| 摘要 |
2071816 9007539 PCTABS00001 A method of manufacturing a polysulphide polymer, in particular for use as a sealant in the construction industry and the like. A liquid polysulphide prepolymer is partially cured with an oxidizing curing agent such as calcium peroxide, by adding a controlled amount of water. As the cure reaches the end of its induction stage, before the viscosity rises substantially, the reaction is stopped by dehydrating with a desiccant. This gives a stable liquid prepolymer which can later be cured without an induction period by exposure to moisture and optionally a further curative.
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