Akzo Nobel N.v.

Akzo N.v.

Himont Incorporated

Andreas Herman Hogt

John Meijer

Anna Gerdine Van De Bovenkamp-Bouwman

Joachim Willem J Van Gendt

Auke Gerardus Talma

Bart Fischer

Jernej Jelenic

Rudolf F De Block

Andreas Petrus Van Swieten

Rabindra Nath Datta

Wilhelm Klaas Frijlink

Peter Hope

Gerrit Bekendam

Anthony J DeNicola, Jr

Reinder Torenbeek

Hans Westmijze

Boen Ho O

Geesje Klasina Spijkerman

Johannes P Verlaan

Ejaz Ahmed Syed

Bernhard De Vries

Haimo Tonnaer

Leonie Arina Stigter

Rene Gerritsen

Caroline C Wei-Berk

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. 

Process for the modification of biodegradable polymers

The invention relates to peroxides derivable from The invention further relates to the process to make these peroxides as well as to their use in polymerization, curing, and modification reactions.

Ketone peroxide derivatives, their preparation and use

The invention relates to a preparation process for making peroxy esters and peroxy carbonates, peroxy ester peroxy carbonates, mixed diperoxides, mixed diperoxy esters, and mixed diperoxy carbonates, and to specific monoperoxy esters, monoperoxy carbonates, mixed peroxides, mixed diperoxy esters, mixed diperoxy carbonates, peroxy ester peroxy carbonates, and mixtures thereof. The process involves the reaction of a type-3 ketone peroxide with a reactive carbonyl compound and optional subsequent reaction with an alkyl vinyl ether, acetal, halogen formate, or carboxylic acid anhydride.

Peroxides, their preparation process and use

Use of trioxepans in the process to make high-solid acrylic, styrenic, and LDPE-type resins

Trioxepan compounds

The invention is drawn to compounds of formula (I) which is HOO&mdash;C(R1)(R2)&mdash;OO&mdash;(R1)(R2)&mdash;OO&mdash;(C&boxH;O)&mdash;(O) R3 wherein n is 0 or 1, R1 and R2 are independently selected from the group consisting of H, C -C alkyl, C -C cycloalkyl, C -C aryl, C -C aralkyl, C -C alkaryl which may be optionally substituted or R1 and R2 can form a C -C cycloalkyl group and R3 is selected from C -C alkyl, C -C cycloalkyl, C -C aryl, C -C aralkyl, and C -C alkaryl which can be optionally substituted; a process for the preparation of the peroxy esters or peroxy carbonates of formula (I); and the method of using the compounds as polymer initiators or curing agents.

Extrusion process for enhancing the melt strength of polypropylene

The invention pertains to a process for enhancing the melt strength of a polypropylene (co)polymer with the aid of initiator dispersions. The use of initiator dispersions with a particulate initiator instead of the corresponding non-dispersed initiators or their dilutions or solutions results in a significant enhancement of the melt strength of the modified polymer, and a wide range of initiators turn out to be serviceable.

Process for enhancing the melt strength of polypropylene (co)polymers

Modification of (co) polymers with cyclic ketone peroxides

Cyclic ketone peroxide formulations

A rubber composition which is the vulcanization reaction product of a rubber, sulfur or a sulfur donor and particular anti-reversion coagents, is disclosed. The anti-reversion coagents only partially react under sulfur-vulcanization reaction conditions up to optimum cure, and, after optimum cure, form cross-links bonded to the sulfur cross-linked rubbers by carbon-carbon linkages. Also disclosed are a vulcanization process carried out in the presence of the anti-reversion coagents and the use of these anti-reversion coagents in the sulfur-vulcanization of rubbers. The anti-reversion coagents of the disclosure provide sulfur-vulcanized rubbers having significantly improved physical properties.

Anti-reversion coagents for rubber vulcanization

A process for the modification of a (co)polymer selected from C.sub.3 -C.sub.10 .alpha.-olefin polymers, ethylene polymers, diene polymers and copolymers of C.sub.3 -C.sub.10 .alpha.-olefins with ethylene and/or diene, to make the (co)polymer more suitable for reinforcement with polymer reinforcing material is disclosed. In the process, the (co)polymer is contacted with an acid group-containing unsaturated peroxide to modify the (co)polymer. The modification process results in improved properties such as adhesion to PUR lacquer and improved mechanical properties. Also disclosed are a modification process carried out in the presence of an unsaturated coagent as well as the use of acid group-containing unsaturated peroxides for the modification of (co)polymers. Finally, the process may be carried out in a single processing step or in two or more successive processing steps.

Modification of (CO)polymers with unsaturated peroxyacids

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Enschede, Netherlands

Andreas Herman Hogt