GB866038A - Polyvinyl acetate powder and method of making the same - Google Patents
Polyvinyl acetate powder and method of making the sameInfo
- Publication number
- GB866038A GB866038A GB30426/58A GB3042658A GB866038A GB 866038 A GB866038 A GB 866038A GB 30426/58 A GB30426/58 A GB 30426/58A GB 3042658 A GB3042658 A GB 3042658A GB 866038 A GB866038 A GB 866038A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyvinyl acetate
- spray
- drying
- emulsion
- inert material
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- 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
- C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
- C08J3/212—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase and solid additives
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- 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
- C08J2331/00—Characterised by the use of copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid
- C08J2331/02—Characterised by the use of omopolymers or copolymers of esters of monocarboxylic acids
- C08J2331/04—Homopolymers or copolymers of vinyl acetate
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A dry polyvinyl acetate powder, which can be reconstituted upon the addition of water to form an emulsion having substantially the properties of the original aqueous emulsion from which it is obtained, is prepared by spray-drying the aqueous emulsion and, before the polyvinyl acetate is completely dried, adding thereto an inert material, the drying of the polyvinyl acetate being completed in the presence of the inert material. Inert materials are exemplified by pigments and fillers such as clay, talc, calcium carbonate, silica, diatomaceous earth and titanium dioxide. Not less than 5% of inert material, based on the weight of the dried polyvinyl acetate powder, is employed. Preferred polyvinyl acetate emulsions are those in which the polyvinyl acetate particles have an average grain size of 2-8 microns and provide a solids content of 15-35%. Polyvinyl alcohol of low viscosity may be added as a stabilizer to the emulsion before spray-drying, the alcohol content being at least 10% by weight of the total solids present in the emulsion. A plasticizer may be incorporated into the dry polyvinyl acetate powder by mixing the plasticizer with an inert carrier and adding the mix to the polyvinyl acetate after the latter has been spray-dried or before the latter is completely dried by the spray-drying process. In either case inert material is also employed. Plasticizers exemplified are dipropylene glycol dibenzoate, dibutyl phthalate, and the mono-ethyl ether of diethylene glycol acetate. Inert carriers are preferred which have high absorptive capacity for the plasticizer, e.g. calcium silicate. Spray-drying is effected with maximum air inlet and outlet temperatures of 300 DEG F. and 130 DEG F.ALSO:<PICT:0866038/III/1> A dry polyvinyl acetate powder, which can be reconstituted upon the addition of water to form an emulsion having substantially the properties of the original aqueous emulsion from which it is obtained, is prepared by spray-drying the aqueous emulsion and, before the polyvinyl acetate is completely dried, adding thereto an inert material, the drying of the polyvinyl acetate being completed in the presence of the inert material. In Fig. 1 emulsion to be dried is fed into an atomizing device and hot air at a temperature not exceeding 300 DEG F. forces the spray into a vortex. Inert material is fed through a cold air inlet 4 which admits cooling air to control the drying temperature. The dried emulsion is removed through an outlet 3 at a temperature not greater than 130 DEG F. In another apparatus the spray chamber is wholly cylindrical and a vibrator hopper feeds inert material into the top of the chamber. In addition to inert materials (e.g. clay, talc, calcium carbonate, silica, diatomaceous earth and titanium dioxide) plasticizers mixed with or absorbed upon an inert carrier, and also polyvinyl alcohol, may be incorporated in the polyvinyl acetate powder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US866038XA | 1957-10-18 | 1957-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB866038A true GB866038A (en) | 1961-04-26 |
Family
ID=22199667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30426/58A Expired GB866038A (en) | 1957-10-18 | 1958-09-23 | Polyvinyl acetate powder and method of making the same |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1211157A (en) |
| GB (1) | GB866038A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0841364A1 (en) * | 1996-11-06 | 1998-05-13 | Basf Aktiengesellschaft | Powdery polymercompositions |
| DE102006053375A1 (en) * | 2006-11-10 | 2008-05-15 | Boehringer Ingelheim Pharma Gmbh & Co. Kg | Process for mixing powders |
| EP1811008A3 (en) * | 2006-01-18 | 2009-12-16 | Joseph Iannicelli | Method and composition for controlled heat release and disposable chemical heater utilizing same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2214410C3 (en) * | 1972-03-24 | 1978-10-12 | Hoechst Ag, 6000 Frankfurt | Process for the production of a redispersible vinyl acetate / ethylene polymer dispersion powder |
| DE4422438A1 (en) * | 1994-06-29 | 1996-01-04 | Hoechst Ag | Device and method for adding aggregates to disk atomizing dryers |
-
1958
- 1958-09-23 GB GB30426/58A patent/GB866038A/en not_active Expired
- 1958-10-13 FR FR1211157D patent/FR1211157A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0841364A1 (en) * | 1996-11-06 | 1998-05-13 | Basf Aktiengesellschaft | Powdery polymercompositions |
| US6143808A (en) * | 1996-11-06 | 2000-11-07 | Basf Aktiengesellschaft | Polymer compositions in powder form |
| AU743886B2 (en) * | 1996-11-06 | 2002-02-07 | Basf Aktiengesellschaft | Polymer compositions in powder form |
| EP1811008A3 (en) * | 2006-01-18 | 2009-12-16 | Joseph Iannicelli | Method and composition for controlled heat release and disposable chemical heater utilizing same |
| US8080172B2 (en) | 2006-01-18 | 2011-12-20 | J.I. Enterprises, Inc. | Method and composition for controlled heat release and disposable chemical heater utilizing same |
| DE102006053375A1 (en) * | 2006-11-10 | 2008-05-15 | Boehringer Ingelheim Pharma Gmbh & Co. Kg | Process for mixing powders |
| WO2008055951A1 (en) | 2006-11-10 | 2008-05-15 | Boehringer Ingelheim Pharma Gmbh & Co. Kg | Method for mixing powders |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1211157A (en) | 1960-03-14 |
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