Cellosize HEC

Table 2. Synthesis of HMHEC polymers by phase transfer catalysis from CELLOSIZE HEC QP-300...

Cellosize HEC cellulose hydroxyethyl ether cellulose hydr-oxyethylate ethylhydroxy cellulose ethylose HEC HE cellulose 2-hydroxyethyl cellulose ether hydroxyethyl ether cellulose hydroxyethyl starch hyetellose Natrosol oxycellu-lose Tylose PHA. 

The phase transfer catalyzed alkylation reaction of dodecyl phenyl glycidyl ether (DPGE) with hydroxyethyl cellulose (HEC) was studied as a mechanistic model for the general PTC reaction with cellulose ethers. In this way, the most effective phase transfer catalysts and optimum reaction concentrations could be identified. As a model cellulose ether, CELLOSIZE HEC" was chosen, and the phase transfer catalysts chosen for evaluation were aqueous solutions of choline hydroxide, tetramethyl-, tetrabutyl-, tetrahexyl-, and benzyltrimethylammonium hydroxides. The molar A/HEC ratio (molar ratio of alkali to HEC) used was 0.50, the diluent to HEC (D/HEC) weight ratio was 7.4, and the reaction diluent was aqueous f-butyl alcohol. Because some of the quaternary ammonium hydroxide charges would be accompanied by large additions of water, the initial water content of the diluent was adjusted so that the final diluent composition would be about 14.4% water in t-butyl alcohol. The results of these experiments are summarized in Table 2. 

Caibopol 940 Carbopol 980 Carbopol ETD Carbopol Ultrez 10 Acritamer 940 Acritamer 941 Cellosize HEC QP Cellosize HEC WP Stabileze 06 Stabileze QM... 

CELLOSIZE is Union Carbide s trademark for its hydroxyethyl cellulose (HEC) polymer. 

Trade Names Natrosol (Aqualon) Cellosize (Amerchol) Viscontran HEC (Henkel) Liporamno-san, Alcoramnosan, Idraramnosan (Vevy)... 

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