Process for producing anhydride-containing polymers for radiation sensitive compositions
US6803434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2003 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Apr 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0758
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A synthetic process comprising the following steps: providing a reaction mixture comprising: an ethylenically unsaturated anhydride monomer, at least one ethylenically unsaturated non-anhydride monomer, a free radical initiator, and an alkyl substituted THF solvent having the general structure of formula 1: where R1, R2, R3, and R4 are independently chosen from the group hydrogen and C1-C4 linear or branched alkyl with the proviso that at least one of R1, R2, R3, and R4 is not H; polymerizing the reaction mixture; and removing, by distillation, unreacted monomers, the alkyl substituted THF solvent, and any low boiling volatile reaction products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.