Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-02-21
1990-04-24
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525243, 526213, 526216, 526342, 526233, 526234, C08F 226
Patent
active
049201786
ABSTRACT:
An .alpha.-methylstyrene/acrylonitrile copolymer obtainable by emulsion polymerization which, in combination with other polymers, particularly PVC, enables alloys of outstanding thermal stability and color stability to be produced and, in addition, has a high heat distortion temperature and shows good fogging behavior and which is obtained by radically initiated inflow copolymerization of a mixture of 30 to 32 parts by weight acrylonitrile and 68 to 70 parts by weight .alpha.-methylstyrene in the presence of an emulsifier containing carboxyl groups. The polymerization is conducted in such a way that a seed latex of the same copolymer or of an analogous copolymer is introduced before addition of the monomers is commenced, the reaction temperature is kept between 75.degree. and 82.degree. C. and the molar ratio of emulsifier to initiator is between 4 and 6.
REFERENCES:
patent: 3732336 (1973-05-01), Duke et al.
patent: 4294946 (1981-10-01), Minematsu et al.
patent: 4427832 (1984-01-01), Yagi et al.
patent: 4755576 (1988-07-01), Zabrocki et al.
Braese Hans-Eberhard
Koch Otto
Lindner Christian
Zabrocki Karl
Bayer Aktiengesellschaft
Schofer Joseph L.
Teskin F. M.
LandOfFree
Seeded emulsion polymerization of .alpha.-methylstyrene and acry does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Seeded emulsion polymerization of .alpha.-methylstyrene and acry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seeded emulsion polymerization of .alpha.-methylstyrene and acry will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-35312