1. A metal compound obtained by a process comprising the step of contacting the following components (a) to (c), wherein the amount of the component (b) contacted is from 0.1 to 8 mol, and the amount of the component (c) contacted is from 0.5 to 8 mol, per 1 mol of the component (a), respectively:
(a) a compound represented by the following formula 1
M1L1r 1
(b) a compound represented by the following formula 2
R1a-1TH 2, and
(c) a compound represented by the following formula 3,
R24-nJ(OH)n 3
wherein M1 is a metal atom of the Groups 12 to 15 in th the periodic table or a boron atom; r is a valence of M1; L1 is a hydrogen atom, a halogen atom, a hydrocarbon group or a hydrocarbon oxy group, and when two or more L1’s exist, they may be the same or different from one another; T is a non-metal atom of the Group 15 or 16 in the periodic table; s is a valence of T; R1 is an electron-withdrawing group or an electron-withdrawing group-containing group, and when two or more R1’s exist, they may be the same or different from one another; n is the number of from 2 to 4; J is a non-metal atom of the Group 14 in the periodic table; and R2 is a hydrocarbon group, and when two or more R2’s exist, they may be the same or different from one another.
2. The metal compound according to claim 1, wherein T is a nitrogen atom or an oxygen atom.
3. The metal compound according to claim 1, wherein R1 is a halogenated hydrocarbon group.
4. The metal compound according to claim 1, wherein the component (b) is a fluorinated phenol.
5. The metal compound according to claim 1, wherein the component (b) is pentafluorophenol.
6. The metal compound according to claim 1, wherein the component (b) is a fluorinated alcohol.
7. The metal compound according to claim 1, wherein the component (b) is 1,1,1,3,3,3-hexafluoro-2-propanol.
8. The metal compound according to claim 1, wherein M1 is a bismuth atom.
9. The metal compound according to claim 1, wherein M1 is an aluminum atom.
10. The metal compound according to claim 1, wherein J is a silicon atom.
11. A catalyst component for addition polymerization comprising the metal compound according to claim 1.
12. A catalyst for addition polymerization obtained by a process comprising the step of contacting a catalyst component for addition polymerization according to claim 11 with a compound (B) of a metal selected from the group consisting of metals of Groups 3 to 11 and lanthanide series, and optionally an organoaluminum compound (C).
13. The catalyst for addition polymerization according to claim 12, wherein the compound (B) is a metallocene compound.
14. The catalyst for addition polymerization according to claim 12, wherein the compound (B) is a transition metal compound, which contains at least one group having a cyclopentadienyl type anion skeleton.
15. A process for producing an addition polymer comprising the step of polymerizing an addition polymerizable monomer in the presence of the catalyst for addition polymerization according to claim 12.
16. The process for producing an addition polymer according to claim 15, wherein the addition polymerizable monomer is an olefin.
17. The process for producing an addition polymer according to claim 15, wherein the addition polymerizable monomer is a combination of ethylene and an -olefin.
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. An electric actuator, comprising
a motor (1) for driving said electric actuator;
a screw cylinder (3) for connecting a shaft of said motor (1) to a connecting part (5) and for surrounding the external surface of said motor (1), said screw cylinder having right-handed and left-handed screw recesses (4) formed thereon and having first and second ball screw nuts (6 and 9), said first ball screw nut (6) having a first electronic brake (8) mounted thereon and said second ball screw nut (9) having a second electronic brake (7) mounted thereon, thereby enabling a non-stop reciprocating linear movement; and
an outside cylinder (2) provided with thrust bearings (1 1) that are in contact with said first and second ball screw nuts (6 and 9) and provided with a sensor (13) that are disposed on the surface of a fixed part (16) thereof for measuring the movement distance of said screw cylinder (3), thereby enabling said first and second electronic brakes (8 and 7) to control the operations of said first and second ball screw nuts (6 and 9).
2. The electric actuator according to claim 1, wherein said screw cylinder (3) is disposed on the outside of said motor (1), for connecting the shaft of said motor (1) to said connecting part (5) to thereby transmit the rotational force of said motor (1).
3. The electric actuator according to claim 1, wherein said screw cylinder (3) is provided with a plurality of springs (10) and slide grooves (21) that are disposed on the inner periphery thereof, said plurality of springs and slide grooves being adapted to drive said first and second electronic brakes (8 and 7) to control said first and second ball screw nuts (6 and 9).
4. The electric actuator according to claim 1, wherein said screw cylinder (3) is provided with a bearing (14) on the both sides of the end portion thereof, respectively, for the purpose of smoothly moving said outside cylinder (2).
5. The electric actuator according to claim 1, wherein said motor (1) is provided with a bearing (15) on the both sides of the outside thereof, respectively, for the purpose of moving a motor case and said screw cylinder (3).
6. The electric actuator according to claim 1, wherein said thrust bearings (11) have different arrangements in accordance with the rotational directions of said motor (1) and the directions of the balls of said first and second ball screw nuts (6 and 9).
7. The electric actuator according to claim 1, wherein said sensor (13), which is disposed on the surface of said fixed part (16) of said outside cylinder (2), carries out the measurement of the movement distance of said screw cylinder (3), such that said first and second electronic brakes (8 and 7) control the operations of said first and second ball screw nuts (6 and 9).
8. The electric actuator according to claim 3, wherein said thrust bearings (11) have different arrangements in accordance with the rotational directions of said motor (1) and the directions of the balls of said first and second ball screw nuts (6 and 9).