Patent ID: 6043322
Filing Date: 2000-03-28
Classification: C08L

Abstract:
A blend composition comprising:(A) from 1 to 99 percent by weight of a polycarbonate comprising a diol component comprising from 5 to 100 mol percent units of a diphenol or mixture of diphenols having the formula ##STR6## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are independently selected from the group consisting of hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.12 aryl, and C.sub.6 -C.sub.12 aralkyl,X represents carbon,m is an integer of from 4 to 7,and R.sub.8 and R.sub.9 are independently selected for each X and independently selected of each other from the group consisting of hydrogen and C.sub.1 -C.sub.8 alkyl;from 0 to 95 mol percent 4,4'-isopropylidenediphenol units; andfrom 0 to 10 mol percent modifying glycol units having 2 to 16 carbons, wherein the total mol percent of diol units is equal to 100 mol percent; and(B) from 1 to 99 percent by weight of a polyester comprising(a) a dicarboxylic acid component comprising from 80 to 100 mol percent dicarboxylic acid units selected from the group consisting of terephthalic acid units, isophthalic acid units, and mixtures thereof; and from 0 to 20 mol percent modifying dicarboxylic acid units having from 2 to 20 carbons, wherein the total mol percent of dicarboxylic acid units is equal to 100 mol percent; and(b) a glycol component comprising from 10 to 99 mol percent 2,2,4,4-tetramethyl-1,3-cyclobutanediol units, from 1 to 90 mol percent 1,4-cyclohexanedimethanol units, and from 0 to 10 mol percent modifying glycol units having 2 to 16 carbons, wherein the total mol percent of glycol units is equal to 100 mol percent;wherein the total units of said polyester is equal to 200 mol percent; wherein said blend is clear and the total weight percent of said polycarbonate (A) and said polyester (B) is equal to 100 weight percent.