N-alkyl lactam ethers, and compositions and uses thereof
Described is a class of symmetrical and asymmetrical N-alkyl lactam ethers. One preferred ether is bis-N-ethyl pyrrolidone ether. Preferred compositions and uses of the ethers are in performance chemicals, personal care, and pharmaceutical fields, where they function a variety of roles, including as a solvent, solubilizer, freezing point depressor, diluent, extracting agent, cleaning agent, degreaser, absorbent and/or dispersion agent.
1. A compound represented by the structure:
wherein:
one of A l and A 2 is —CH 2 CH 2 — and the other is —CH 2 CH 2 CH 2 —;
said Q 1 and Q 2 are independently selected from a linear or branched C 1-6 alkyl; and
each said R is independently selected from the group consisting of hydrogen, and C 1-4 alkyl.
2. The compound according to claim 1 selected from the group consisting of:
3. A sun care composition comprising the compound of claim 1 and one or more UV absorbers selected from the group consisting of: p-aminobenzoic acid (PABA), Padimate O, ensulizole, cinoxate, benzophenone-3, enzophenone-8, homosalate, meradimate, octocrylene, 2-ethylhexyl-p-methoxycinnamate, octyl salicylate, sulisobenzone, trolamine salicylate, avobenzone, ecamsule, titanium dioxide, zinc oxide, 4-methylbenzylidene, Tinosorb M, neo heliopan AP, mexoryl XL, benzophenone-9, Uvinul T150, Uvinul A Plus, Uvasorb HEB, Parsol SLX, isopentenyl-4-methoxycinnamate, and combinations thereof.