Extruded fragrance-containing polyvinyl alcohol and use thereof

摘要

Described is a composition of matter particularly useful in fabricating toilet rim blocks consisting of: (a) extruded polyvinyl alcohol or partially hydrolyzed polyvinyl acetate with the maximum mole ratio of acetyl moiety:hydroxyl moiety being about 3:1 having a number average molecular weight of from about 15,000 up to about 68,000 containing from 0 up to about 13% by weight of an added polar plasticizer; (b) from about 1 up to about 20% by weight of a compatible fragrance contained within the polyvinyl alcohol or partially hydrolyzed polyvinyl acetate; (c) from 0 up to about 20% by weight of a "foaming agent" which is a first surfactant and which can be a detergent, contained within the polyvinyl alcohol or partially hydrolyzed polyvinyl acetate; (d) from 0 up to about 20% by weight of a hydrophobic silica contained within the polyvinyl alcohol or partially hydrolyzed polyvinyl acetate; (e) from 0 up to about 20% by weight of at least one second surfactant in addition to the "foaming agent"; (f) from 0 up to about 5% by weight of a water-soluble dye; and (g) from 0 up to about 4% by weight of a "foam booster". Also described are processes for preparing such compositions of matter and such toilet rim blocks. When used for the fabrication of toilet rim blocks, the maximum mole ratio of acetyl moiety:hydroxyl moiety is about 1:3.