Laminating adhesives hardenable by radiation
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsAchim Huebener, Guenter Henke, Michael Drobnik
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Abstract
A method of forming a film laminate uses an adhesive containing at least three components A, B and C. The method includes providing a radiation curable adhesive that contains a) a compound bearing at least one epoxy group, b) a compound with at least three OH groups and a molecular weight below 400 and c) a photoinitiator which initiates a polymerization of components a) and b) after exposure to light with a wavelength of 100 to 600 nm.
Claims28
A method of forming a film laminate comprising:
- i) providing an adhesive composition between a first film and a second film, the adhesive composition comprising components A, B, C, and E;
- a) component A comprising a compound bearing at least one epoxy group,
- b) component B comprising at least one compound with at least three OH groups and a molecular weight below about 400, the compound selected from the group consisting of glycerol, trimethylol ethane, trimethylol propane, pentaerythritol, sugar alcohols, polycaprolactone, oligomeric ethers of glycerol, trimethylol ethane, trimethylol propane, pentaerythritol and sugar alcohols, and reaction products of polyhydric alcohols and alkylene oxides,
- c) component C comprising a photoinitiator which initiates a polymerization of components A and B after exposure to light with a wavelength of 100 to 600 nm;
- and,
- e) component E being a compound or a mixture of two or more compounds containing a cationically polymerizable functional group that is not an epoxy group and,
- ii) exposing the adhesive composition to light.
An adhesive composition comprising components A, B, C and E:
- a) component A comprising a compound bearing at least one epoxy group;
- b) component B comprising at least one compound with at least three OH groups and a molecular weight below about 400, the compound selected from the group consisting of glycerol, trimethylol ethane, trimethylol propane, pentaerythritol, sugar alcohols, polycaprolactone, oligomeric ethers of glycerol, trimethylol ethane, trimethylol propane, pentaerythritol and sugar alcohols, and reaction products of polyhydric alcohols and alkylene oxides;
- and
- c) component C comprising a photoinitiator which initiates a polymerization of components A and B after exposure to light with a wavelength of 100 to 600 nm;
- and
- e) component E being a compound or a mixture of two or more compounds containing a cationically polymerizable functional group that is not an epoxy group.
An adhesive composition comprising components A, B, C and E, component A comprising about 5% to about 40% by weight of the adhesive as a whole a compound containing at least one epoxy group, component B comprising about 1% to about 10% by weight of the adhesive as a whole at least one compound with at least three OH groups and a molecular weight below about 400, the compound selected from the group consisting of glycerol, trimethylol ethane, trimethylol propane, pentaerythritol, sugar alcohols, polycaprolactone, oligomeric ethers of glycerol, trimethylol ethane, trimethylol propane, pentaerythritol and sugar alcohols, and reaction products of polyhydric alcohols and alkylene oxides, component C comprising at least one photoinitiator capable of initiating the polymerization of the epoxy groups by exposure to light and component E comprising about 0.1% to about 10% by weight of the adhesive as a whole a compound or a mixture of two or more compounds containing a cationically polymerizable functional group that is not an epoxy group.
Dependencies are inferred from the claim text.