Patent · US Expired

Process for recycling hardened polysulphide and/or polymercaptan adhesives and sealants

US6117971A · kind A · utility

0Cited by

2References

11Claims

0Family size

Assignee

Henkel-Teroson GmbH · DE

Inventors

Stefan Grimm · Wintersheim, DE
Karl-Heinz Pressel · Sonneberg, DE
Manfred Proebster · Schallstadt, DE

Key dates

Filing date	Feb 5, 1999
Grant date	Sep 12, 2000
Priority date	—
Expiry date	Feb 5, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/62
WIPO fieldOther special machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.