Chapter 3 109 VP/DMAPA Acrylate Copolymer PVP/Dimethylaminoethylmethacrylate Polycarbamyl Polyglycol Ester PVP/Dimethiconylacrylate/Polycarbamyl Polyglycol Ester Quaternium-80 (Diquaternary polydimethylsiloxane) Poly(vinylpyrrolidone--dimethylamidopropylmethacrylamide) VP/Vinyl Caprolactam/DMAPA Acrylates Copolymer Amodimethicone PEG-7 Amodimethicone Trimethylsiloxyamodimethicone Ionenes Poly(adipic acid-dimethylaminohydroxypropyldiethylenetriamine) poly (adipic acid-epoxypropyldiethylenetriamine) (Delsette 101) Silicone Quaternium-8 Silicone Quaternium-12 Polyampholytes have been commercially available as conditioning polymers for a considerable time. A prominent example is Polyquaternium-39, which is a copolymer of diallyldimethylammonium chloride, acrylamide, and acrylic acid. When this is polymerized in a single batch process, the mismatch in reactivity ratios between these monomers results in a lack of compositional uniformity. An improved version of this type of terpolymer of diallyldimethylammonium chloride, acrylamide, and acrylic acid has been made by a monomer feed method for better control of molecular weight and composition.95 Copolymers comprising a diallylamine (typically diallyldimethyl ammonium chloride) and vinyllactam monomers (typically polyvinylpyrrolidone) are useful film-formers that confer conditioning properties such as good wet- and dry combability feel, volume, and handle ability.96 Table 1. Examples of Cationic Conditioning Polymers (Cont.)