Simply put, intellectual property rights are intangible and property rights are tangible. Invisible things always have to be shaped into carriers to be recognized.
Intellectual property rights include trademarks, patents, copyrights and trade secrets.
Take the trademark as an example, it is not something in the general sense, but it embodies people's intellectual activities. It is precisely because of intellectual activities that its value exceeds that in the general sense. Therefore, it is regulated by intellectual property law.
Intellectual property is still intellectual property when mortgaged, but it needs to be evaluated, but its nature will not change.