Laminated glass interlayer

Claim 1

A LAMINATED SAFETY GLASS COMPRISING TWO SHEETS OF GLASS AND A POLYVINYL ACETAL RESIN INTERLAYER, SAID INTERLAYER BEING MODIFIED WITH A PLASTICIZER AND FROM 0.5 TO 5 PARTS PER 100 PARTS OF POLYVINYL ACETAL RESIN OF AN ARYL SUFONAMIDEFORMALDEHYDE-ALCOHOL CONDENSATION PRODUCT, THE POLYVINYL ACETAL RESIN HAVING BEEN PREPARED BY REACTING AN ALDEHYDE HAVING THE FORMULA RCHO WHEREIN R IS TAKEN FROM THE GROUP CONSISTING OF HYDROGEN AND ALKYL AND PHENYL RADICALS WITH A COMPOUND TAKEN FROM THE GROUP CONSISTING OF COMPLETELY HYDROLYZED POLYVINYL ESTERS AND PARTIALLY HYDROLYZED POLYVINY! ESTERS, SAID POLYVINYL ACETAL RESIN BEING MADE UP, ON A WEIGHT BASIS, OF 5-25% HYDROXYL GROUPS CALCULATED AS POLYVINYL ALCOHOL, 0-40% ESTER GROUPS CALCULATED AS POLYVINYL ACETATE AND THE BALANCE SUBSTANTIALLY ACETAL, SAID ARYL SUFONAMIDE CONDENSATION PRODUCT BEING THE CONDENSATION PRODUCT OF A COMPOUND TAKEN FROM THE GROUP CONSISTING OF BENZENE AND TOLUENE SUFONAMIDES WITH FORMALDEHYDE AND AN UNSUBSTITUTED ALIPHATIC SATURATED ALCOHOL CONTAINING FROM 1 TO 8 CARBON ATOMS.