Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-09-20
1992-08-18
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525247, 525323, C08F29708
Patent
active
051400626
ABSTRACT:
Continuous processes for producing high melting and viscoelasting polypropylene or ethylene-propylene copolymer are provided.
These processes are characterized by (1) using two or more polymerizers connected in series, (2) supplying the whole amount of a catalyst and a molecular weight regulator (hydrogen) in the first tank and (3) a degasification amount of each tank in the second and subsequent tanks being 0.5 to 10 V.sub.1 /Hr (wherein V.sub.1 is a volume of the tank) calculated at 0.degree. C. and 0 Kg/cm.sup.2 G. In the process for producing the copolymer, (4) monomers having an ethylene content of 5 wt % or less are supplied in the first step. According to the processes of the present invention, polymers having a broad molecular weight distribution and good fluidity upon extrusion molding can be obtained and operational control in production is simply made.
REFERENCES:
patent: 2978441 (1961-04-01), Sherk
patent: 4760113 (1988-07-01), Chiba et al.
patent: 4771103 (1988-09-01), Chiba et al.
Chiba Hiromasa
Kawazoe Shunji
Oka Takahiro
Chisso Corporation
Philpitt Fred
Smith Edward J.
LandOfFree
Continuous process for producing high molten viscoelastic polypr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous process for producing high molten viscoelastic polypr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for producing high molten viscoelastic polypr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1249591