Polyvinyl alcohol powder

Details Polyvinyl alcohol powder Polyvinyl alcohol powder

C - Chemistry, Metallurgy

08

F

C08F 16/06 (2006.01) C08F 8/12 (2006.01) C08J 3/03 (2006.01) C08J 3/12 (2006.01) C08J 9/28 (2006.01)

Patent

CA 2205889

The present invention provides a polyvinyl alcohol powder which comprises a pore having an average diameter of 0.1 to 10 µm in the range of 0.05 to 0.4 cc/g. Since the PVA powder of the present invention has an excellent solubility in water, an aqueous solution thereof can easily be prepared industrially. Since the PVA powder of the present invention has a low content of an organic volatile component and a low content of a nonvolatile component such as a carboxylic acid salt or the like which is derived from a basic catalyst, it has an excellent industrial handleability.

L'invention porte sur une poudre de poly(alcool vinylique) avec un pore possédant un diamètre moyen de 0,1 à 10 microns dans une plage de 0,05 à 0,4 cc/g. Étant donné que la poudre de PVA de l'invention a une excellente hydrosolubilité, il est très facile d'en préparer une solution aqueuse à l'échelle industrielle. De plus, comme la même poudre a une faible teneur en constituants organiques volatils et non volatils, comme les sels d'acide carboxylique ou composés de même type, dérivés d'un catalyseur basique, elle offre une excellente usinabilité à l'échelle industrielle.

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