Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1994-03-16
1996-03-26
Clark, W. Robinson H.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525305, 525365, C08L 2310, C08L 2316, C08L 2326
Patent
active
055021140
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to polyolefins whose terminals are modified with (meth)acrylic acid derivative units or styrene derivative units.
BACKGROUND OF THE INVENTION
In the polymerization of .alpha.-olefins such as propylene, etc. by the Ziegler Natta catalyst of the prior art, a chain-transfer reaction or chain termination reaction takes place and accordingly, it is difficult to modify one of the terminals of the polymer with substituents, etc.
The object of the present invention is to provide such a linear polyolefin wherein one of the terminals of polypropylene or ethylene-propylene random copolymer is modified with methacrylic acid (acrylic acid) derivative units or styrene derivative units to give a substantially monodispersed system.
SUMMARY OF THE INVENTION
The inventors have made various studies to achieve the object and consequently, have found that the object of the present invention can be achieved by reacting a living polypropylene or ethylene-propylene random copolymer obtained using a specified catalyst accompanying no chain-transfer reaction nor chain termination reaction, with a methacrylic acid (acrylic acid) derivative or styrene derivative.
DETAILED DESCRIPTION OF THE INVENTION
Accordingly, the present invention provides such a terminal-modified linear polyolefin wherein one of the terminals of polypropylene or ethylene-propylene random copolymer is modified with a substituent represented by the following General Formula I: ##STR1## R' is a hydrogen atom or methyl group, X is a substituent having no active hydrogen atom and excluding saturated hydrocarbon groups and n is an integer of 2 to 4.
The terminal-modified linear polyolefin of the present invention is ordinarily obtained in the form of such a composition that one of the terminals is represented by the following General Formula II, ##STR2## wherein R and Y have the same meaning as described above and m is a numeral of 0.1 to 100.
The terminal-modified linear polyolefin of the present invention can be prepared by polymerizing propylene or random-copolymerizing ethylene and propylene in the presence of a catalyst consisting essentially of an organoaluminum compound and a vanadium compound represented by the following General Formula III, ##STR3## wherein R.sup.1 to R.sup.3 are hydrogen atoms or hydrocarbon groups of 1 to 8 carbon atoms and at least one of R.sup.1 to R.sup.3 must be a hydrogen atom, but all of R' to R.sup.3 must not be hydrogen atoms, thus obtaining respectively living linear polypropylene or living linear ethylene-propylene random-copolymer, and then reacting the living polypropylene or living ethylene-propylene random-copolymer with a methacrylic acid (acrylic acid) derivative or a styrene derivative represented by the following General Formula IV, ##STR4## wherein R has the same meaning as described above, Y' is ##STR5## and R', X and n have the same meaning as described above. When Y' is ##STR6## following the above described reaction, the reaction product is reacted with an aqueous solution of NaOH to synthesize a terminal-modified polyolefin having sodium (metha)acrylate at the terminal thereof and the terminal of sodium (metha)acrylate is contacted with a proton ##STR7##
CATALYST
The vanadium compound used in the present invention is represented by the following General Formula III, ##STR8## wherein R.sup.1 to R.sup.3 have the same meanings as described above.
Specific examples of the compound included in the above described general formula will now be illustrated. hydrocarbon groups: R.sup.1 /R.sup.3 : CH.sub.3 /CH.sub.3, CH.sub.3 /C.sub.2 H.sub.5, C.sub.2 H.sub.5 /C.sub.2 H.sub.5, CH.sub.3 /C.sub.6 H.sub.5, C.sub.2 H.sub.5 /C.sub.6 H.sub.5, C.sub.6 H.sub.5 /C.sub.6 H.sub.5, H.sub.5 CH.sub.2, C.sub.2 H.sub.5 /C.sub.6 H.sub.5 CH.sub.2, C.sub.6 H.sub.5 /C.sub.6 H.sub.5, CH.sub.2 a hydrogen atom and the other is a hydrocarbon group: CH.sub.3 /C.sub.2 H.sub.5, C.sub.2 H.sub.5 /C.sub.2 H.sub.5, C.sub.2 H.sub.5 /CH.sub.3, CH.sub.3 /C.sub.6 H.sub.5, C.sub.6 H.sub.5 /C.sub.2 H.sub.5
REFERENCES:
patent: 4981896 (1991-01-01), Okada et al.
patent: 5328956 (1994-07-01), Hasebe et al.
Aijima et al., "Modified Polyolefin Composites", Chemical Abstracts, vol. 75, No. 26, Abstract No. 152609s (Dec. 27, 1971).
Furuhashi Hiroyuki
Murakami Naomi
Ueki Satoshi
Usui Miyuki
Clark W. Robinson H.
Tonen Corporation
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