Document 0qpyzbEYZ0VEmO82Z7penXLEx

United States Patent m Morrison, Jr. Ui] 4,399,237 [451 Aug. 16, 1983 [54] VESICULATED POLYMER GRANULES CONTAINING TI02 [75] Inventor: William H. Morrison, Jr,, Wilmington, Del. [73] Assignee: E. I. Du Pont de Nemours & Co., Wilmington, Del. [21] Appt.No.: 441,756 [22] Filed: Nov. 15,1982 [51] IntCU.............................. C08J 9/26; C08J 9/28 [52] U.S. Cl............................................ 521/62; 521/56; 521/60; 521/64; 521/107; 521/138; 523/501; 523/504; 523/505 [58] Field of Search ................... 521/62, 64, 107, 138, 521/56 [56] References Cited U.S. PATENT DOCUMENTS 3,923,704 12/1975 Geinning et al....................... 521/138 Primary Examiner--Morton Foelak [57] ABSTRACT Vesiculated polymer granules having high refractive indices can be made from an aqueous slurry of particu late Ti02 if the slurry contains a phosphate ester. 8 Claims, No Drawings N 30860