Sulfonated block copolymers having acrylic esterand methacrylic ester interior blocks, and various uses for such blocks, and various uses for such block copolymers
US7981970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2010 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Apr 20, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/678
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A sulfonated block copolymer which is solid and non-dispersible in water having at least two polymer end blocks A and at least one interior block B wherein each A block is a polymer block resistant to sulfonation and each B block is a polymer block susceptible to sulfonation, wherein the A and B blocks do not contain any significant levels of olefinic unsaturation. Each A block having one or more segments selected from (i) acrylic esters, (ii) methacrylic esters, and (viii) mixtures thereof; and each B block comprising segments of one or more polymerized vinyl aromatic monomers selected from (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.