Process for dry cationization of polyvinyl alcohol

Details Process for dry cationization of polyvinyl alcohol Process for dry cationization of polyvinyl alcohol

1989-11-20

1991-03-19

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...

525 62, 525374, C08F 800

Patent

active

050011910

ABSTRACT:
A process for the dry cationization of polyvinyl alcohol (PVA) by reaction of alkylidene epoxides with PVA in alkaline medium in the presence of water, in which the reaction mixture contains 11 to 30 weight % of water, based on its total amount, and 1 to 4 weight % of an alkali metal or alkaline earth metal hydroxide or alkaline earth metal oxide, based on the quantity of PVA. As the cationizing agent there are used alkylidene epoxides or their mixtures having the general formula: ##STR1## wherein n=1, 2 or, 3, R.sup.1, R.sup.2 and R.sup.3 represent the same or different alkyl residues having 1 to 18 carbon atoms or R.sup.1 represents the benzyl or --C.sub.2 H.sub.4 OH, and X.sup.- denotes chloride, bromide, sulfate or acetate. Instead of alkylidene epoxides, the corresponding halohydrins, e.g. chlorohydrin or bromohydrin, can be used.

REFERENCES:
patent: 3121607 (1964-02-01), Ohno et al.
patent: 3684784 (1972-08-01), Marze
patent: 3685953 (1972-08-01), Curelier
patent: 3959406 (1976-05-01), Tsuji et al.
patent: 4109068 (1978-08-01), Allen
patent: 4127563 (1978-11-01), Rankin et al.
patent: 4182804 (1980-01-01), Serboli et al.
patent: 4281109 (1981-07-01), Jarowenko et al.
patent: 4308189 (1981-12-01), Moritani et al.
patent: 4311805 (1982-01-01), Moritani et al.
patent: 4567221 (1986-01-01), Maruyama et al.
patent: 4645794 (1987-02-01), Davis et al.

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