst
- reactant
- brominated
- 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.)
- Granted
Links
Abstract
In a process for the preparation of brominated polystyrene, as an additive for polymer matrices to impart flame retardancy, including preparing a solution of a polystyrene reactant comprising from about 5 to about 20 percent by weight of a polystyrene reactant, in a halogenated hydrocarbon solvent; adding a Lewis acid bromination catalyst to form a solution; adding to the solution from about 1 to about 3.3 moles of a brominating agent, per mole of polystyrene repeating units, and reacting the polystyrene reactant with the brominating agent at a reaction temperature of from about -20 °C to about 50 °C;
wherein the improvement comprises controlling the color characteristics of the resultant brominated polystyrene by selecting a polystyrene reactant having a weight average molecular weight of from about 500 to about 1,500,000; selecting a catalytically effective amount of the catalyst on the basis of having a strength sufficient to effect at least monobromination of the polystyrene without inducing alkylation of the polystyrene by the halogenated hydrocarbon solvent; selecting a brominating agent from the group consisting of bromine chloride and bromine;
operating at the lowest possible temperature within the range, consistent with the brominating agent and the catalyst selected; and isolating the brominated polystyrene, wherein the color properties of the resultant brominated product are improved by selection and consideration of reaction time and temperature, catalyst, brominating agent and method of product isolation.
wherein the improvement comprises controlling the color characteristics of the resultant brominated polystyrene by selecting a polystyrene reactant having a weight average molecular weight of from about 500 to about 1,500,000; selecting a catalytically effective amount of the catalyst on the basis of having a strength sufficient to effect at least monobromination of the polystyrene without inducing alkylation of the polystyrene by the halogenated hydrocarbon solvent; selecting a brominating agent from the group consisting of bromine chloride and bromine;
operating at the lowest possible temperature within the range, consistent with the brominating agent and the catalyst selected; and isolating the brominated polystyrene, wherein the color properties of the resultant brominated product are improved by selection and consideration of reaction time and temperature, catalyst, brominating agent and method of product isolation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1997/021240 WO1999025746A1 (en) | 1996-06-14 | 1997-11-18 | Process for the preparation of brominated polystyrene having improved color characteristics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2309203A1 true CA2309203A1 (en) | 1999-05-27 |
| CA2309203C CA2309203C (en) | 2007-07-03 |
Family
ID=22262107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002309203A Expired - Fee Related CA2309203C (en) | 1997-11-18 | 1997-11-18 | Process for the preparation of brominated polystyrene having improved color characteristics |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4109417B2 (en) |
| AU (1) | AU5449998A (en) |
| CA (1) | CA2309203C (en) |
| DE (1) | DE69739318D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117247482A (en) * | 2023-11-17 | 2023-12-19 | 山东旭锐新材股份有限公司 | High-thermal-stability brominated polystyrene synthesis method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101213220B (en) * | 2005-06-30 | 2012-05-09 | 雅宝公司 | Brominated styrenic polymers and their preparation |
-
1997
- 1997-11-18 CA CA002309203A patent/CA2309203C/en not_active Expired - Fee Related
- 1997-11-18 AU AU54499/98A patent/AU5449998A/en not_active Abandoned
- 1997-11-18 DE DE69739318T patent/DE69739318D1/en not_active Expired - Lifetime
- 1997-11-18 JP JP2000521125A patent/JP4109417B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117247482A (en) * | 2023-11-17 | 2023-12-19 | 山东旭锐新材股份有限公司 | High-thermal-stability brominated polystyrene synthesis method |
| CN117247482B (en) * | 2023-11-17 | 2024-02-20 | 山东旭锐新材股份有限公司 | High-thermal-stability brominated polystyrene synthesis method |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2309203C (en) | 2007-07-03 |
| DE69739318D1 (en) | 2009-04-30 |
| AU5449998A (en) | 1999-06-07 |
| JP2001523738A (en) | 2001-11-27 |
| JP4109417B2 (en) | 2008-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20151118 |