Process for recycling hardened polysulphide and/or polymercaptan adhesives and sealants
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United States of America Patent
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Sep 12, 2000
Grant Date -
N/A
app pub date -
Feb 5, 1999
filing date -
Jun 14, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a process for recycling cured or partly cured polysulfide and/or polymercaptan compositions. Recycling is carried out in a non-volatile liquid with addition of a depolymerizing agent, preferably a sulfur-containing vulcanization accelerator known from rubber technology. The depolymerisate may be added to the curing component of two-component polysulfide and/or polymercaptan adhesives/sealants or coating materials in large quantities without any significant effect on its stability in storage or curing characteristics.
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