2-ethylhexyl methyl terephthalate and bis(2-ethylhexyl) terephthalate blend plasticizers
The invention provides a plasticizer for use in plastic materials such as polyvinyl chloride. The plasticizer is a blend of di-(2-ethylhexyl) terephthalate (DOTP) and 2-ethylhexyl methyl terephthalate (MOTP). The blend of di-(2-ethylhexyl) terephthalate and 2-ethylhexyl methyl terephthalate provides a non-ortho-phthalate alternative to plasticizers such as diisononyl phthalate and also produces good fusion temperature, gelation point, plastisol viscosity, efficiency, plasticizer compatibility, and drying time performance.
1 . A composition comprising:
A) a PVC resin; and
B) a plasticizer blend comprising:
a) 20 to 25 weight % 2-ethylhexyl methyl terephthalate and 80 to 75 weight % di-(2-ethylhexyl) terephthalate wherein the total weight percent of di-(2-ethylhexyl) terephthalate and 2-ethylhexyl methyl terephthalate equals 100 weight percent; and
b) optionally one or more compounds selected from the group consisting of dioctyl phthalate, di-2-ethylhexyl phthalate, diisononyl phthalate, di-butyl terephthalate, di-isobutyl terephthalate, dioctyl terephthalate, diisodecyl phthalate, diundecyl phthalate, trioctyl trimellitate, diisononyl cyclohexyl dicarboxylate, epoxidized soya/tall oil, epoxidized linseed oil, pentaerythritol tetravalerate, dioctyl adipate, polymers that are formed by the polymerization of glycols with one or more of adipic acid, phthalic acid, and sebacic acid, triethyl citrate, acetyl triethyl citrate, tri-n-butyl citrate, acetyl tri-n-butyl citrate, benzoate esters obtained by the reaction of benzoic acid and linear/branched alkyl residues in a range of C 7 -C 12 , dibenzoate esters of C 2 -C 8 linear/branched glycols/diols.
2 . The composition of claim 1 , wherein the plasticizer is present in the amount of 5-500 parts per hundred (Phr) resin.
3 . The composition of claim 1 wherein said PVC resin has a molecular weight defined by a range of K values comprising K=approximately 60 to 84, and b) a resin particle size range from about 0.5 microns to 5 microns.
4 . The composition of claim 1 , wherein said PVC resin has up to 10% ethylene chloride content replaced with vinyl acetate or C 1 -C 3 acrylates.