Prevention of plasticizer migration from PVC products

Details Prevention of plasticizer migration from PVC products Prevention of plasticizer migration from PVC products

1987-03-25

1989-02-21

Schofer, Joseph L.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273935, 428518, 5253315, 525352, C08F 834

Patent

active

048063932

ABSTRACT:
To plasticized polyvinyl chloride (PVC) there is applied a layer of PVC modified by the introduction of functional groups which can be crosslinked, preferably under the influence of heat. Such crosslinking provides a thin coating which prevents leakage of plasticizer and additives from the plasticized PVC substrate when it is contacted with solvents. Preferred modification of the PVC is by means of thiocarbamate moieties replacing some of the chlorine in the PVC from which the surface layer is produced.

REFERENCES:
patent: 4128510 (1978-12-01), Richwine
patent: 4288576 (1981-09-01), Richwine

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