Abstract: A partially cross-linked polymer composition obtainable by dynamically heat-treating: 95 to 50% by weight of a resin (A) comprising a defined ethylene copolymer, and 5 to 50% by weight of a resin (B) comprising a two or more-component propylene copolymer containing 0.1 to 20% by mol of units derived from ?-olefins other than propylene, or a blend of the two or more-component propylene copolymer and a propylene homopolymer which can be in the presence of defined amount of an organic peroxide (C) based on 100 parts by weight of the total amount of the resins (A) and (B). A process for producing the polymer compositions is also provided.

Abstract: A partially cross-linked polymer composition obtainable by dynamically heat-treating: 95 to 50% by weight of a resin (A) comprising an ethylene copolymer containing 5 to 48% by weight of units derived from at least one monomer selected from vinyl acetate, (meth)acrylic acid, (meth)acrylate ester, glycidyl (meth)acrylate and carbon monoxide, and 5 to 50% by weight of a resin (B) having a melt viscosity (JAI 7-1991) at 180° C. of over 10,000 mPa·Es and comprising a two or more-component propylene copolymer containing 0.1 to 20% by mol of units derived from ?-olefins other than propylene, or a blend of the two or more-component propylene copolymer and a propylene homopolymer in the presence of an organic peroxide (C) in an amount of from 0.001 to 4 parts by weight based on 100 parts by weight of the total amount of the resins (A) and (B). A process for producing the polymer compositions is also provided.

Abstract: A curable thermoplastic elastomeric composition comprising: (a) polytrimethylene ether ester elastomer; (b) crosslinkable poly(meth)acrylate rubber; and (c) a crosslinking system to crosslink the rubber. A melt processible thermoplastic elastomeric composition comprising: (a) a continuous phase comprising polytrimethylene ether ester elastomer; and (b) crosslinked poly(meth)acrylate rubber disperse phase.

Abstract: A curable thermoplastic elastomeric blend comprising: (a) from 15 to 60 weight percent of a polyalkylene phthalate polyester polymer or copolymer and; (b) from 40 to 85 weight percent of a poly(meth)acrylate or polyethylene/alkyl (meth)acrylate rubber in combination with an effective amount of peroxide free-radical initiator and an organic multiolefinic coagent to cross-link which upon extrusion or injection molding dynamically cross-link producing a melt processible thermoplastic elastomeric composition having a polyalkylene phthalate polyester polymer or copolymer continuous phase and of a cross-linked polyacrylate or polyethylene/acrylate rubber dispersed phase. Such compositions are useful in the manufacture of rubber parts having excellent resistance to lubricating oils and greases.