Patent ID: 7235261

Claim:
A controlled release dry powder comprising: A) from 1 to 20% by weight, based on 100% by weight of the dry powder, of a poly vinyl alcohol, wherein the poly vinyl alcohol is over 98% hydrolyzed and has a molecular weight of about 5,000 to 100,000; B) from 0.025 to 2% by weight, based on 100% by weight of the dry powder, of a hydrophobic silica; C) from 20 to 70% by weight, based on 100% by weight of the dry powder, of a modified corn starch; and D) from 30 to 50% by weight, based on 100% by weight of the dry powder, of at least one fragrance oil which is emulsified in water and spray dried to evaporate said water obtaining said dry powder.