C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 131/04 (2006.01) C08F 218/04 (2006.01)
Patent
CA 2156437
A process for the preparation of emulsion polymers comprising 70 to 95% by weight of a vinyl ester and 5 to 30% by weight ethylene, the polymerization being carried out in the presence of 2 to 8% by weight of a protective colloid consisting of a blend of 1 to 3 percent by weight of 80% hydrolyzed polyvinyl alcohol, 0 to 2 percent by weight of 88% hydrolyzed polyvinyl alcohol and 1 to 3 percent by weight of 96% hydrolyzed polyvinyl alcohol, the blend having an average level of hydrolysis of 85 to 88%.
Méthode pour préparer des polymères en émulsion, renfermant 70 à 95 % en poids d'un ester vinylique et 5 à 30 % en poids d'éthylène; la polymérisation est effectuée en présence de 2 à 8% en poids d'un colloïde protecteur constitué d'un mélange de 1 à 3 % en poids d'alcool polyvinylique hydrolysé à 80 %, de 0 à 2 % en poids d'alcool polyvinylique hydrolysé à 88 %, et de 1 à 3 % en poids d'alcool polyvinylique hydrolysé à 96%, le mélange possédant une valeur moyenne d'hydrolyse de 85 à 88 %.
Mudge Paul R.
Rosenski Josephine M.
Walker James L.
Ablestik Laboratories
Borden Ladner Gervais Llp
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