From Heyden Newport
The High Polymer Alkyd Technique* remainder of fatty acid a n d again esterifying to a low acid number. T h e viscosity of this t y p e of alkyd is higher t h a n t h a t of conventionally prepared resins and the resin colors are frequently lighter. Film property evaluation of "drying oil" fatty acid modified alkyds indicates considerable increase in dry rate and alkali resistance properties for the high polymer alkyd resins. Long oil alkyds m a d e from tall oil fatty acids dry within reasonable time. Other improvements noted so far include better flexibility, adhesion, freedom from baking discolora tion, and detergent resistance. A fractionation technique applied to these and conventional alkyds shows t h a t higher molecular weight species are made to greater degree by the stepwise esterification.
A need existed for speeding the drying rate of long oil alkyds — eorreeting the slower dry and longer taek time experienced with some fatty acids, particularly those derived from tall oil. As pari of its technical service a study of the alkyd resin as a polymeric system by the Heyden Newport Research Department resulted in a technique for achieving these properties and opened large areas of application for materials readily available at low cost. This technique is adapt able for fusion or solvent processes and particularly suitable for the manufacture of long oil alkyds from pentaerythritol and tall oil fatty acids. Heyden New port supplies pentaerythritol technical (Pentekn ) and a full line of related polyols and tall oil fatty acids.
T h e High Polymer Alkyd Technique involves t h e formation of a greater proportion of high molecular weight alkyd fractions by a stepwise esterification of the fatty acids in the alkyd formulation. T h e resin is prepared by reaction of all of the polyol a n d all of the dibasic acid with an initial quantity of fatty acid, esterifymg to a low acid number and then adding t h e
H E Y D E N CHEIVIIOa^l
•"From a paper presented by Department. Heyden Newport Manufacturers' Group of New Association. Inc.. New York. upon request.
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E W P O R T
C O F R R O R A T T I O I S I
34-2 M a d i s o n A v e n u e · N e w Y o r k 1 7 , N e w
Where tradition
meets tomorrow HEYDEN LNEWPORT]
2
C&EN
JUNE
2 4,
I957
Dr. William M. Kraft. Research Chemical Corporation, at Vehicle York Paint. Varnish and Lacquer March 13. 1957. Copies available @4 d
York
in chemical
progress
