Nonextruded concentrates of additives, fillers or pigments

Details Nonextruded concentrates of additives, fillers or pigments Nonextruded concentrates of additives, fillers or pigments

C - Chemistry, Metallurgy

08

K

C08K 9/00 (2006.01) C08J 3/22 (2006.01) C08J 9/40 (2006.01) C09C 3/10 (2006.01)

Patent

CA 2042466

Disclosed is a concentrate of at least one additive, pigment or filler, or combinations thereof, to be used in the processing of polymers or copolymers of olefins, said concentrate being in the form of nonextruded particles, each particle comprising A) a matrix consisting of a spherical nonextruded particle of an olefin polymer or copolymer having a porosity, higher than 18%, expressed in percentage of voids on the volume of the particle, measured by mercury porosimetry at a pressure of up to 0.25 MPa (2.5 kg/cm2), and B) in an amount of from 5% to 50% by weight based on the total weight of the concentrate of at least one additive, pigment or filler, or combinations thereof, deposited on the surface of the matrix (A) and/or inside its pores.

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