Tacky low temperature curing polyisocyanate adhesive composition
Abstract
Abstract A TACKY ADHESIVE COMPOSITION WHICH CURES AT ROOM TEMPERATURE TO STRONG, ADHESIVE, AND FLEXIBLE STATE IS OBTAINED WHEN (1) A NORMALLY SOLID POLYOL-ARYLENE-DIISOCYANATE PREPOLYMER CARRYING AT LEAST THREE ISOCYANATO SUBSTITUENTS; (2) A NORMALLY SOLID LINEAR PREPOLYMER COMPOSED OF POLYESTER AND POLYURETHANE LINKAGES AND CARRYING TWO TERMINAL ALCOHOLIC-OH SUBSTITUENTS; (3) A SATURATED POLYOL HAVING A MOLECULAR WEIGHT IN EXCESS OF 2,000 AND HAVING AN AVERAGE CONTENT OF AT LEAST THREE ALCOHOLIC-OH SUBSTIUENTS PER MOLECULE; AND (4) A DIFUNCTIONAL MONOMERIC CURING AGENT FOR THE COMPONENTS OF SAID COMPOSITON WHICH CARRY ISOCYANATO SUBSTITUENTS, THE FUNCTIONAL GROUPS OF SAID AGENT BEING SEPARATED BY AT LEAST 4 CARBON ATOMS; ARE MIXED WHEN APPROXIMATLELY EQUIVALENT REACTIVE RATIO.
Inventors
- 👤 Ning Wang S Shan
- 👤 D Rossler
Bibliographic Details
Claims Analysis
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