Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-09-11
1993-01-12
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525241, 525 70, 525 71, 525316, C08L 2504, C08L 2516
Patent
active
051791668
ABSTRACT:
There is disclosed a monovinylidene aromatic polymer resin having a specific rubber particle size distribution that provides surprisingly improved combinations of product properties, such as gloss, impact resistance and tensile strength. Such resin has a first group of smaller particles having a volume average particle diameter of from about 0.2 to about 0.6 micrometers and a second group of larger particles having a volume average particle diameter of from about 2.5 to about 5 micrometers. In these resins it is further necessary in this specific rubber particle size distribution, based on 100 parts by weight rubber or rubber equivalent, that (a) particles constituting from about 20 to about 60 parts by weight of the rubber have diameters of from about 0.1 to about 0.8 micrometers, (b) particles constituting from about 60 to about 20 parts by weight of the rubber have diameters of from about 2 to about 6 micrometers, and (c) that there be a specific amount of intermediate size particles constituting from about 10 to about 30 parts by weight of the rubber and having diameters between about 0.8 and about 2 micrometers. Also disclosed is a process for preparing such resins in a simplified production process wherein the rubber which is used has distinct high and low molecular weight components, the high molecular weight component having a weight average molecular weight at least about two and one half times greater than the weight average molecular weight of the low molecular weight component.
REFERENCES:
patent: 2727884 (1955-12-01), McDonald et al.
patent: 3668162 (1972-06-01), Wilt
patent: 4146589 (1979-03-01), Dupre
patent: 4153645 (1979-05-01), Lanza
patent: 4183877 (1980-01-01), Ibaragi et al.
patent: 4214056 (1980-07-01), Lavengood
patent: 4221883 (1980-09-01), Mott et al.
patent: 4334039 (1982-06-01), Dupre
patent: 4340690 (1982-07-01), Lal et al.
patent: 4340691 (1982-07-01), Lal et al.
patent: 4493922 (1985-01-01), Echte et al.
patent: 4713420 (1987-12-01), Henton
patent: 4785051 (1988-11-01), Henton
Lenz, V. F, Wiss, Mikrokogie 63, pp. 50-60 Apr. 1955.
Schwartz, H.A., Metals and Alloys, Jun. 1934, p. 139.
Chemical Abstracts, 93:240501c Apr. 1980.
Clark W. R. H.
Seidleck James J.
The Dow Chemical Company
LandOfFree
Monovinylidene aromatic polymers with improved properties and a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Monovinylidene aromatic polymers with improved properties and a , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monovinylidene aromatic polymers with improved properties and a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1220975