Proses Pembuatan Serta Analisa Benton-38 Dari Bentonit Sebagai Bahan Aditif Pada Cat

Abstract

The production of bentone for paint additive from Cabentonite was carried out by ion exchange process. The process has two steps, i.e. Ca++ ion in Ca-bentonite is exchanged by Na+ ion in saturated solution of NaCl to produce Na-bentonite. Then, Na+ ion in Na-bentonite is exchanged into {(R1)2N(R2)2 + by using alkyl quaternary ammonium salt to produce bentone. lnterms of swelling characteristic the ion exchange using 140 ml of saturated solution of NaCl for 100 g Ca-bentonite produced best product with a swelling characteristic of 15.56. The amount of dimethyl distearyl ammonium salt (DAM) used for production of bentone-38 was 60 g/100 g bentonite. This is based on the ion exchange capacity of bentone-38, i.e. 69 meq for 100 g bentonite. Swelling characteristics of the above bentone-TS-R (reference) and bentone-38-H (experiment) were 24.5 and 39 in Spirit Mineral Terplne (SMT), 55 and 54 in SMT + ethanol (17:3 v/v), and the viscosity of bentone-38-R, and bentone-38-H are 7.2 cps and 6.5 cps respectively