Polyalkylene glycol-grafted polycarboxylate suspension and dispersing agent for cutting fluids and slurries
US9217118B2 · kind B2 · utility
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Key dates
| Filing date | Oct 16, 2009 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Aug 23, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Cutting fluids for brittle materials, e.g., silicon ingot, comprise, in weight percent: A. 70-99% polyalkylene glycol (PAG), e.g., polyethylene glycol; B. 0.01-10% PAG-grafted polycarboxylate; and C. 0-30% water. These cutting fluids are used with abrasive materials, e.g., silicon carbide (SiC), to form cutting slurries. The slurry is sprayed on the cutting tool, e.g., a wire saw, to cut a brittle work piece, e.g., a silicon ingot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.