申请人:AMERICAN CYANAMID COMPANY
公开号:EP0197170A1
公开(公告)日:1986-10-15
New and improved storage stable, one package, heat curable polyurethane adhesive compositions are disclosed which comprise
(a) a mixture of or a prepolymer adduct of:
(i) an excess of a poly aliphatic isocyanate compound of the formula:
wherein R and R' are each, independently, alkyl or substituted alkyl and X is a bridging means selected from divalent aliphatic, cycloaliphatic or aromatic groups; and
(ii) at least one monomeric or polymeric compound containing a plurality of hydroxyl groups; in admixture with
(b) a stoichiometric amount of a curing agent comprising a monomeric or polymeric compound having at least three hydroxyl groups at least one of which is a secondary hydroxyl group; and
(c) optionally, an inert filler.
The compositions are curable upon exposure to elevated temperatures of from about 100°-200°C to form high tensile strength, high adhesive strength bonds to a variety of substrates. The compositions have extended pot lives of up to six weeks and exhibit storage stability for up to six months.
本发明公开了新型和改进的贮存稳定、单包装、热固化聚氨酯粘合剂组合物,其中包括
(a) 以下物质的混合物或预聚物加合物
(i) 式中过量的多脂肪族异氰酸酯化合物:
其中 R 和 R'各自独立地为烷基或取代烷基,X 为桥接手段,选自二价脂肪族、环脂族或芳香族基团;以及
(ii) 至少一种含有多个羟基的单体或聚合化合物; 与下列物质混合
(b) 一定量的固化剂,该固化剂包含至少三个羟基(其中至少一个是仲羟基) 的单体或聚合化合物;以及
(c) 可选的惰性填料。
这些组合物在暴露于约 100°-200°C 的高温时可固化,从而与各种基材形成高拉伸强度、高粘合强度的粘合剂。该组合物的罐装寿命可延长至六周,并具有长达六个月的储存稳定性。