申请人:Finetex, Inc.
公开号:US04791097A1
公开(公告)日:1988-12-13
A method is provided for modifying foam in an aqueous surfactant composition. The method comprises admixing with the aqueous surfactant composition a foam modifying amount of a composition of the formula: ##STR1## wherein R is: (a) a branched or linear alkyl of 20 to 28 carbon atoms; or (b) ##STR2## wherein n is 9-16 and R.sub.1 is a branched or linear alkyl of 3 to 22 carbon atoms. Certain of these benzoate esters are novel, in particular: ##STR3## wherein R.sub.2 and R.sub.3 are each, independently, an alkyl of 4 to 16 carbon atoms, and the total number of carbon atoms in R.sub.2 and R.sub.3 is at least 12 carbon atoms. Preferably, R.sub.2 and R.sub.3 are each C.sub.8 H.sub.17, i.e. octyldodecyl benzoate ester. Additional novel benzoate esters used as foam enhancers have the formula: ##STR4## wherein n is 12 to 16 and R.sub.1 is a branched or linear alkyl of 3 to 22 carbon atoms. Particularly preferred esters are when n is 14, R.sub.1 is C.sub.18 H.sub.37 and R.sub.1 is C.sub.4 H.sub.9. Also, additionally, preferred esters are where n is 9 and R.sub.1 is C.sub.16 H.sub.33.
提供了一种用于改性水性表面活性剂组合物中泡沫的方法。该方法包括将式子组成的化合物的改性泡沫量与水性表面活性剂组合物混合:
其中R为:(a)20至28个碳原子的支链或线性烷基;或(b)其中n为9-16,R1为3至22个碳原子的支链或线性烷基。其中某些苯甲酸酯是新颖的,特别是:
其中R2和R3各自独立地为4至16个碳原子的烷基,R2和R3中的碳原子总数至少为12个碳原子。优选的是,R2和R3各自为C8H17,即辛基十二烷基苯甲酸酯。用作泡沫增强剂的其他新颖苯甲酸酯具有以下式子:
其中n为12至16,R1为3至22个碳原子的支链或线性烷基。特别优选的酯是当n为14时,R1为C18H37,R1为C4H9。此外,优选的酯是n为9且R1为C16H33。