Borealis Ag

Exxon Chemical Patents, Inc.

Marc Knaepen

Anh Tuan Tran

Johan Defoer

Tuan Anh Tran

The present invention relates to a propylene copolymer composition comprising (A) from 50.0 to 95.0 wt %, based on the total amount of the propylene copolymer composition, of a heterophasic propylene copolymer having a matrix phase and an elastomeric phase dispersed in said matrix phase, wherein the matrix phase is a propylene random copolymer, the heterophasic propylene copolymer further having a melt flow rate MFR2 of 0.2 to 12.0 g/10 min, determined according to ISO 1133 at a temperature of 230° C. and a load of 2.16 kg, and a xylene cold solubles (XCS) fraction in the range of from 20.0 to 50.0 wt % based on the total amount of the heterophasic propylene copolymer (A), determined according to ISO 16152 at a temperature of 25° C., and (B) from 5.0 to 25.0 wt %, based on the total amount of the propylene copolymer composition, of a propylene based plastomer having a density in the range of from 845 to 870 kg/m, determined according to ASTM D 1505 on compression moulded test specimens and a melt flow rate MFR2 of 1.0 to 30.0 g/10 min, determined according to ASTM D1238 at a temperature of 230° C. and a load of 2.16 kg, wherein the propylene copolymer composition has a tensile modulus of below 300 MPa, determined according to ISO 527-2, measured on injection moulded test specimens, and follows the following inequation: tensile modulus [MPa]<375 MPa−6×amount of (B) [MPa×wt %/wt %], an article comprising said propylene copolymer composition and the use of said propylene copolymer composition in a single ply roofing membrane.

Soft propylene copolymer composition

A propylene copolymer composition is provided, wherein the composition includes from 50.0 to 90.0 wt %, based on the total amount of the propylene copolymer composition, of a heterophasic propylene copolymer having a matrix phase and an elastomeric phase dispersed in said matrix phase, wherein the matrix phase is a propylene random copolymer. The composition also includes from 5.0 to 25.0 wt %, based on the total amount of the propylene copolymer composition, of a propylene based plastomer from 5.0 to 25.0 wt %, based on the total amount of the propylene copolymer composition, of an ethylene based plastomer. An article comprising said propylene copolymer composition and the use of said propylene copolymer composition in a single ply roofing membrane is also provided.

A process for increasing MFRof a polyethylene copolymer or an ethylene plastomer or elastomer comprising: (I) extruding a copolymer of polyethylene copolymer having a density of 910 to 970 kg/mand an MFRof 1 and 100 g/10 min or an ethylene plastomer or elastomer having a density of 855 to 910 kg/mand an MFRof 0.5 and 100 g/10 min in the presence of 0.1 to 2 wt % of a non-peroxide radical initiator so as to produce a polyethylene copolymer having an MFRof 200 g/10 min or more, or an ethylene plastomer or elastomer having a MFRof 200 g/10 min or more.

Visbreaking process

In a one step process a body of woodchips or lignocellulosic fibres impregnated with a heat curable polar resin adhesive is contacted with EP(D)M rubber sheet containing peroxide curative and subjected to hot pressing. The rubber is thereby cured and caused to convulcanize and adhere to the woodchips to produce a weather resistant construction element.

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Landen, Belgium

Marc Knaepen