GB981342A - Flame retardant resins - Google Patents
Flame retardant resinsInfo
- Publication number
- GB981342A GB981342A GB302762A GB302762A GB981342A GB 981342 A GB981342 A GB 981342A GB 302762 A GB302762 A GB 302762A GB 302762 A GB302762 A GB 302762A GB 981342 A GB981342 A GB 981342A
- Authority
- GB
- United Kingdom
- Prior art keywords
- styrene
- particles
- treated
- natural
- butadiene
- 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
- C08J9/35—Composite foams, i.e. continuous macromolecular foams containing discontinuous cellular particles or fragments
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/18—Introducing halogen atoms or halogen-containing groups
- C08F8/20—Halogenation
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/2053—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the additives only being premixed with a liquid phase
Abstract
An aqueous dispersion of an organic bromine containing flame retardant is treated with a precipitating agent in the presence of particles of a synthetic resin such that the flame retardant is deposited on to the resin particles. Specified resins are homo- or co-polymers of:-olefines, e.g. ethylene, propylene, butylene, styrene or a -methylstyrene; acrylates, e.g. methyl methacrylate; vinyl esters, e.g. vinyl acetate, and copolymers or mixtures of the above with acrylonitrile, butadiene or isoprene. The polystyrene may contain natural or synthetic rubber and/or a chemical or physical blowing agent. Particles of the resin may be formed by chopping up an extruded resin filament; or by direct coagulation after a suspension polymerization process. Specified flame retardants are tris-(2,3 - dibromopropyl) phosphate, a brominated natural rubber latex or a bromine containing homo- or co-polymer of a diene such as butadiene, isoprene or chloroprene. A flame-retardant precursor may first be dispersed in water and then brominated. An adhesive, e.g. natural or synthetic rubber or a styrene/butadiene copolymer, and a buffer, e.g. tetrasodium pyrophosphate, may be added prior to halogenation. Precipitation may be effected by a decrease of pH, e.g. by adding H2SO4 or HCl, or by adding an electrolyte, e.g. potash, alum or NaC1. Precipitation and bromination may be effected simultaneously, the HBr formed during bromination effecting precipitation. The treated particles should contain 1-5% Br. In the examples, latices of styrene/butadiene copolymers (60 and 23% styrene respectively) were brominated using a tetrasodium pyrophosphate as buffer and precipitated on to polystyrene beads containing pentane with dilute H2SO4, the treated beads being foamed with steam and moulded into blocks; and natural rubber latex was added to polystyrene beads, containing pentane, suspended in bromine water, the treated beads being foamed and moulded.ALSO:An aqueous dispersion of an organic bromine-containing flame retardant is treated with a precipitating agent in the presence of particles of a synthetic resin such that the flame retardant is deposited on the resin particles. Specified resins are homo- or copolymers of: olfines, e.g. ethylene, propylene, butylene, styrene or a -methylstyrene; acrylates, e.g. methyl methacrylate; vinyl esters, e.g. vinyl acetate and mixtures thereof. The polystyrene may contain natural or synthetic rubber. Flame retardants specified are: tris-(2,3-dibromo-propyl)-phosphate, brominated natural rubber and bromine-containing homo- or copolymers of dienes, e.g. butadiene, isoprene or chloroprene. An adhesive, e.g. a natural or synthetic rubber or a styrene/butadiene copolymer and a buffer, e.g. tetrasodium pyrophosphate, may be added. Precipitation may be effected by a decrease in pH, e.g. by adding H2SO4 or HCl or by adding an electrolyte such as potash, alum or NaCl. The treated particles may contain 1-5% Br. In Examples (1 and 2) a latex of a styrene/butadiene copolymer was brominated and precipitated on to polystyrene beads. In Example (3) a natural rubber latex was added to polystyrene beads in bromine water.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB705162A GB1016904A (en) | 1962-02-23 | 1962-02-23 | Process for imparting flame-retarding properties |
Publications (1)
Publication Number | Publication Date |
---|---|
GB981342A true GB981342A (en) | 1965-01-27 |
Family
ID=9825699
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB302762A Expired GB981342A (en) | 1962-02-23 | 1962-01-26 | Flame retardant resins |
GB705162A Expired GB1016904A (en) | 1962-02-23 | 1962-02-23 | Process for imparting flame-retarding properties |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB705162A Expired GB1016904A (en) | 1962-02-23 | 1962-02-23 | Process for imparting flame-retarding properties |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB981342A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018210961A1 (en) * | 2017-05-17 | 2018-11-22 | Basf Se | Brominated flame retardant |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115044140B (en) * | 2022-07-01 | 2024-02-02 | 安徽卡洛塑业科技有限公司 | Preparation process of environment-friendly flame-retardant polystyrene material |
-
1962
- 1962-01-26 GB GB302762A patent/GB981342A/en not_active Expired
- 1962-02-23 GB GB705162A patent/GB1016904A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018210961A1 (en) * | 2017-05-17 | 2018-11-22 | Basf Se | Brominated flame retardant |
Also Published As
Publication number | Publication date |
---|---|
GB1016904A (en) | 1966-01-12 |
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