METHOD OF MANUFACTURING A MEMBRANE USEFUL AS WATERPROOF COVERING FOR ROOFS,LINERS FOR POUNDS AND PITS AND THE LIKE

摘要

pA waterproof membrane comprising an elastomeric sheet, said sheet formed of a composition which includes a neutralized acid group containing elastomeric polymer, the neutralized acid group cation selected from the group consisting of ammonium, antimony, aluminum, iron, lead and a metal of Group IA, IIA, IB or IIB of the Periodic Table of Elements and mixtures thereof; a non-polar process oil; carbon black and a preferential plasticizer is disclosed. In a preferred embodiment the membrane is supported with a supporting sheet, said sheet selected from the group consisting of fabrics, paper and metal foil. The use of this membrane as a roof covering, pond, pit or aqueduct liner is recited. The method of forming the membrane, and the resultant roof covering, pond, pit or aqueduct liner is also disclosed./p[US4589804A]