| abstract |
The present invention provides a composition comprising one or more than onenisotactic, modified polypropylene (MPP) or polypropylene-α-olefin copolymer (MPPncopolymer) and one or more than one polymer or resin, wherein said MPP or MPP copolymernis modified with one or more than one carboxyl or anhydride, preferably maleic acid ornanhydride, or with one or more than one epoxy or hydroxyl group. Alternatively, the presentninvention provides a composition comprising an adduct which is the reaction product of onenor more than one isotactic, modified polypropylene (MPP) or isotactic, modifiednpolypropylene-α-olefin copolymer (MPP copolymer) with one or more than one carboxyl,nanhydride, epoxy or hydroxyl functional reactant, polymer or resin. The composition may benused to make aqueous or solvent borne compositions for making primers, coatings, powderncoatings, films, laminates, moldings and shaped-articles having good adhesion tonthermoplastic polyolefins (TPO) or polyolefin, while partly or wholly avoiding use ofnenvironmentally harmful chlorinated polyolefin (CPO) additives. The isotactic MPP or MPPncopolymer preferably has one or two terminal carboxyl, anhydride, epoxy or hydroxyl group.nMore preferably, the isotactic MPP or MPP copolymer has a low molecular weight and anmelting point of from 70 to 145°C, preferably 80 to 105°C for MPP copolymer andnpreferably 105 to 120°C for an MPP homopolymer, and provides excellent penetration intonTPO or polyolefin substrates. |