It's just like any report you did in college chem, without the results (Intro, Methods sections). You need develop your intro more- have a very strong development of the problem you are solving and a strong arguement as to why your solution is best. Compare your solution to those found in the literature and show how yours both builds off of others (i.e., is supported by pprevious research,) yet improves upon them in X, Y, and Z, ways.
Have a detailed plan as to how you will attack this problem with your solution. That is, what experiments will you conduct to prove what you said in the intro? Prove that these experiments build logically and lead to a result.
You also need to have a section on how you will disperse this info. Do you write a closing report to the funding agency? Poster or presentation at a conference? If you get money from this proposal, then you need to have a preliminary budget too.