You may find post #37 in this thread of interest Tangled mess! Please help!
Here's an old article by Curl Chemist on polyquats All About Another Hard-to-Pronounce Compound
The fact that they use the term "film forming" about 4 and 10 tells me why I have issues. Curl Chemist has responded to me in some threads that they don't build up. However, I know that I have issues with them, so avoid them.
I really can't tell you about polyquaternium 60. I did a google search on both nc.com and the rest of the internet--didn't really see anything.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me