US 4642258 A abstract a reusable permeable dispenser for dispensing solid or semi solid fabric conditioning agent which can be attached to a machine dryer drum or tumbles loosely in the dryer comprising a flexible permeable container comprising a composition of a quarternary ammonium anti static agent a polyalkylene oxide compound and silicone dioxide which has a substantially constant release rate regardless of dryer operator temperature application_number US 51094383 A description the fabric treating agents used in the products of the invention are softening agents or anti static agents which make fabrics feel soft to the touch and reduce the incidence of static electricity a preferred fabric softening agent comprises quaternary ammonium compounds having the general formula str1 wherein r 2 and r 3 are independently hydrocarbyl groups having 1 to 24 carbon atoms which can be saturated or unsaturated linear or branched or which may contain substituent groups such as hydroxyl halo nitro etc preferably r 2 is independently c 1 4 alkyl and r 3 are independently c 5 c 24 alkyl x is an anion and m the valency of x is an integer that ranges from 1 to 4 suitable x m anions include cl br i hso 4 so 4 2 h 2 po 4 hpo 4 2 ch 3 coo 2 hco 2 etc preferred anions are chloride methyl sulfate and acetate typical commercial products of.