Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1982-01-04
1983-12-20
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
524458, 525310, 525902, C08F26504
Patent
active
044219016
ABSTRACT:
Pourable rubber powders comprising particles having an average diameter of from 0.01 to 10 mm which contain, polymerized thereon, a shell of the polymer or copolymer of one or more vinyl monomers in a quantity of from 2 to 20% by weight, based on the rubber, and the core rubber is a latex polymer, the latex particles of which are composed of a core polymer and a sheath polymer, the core and sheath differing in their chemical composition and at least the sheath polymer being a diene or acrylate rubber having glass transition temperatures of below 0.degree. C., and a process for the preparation of such rubber powders, wherein a latex of an approximate rubber is completely broken with the formation of an aqueous suspension of the rubber; from 2 to 20% by weight, based on the rubber, of one or more vinyl monomers which form polymers having glass transition temperatures of above 25.degree. C. are then introduced into the suspension; and the monomer(s) is/are polymerized, optionally after adding a radical-forming catalyst.
REFERENCES:
patent: 3787522 (1974-01-01), Dickie
patent: 3833682 (1974-09-01), Dickie
patent: 3959408 (1976-05-01), Yusa
patent: 3985703 (1976-10-01), Ferry
patent: 4026970 (1977-05-01), Backderf
patent: 4082895 (1978-04-01), Backderf et al.
patent: 4141932 (1979-02-01), Butler
patent: 4205019 (1980-05-01), Shima et al.
patent: 4247434 (1981-01-01), Lovelace
patent: 4264678 (1981-04-01), Nelsen
patent: 4265939 (1981-05-01), Tebbens
Lindner Christian
Ott Karl-Heinz
Bayer Aktiengesellschaft
Michl Paul R.
LandOfFree
Rubber powders does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rubber powders, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rubber powders will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-108475