The present invention relates to a method for producing polyether carbonates containing alkoxysilyl groups in which (a) an unsaturated polyether carbonate polyol is reacted with (b) an alkoxysilane compound of formula (II) Si(X).sub.m(R1).sub.n(R2).sub.o (II), where XH, YSH and Y=C1-C22 alkylene, C6-C14 arylene, C7-C14 aralkylene, C7-C14 alkylarylene; R1=C1-C8 alkoxy, C7-C20-aralkoxy, C6-C14 aroxy, C7-C20 alkylaroxy; R2=C1-C22 alkyl, C6-C14 aryl, C7-C14 aralkyl, C7-C14 alkylaryl, and m and n represent, independently of one another, an integer 1, o is zero or an integer 1 and m+n+o=4. The invention further relates to the production of a polyurethane polymer using such a polyether carbonate, a cross-linked, siloxane group containing polymer and a molded part containing or consisting of said cross-linked polymer.

A method of curing a free-radically polymerizable composition includes contacting a curable composition with at least one metal oxide selected from the group consisting of magnesium oxide, ferrous metal oxides, aluminum oxide, nickel oxide, silver oxide, and combinations thereof. The curable composition includes: free-radically polymerizable compound; and a beta-dicarbonyl compound represented by the formula (I) or a salt thereof, wherein: X.sup.1 and X.sup.2 independently represent a covalent bond, wherein each R.sup.4 independently represents H or alkyl having from 1 to 18 carbon atoms; R.sup.1 and R.sup.2 independently represent a hydrocarbyl or substituted-hydrocarbyl group having from 1 to 18 carbon atoms, and R.sup.3 represents hydrogen, or a hydrocarbyl or substituted-hydrocarbyl group having from 1 to 18 carbon atoms, or taken together any two of R.sup.1, R.sup.2, or R.sup.3 form a five-membered or six-membered ring; an organic peroxide; and a quaternary ammonium halide. Articles including the cured compositions are also disclosed. ##STR00001##

A method of curing a free-radically polymerizable composition includes contacting a curable composition with at least one metal oxide selected from the group consisting of magnesium oxide, ferrous metal oxides, aluminum oxide, nickel oxide, silver oxide, and combinations thereof. The curable composition includes: free-radically polymerizable compound; and a beta-dicarbonyl compound represented by the formula (I) or a salt thereof, wherein: X.sup.1 and X.sup.2 independently represent a covalent bond, wherein each R.sup.4 independently represents H or alkyl having from 1 to 18 carbon atoms; R.sup.1 and R.sup.2 independently represent a hydrocarbyl or substituted-hydrocarbyl group having from 1 to 18 carbon atoms, and R.sup.3 represents hydrogen, or a hydrocarbyl or substituted-hydrocarbyl group having from 1 to 18 carbon atoms, or taken together any two of R.sup.1, R.sup.2, or R.sup.3 form a five-membered or six-membered ring; an organic peroxide; and a quaternary ammonium halide. Articles including the cured compositions are also disclosed. ##STR00001##

A method of preparing a silane-functionalized polymer, the method comprising: preparing a polymerization system including a cis-1,4-polydiene by introducing a lanthanide-based catalyst and a conjugated diene monomer; and adding a hydrosilane compound to the polymerization system including a cis-1,4-polydiene.

A method of preparing a silane-functionalized polymer, the method comprising: preparing a polymerization system including a cis-1,4-polydiene by introducing a lanthanide-based catalyst and a conjugated diene monomer; and adding a hydrosilane compound to the polymerization system including a cis-1,4-polydiene.

A process may include contacting ethylene monomer with Ziegler-Natta catalyst to form polyethylene. The Ziegler-Natta catalyst may be formed by contacting an alkyl magnesium compound with an alcohol and a metal reagent to form a blend, and contacting the blend with a first agent to form a solution of reaction product A. The solution of reaction product A may be contacted with a second agent to form a solid reaction product B, and the solid reaction product B may be contacted with a third agent to form a solid reaction product C. The solid reaction product C may be contacted with a fourth agent to form a solid reaction product D, and the solid reaction product D may be contacted with a fifth agent to form a catalyst component.

Olefin polymerization catalyst systems and methods for making and using the same are provided.

Olefin polymerization catalyst systems and methods for making and using the same are provided.

The present disclosure relates to a single-pot process for the preparation of a shape controlled pro-catalyst. The process comprises the steps of i. reacting at least one alkanol with magnesium metal using at least one modifier and optionally, at least one solvent resulting in evolution of hydrogen gas, increasing the evolution of the hydrogen gas in a controlled manner by increasing the temperature in a graded manner to 100 C. to obtain a mass, and ii. subjecting the mass to drying to obtain a free flowing procatalyst.

A process for the preparation of a copolymer of propylene and ethylene comprising polymerizing propylene and ethylene in the gas phase in the presence of a solid particulate catalyst free from an external carrier comprising: (i) a symmetrical complex of formula (I), wherein M is zirconium or hafnium; each X is a sigma ligand; L is a divalent bridge selected from R.sub.2C, R.sub.2CCR.sub.2, R.sub.2Si, R.sub.2SiSiR.sub.2, R.sub.2Ge, wherein each R is independently a hydrogen atom, C.sub.1-C.sub.20-alkyl, tri(C.sub.1-C.sub.20-alkyl)silyl, C.sub.6-C.sub.20-aryl, C.sub.7-C.sub.20-arylalkyl or C.sub.7-C.sub.20-alkylaryl; R.sup.2 is a C.sub.1-C.sub.20 hydrocarbyl radical; m is 2 to 5; R.sup.9 is a H or C.sub.1-C.sub.20 hydrocarbyl radical; R.sup.7 is a hydrogen atom or a C.sub.1-10 hydrocarbyl radical; n is 0 to 3; R.sup.1 is a C.sub.1-C.sub.20 hydrocarbyl radical and optionally two adjacent R.sup.1 groups taken together can form a further mono or multicyclic ring condensed to Ph ring optionally substituted by one or two groups R.sup.4; and R.sup.4 is a C.sub.1-C.sub.10 alkyl radical; and (ii) a cocatalyst, preferably comprising an organometallic compound of a Group 13 metal; wherein the xylene soluble fraction of the propylene ethylene copolymer has an ethylene content of at least 10 wt % and an intrinsic viscosity of at least 1.2 dl/g. ##STR00001##