Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2002-05-21
2004-09-14
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S151000, C526S160000, C526S943000, C526S308000, C526S348200, C526S134000
Reexamination Certificate
active
06790917
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a process for producing a polymer of a vinyl compound having a bulky substituent.
2. Description of Related Art
In the field of polymerization of olefins such as polyethylene and polypropylene, a development in which a polymer different in properties from ordinary polymers can be produced has been done by appearance of single-site catalyst such as so-called metallocene and non-metallocene catalysts.
With respect to polymerization of a vinyl compound having a bulky substituent such as vinylcyclohexane, application of such a catalyst is proposed, and for example, processes for producing copolymers of ethylene and vinylcyclohexane are disclosed in Polymer Science USSR, Vol.32, No.9, 1868-1872(1990), and Polymer, vol.134(9), 1941(1993).
Such a polymer of the vinyl compound having a bulky substituent exhibits similar properties to polyvinyl chloride, therefore are expected as non-chlorine materials. However, in the known process, the copolymerizability of the vinyl compound having a bulky substituent used is low (namely, the ratio of units derived from the vinyl compound having a bulky substituent contained in a obtained polymer is rather low compared to the ratio of the vinyl compound fed in polymerization). Therefore, it was difficult to obtain efficiently a copolymer having high ratio of the units derived from the vinyl compound having a bulky substituent, further also to obtain a homopolymer of the vinyl compound having a bulky substituent.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a process for producing efficiently a homopolymer of the vinyl compound having a bulky substituent or a copolymer containing units derived from the vinyl compound having a bulky substituent with a good copolymerizability.
Namely, the present invention relates to a process for producing a polymer which comprises polymerizing a vinyl compound (I) represented by the general formula CH
2
═CH—R, wherein steric parameters Es and B1 of the substituent R are respectively −1.64 or less and 1.53 or more or a vinyl compound (II) represented by the general formula CH
2
═CH—R′, wherein a substituent R′ is a secondary or tertiary alkyl group, in the presence of a catalyst obtained by combining:
(A) a transition metal compound represented by the general formula [1]
wherein M represents a transition metal; each of Cp1 and Cp2 independently cyclopentadiene type anion skeleton; each of R1 and R2 independently represents a hydrogen atom or hydrocarbon group having 1 to 20 carbon atoms, and they may connect and form a ring structure through C; X represents a halogen atom, hydrocarbon group having 1 to 20 carbon atoms or hetero atom; and n represents a number of 0 to 4;
(B) at least one aluminum compound selected from the following (B1) to (B3):
(B1) an organoaluminum compound represented by the general formula E
1
a
AlZ
3−a
,
(B2) a cyclic aluminoxane having a structure represented by the general formula {—Al(E
2
)—O—}
b
, and
(B3) a linear aluminoxane having a structure represented by the general formula E
3
{—Al(E
3
)—O—}
c
AlE
3
2
,
(wherein E
1
to E
3
respectively represents a hydrocarbon group having 1 to 8 carbon atoms, and all of E
1
, E
2
and E
3
may be the same or different; Z represents a hydrogen atom or a halogen atom, and all of Z may be the same or different; a represents a numeral satisfying 0<a≦3; b represents an integer of not less than 2; and c represents an integer of not less than 1); and
(C) at least one boron compound selected from the following (C1) to (C3):
(C1) a boron compound represented by the general formula BQ
1
Q
2
Q
3
,
(C2) a boron compound represented by the general formula G
+
(BQ
1
Q
2
Q
3
Q
4
)
31
, and
(C3) a boron compound represented by the general formula (L—H)
+
(BQ
1
Q
2
Q
3
Q
4
)
−
(wherein B is a boron atom in the trivalent valence state, Q
1
-Q
4
are a halogen atom, a hydrocarbon group, a halogenated hydrocarbon group, a substituted silyl group, an alkoxy group or a di-substituted amino group, which may be the same or different, respectively. G
+
is an inorganic or organic cation, L is a neutral Lewis base, and (L—H)
+
is a Br&phgr;nsted acid.)
REFERENCES:
patent: 5594081 (1997-01-01), Uchino et al.
patent: 5869586 (1999-02-01), Riedel et al.
patent: 6040469 (2000-03-01), Riedel et al.
patent: 6225423 (2001-05-01), Andell et al.
patent: 6288193 (2001-09-01), Iseki et al.
patent: 6388031 (2002-05-01), Oi et al.
patent: 6420506 (2002-07-01), Oi et al.
patent: 2002/0091217 (2002-07-01), Oi et al.
patent: 2002/0198340 (2002-12-01), Oi
patent: 199 51 277 (2000-05-01), None
patent: 0513380 (1992-11-01), None
patent: 0 513 380 (1992-11-01), None
patent: 1 197 501 (2002-04-01), None
patent: WO 93/21242 (1993-10-01), None
Longo et al., Makromol Chem., vol. 191, pp. 2387-2396, (1990).
Nekhaeva et al., Polymer Science USSR, vol. 32, No. 9, pp. 1868-1872, (1990).
Mani et al., Polymer, vol. 34, No. 9, pp. 1941-1943, (1993).
Lofgren et al., “Ethylene Copolymerization and Vinylcyclohexane using different Metallocene Catalyst Systems”, Organometallic Catalysts and Olefin Polymerization New Millenium International Conference, Jun. 18-22, 2000, Oslo, Norway.
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