| 摘要 |
A method of bonding polymer-impregnated textile, particularly belting, by assembling the portions to be bonded with an interlayer of a heat activatable, polyurethane-forming reaction mixture which is fluid at 20 DEG C and comprises a prepolymer reaction product of a polyester polyol with a polyisocyanate and a curative for the prepolymer. The reaction mixture is then heat-activated to form a polyurethane, thereby bonding the portions of polymer-impregnated textile. The polyurethane adhesive is fluid at 20 DEG C, has a reasonable pot-life i.e. is substantially stable or only slowly reactive at 20 DEG C but is heat-activatable to give a quick cure when required. |
