Mitsui Takeda Chemicals, Inc.

Mitsui Takada Chemicals Inc.

Taiji Morimoto

Akihiro Imai

Sachio Igarashi

Kazuaki Imamura

The solvent-free two-component adhesive composition of the present invention is prepared by a polyol component (A) and a polyisocyanate component (B), wherein the composition comprises at least one polyol component having crystallinity and selected from the group consisting of a polyester polyol, a polyether polyol, a polycarbonate polyol and a polyurethane polyol in an amount of 3 to 50% by weight relative to the total weight of the components (A) and (B). The adhesive composition has the initial viscosity of about 100 to 1,500 mPa&middot;s (in particular, 100 to 1,000 mPa&middot;s) at 70&deg; C. immediately after the components (A) and (B) are mixed together, and the increasing ratio of viscosity after the composition is stood at 70&deg; C. for 10 minutes to the initial viscosity of 120% or less. According to the present invention, a composite laminated film having the good external appearance can be produced simply and effectively.

Solvent-free two-component curable adhesive composition

The solvent-free two-component adhesive composition of the present invention comprises a polyol component (A) and a polyisocyanate component (B), and the viscosity of the mixture at 80&deg; C. immediately after the point of time the components (A) and (B) are mixed together is 900 mPa&middot;s or higher. The component (A) may be a polyol having a number average molecular weight of 800 or larger, or a mixture thereof, and the viscosity of the component (B) at 25&deg; C. may be 20,000 mPa&middot;s or higher. The composition may be used for laminating metal foil of 5 to 15 m thickness with a plastic film. By using the composition of the present invention, the occurrence of blocking due to the seepage of the adhesive from metal foil is prevented. The present invention includes a process of lamination using the same.

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Osaka, Japan

Taiji Morimoto