| abstract |
A microporous material comprising: (a) a water insoluble thermoplastic organic polymer matrix comprising polyolefin; (b) charge formed by finely divided water insoluble particles, said charge being formed by particles distributed through said matrix and constituting 20 to 90 percent by weight, based on the total weight of said microporous material; and (c) a network of interconnected pores that communicate through said microporous material; wherein said microporous material has, - a volatile material contact surface, - a vapor release surface, wherein said volatile material contact surface and said vapor release surface are opposite each other, and where (i ) at least a part of said volatile material contact surface has a first coating thereon, and / or (ii) at least a part of said vapor release surface has a second coating thereon, and the first and The second coatings can each be formed independently from an aqueous coating composition that includes dispersed organic polymeric material. |