Method of making a water-soluble polymer composition
US11718010B2 · kind B2 · utility
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5References
13Claims
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Key dates
| Filing date | May 26, 2020 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Jan 31, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/262
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of creating a processable water soluble polymer, the method comprising the steps of: extruding a water soluble polymer composition from an extruder barrel without use of a die, wherein the extruder barrel is not vented other than via its extruder outlet, to produce an irregularly shaped polymer extrudate; directing the irregularly shaped polymer extrudate onto a chilled conveyor to cool the irregularly shaped polymer extrudate to below 60° C.; and granulating the irregularly shaped polymer extrudate to form a granulate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.