[Si:1]([O-:5])([O-:4])([O-:3])[O-:2].[Na+:6].[Na+].[Na+].[Na+].[CH2:10]1[O:13][CH:11]1[CH3:12].C(O)(=O)CCCCC(O)=O.C([O-])(=O)CCCCCCCCCCCCCCCCC.[Na+].C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1.[CH:63]([Cl:65])=[CH2:64]>>[Si:1]([O-:5])([O-:4])([O-:3])[O-:2].[Na+:6].[Na+:6].[Na+:6].[Na+:6].[CH:63]([Cl:65])=[CH2:64].[CH2:10]1[O:13][CH:11]1[CH3:12]About 50 parts by weight of an aqueous sodium silicate solution containing about 15% Na2O and 25% SiO2 by weight, 10 parts by weight of propylene oxide, 2 parts by weight of adipic acid, 0.2 parts by weight of sodium stearate and 0.1 part by weight of benzoyl peroxide are mixed then added to an autoclave and a temperature of about 50° C. is maintained at a pressure between 7.0 and 7.1 kg per cm2. Vinyl chloride monomer is slowly added while agitating over a period of 7 to 10 hours until the emulsion contains about 30% vinyl chloride polymerized with the sodium silicate and propylene oxide thereby producing an emulsion of poly(sodium silicate-vinyl chloride-propylene oxide) copolymer.
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