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US 2018/0002582 A1Published application
Adhesive and adhesive tape
AssigneesToyo Ink Sc Holdings Co., Ltd., Toyochem Co., Ltd.
InventorsShingo TANABE, Katsunori FUKUTA, Chiyo ISHIZU, Shuhei SAITO
Life of this patent
Estimating the term…
Abstract
An adhesive includes: a urethane prepolymer (A) obtained by reacting a polyol (a) with a polyisocyanate (b) under such conditions that the molar ratio of NCO/OH is 0.5-0.9 and having a molecular-weight dispersion degree [(weight-average molecular weight (Mw))/(number-average molecular weight (Mn)); hereinafter referred to also as Mw/Mn] of 4-12; a polyfunctional polyol (B), and an isocyanate curing agent (C).
Claims13
An adhesive, comprising:
- a urethane prepolymer (A) which is a polymer having a molecular-weight dispersion degree of 4 to 12 obtained by reacting a hydroxyl group of a polyol (a) with an isocyanate group of a polyisocyanate (b) where a molar ratio of NCO/OH is 0.5 to 0.9;
- a polyfunctional polyol (B);
- and
- an isocyanate curing agent (C).
1 more element
Dependencies are inferred from the claim text.