Production of highly concentrated adhesive dispersions and...

C - Chemistry – Metallurgy – 09 – J

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C09J 133/06 (2006.01) C08F 220/18 (2006.01)

Patent

CA 2263948

Aqueous solutions of adhesive materials which can be easily filtered and deodorized, particularly for self-adhesive labels, with a solids content of over 65 % can be produced with good reproducibility of characteristics through copolymerization of esters of acrylic and/or methacrylic acid in the presence of less than 50 ppm inhibitor and preferably in the presence of 0.01 to 5 % by weight of reducing agents, according to a special emulsion process. The highly concentrated and steam- deodorized adhesive material dispersion is free of coagulants and specks.

L'invention concerne un procédé de préparation de dispersions aqueuse d'adhésifs, pouvant être facilement filtrées et désodorisées, notamment pour étiquettes autocollantes, présentant une teneur en matières solides supérieure à 65 %. Ces dispersions peuvent être produites selon un procédé d'émulsion spécial, avec des propriétés facilement reproductibles, par copolymérisation d'esters de l'acide acrylique et/ou méthacrylique en présence de moins de 50 ppm d'inhibiteur et de préférence en présence de 0,01 à 5 % en poids d'agent réducteur. La dispersion d'adhésif à haute concentration, désodorisée ensuite à la vapeur d'eau, est exempte de coagulats et de grains.

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