Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-05-23
1999-11-16
Dawson, Robert
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525243, 525316, 5253329, 5253333, C08G 6348
Patent
active
059859970
ABSTRACT:
A continuous bulk polymerization process for making a high gloss, high impact strength polystyrene based resin having a bimodal particle size distribution containing capsule particles having an average size of 0.2 to 0.6 microns and cellular particles having an average particle size of 1.2 to 8.0 microns. The process comprises three reaction zones in series where styrene and a styrene-butadiene copolymer are fed to the first reaction zone which is maintained at pre-phase inversion conditions and no particles are allowed to form. The capsule particles form in the second reaction zone which is maintained at post-phase inversion conditions. Polybutadiene is introduced into the third reaction zone which is also maintained at post-phase inversion conditions. The cellular morphology particles form in the third reaction zone. The resultant bimodal particle size polymer mixture may be subjected to devolitilization after the third reaction zone or, alternatively, the mixture can be subjected to further polymerization in one or more finishing reactors prior to polymerization.
REFERENCES:
patent: 4146589 (1979-03-01), Dupre
patent: 4282334 (1981-08-01), Walter
patent: 4334039 (1982-06-01), Dupre
patent: 4493922 (1985-01-01), Echte
patent: 4777210 (1988-10-01), Sosa et al.
patent: 5039714 (1991-08-01), Kasahara
patent: 5294656 (1994-03-01), Okamoto
patent: 5334658 (1994-08-01), Blumenstein
patent: 5428106 (1995-06-01), Schrader
patent: 5491195 (1996-02-01), Schrader
patent: 5756579 (1998-05-01), Fornasari et al.
Bowen Kenneth E.
Hanner Michael J.
Aylward D.
Chevron Chemical Company
Dawson Robert
De Jonghe Thomas G.
Tuck David M.
LandOfFree
In situ process for making a bimodal HIPS having both high gloss does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with In situ process for making a bimodal HIPS having both high gloss, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In situ process for making a bimodal HIPS having both high gloss will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1325802