was slurried with 3000 ml water a blend of 12 75 gms pvc homopolymer latex dry weight geon 151 and 2 25 gms vinylidene chloride copolymer latex dry weight geon 660x4 was then added with agitation mixing was continued until the aqueous phase became clear about 3 minutes the resulting mix was formed into a sheet as in the earlier examples drain time 22 5 seconds the method disclosed in examples 1 and 4 were repeated for various pvc secondary binder to illustrate further the invention the results are as follows ______________________________________method i______________________________________ pvc copolymer sup 1 secondary binder sup 2 ratio added drain time canadian freenessexample separately seconds ml ______________________________________comparison 100 0 225 805 90 10 55 2806 85 15 40 3507 80 20 24 4801 75 25 20 550method iii______________________________________ pvc copolymer sup 3 secondary binder sup 4 ratio blended drain time canadian freenessexample before addition seconds ml ______________________________________comparison 100 0 129 1008 90 10 35 3309 85 15 22 5 47010 80 20 15 5504 75 25 10 650______________________________________ drain times measured in a standard williams 12 34 u00d7 12 34 sheet mold sup 1 geon 460x6 b f goodrich vinyl chloride vinyl acetate copolymer tg 73 u00b0 c differential scanning calorimetry dsc mn 29 800 mw 104 000 mz 290 000 gel permeation chromotography gpc sup 2 geon 660x1 b f goodrich vinylidene chloride acrylate copolymer tg 7 u00b0 c dsc mn 30 700 mw 123 000 mz 385 000 gpc sup 3 geon 151 b f goodrich tg 85 u00b0 c dsc mn 24 600 mw 125 000 mz 347 000 gpc sup 4 geon 660x4 b.