Process for controlling production of in-situ thermoplastic poly

Details Process for controlling production of in-situ thermoplastic poly Process for controlling production of in-situ thermoplastic poly

1995-05-12

1998-01-06

Weber, Thomas R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Effecting a change in a polymerization process in response...

526 65, 526901, 526351, C08F 234

Patent

active

057055769

ABSTRACT:
An improved gas-phase polymerization process for producing in-situ thermoplastic polyolefins in multiple reactors using high activity Ti/Al catalysts is provided. The improvement consists of developing a control parameter derived from eight integrated regions of the copolymer .sup.13 C NMR spectrum, defining the limits of the control parameter for the process, and operating the process to maintain the parameter within the defined limits. This is accomplished by adjusting the amount of ethylene fed to the secondary reactor and adjusting other process variables as required. Thermoplastic polyolefins, i.e., modified polypropylenes, having reduced hexane extractables and improved paint adhesion are also disclosed.

REFERENCES:
patent: 3220998 (1965-11-01), Berger
patent: 4003712 (1977-01-01), Miller
patent: 4048412 (1977-09-01), Caumartin et al.
patent: 4260710 (1981-04-01), Staiger et al.
patent: 4309521 (1982-01-01), Sato et al.
patent: 4338424 (1982-07-01), Morita et al.
patent: 4360650 (1982-11-01), Desvignes et al.
patent: 4420592 (1983-12-01), Kato et al.
patent: 4454299 (1984-06-01), Schweier et al.
patent: 4455405 (1984-06-01), Jaggard et al.
patent: 4547552 (1985-10-01), Toyota et al.
patent: 4582878 (1986-04-01), Chiba et al.
patent: 4703094 (1987-10-01), Raufast
patent: 4739015 (1988-04-01), Toyota et al.
patent: 4740550 (1988-04-01), Foster
patent: 4740551 (1988-04-01), Foster
patent: 4814377 (1989-03-01), Joyce
patent: 4820775 (1989-04-01), Shiga et al.
patent: 4863769 (1989-09-01), Lustig et al.
patent: 4882380 (1989-11-01), Ficker et al.
patent: 4902483 (1990-02-01), Raufast
patent: 4950631 (1990-08-01), Buehler et al.
patent: 4977210 (1990-12-01), Kerth et al.
patent: 4978722 (1990-12-01), Goko et al.
patent: 5006600 (1991-04-01), Buechner et al.
patent: 5034365 (1991-07-01), Buehler et al.
patent: 5037789 (1991-08-01), Buehler
patent: 5047468 (1991-09-01), Lee et al.
patent: 5051388 (1991-09-01), Buehler et al.
patent: 5104949 (1992-04-01), Buehler et al.
patent: 5126398 (1992-06-01), Lee et al.
patent: 5143883 (1992-09-01), Buehler et al.
patent: 5149738 (1992-09-01), Lee et al.
patent: 5221650 (1993-06-01), Buehler
patent: 5275991 (1994-01-01), Buehler et al.
Ross, J.F. et al., "An Improed Gas-Phase Polypropylene Process," Ind. Eng. Chem. Prod. Res. Dev., 1985, 24, pp. 149-154.
Randall, J.C., "A Review of High Resolution Liquid .sup.13 Carbon Nuclear Magnetic Resonance Characterizations of Ethylene-Based Polymers," JMS-Rev. Macromol. Chem. Phys., C29 (2 & 3), 201-317 (1989). Marcel Dekker, Inc.
GM Test Procedure 9911P: "Scuff Resistance Test for Painted TPO Plastics," (Draft, Jan. 1994) pp. 1-2.
Ford Laboratory Test Method BI 107-5: "Thermal Shock Test for Paint Adhesion," Product & Manufacturing Engineering Staff, Apr. 10, 1990, pp. 1-7.

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