Claims
- 1. A process for purifying a styrenic polymer which comprises adding a poor solvent to a crystalline styrenic polymer having a high degree of syndiotactic configuration which is produced by the use of a catalyst comprising (A) an aluminoxane or a coordination complex compound comprising a cation and an anion in which a plurality of radicals are bonded to a metal and (B) a transition metal compound, and treating said polymer in a state of slurry for both, the catalyst deactivation and the polymer deashing in one step; wherein said poor solvent is a compound represented by the general formula (I)
- R.sup.14 -OH
- wherein R.sup.14 is an C.sub.1 -C.sub.6 alkyl or a compound represented by the general formula (II)
- NR.sup.15.sub.3
- wherein each R.sup.15 is a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, and when R.sup.15 is an alkyl group, each R.sup.15 may be the same or different and the amount of that poor solvent to be added is 30 to 95% by weight based on the total amount of the crystalline styrene polymer and the poor solvent to be added.
- 2. The process for purifying a styrenic polymer according to claim 1 wherein the water content in said poor solvent is at least 15 ppm and at most 10,000 ppm.
- 3. The process for purifying a styrenic polymer according to claim 1 wherein the amount of the poor solvent to be added is 30 to 95% by weight based on the total amount of said crystalline styrenic polymer and said poor solvent to be added.
- 4. The process for purifying a styrenic polymer according to claim 2 wherein the amount of the poor solvent to be added is 30 to 95% by weight based on the total amount of said crystalline styrenic polymer and said poor solvent to be added.
- 5. A process for purifying a styrenic polymer which comprises adding a poor solvent to a crystalline styrenic polymer having a high degree of syndiotactic configuration which is produced by the use of a catalyst comprising (A) an aluminoxane or a coordination complex compound comprising a cation and an anion in which a plurality of radicals are bonded to a metal and (B) a transition metal compound and treating said polymer in a form of a dispersion of solid particles, and, both, deactivating said catalyst and deashing said polymer in one step; wherein said poor solvent is a compound represented by the general formula (III')
- R.sup.16 -OH
- wherein R.sup.16 is a hydrogen atom or an C.sub.1 -C.sub.6j alkyl group or a compound represented by the general formula (II') wherein each R.sup.15 is a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, and when R.sup.15 is an alkyl group, each R.sup.15 may be the same or different and the amount of said poor solvent to be added is 0.1 to 30% by weight based on the total amount of said crystallized styrenic polymer and said poor solvent to be added.
- 6. A process for purifying a styrenic polymer which comprises adding a mixed solvent of a poor solvent and a swelling agent to a crystalline styrenic polymer having a high degree of syndiotactic configuration which is produced by the use of a catalyst comprising (A) an aluminoxane or a coordination complex compound comprising a cation and an anion in which a plurality of radicals are bonded to a metal and (B) a transition metal compound, and treating said polymer in a form of a dispersion of solid particles, and, both, deactivating said catalyst and deashing said polymer in one step; wherein said poor solvent is a compound represented by the general formal (III')
- R.sup.16 -OH
- wherein R.sup.16 is a hydrogen atom or an C.sub.1 -C.sub.6 alkyl group or a compound represented by the general formula (II')
- NR.sup.15.sub.3
- wherein each R.sup.15 is a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, and when R.sup.15 is an alkyl group, each R.sup.15 may be the same or different and the amount of said mixed solvent of the poor solvent and the swelling agent to be added is 0.1 to 30% by weight based on the total amount of said crystalline styrenic polymer and said mixed solvent of the poor solvent and the swelling agent.
- 7. The process for purifying a styrenic polymer according to claim 5, wherein the amount of said poor solvent to be added is 0.1 to 30% by weight based on the total amount of said crystalline styrenic polymer and said poor solvent to be added.
- 8. The process for purifying a styrenic polymer according to claim 6 wherein the amount of the mixed solvent of a poor solvent and a swelling agent to be added is 0.1 to 30% by weight based on the total amount of said crystalline styrenic polymer and the mixed solvent of a poor solvent and a swelling agent to be added.
Priority Claims (3)
Number |
Date |
Country |
Kind |
5-002221 |
Jan 1993 |
JPX |
|
5-219984 |
Sep 1993 |
JPX |
|
5-240826 |
Sep 1993 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/290,786, filed on Sep. 6, 1994, now abandoned, which was filed as International Application No. PCT/JP94/00023, on Jan. 11, 1994.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5247020 |
Nakano et al. |
Sep 1993 |
|
5321122 |
Kuramoto et al. |
Jun 1994 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
290786 |
Sep 1994 |
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