DE1917699A1 - Lead-plastic articles - Google Patents

Abstract

Plastic (esp. PVC) and plasticizers (esp. dioctyl phthalate) contain glycerine derivs, esp. glycerine triacetate to control or suppress unwanted reactions during the gelling processes and the formation of odours in the finished article (e.g. gloves for use in X-ray work).

Description

7315 Weilheim / Teck, April 2, 1969

WILHELM KACHELE company, rubber and plastic goods factory 7315 Weilheim / Teck, Jahnstrasse 9

Lead-plastic mixture

The invention relates to a special mixture of plastics produced by chemical means, predominantly polyvinyl chloride (PVC) and plasticizers, mainly dioctyl phthalate (DOP), with lead and an addition of glycerine derivatives, e.g. glycerol triacetate (triacetin) to suppress the typical pungent smell that normally occurs Such mixtures on the finished part, especially in the case of medical articles, e.g. gloves to protect against X-rays. ,

Such gloves are known in various designs. E.g. lead foils are sewn into leather gloves. Or lead powder is rolled into rubber. This mixture is dissolved by means of organic solvents and dips out of this Solution then in the usual way gloves.

According to the invention, the lead is used as a carrier material a plastic, predominantly PVC. It must be noted here that again only those types of PVC come into consideration that prevent that sedimentation occurs in the mixture due to the high specific weight of lead. Additions of Silicate compounds (e.g. Aerosil) help prevent this such sedimentation and at the same time cause the necessary thixotropy of the mixture. As a plasticizer Dioctyl phthalate (DOP) is used.

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According to the innovation, this mixture becomes a certain one Part of a glycerol derivative, predominantly glycerol triacetate (triacetin) added.

The above-described gloves, for example, are seamlessly dipped from this mixture, which is now in the form of a paste.

In order to convert the liquid film that has emerged onto a glove shape into a solid state, a heat treatment, the so-called gelling process, required at approx. 180 ° C. During this process, in addition to the known ones, they also play a number of non-measurable or determinable reactions.

Finished parts, produced from the mixture described above without the addition of triacetin, for example, have a typical, pungent odor and cannot be used for the intended purpose.

According to the invention, only the addition of e.g. Triacetin to this PVC-plasticizer-lead mixture a control or prevention of said reactions during the gelling process and thus allows the production of odorless articles.

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009842/1757

Claims (3)

Protection claims 1.) Mixture of chemically produced plastics, predominantly polyvinyl chloride (PVC), and plasticizers, especially dioctyl phthalate (DOP), with lead, characterized in that this mixture of glycerine derivatives, predominantly glycerine triacetate (triacetin), to control or prevent undesired Reactions during the gelling process and odor formation on the finished part is added. 2.) Mixture according to claim 1, characterized in that by λ addition of a silicate compound (eg Aerosil) the tendency of the lead powder to sedimentation is prevented and the achievement of the necessary mongrel thixotropic is guaranteed. 3.) Mixture according to claim 1 and 2, characterized by the following Recipe: * Vinnol E 75: 20.0 kg DOP: 30.0 kg Triacetin: 7.0 kg Aerosil: 0.4 Lead: 100.0 009842/1757