Akzo Nobel Chemicals International B.v.

Nouryon Chemicals International B.v.

Akzo Nobel N.v.

Wilhelm Klaas Frijlink

Jan Martijn Van Der Schuur

Auke Gerardus Talma

Andreas Herman Hogt

Paul Albert Iacobucci

Waldo Joseph Elisabeth Beek

Bart Fischer

Johan Nuysink

Michel Van Den Berg

Petrus Paulus Waanders

Leonardus Bernardus Gerhardus Maria Nijhof

Hendrikus Johannes Maria Kamp

Rudy Koers

Process for obtaining polyethylene with an MFI (190&#xb0; C./2.16 kg) of at least 4 g/10 minutes and a melt strength (190&#xb0; C.) of at least 8.0 cN, said process involving extrusion of low density polyethylene (LDPE) with an MFI of at least 5 g/10 minutes and a vinyl content of less than 0.25 terminal vinyl groups per 1000 C-atoms (measured with NMR in deuterated tetrachloroethane solution)&#x2014;in the presence of 500-5,000 ppm, based on the weight of low density polyethylene, of an organic peroxide.

Process for modifying LDPE

A process for enhancing the melt strength of polypropylene by extruding said polypropylene in a twin-screw extruder, under inert atmosphere, at a temperature between about 150&#xb0; C. and about 300&#xb0; C., and in the presence of about 0.1 to about 3.0 wt %, based on the weight of the polypropylene, of a para-substituted dibenzoyl peroxide.

Process for producing high melt strength polypropylene

Process for reducing fogging from high melt strength polypropylene (HMS-PP) obtained by heat treating polypropylene at a temperature between 150&#xb0; C. and 300&#xb0; C. in the presence of a dialkyl peroxydicarbonate, said process involving the introduction of an anhydride to said high melt strength polypropylene.

Process for reducing fogging from high melt strength polypropylene

Masterbatch comprising a dimeric and/or trimeric cyclic ketone peroxide dispersed in a polymeric matrix with a porosity, expressed as percentage of voids on the volume of the matrix, of 0.1-80 vol %, wherein said masterbatch comprises, per 100 g of polymeric matrix, 1-30 g dimeric and/or trimeric cyclic ketone peroxide and less than 0.20 g saturated hydrocarbons with 17-51 carbon atoms.

Masterbatch comprising a cyclic ketone peroxide

Process for enhancing the melt strength of polypropylene by heat treating said polypropylene at a temperature between 150&#xb0; C. and 300&#xb0; C. in the presence of 0.3-3 wt %, based on the weight of the polypropylene, of a dialkyl peroxydicarbonate having alkyl groups with 12-20 carbon atoms, wherein a hydrophilic silica with a silanol group concentration of at least 1.0 mmol Si&#x2014;OH groups/g, as measured by LiAlHtitration, is added to said polypropylene before, during, or after said heat treatment, in a mole ratio Si&#x2014;OH/dialkyl peroxydicarbonate of more than 0.5.

Process for enhancing the melt strength of polypropylene

Masterbatch comprising one or more organic peroxides in liquid form, dispersed in a polymeric matrix comprising at least 50 wt % of a bioresin, wherein the polymeric matrix has a porosity, expressed as percentage of voids on the volume of the matrix, of 2.5-70 vol % and the concentration of water in the masterbatch is kept to 2000 ppm or less, based on the total weight of the masterbatch.

Peroxide masterbatch based on bioresin

Process for thermally stabilizing a polymer containing residues of a Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), or Ge(II)-containing catalyst by treating the polymer at a temperature above its melting temperature with a peroxide selected from the group consisting of ketone peroxides, hydroperoxides, peracids, hydrogen peroxide, and mixtures thereof, wherein said peroxide is used in an amount less than 0.2 wt % based on the weight of the polymer and wherein the molar ratio of peroxy functionalities from said peroxide (p) to metal (M) ranges from 1 to 100; said metal (M) being selected from the group consisting of Sn(II), Sb(III), Pb(II), Bi(III), Fe(II), Ti(II), Ti(III), Mn(II), Mn(III), and Ge(II). The invention further relates to a method for determining the metal residue content of a polymer.

Process for treating polymers containing residual catalyst

Process for the modification of a polymer or copolymer having the following general structure for one or more of the repeating units: (1) wherein n is an integer, m is an integer in the range 0 to 6, and R is selected from hydrogen, substituted or unsubstituted C-Calkyl, C-Ccycloalkyl, C-Caryl, C-Caralkyl, and C-Calkaryl, which groups may include linear or branched alkyl moieties; the optional one or more substituents being selected from the group consisting of hydroxy, alkoxy, linear or branched alk(en)yl, aryloxy, halogen, carboxylic acid, ester, carboxy, nitrile, and amido groups, which process involves contacting the polymer or copolymer with a cyclic organic peroxide under conditions whereby at least some of said peroxide is decomposed. This process results in a (co)polymer with a high degree of branching but free of gel formation. 

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Zwolle, Netherlands

Wilhelm Klaas Frijlink