1. A polymerization process comprising the steps:
a) polymerizing ethylene in the presence of a first Ziegler-Natta catalyst comprising titanium, magnesium, and aluminum at a temperature from 140\xb0 C. to 250\xb0 C. in the absence of hydrogen to produce a first ethylene polymer component having a first degree of long-chain branching that corresponds to a rheological polydispersity from 2.5 to 10;
b) polymerizing ethylene at a temperature from 140\xb0 C. to 250\xb0 C. under conditions effective to produce second ethylene polymer component having a second degree of long chain-branching that corresponds to a rheological polydispersity from 0.8 to 1.8; and
c) combining the first and second ethylene polymer components to give a polymer blend wherein a third degree of long-chain branching in the blend is controlled by adjusting the relative amounts of the first and second ethylene polymer components.
2. The process of claim 1 wherein steps (a) and (b) are performed in series such that the second ethylene polymer component is produced in the presence of the first ethylene polymer component.
3. The process of claim 2 wherein the first ethylene polymer component is produced in two parallel reactors.
4. The process of claim 1 wherein steps (a) and (b) are performed in parallel reactors.
5. The process of claim 1 wherein the first Ziegler-Natta catalyst is prepared using an alkylmagnesium silylamide.
6. The process of claim 5 wherein the first Ziegler-Natta catalyst comprises the product formed by: (i) contacting the alkylmagnesium silylamide with an alkylaluminum dichloride, and (ii) contacting the product from step (i) with titanium tetrachloride or a mixture of titanium tetrachloride and vanadium oxytrichloride.
7. The process of claim 1 wherein the second ethylene polymer component is prepared in the presence of hydrogen.
8. The process of claim 1 wherein the second ethylene polymer component is prepared in the presence of a second Ziegler-Natta catalyst comprising titanium, vanadium, or both.
9. The process of claim 8 wherein the second Ziegler-Natta catalyst comprises a mixture of titanium tetrachloride and vanadium oxytrichloride.
10. The process of claim 1 wherein the first ethylene polymer component has a phase angle at G*=1\xd7105 dynescm2 of less than 70 degrees.
11. The process of claim 1 wherein the second ethylene polymer component has a phase angle at G*=1\xd7105 dynescm2 of greater than 70 degrees.
12. The process of claim 1 wherein either or both of steps (a) and (b) is performed in the presence of an \u03b1-olefin selected from the group consisting of 1-butene,1-hexene, and 1-octene.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A universal strike plate system for use on a strike jamb, the universal strike plate system comprising:
a face plate comprising
a back surface configured for mounting the strike plate saddle onto the strike jamb;
a strike plate seat for mounting a strike plate to the strike plate seat, wherein strike plate seat is a recessed area of a front face surface of the face plat;
an elongated vertical side forming an open side of the strike plate seat configured to receive a latch or bolt mounted on a door, and
an elongated vertical side forming the closed side of the face plate that is configured to not receive the door latch;
wherein the strike plate seat defines a primary through hole to receive the latch or the bolt, wherein the primary through hole is vertically-centered in said recessed area; and
wherein the strike plate seat further defines at least two secondary through holes to receive fastening members so as to mount said strike plate saddle onto said strike jamb, wherein said secondary through holes are positioned in said face surface with at least one said secondary through hole positioned above said primary through hole and at least one said secondary through hole positioned below said primary through hole.
2. The universal strike plate system of claim 1, wherein the back surface comprises a protruding ridge for horizontally aligning the strike plate saddle against an outside corner of the strike jamb, wherein the protruding ridge is substantially perpendicular to the back surface, and wherein the protruding ridge extends vertically along said open side edge of the back surface.
3. The universal strike plate system of claim 1, wherein the open side comprises a midline mark for vertically aligning the strike plate saddle with the latch or the bolt, wherein the midline mark is vertically centered along the open side, and wherein the midline mark is comprised of an elevated, recessed, or colored mark.
4. The universal strike plate system of claim 1, wherein the back surface comprises a protruding ridge for horizontally aligning the strike plate saddle against an outside corner of the strike jamb, wherein the protruding ridge is perpendicular to the back surface, and wherein the protruding ridge extends vertically along the open side edge of the back surface; and
in which the open side comprises a midline mark for vertically aligning the strike plate saddle with the latch or the bolt, wherein the midline mark is vertically centered along the open side, and wherein the midline mark is comprised of an elevated, recessed, or colored mark.
5. A method of mounting a strike plate onto a strike jamb comprising:
providing a strike plate saddle to be mounted to the strike jamb, the a strike plate saddle comprising a face plate that defines a recessed area for receiving a strike plate, the recessed area defining a primary through hole that is configured to receive a door latch or door bolt and secondary through holes;
aligning the strike plate saddle on the strike jamb so that the latch or the lock bolt of a door aligns with a vertical center of the primary through hole in the strike plate saddle;
affixing the strike plate saddle onto the strike jamb with one or more fasteners through secondary through holes in the strike plate saddle;
aligning the strike plate on the face of the strike plate saddle;
pressing said strike plate against the recessed area of the strike plate saddle;
securing the strike plate to the strike plate saddle and the strike jamb with fasteners inserted through mounting holes in the strike plate that then pass through secondary holes in the strike plate saddle and into the strike jamb.
6. The method according to claim 5 wherein the strike plate saddle is separate from the strike jamb and the strike plate.
7. The method according to claim 5 further comprising pressing the strike plate saddle against the strike jamb so as to temporarily place the strike plate saddle to the strike jamb.
8. The method according to claim 5 further comprising creating or expanding mortise hole in said strike jamb to receive the latch or lock bolt if necessary.
9. The method according to claim 5 further comprising exposing a pre-applied adhesive substance on the back surface of the strike plate saddle.
10. The method according to claim 5 further comprising removing the strike plate.
11. The method according to claim 5 further comprising pressing said strike plate saddle against said strike jamb so as to temporarily mount said strike plate saddle to said strike jamb.
12. The method according to claim 5 further comprising exposing a pre-applied adhesive substance on the face of said strike plate saddle.
13. The method according to claim 5 wherein aligning the strike plate on the face of the strike plate saddle is performed so that the vertical center of said strike plate aligns with the vertical center of said primary through hole in said strike plate saddle.
14. A universal strike plate system for use on a strike jamb, the strike plate comprising:
a face plate comprising:
a back surface configured for mounting the strike plate saddle onto the strike jamb;
a strike plate seat for mounting a strike plate to the strike plate seat, wherein strike plate seat is recessed relative to a front face of the face plate as a recessed area of a front face surface;
an elongated vertical side forming an open side of the strike plate seat configured to receive a latch or bolt mounted on a door,
wherein the strike plate seat defines a primary through hole to receive the latch or the bolt; and
wherein the strike plate seat further defines at least two secondary through holes configured to receive fastening members so as to mount said strike plate saddle onto said strike jamb,
wherein the face plate is a component that is separate from the strike plate and also from the strike jamb.