Methods of preparing polyolefin-based materials having improved adhesive/coating compatibility

A method of preparing molded polyolefin-based materials with improved adhesive/coating compatibility, said method comprising:

• (a) providing a polyolefin-based material to be molded, said material comprising one or more polyolefins;
• (b) combining the polyolefin-based material with from 0.01 to 20% by weight of a saturated fatty acid amide, based upon a total weight of the one or more polyolefins, and a transition metal compound in an amount of from 0.01 to 1000 ppm metal based on the one or more polyolefins;
• and
• (c) subjecting the combined polyolefin-based material, saturated fatty acid amide and transition metal compound to a molding procedure;
• wherein the saturated fatty acid amide corresponds to general formula (I):
• wherein R1 represents a saturated alkyl group having from 5 to 21 carbon atoms;
• wherein R2 and R3 each independently represents hydrogen or an alkyl group having from 1 to 18 carbon atoms, the alkyl group having up to six substituents selected from the group consisting of OH groups, NH2 groups, and C1-10 alkyl groups, and wherein up to three non-adjacent carbon atoms in the alkyl group have been substituted with oxygen ether linkages;
• with the proviso that not both of R2 and R3 are hydrogen;
• and wherein the combined polyolefin-based material, saturated fatty acid amide and transition metal compound contain unsaturated fatty acid amides in an amount not greater than 40% by weight based on the saturated fatty acid amide.

A method of preparing molded polyolefin-based materials with improved adhesive/coating compatibility, said method comprising:

• (a) providing a polyolefin-based material to be molded, said material comprising one or more polyethylenes, from 0.01 to 20% by weight of a saturated fatty acid amide, based upon a total weight of the one or more polyethylenes, and a transition metal salt in an amount of from 0.01 to 5 ppm metal based on the one or more polyolefins, wherein the transition metal salt comprises a metal selected from the group consisting of Co, Zr, Fe, Pb, Mn, Ni, Cr, V, Ce, Ti and Sn;
• and
• (b) subjecting the polyolefin-based material to a molding procedure;
• wherein the saturated fatty acid amide corresponds to general formula (I):
• wherein R1 represents a saturated alkyl group having from 11 to 13 carbon atoms;
• wherein R2 and R3 each independently represents hydrogen or an alkyl group having from 1 to 6 carbon atoms, the alkyl group having up to six substituents selected from the group consisting of OH groups, NH2 groups, and C1-10 alkyl groups, and wherein up to three non-adjacent carbon atoms in the alkyl group have been substituted with oxygen ether linkages;
• with the proviso that not both of R2 and R3 are hydrogen, and at least one of R2 and R3 represents an alkyl group having from 1 to 6 carbon atoms with at least one OH group substituent;
• and wherein the polyolefin-based material contains unsaturated fatty acid amides in an amount not greater than 10% by weight based on the saturated fatty acid amide.