Crosslinked seeded copolymer beads and process of manufacture

Details Crosslinked seeded copolymer beads and process of manufacture Crosslinked seeded copolymer beads and process of manufacture

1995-06-07

1996-12-17

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

521 25, 521 30, 525344, 525353, 525360, C08F 838, C08F 834, C08F 856

Patent

active

055854087

ABSTRACT:
Seeded cation-exchange resin beads are particularly susceptible to oxidative degradation which results in the leaching of organic carbon fragments. The leachability of organic carbon fragments of molecular weights greater than 1000 g/mol is reduced to less than 800 ppm by effectively crosslinking the copolymers that comprise the seeded cation-exchange in beads Crosslinking can be achieved either during sulfonation by increasing sulfone bridge formation or before sulfonation by either alkylene bridge formation or by incorporation and subsequent activation of a crosslinkable functionality in the copolymer that forms the seed in the seeded polymer bead process.

REFERENCES:
patent: 4177331 (1979-12-01), Amick
patent: 4263407 (1981-04-01), Reed, Jr.
patent: 4419245 (1983-12-01), Barrett et al.
patent: 4486313 (1984-12-01), Meitzner
patent: 4564644 (1986-01-01), Harris
patent: 4698394 (1987-10-01), Wong
patent: 4708994 (1987-11-01), Wong
patent: 4950332 (1990-08-01), Stringfield et al.
patent: 5068255 (1991-11-01), Harris
patent: 5231115 (1993-07-01), Harris
patent: 5310809 (1994-05-01), Pabon, Jr.
D. H. Freeman, "Homogeneous Sulfonation of Styrene-Divinylbenzene Copolymers with Oleum in Organic Solvents", Israel Journal of Chemistry, vol. 7, 1969, pp. 741-749.
S. Goldstein and G. Schmuckler, "Sulfone Formation During the Sulfonation of Crosslinked Polystyrene", Ion Exchange and Membranes, vol. 1, 1972, pp. 63-66.
F. Helfferich, "Ion Exchange", (1962) 53 (New York) McGraw Hill.

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