Crosslinked elastic material formed from a linear block copolymer
US8349963B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2007 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Nov 2, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/602
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An elastic material for use in an absorbent article is provided. The elastic material contains a crosslinked network formed from a linear block copolymer having a monoalkenyl aromatic midblock positioned between conjugated diene endblocks (e.g., butadiene-styrene-butadiene (“B-S-B”) triblock copolymer). Prior to crosslinking, such linear block copolymers have a relatively low viscosity and thus may be readily formed into a precursor elastic material (e.g., film, strands, web, etc.) that is subsequently crosslinked to achieve the desired elastic and mechanical properties. Crosslinking is typically achieved through the formation of free radicals (unpaired electrons) that link together to form a plurality of carbon-carbon covalent bonds at the conjugated diene endblocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.