A polymer composition including polymer particles comprising a first polymer and a second polymer is disclosed. The first polymer optionally has a crosslinked core and has a glass transition temperature in the range of -30.degree. C. to 100.degree. C. The second polymer comprising select crosslinking groups has a glass transition temperature in the range of -10.degree. C. to less than 18.degree. C. A coating composition comprising the polymer composition is provided. The polymer composition has good low temperature film formation and provides a film with an acceptable level of hardness.