Claims
- 1. A process for producing a funtionalized thermoplastic polymer having improved color in an extruder reactor comprising:
- (a) introducing a thermoplastic polymer and water in an extruder reactor, said water introduced in an amount equal to about 0.005 to 5.0 percent by weight polymer feed rate into said extruder reactor,
- (b) conveying said thermoplastic polymer to a reaction zone of said extruder reactor where the thermoplastic polymer reacts with a functional compound;
- (c) conveying said polymer into a purification zone of said extruder reactor wherein impurities produced by the reaction of the preceding step are removed from or neutralized in said polymer;
- (d) repeating the steps of (b) and (c) on the polymer of step (c) with at least a second and different set or reagents than the functional compound of step (b), as necessary until the desired product is obtained.
- 2. The process of claim 1, wherein said water is introduced into said extruder reactor in an amount equal to 0.05 to 0.5 weight percent of a polymer of water per gram of polymer.
Parent Case Info
This is a divisional of application Ser. No. 07/989,289, filed Dec. 11, 1992 now U.S. Pat. No. 5,424,367, which is continuation-in-part of application Ser. No. 07/807,282, filed Dec. 13, 1991 now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0349085 |
Jan 1990 |
EPX |
Non-Patent Literature Citations (2)
Entry |
Patent Abstracts of Japan, vol. 2, No. 306 (C-522) (3153) 19 Aug. 1988 JP, A, 63 077 904 (Denki Kagaku Kogyo K.K.) 4 Aug. 1988. |
Patent Abstracts of Japan, vol. 14, No. 131 (C-700) (4074) 13 Mar. 1990 JP, A, 20 04 806 (Mitsubishi Monsanto Chem. Co.) 9 Jan. 1990. |
Divisions (1)
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Number |
Date |
Country |
Parent |
989289 |
Dec 1992 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
807282 |
Dec 1991 |
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