ES457832A2 - Reducing vinyl chloride content of PVC powders - by mixing and heating in high speed mixer with continuous or portionwise addn. of water - Google Patents
Reducing vinyl chloride content of PVC powders - by mixing and heating in high speed mixer with continuous or portionwise addn. of waterInfo
- Publication number
- ES457832A2 ES457832A2 ES457832A ES457832A ES457832A2 ES 457832 A2 ES457832 A2 ES 457832A2 ES 457832 A ES457832 A ES 457832A ES 457832 A ES457832 A ES 457832A ES 457832 A2 ES457832 A2 ES 457832A2
- Authority
- ES
- Spain
- Prior art keywords
- degrees
- vinyl chloride
- water
- heating
- mixing
- 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
- C08F6/00—Post-polymerisation treatments
- C08F6/001—Removal of residual monomers by physical means
- C08F6/005—Removal of residual monomers by physical means from solid polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
PVC powder compsns. with low vinyl chloride monomer content are made by subjecting the PVC, opt. together with known additives such as stabilisers, plasticisers, fillers, pigments and modifiers, to intensive mechanical mixing while simultaneously heating it to a final temp. of >=70 degrees C and with the addn. of water, either portionwise or continuously, before the mixt. reaches the final temp. - Pref. 1-10 wt% water is added and the final temp. is 140 degrees C. The water may be added e.g. in 2-4 virtually equal portions, the first portion being added at about 70-80 degrees C and the remaining portions at 10-30 degrees intervals in the range 80-120 degrees C, or continuously, starting at about 70 degrees C and finishining at about 120 degrees C. The heating may be completely or substantially caused by the intensive mixing. - The process gives good removal of vinyl chloride monomer from the powder compsns. and gives prods. which can be processed without releasing toxic vinyl chloride vapours into the atmos.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762617497 DE2617497C3 (en) | 1976-04-22 | 1976-04-22 | Process for the production of ready-to-use pulverulent mixtures based on vinyl chloride polymers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES457832A2 true ES457832A2 (en) | 1978-07-16 |
Family
ID=5975890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES457832A Expired ES457832A2 (en) | 1976-04-22 | 1977-04-15 | Reducing vinyl chloride content of PVC powders - by mixing and heating in high speed mixer with continuous or portionwise addn. of water |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS52129755A (en) |
| AT (1) | AT351258B (en) |
| BE (1) | BE853888R (en) |
| DE (1) | DE2617497C3 (en) |
| ES (1) | ES457832A2 (en) |
| IT (1) | IT1114403B (en) |
| NL (1) | NL7704159A (en) |
-
1976
- 1976-04-22 DE DE19762617497 patent/DE2617497C3/en not_active Expired
-
1977
- 1977-04-15 ES ES457832A patent/ES457832A2/en not_active Expired
- 1977-04-15 NL NL7704159A patent/NL7704159A/en not_active Application Discontinuation
- 1977-04-20 IT IT2266577A patent/IT1114403B/en active
- 1977-04-21 JP JP4523777A patent/JPS52129755A/en active Pending
- 1977-04-21 AT AT278177A patent/AT351258B/en not_active IP Right Cessation
- 1977-04-22 BE BE176958A patent/BE853888R/en active
Also Published As
| Publication number | Publication date |
|---|---|
| BE853888R (en) | 1977-10-24 |
| DE2617497C3 (en) | 1980-10-09 |
| AT351258B (en) | 1979-07-10 |
| NL7704159A (en) | 1977-10-25 |
| DE2617497A1 (en) | 1977-11-03 |
| ATA278177A (en) | 1978-12-15 |
| DE2617497B2 (en) | 1979-05-10 |
| IT1114403B (en) | 1986-01-27 |
| JPS52129755A (en) | 1977-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD2A | Announcement of lapse in spain |
Effective date: 20170706 |