Inhibiting scale in vinyl monomer polymerization
US6300427A · kind A · utility
2Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Jan 4, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L61/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a method of inhibiting the formation of scale on reactor surfaces in contact with a polymerizing vinyl monomer comprising contacting said monomer with a terpolymer which comprises the condensation reaction product of PA1 (A) an aromatic compound that contains the group ##STR1## PA2 where Q is OR or SR and R is hydrogen, alkyl from C.sub.1 to C.sub.15, or aryl, alkaryl, or aralkyl from C.sub.6 to C.sub.15 : PA1 (B) about 0.1 to about 10 moles of a carbonyl compound per mole of said aromatic compound; and PA1 (C) about 0.1 to about 10 moles of a thiourea per mole of said aromatic compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.