Methoxycinnamidopropyl Laurdimonium Tosylate

The photodegradative effect of UV exposure on human hair is well documented. Continuous exposure to sun rays lightens hair color and makes human hair rough, brittle, and difficult to comb. UV rays damage the proteins of cuticles. Prolonged irradiation results in diminished tensile strength due to the breaking of disulfide bonds in keratin. IR. Beyaketal, J.Soc. Cosmet. Chem. 22,667-668(1971), E. Hotingetal, J.Soc. Cosmet. Chem. 46,85-99 (1995)1

A number of UV-absorbing compounds like derivatives of salicylic acid, benzophenones, benzotriazoles, and cinnamic acid are used in personal care products. However, all these molecules suffer from a major disadvantage of lack of substantivity.

Methoxycinnamidopropyl Laurdimonium Tosylate is an off-white colored solid with a faintly fatty odor, a quaternized UV absorber. It overcomes limitations, wherein a UV-absorbing moiety is modified to make it significantly substantive by introducing a cationic center through quaternary nitrogen for excellent adhesion to keratin.

Methoxycinnamidopropyl Laurdimonium Tosylate is a UV-B photo filter and the basic unit is the same 'p-methoxy cinnamoyl. group of octyl methoxy cinnamate. Thus, the UV-absorption properties are exactly the same as that of Octinoxate (Ethylhexyl Methoxycinnamate), but the substantivity of this ingredient is far superior in rinse-off products.

Highly substantive to hair, Methoxycinnamidopropyl Laurdimonium Tosylate is compatible not only with anionic surfactants but with all other commonly used cosmetic ingredients as well. It is suitable for both water- and oil-based formulations. It is conveniently included in transparent shampoos and transparent cleansing bars without affecting the transparency.

Methoxycinnamidopropyl Laurdimonium Tosylatet is a very stable and inert quaternary ammonium salt containing cinnamidoalkyl unit and a long alkyl chain. The quaternary ammonium center with a long alkyl chain is also responsible for a good conditioning effect. The excellent stability and inertness stem from the molecular structure that has neither reactive nor labile (easily cleavable or hydrolyzable) functional groups.