Process for producing a polymer by polymerization of a monomer having an ethylenic double bond
US6335403B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Jun 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/004
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a polymer by polymerizing in a polymerization vessel a monomer having an ethylenic double bond is provided. In this process, the polymerization vessel has a polymer scale preventive coating film on its inner wall surfaces and other surfaces with which the monomer comes into contact during polymerization. The coating film is formed by coating a first coating liquid containing a compound selected from the group consisting of an aromatic compound having 5 or more conjugated <CUSTOM-CHARACTER FILE="US06335403-20020101-P00001.TIF" ID="CUSTOM-CHARACTER-00001"> bonds and a heterocyclic compound having 5 or more conjugated <CUSTOM-CHARACTER FILE="US06335403-20020101-P00001.TIF" ID="CUSTOM-CHARACTER-00002"> bonds and a second coating liquid containing at least one hydrophilic compound selected from the group consisting of a water-soluble polymeric compound, an inorganic colloid, an inorganic salt and an acid; the first coating liquid and the second coating liquid being simultaneously coated by means of steam as a carrier. This process can shorten the time for forming coating films of scale preventive agents to improve productivity, can improve the effect of preventin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.