Adhesive and packaging laminate using the same
AssigneesToyo Ink Mfg. Co., Ltd., Toyo-Morton, Ltd.
InventorsAkira Ikeda, Ryohei Ikeda, Keishi Fukuda, Yasuki Nakajima
Life of this patent
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Abstract
Disclosed is an adhesive and a packaging laminate produced by using the same. The adhesive contains a polyisocyanate and a partially acid-modified polyol which is a product of reacting a polyol with anhydrotrimellitic acid and an anhydrotrimellitate ester at a ratio such that the anhydrotrimellitic acid is 10 to 70% by mass and the anhydrotrimellitate ester is 90 to 30% by mass, as the sum of the anhydrotrimellitic acid and the anhydrotrimellitate ester is 100% by mass. The packaging laminate has a first and second sheet-shaped substrates and the above adhesive through which the first and second sheet-shaped substrates are laminated.
Claims10
An adhesive comprising:
- a polyisocyanate;
- and
- a partially acid-modified polyol which comprises a product of reacting a polyol with anhydrotrimellitic acid and an anhydrotrimellitate ester at a ratio such that the anhydrotrimellitic acid is 10 to 70% by mass and the anhydrotrimellitate ester is 90 to 30% by mass, as the sum of the anhydrotrimellitic acid and the anhydrotrimellitate ester is 100% by mass.
An adhesive comprising:
- a polyisocyanate;
- and
- a partially acid-modified polyol which comprises a product of reacting a polyol with anhydrotrimellitic acid and an anhydrotrimellitate ester at a ratio such that the anhydrotrimellitic acid is 10 to 70% by mass and the anhydrotrimellitate ester is 90 to 30% by mass, as the sum of the anhydrotrimellitic acid and the anhydrotrimellitate ester is 100% by mass, wherein the polyol comprises a polyesther polyurethane polyol having a number average molecular weight of 1,000 to 30,000 and being product of reacting a polyester polyol having a number average molecular weight of 200 to 20,000 with a polyisocyanate at the molecular ratio of NCO/OH being less than 1.
Dependencies are inferred from the claim text.