MACROMOLECULAR ADHESIVE AND PREPARATION THEREOF
PURPOSE:To prepare a macromolecular adhesive excellent in initial adhesion, normal bonding strength and water resistant adhesive power, by crushing agglomerate of synthetic resin emulsion in the presence of phosphoric acid and adding it to a solution of a water soluble macromolecular adhesive. CONST...
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Zusammenfassung: | PURPOSE:To prepare a macromolecular adhesive excellent in initial adhesion, normal bonding strength and water resistant adhesive power, by crushing agglomerate of synthetic resin emulsion in the presence of phosphoric acid and adding it to a solution of a water soluble macromolecular adhesive. CONSTITUTION:A polyvalent metal salt is added to a synthetic resin emulsion (e.g. polyvinyl acetate emulsion) for agglomeration of resin, followed by dehydration to obtain an agglomerate having a water content of 40-80%. After addition of phosphoric acid, the agglomerate is crushed and is added to a solution of a water-soluble macromolecular adhesive (e.g. PVA) for milling and mixing to cause reemulsification. |
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