This disclosure relates to a continuous solution three reactor polymerization process. Process solvent, ethylene, optional comonomers, optional hydrogen and a single site catalyst system are injected into a first and second reactor configured in parallel to one another. A third reactor receives effluent from the first reactor, the second reactor, or a combination of the first and second reactors. Fresh monomer is feed to the third reactor for further polymerization and to give a final polyethylene product.

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.

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.

A heterophasic propylene ethylene copolymer having an MFR.sub.2 of 0.5 to 100 g/10 m in and obtained using single site catalysis comprising: (i) a propylene homopolymer or propylene ethylene copolymer matrix having up to 4 wt % ethylene; and (ii) an ethylene propylene rubber (EPR) dispersed in the matrix; said heterophasic propylene ethylene copolymer having a xylene cold soluble content (XS) of 20 to 40%; wherein the ethylene content of the xylene cold soluble fraction of said heterophasic propylene ethylene copolymer is between 70 and 90 wt. %; wherein the xylene cold soluble fraction of said heterophasic propylene ethylene copolymer has an intrinsic viscosity (IV) of 3.0 dl/g or more; and wherein the melting enthalpy (?HM) of the heterophasic propylene ethylene copolymer is between 10 and 30 J/g at a temperature of 0 to 130? C.

A heterophasic propylene ethylene copolymer having an MFR.sub.2 of 0.5 to 100 g/10 m in and obtained using single site catalysis comprising: (i) a propylene homopolymer or propylene ethylene copolymer matrix having up to 4 wt % ethylene; and (ii) an ethylene propylene rubber (EPR) dispersed in the matrix; said heterophasic propylene ethylene copolymer having a xylene cold soluble content (XS) of 20 to 40%; wherein the ethylene content of the xylene cold soluble fraction of said heterophasic propylene ethylene copolymer is between 70 and 90 wt. %; wherein the xylene cold soluble fraction of said heterophasic propylene ethylene copolymer has an intrinsic viscosity (IV) of 3.0 dl/g or more; and wherein the melting enthalpy (?HM) of the heterophasic propylene ethylene copolymer is between 10 and 30 J/g at a temperature of 0 to 130? C.

Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following: (1) reacting said metal alkyl compound with an acid to produce a soluble metal ester; or (2) adding an ionic surfactant; or (3) adding a mixture comprising an antioxidant to the product under conditions sufficient to avoid formation of significant amounts of insoluble metal or metal compounds derived from said metal alkyl compound; or (4) purging said post-reactor heat exchanger with an inert gas under conditions to remove metal oxide from the post-reactor heat exchanger.

Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following: (1) reacting said metal alkyl compound with an acid to produce a soluble metal ester; or (2) adding an ionic surfactant; or (3) adding a mixture comprising an antioxidant to the product under conditions sufficient to avoid formation of significant amounts of insoluble metal or metal compounds derived from said metal alkyl compound; or (4) purging said post-reactor heat exchanger with an inert gas under conditions to remove metal oxide from the post-reactor heat exchanger.

A door assembly. The door assembly may include at least one door panel and a door frame having a plurality of frame members including a header and a pair of side jambs. The invention may also be considered a frame member. The frame member may include a core; and a two-piece top piece adjoining the core to form a structural member. The core and the top piece may be a composite of cellulosic material and at least one other material. The door assembly may further include at least one adjacent panel. Also disclosed are door jamb frame members and mullion frame members.

An olefin resin having requirements (I) to (VI) is provided: (I) a grafted olefin polymer containing a main chain with an ethylene/-olefin copolymer and a side chain with a propylene polymer; (II) the ratio P wt % of propylene polymer is from 5 to 60 wt %; (III) when the ratio of the amount of a component(s) having a peak temperature of a differential elution curve as measured by CFC using o-dichlorobenzene of less that 65 C., to the amount of () taken as E wt %, the value a represented by an equation (Eq-1), is 1.4 or more; (IV) the melting point (Tm) is 120 to 165 C. and the glass transition temperature (Tg) is 80 to 30 C., as measured by DSC; (V) the hot xylene-insoluble content is less than 3 wt %; and, (VI) the limiting viscosity as measured in decalin at 135 C. is 0.5 to 5.0 dl/g.

An olefin resin having requirements (I) to (VI) is provided: (I) a grafted olefin polymer containing a main chain with an ethylene/-olefin copolymer and a side chain with a propylene polymer; (II) the ratio P wt % of propylene polymer is from 5 to 60 wt %; (III) when the ratio of the amount of a component(s) having a peak temperature of a differential elution curve as measured by CFC using o-dichlorobenzene of less that 65 C., to the amount of () taken as E wt %, the value a represented by an equation (Eq-1), is 1.4 or more; (IV) the melting point (Tm) is 120 to 165 C. and the glass transition temperature (Tg) is 80 to 30 C., as measured by DSC; (V) the hot xylene-insoluble content is less than 3 wt %; and, (VI) the limiting viscosity as measured in decalin at 135 C. is 0.5 to 5.0 dl/g.