Claims
- 1. A syndiotactic polypropylene wax having a syndiotactic pentad fraction (rrrr) of at least 0.7 as measured by .sup.13 C-NMR melting point (Tm) in a range of 120.degree.-170.degree. C. as measured by a differential scanning calorimeter (DSC), and an intrinsic viscosity (�.eta.!) in a range of 0.01-0.4 dl/g as measured at 135.degree. C. in a tetralin solution, wherein said wax is prepared by a process comprising polymerizing propylene in a reaction vessel (i) while maintaining at 10% or higher a hydrogen partial pressure of a gas phase contained in the reaction vessel and formed of the propylene and hydrogen and (ii) while using a solid catalyst formed of:
- (A) a transition metal compound represented by the following formula �I!: ##STR4## in which A.sup.1 represents a cyclopentadienyl group, A.sup.2 represents a fluorenyl group or a derivative thereof, A.sup.3 and A.sup.4 individually represent an alkyl group having 1-10 carbon atoms, an aryl group having 6-20 carbon atoms, an alkylaryl group, an arylalkyl group, a halogenated aryl group, a hydrocarbon group containing a hetero atom such as oxygen, nitrogen, sulfur or silicon, or a hydrogen atom, Q connects A.sup.1 and A.sup.2 to each other and represents a hydrocarbon group containing silicon, germanium or tin, A.sup.3 and A.sup.4 may be coupled together to form a ring structure among A.sup.3, A.sup.4 and Q, R.sup.1 and R.sup.2 individually represent a halogen or hydrogen atom, an alkyl group having 1-10 atoms, and aryl group having 6-20 carbon atoms, an alkylaryl group or an arylalkyl group, and M represents titanium, zirconium or hafnium, or (A') a reaction product between the transition metal compound and an organometallic compound;
- (B) an aluminoxane;
- (C) a fine particulate carrier; and
- (D) optionally an organoaluminum compound.
- 2. The syndiotactic polypropylene wax of claim 1, wherein the intrinsic viscosity is 0.05-0.20 dl/g.
- 3. The syndiotactic polypropylene wax of claim 1, wherein an enthalpy of melting (.DELTA.Hm) is 5-20 cal/g.
- 4. The syndiotactic polypropylene wax of claim 1, wherein an enthalpy of melting (.DELTA.Hm) is 5-15 cal/g.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4-079551 |
Apr 1992 |
JPX |
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4-087083 |
Apr 1992 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/037,423, filed Mar. 26, 1993, now abandoned.
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Continuations (1)
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Number |
Date |
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Parent |
37423 |
Mar 1993 |
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