Halogenated polyether polyols and polyurethane foams...

Details Halogenated polyether polyols and polyurethane foams... Halogenated polyether polyols and polyurethane foams...

C - Chemistry, Metallurgy

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C08G 18/50 (2006.01) C08G 59/14 (2006.01) C08G 65/22 (2006.01) C08G 65/24 (2006.01) C08G 65/26 (2006.01) C08G 65/324 (2006.01) C08G 65/327 (2006.01) C08G 65/335 (2006.01)

Patent

CA 1051599

METHOD OF PRODUCING HIGH YIELD CHEMIMECHANICAL PULPS Abstract of the Disclosure An improved process for producing high yield chemi- mechanical pulps from wood or other lignocellulosic materials, such as chips, whereby the material is first sulfonated to at least about 85% of the maximum level of sulfonation, as defined, for such material without reducing the pulp yield to below 90% and subjecting the resulting sulfonated wood to mechanical defibration.

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