GB840899A - Improvements in the preparation of thermoplastic resin particles - Google Patents
Improvements in the preparation of thermoplastic resin particlesInfo
- Publication number
- GB840899A GB840899A GB24405/57A GB2440557A GB840899A GB 840899 A GB840899 A GB 840899A GB 24405/57 A GB24405/57 A GB 24405/57A GB 2440557 A GB2440557 A GB 2440557A GB 840899 A GB840899 A GB 840899A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solvent
- polymer
- inert liquid
- bulk density
- nonsolvent
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/16—Powdering or granulating by coagulating dispersions
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
High-bulk density thermoplastic polymeric resin particles are made by mixing low-bulk density thermoplastic resin powders of polyolefins or vinyl halide polymers with a solvent to form a gel-like to fluid solution, agitating the solution with an inert liquid which is a nonsolvent for the polymer and the polymer solvent while heating to below the melting temperature of the polymer, controlling the agitation so that the gel-like to fluid solution is dispersed throughout the inert liquid to form droplets from 0.02 to 0.25 inch average diameter, evaporating the solvent from the droplets at below the melting temperature of the polymer while maintaining a two-phase system by replacing inert liquid lost by co-evaporation with the polymer solvent, and separating the resulting high-bulk density particles from the inert liquid. Specified resins are polyethylene, polypropylene and vinyl chloride-acetate copolymer. The solvent is preferably capable of being steam distilled, e.g. toluene, xylene, hexane, heptane and kerosene and the nonsolvent is preferably water. The polyolefins may be prepared by the low-pressure process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US840899XA | 1956-08-03 | 1956-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB840899A true GB840899A (en) | 1960-07-13 |
Family
ID=22182819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24405/57A Expired GB840899A (en) | 1956-08-03 | 1957-08-01 | Improvements in the preparation of thermoplastic resin particles |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1188504A (en) |
| GB (1) | GB840899A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2588263B1 (en) * | 1985-10-09 | 1988-05-27 | Centre Nat Rech Scient | PROCESS FOR THE MANUFACTURE OF SEMICRYSTALLINE POLYMER PARTICLES OF CONTROLLED GRANULOMETRY, PRODUCTS OBTAINED AND APPLICATION THEREOF |
-
1957
- 1957-07-29 FR FR1188504D patent/FR1188504A/en not_active Expired
- 1957-08-01 GB GB24405/57A patent/GB840899A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1188504A (en) | 1959-09-23 |
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