using DOP in semi-rigidplastisols?
With Eastman's new vinyl plasticizer... Texanol Isobutyrate you can reduce amount of plastisol used per charge up to 31% (without decreasing wall stiffness or increasing dispersion viscosity!) The more we work with Texanol Isobutyrate, the more unique we find its properties. For example, in plastisol systems this new Eastman plasticizer is remarkable with respect to its ability to form low viscosity dispersions. On the other hand, its plasticizing efficiency in the cured film is comparable to that of DOP. It is possible, therefore, to duplicate the pouring and handling characteristics of a plastisol formulation containing 50 phr DOP, for example, with one containing only 31 phr Texanol Isobutyrate. Because of the lesser amount of plasticizer used, however, a much stiffer film results. This can mean considerable savings to producers of plastisol molded objects, the rigidity of which depends primarily upon wall thickness. For example, the rigidity of a cured film only 69 mils thick containing 31 phr Texanol Isobutyrate is equal in stiffness to a 100 mil film containing 50 phr DOP (see Figure 2). The dispersion viscosity of both, however, is the same—4000 cps. Other relative wall thicknesses of films of equal rigidity containing DOP; Texanol Isobutyrate; and a 1:1 blend of Texanol Isobutyrate and DOP can be determined from Figure 1. Simply read along the bottom to find the wall thickness of an article currently being molded using a DOP formulation. Read up and then left for the thickness needed to give the same stiffness if Texanol Isobutyrate or a 1:1 blend of Texanol Isobutyrate and DOP were used. All data are based on plastisols containing Geon 121: Geon 202, 55:45; Ba-Cd-Zn stabilizer 3 phr; epoxidized soybean oil 3 phr; Surf ex MM 10 phr; plasticizer as noted. All viscosities are Brookfield, expressed as cps at 23°C., ivith #4 spindle at 6 RPM.
Contact your Eastman representative to find out how Texanol Isobutyrate may best be used in your plastisol formulations, or write to Chemicals Division, EASTMAN C H E M I C A L P R O D U C T S , I N C . , subsidiary of Eastman Kodak Company, KINGSPORT, TENNESSEE.
Eastman CHEMICAL PRODUCTS, INC. CHEMICALS DIVISION, KINGSPORT, TENN. S u b s i d i a r y of Eastman Kodak Company SALES OFFICES: Eastman Chemical Products, Inc., Kingsport, Tennessee; Atlanta; Boston; Buffalo; Chicago; Cincinnati; Cleveland; Dallas; Detroit; Greensboro, North Carolina; Houston; New York City; Philadelphia; St. Louis. Western Sales Representative: Wilson & Geo. M e y e r & Company, San Francisco; Los Angeles; Salt Lake City; Seattle.
