Film coatings based on polyalkylimine condensation polymers
OwnerDennis E. McGeeinventor
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Abstract
A coated thermoplastic film and a method of making the coated film, wherein at least one side of the film is coated with a coating composition, the coating composition comprising the reaction product of a polyalkyleneimine having at least primary nitrogens, and an epoxide compound having at least one epoxide moiety and a weight average molecular weight (Mw) of at least 200 g/mole. The weight of the dried coating compound on each side of the film is within the range from 0.005 g/m2 to 0.100 g/m2, and is especially useful in coating films to allow for printability when the film surface will be exposed to high levels of silicon that might come from, for example, release paper/films.
Claims26
A coated thermoplastic film, wherein at least one side of the coated thermoplastic film is coated with a coating composition, the coating composition comprising a reaction product of a polyalkyleneimine having one or more primary amines, an epoxide compound having at least one epoxide moiety and a weight average molecular weight (Mw) of at least 200 g/mole, and an additional component of an acetoacetoxy compound, propylene oxide, butylene oxide, or mixtures of at least two compounds selected form a group consisting of ethylene oxide, propylene oxide, or butylene oxide.
A coated thermoplastic film having a coating composition on at least one side of the coated thermoplastic film, the coating composition comprising a substituted polyalkyleneimine having one or more primary amines:
- wherein each R is independently a hydrogen or an epoxide-derived group having at least one epoxide moiety and a weight average molecular weight (Mw) of at least 200 g/mole;
- each R″ is selected from divalent C1 to C4 or C6 or C10 alkylene groups;
- and wherein n is a value within a range of from 50 to 20,000, and a reaction product with an additional component of an acetoacetoxy compound, propylene oxide, butylene oxide, or mixtures of at least two compounds selected form a group consisting of ethylene oxide, propylene oxide, or butylene oxide.
A method for making a coated film comprising:
- combining in water a polyalkyleneimine having one or more primary amines, an epoxide compound having at least one epoxide moiety and a weight average molecular weight (Mw) of at least 200 g/mole, and an additional component of an acetoacetoxy compound, propylene oxide, butylene oxide, or mixtures of at least two compounds selected form a group consisting of ethylene oxide, propylene oxide, or butylene oxide, forming a reaction product;
- diluting the reaction product in the water to a solids level within a range of from 0.1% or 20% solids;
- applying, subsequent to the diluting, the reaction product evenly to at least one surface of a thermoplastic film;
- and
- drying, subsequent to the applying, the reaction product on the at least one surface of the thermoplastic film to form a dried coating composition at a temperature within a range of from 70° C. to 140° C.
Dependencies are inferred from the claim text.