DE402959C - Process for making hygienic sponge rubber toys - Google Patents

Description

Process for making hygienic sponge rubber toys. at the production of toys from pieces of Schwamingunis that turn into animals, figures, Jumping jacks and the like are glued together in one color or in many colors, hike the individual parts and finally the finished pieces during packaging through numerous countries. The toys take in stores as a result of their numerous open pores afterwards lightly dust up before they enter the Hänsle of the playful children. For hygienic reasons it was therefore desirable to incorporate effective germicides into the sponge rubber toys.

It has been found that the customary method 1 for production from sponge rubber (see H e r b e r t I i n d e -m a n n, Gummi-Zeitung, year 26, Issue 16, pages 6oo-6o2) add up to percent crude naphthalene to the rubber mixture, afterwards the common blowing agents were used and then in the common ones Way can vulcanize.

As is well known, crude naphthalene contains not only naphthalene but also important ones Amounts of creosote oil, which is a very effective germicidal agent. This salary Creosote oil mitigates the otherwise quite unpleasant and the processing on the open Kautschukmi5ch @ valzen the almost exclusive odor of naphthalene is so extraordinary, that in contrast to the processing of pure naphthalene, when mixing in crude naphthalene can work in hot rubber without protective masks. The one at about 60> 2 ° C the low melting point of the crude naphthalene makes the rubber soft at the moment, so that the mixing in of the filling agent and dyes only takes about half the wiping time required as a previously used sponge mixture. The saving in strength and wages are therefore considerable.

It was to be feared that such a product would be rich in crude naphthalene, to a certain extent very fatty mixture that would absorb the common blowing agents badly. Surprisingly but the new sponge rubber mixture absorbed the blowing agents very well.

It was also feared that such a low-melting rubber compound when Vuikanisierung in a water bath completely dissolves and as a result of the well-known regenerating Effect of the 'naphthalene the vulcanization would be inhibited. Surprisingly there was neither a deliquescence of the gum bread in the vulcanization nor an inhibition .the vulcanization: on the contrary, the sponge rubber bread noticeably vulcanized faster and became particularly firm. Comparative experiments also showed results here superior effect of raw naphthalene over pure naphthalene.

By boiling and drying the sponge rubber pieces in the usual way, the new sponge pieces lose practically all of the foul-smelling naphthalene in 2.4 hours, but because of their content of magnesia, lime, zinc oxide and similar basic substances, they retain sufficient amounts of the phenols contained in the crude naphthalene Creosote oil back in order to be able to exert a germicidal effect for a long time to come. At the same time, the sponges produced using the new process retain a noticeably livelier color than the previous sponges. Furthermore, in Geer's test for oxygen uptake at 71 ° C. in the drying cabinet, they gain more slowly in weight, so they hold up better in storage. Example.

A Guinmu mixture, they want in the Gummi-Zeitung, 26th year, Issue 16, page 600 is described, an addition of 1 percent crude naphthalene made and then with the addition of the there Le'schrittenev: Blähinitteis the preparation and vulcanization carried out in the known manner. The finished sponge pieces are then boiled and dried.

Claims (1)

PATr.NT-ANSPRUCIH: Process for the production of hy gienischer Schw.amrng immispieiwaren, characterized in that the rubber mixture before vulcanization up to 10 percent raw aplithaiin is added. Supplementary sheet to the patent specification 402 939 Class 39 b Group 1. The patent seeker is named as the inventor viorden: Dr Werner Esch in Harnburg.