Process for the preparation of porous polymers and polymers obtainable thereof
First Claim
1. A process for preparing porous olefin polymers, having a porosity of greater than 0.54 cc/g, comprising putting into contact in a polymerization reactor having a reactor temperature initially at a temperature T1, one or more olefins of formula CH2═
- CHR1, R1 being hydrogen, a C1–
C20-alkyl or a C6–
C12-aryl group with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal -π
bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the reactor temperature up to a polymerization temperature, wherein(I) if the temperature T1 is lower than 40°
C., the reactor temperature is raised up to the polymerization temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the reactor temperature is raised up to T2 under the following condition;
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Abstract
A process for preparing porous olefin polymers comprising bringing into contact in a polymerization reactor, at a temperature T1, one or more olefins of the formula (I) CH2═CHR1, R1 being hydrogen, a C1–C20-alkyl or a C6–C12-aryl group, with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal-π bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the temperature up to the polymerization temperature, said process being characterized in that: a) if the temperature T1 is lower than 40° C., the temperature is raised up to the polymerization temperature is such a way that, for a time of at least one minute after the introduction temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the temperature of the reaction T2 fulfills the following condition of formula (II) wherein m is the time expressed in minutes employed for reaching the temperature T2; or b) if temperature T1 is 40° C. or higher, the reactor is maintained for a time of at least one minute at a temperature of at least 40° C.
20 Citations
12 Claims
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1. A process for preparing porous olefin polymers, having a porosity of greater than 0.54 cc/g, comprising putting into contact in a polymerization reactor having a reactor temperature initially at a temperature T1, one or more olefins of formula CH2═
- CHR1, R1 being hydrogen, a C1–
C20-alkyl or a C6–
C12-aryl group with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal -π
bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the reactor temperature up to a polymerization temperature, wherein(I) if the temperature T1 is lower than 40°
C., the reactor temperature is raised up to the polymerization temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the reactor temperature is raised up to T2 under the following condition; - View Dependent Claims (2, 3, 4, 5)
- CHR1, R1 being hydrogen, a C1–
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6. A solid catalyst system obtained by contacting in any order:
(A) a porous polymer, having a porosity of greater than 0.54 cc/g, obtained in a process comprising putting into contact in a polymerization reactor having a reactor temperature initially at a temperature T1, one or more olef ins of formula CH2═
CHR1, R1 being hydrogen, a C1–
C20-alkyl or a C6–
C12-aryl group with a catalyst obtained by reacting the solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal-π
bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the reactor temperature up to a polymerization temperature, wherein(I) if the temperature T1 is lower than 40°
C., the reactor temperature is raised up to the polymerization temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the reactor temperature is raised up to T2 under the following condition;- View Dependent Claims (7, 8, 9)
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10. A process for polymerization of one or more olef ins of formula CH2═
- CHR1, R1 being hydrogen, a C1–
C20-alkyl or a C6–
C12-aryl group, comprising the following steps;(A) polymerizing said olefin CH2═
CHR1, in one or more reactors, by a process comprising putting into contact in a polymerization reactor having a reactor temperature initially at a temperature T1, one or more olef ins of formula CH2═
CHR1, R1 being hydrogen, a C1–
C20-alkyl or a C6–
C12-aryl group with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal-π
bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the reactor temperature up to a polymerization temperature, wherein(I) if the temperature T1 is lower than 40°
C., the reactor temperature is raised up to the polymerization temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the reactor temperature is raised up to T2 under the following condition;
- CHR1, R1 being hydrogen, a C1–
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11. A process for polymerizing a heterophasic copolymer of propylene comprising the following steps:
(A) polymerizing, in at least one reactor, propylene or its mixtures with one or more olefins CH2═
CHR4, R4 being hydrogen, a C2–
C20-alkyl or a C6–
C12-aryl group, by a process comprising putting into contact in a polymerization reactor having a reactor temperature initially at a temperature T1, one or more olefins of formula CH2═
CHR1, R1 being hydrogen, a C1–
C20-alkyl or a C6–
C12-aryl group with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal- π
bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the reactor temperature up to a polymerization temperature, wherein(I) if the temperature T1 is lower than 40°
C., the reactor temperature is raised up to the polymerization temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the reactor temperature is raised up to T2 under the following condition;- View Dependent Claims (12)
Specification