SOFT AND FLEXIBLE FOAMS

摘要

A soft foam having an Asker C hardness of less than about 65, comprising;(A) from about 30 to about 70 percent by weight (based on the combined weight of Components A and B) of one or more alkenyl aromatic polymers and wherein at least one of said alkenyl aromatic polymers has a molecular weight (Mw) of from about 100,000 to about 500,000; and(B) from about 30 to about 70 percent by weight (based on the combined weight of Components A and B) of one or more substantially random interpolymers having an I2 of about 0.1 to about 50 g/10 min, an Mw/Mn of about 1.5 to about 20; comprising(1) from about 8 to about 45 mol % of polymer units derived from;(a) at least one vinyl or vinylidene aromatic monomer, or(b) at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, or(c) a combination of at least one aromatic vinyl or vinylidene monomer and at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, and(2) from about 55 to about 92 mol % of polymer units derived from at least one of ethylene and/or a C3-20 alpha-olefin; and(3) from 0 to about 20 mol % of polymer units derived from one or more of ethylenically unsaturated polymerizable monomers other than those derived from (1) and (2); and(C) optionally, one or more nucleating agents; and(D) optionally, one or more other additives; and(E) one or more blowing agents present in a total amount of from about 0.4 to about 5.0 gram-moles per kilogram (based on the combined weight of Components A and B).