Patent ID: 6552148
Filing Date: 2003-04-22
Classification: C08F

Abstract:
A pseudorandom interpolymer product comprising an &agr;-olefin interpolymerized with at least one vinyl or vinylidene aromatic monomer or hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, wherein the product comprises(1) from 27 to 46 mol percent of polymer units derived from (i) the vinyl or vinylidene aromatic monomer represented by the following formula: â€ƒwherein R1 is selected from the group of radicals consisting of hydrogen and alkyl radicals containing from about 1 to about 4 carbon atoms; each R2 is independently selected from the group of radicals consisting of hydrogen and alkyl radicals containing from about 1 to about 4 carbon atoms; Ar is a phenyl group or a phenyl group substituted with from about 1 to about 5 substituents selected from the group consisting of halo, C1-4-alkyl, and C1-4 haloalkyl; and n has a value from zero to about 4; or (ii) the hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer is represented by the following general formula; â€ƒwherein A1 is a sterically bulky aliphatic or cycloaliphatic substituent of up to 20 carbons, R1 is selected from the group of radicals consisting of hydrogen and alkyl radicals containing from 1 to 4 carbon atoms; each R2 is independently selected from the group of radicals consisting of hydrogen and alkyl radicals containing from 1 to 4 carbon atoms; or alternatively R1 and A1 together form a ring system; and (2) from 54 to 73 mol percent of polymer units derived from the &agr;-olefin which comprises ethylene, or ethylene and at least one of propylene, 4-methyl-1-pentene, butene-1, hexene-1 and octene-1, â€ƒwherein the interpolymer product is characterized as having: A) a melting point, as determined using differential scanning calorimetry, equal to or greater than the product of the equation: melting point=128âˆ’1.3333Ã—total weight percent interpolymerized vinyl and/or vinylidene aromatic monomer, or B) a glass transition temperature range or width at half peak temperature height of greater than or equal to 15Â° C., as determined using dynamic mechanical spectroscopy (DMS) loss modulus (Gâ€³) data.