Patent ID: 7473757

Claim:
A hyperbranched polymer of at least one anhydrosugar-related compound selected from a dianhydrosugar alcohol represented by the following general formula [1]: (wherein R is hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms, provided that nR's are equal to or different from one another and at least one R of nR's is hydrogen atom, and symbol n is an integer from 1 to 10) and an anhydrosugar alcohol represented by the following general formula [2]: (wherein R 1 is hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms; R 2 is hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms; R 3 is hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms; and R 4 is hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms; provided that R 1 , mR 2 's, pR 3 's and R 4 are equal to or different from one another and at least one of R 2 or R 3 of said mR 2 's and pR 3 's is hydrogen atom, respectively; and symbol m is an integer from 1 to 20 and symbol p is an integer from 1 to 20, provided that symbol m+p is an integer from 2 to 20.