Process for the manufacture of oxazoline and/or oxazine-modified

Details Process for the manufacture of oxazoline and/or oxazine-modified Process for the manufacture of oxazoline and/or oxazine-modified

1980-01-04

1981-10-27

Hamrock, William F.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525357, 525369, 525375, 525540, C08F 820, C08F 824

Patent

active

042974526

ABSTRACT:
A novel process is disclosed for increasing the amount of grafted polymer formed during the production of polyamide-modified macroporous polystyrene/divinylbenzene cross-linked beads. Greater selectivity for oxazolination and/or oxazination (grafting) of the chloromethylated polystyrene (CMPS) beads over homopolymer formation is achieved by forming an iodized cross-linked vinyl-addition polymer which is then contacted with an excess of oxazoline or oxazine until up to about 50 percent of said oxazoline or oxazine monomer is reacted. Subsequent hydrolysis of these polyamide-modified resins produces polyamine anion-exchange resins which exhibit greater than 2 times the weak base capacities of conventional anion-exchange resins.

REFERENCES:
patent: 4009326 (1977-02-01), Hort
patent: 4143100 (1979-03-01), Schulz et al.
Angew, Chem. Internat. Edit., vol. 5 (1966), No. 10, pp. 875 & 881, by Selliger et al.
Graft Copolymerization of 2-Methyl-2-Oxazoline Macromolecules, vol. 8, No. 4, pp. 390-396, Saegusa et al., Jul. 1975.

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