Chapter --Polymers of vinyl acetate or of other vinyl esters, in primary forms; other vinyl polymers in primary forms (3905)
Result ------- Poly(vinyl formal), in one of the forms mentioned in note?6(b) to this chapter, of a molecular weight of 10000 or more but not exceeding 40000 and containing by weight: - 9,5?% or more but not more than 13?% of acetyl groups evaluated as vinyl acetate (39059910)