DE1282934B - Flame retardant colored molding compound - Google Patents

Description

Flame-resistant, colored molding compound. Addition for registration: B 74695 IV c / 39 b-Auslegeschrift 1 271979 the subject of patent application B74695 IVc / 39b (German Auslegeschrift 1271979) are thermoplastic molding compositions containing a Styrene polymer, an organic chlorine or bromine compound and optionally a propellant characterized in that it also contains 0.01 to 10 percent by weight one or more dyes containing heavy metals as complexes or are bound in salt form.

It has now been found that the thermoplastic molding compositions after Patent application B 74695 IV c / 39 b - (German Auslegeschrift 1 271 979) particularly Have advantageous properties if they are an iron phthalocyanine as the dye contain.

The metal-containing dyes have a synergistic effect the organic chlorine or bromine compounds, so that one can produce self-extinguishing Shaped bodies masses with a significantly lower content of chlorine or bromine compounds can use than in the absence of metal-containing dyes.

It was found that the synergistic effect of the iron phthalocyanines is particularly strong, so that smaller amounts of chlorine or bromine compounds are used required in order to be able to produce self-extinguishing moldings with the masses, as required for masses that contain other metal-containing dyes. Due to the low flame retardant content, the masses differ in the processing properties hardly depend on the styrene polymers they contain. The organic chlorine or bromine compounds should, however, at least be in such Amounts to be included in the masses that their bromine content is at least 0.05 percent by weight or their chlorine content is at least 0.7 percent by weight.

The iron phthalocyanines have a particularly good effect on mixtures from chlorine and bromine compounds.

For the preparation of the masses can be unsubstituted and substituted Iron phthalocyanines can be used. The phthalocyanines can be used as substituents z. B. contain sulfonic acid, sulfonic acid amide, carboxylic acid or carboxylic acid amide groups.

Of the styrene polymers, the chlorine resp.

Bromine compounds, propellants and other additives are suitable the same for the masses that are mentioned in the main patent application.

The self-extinguishing moldings produced from the molding compositions are tested for their fire properties in the following way: A molded foam body will be for the duration of 5 seconds in the non-luminous flame of a bunsen burner held and then removed the flame with a smooth movement. It will be the Determined time in seconds after which the shaped body after removing the flame goes out. This so-called "extinction time" is a measure of the property of self-extinguishing.

Example 1 In each case 100 parts of a styrene polymer and certain amounts of chlorine and / or bromine compounds given in the table below as well as iron phthalocyanine dissolved in 300 parts of methylene chloride. The solution will be 10 parts of pentane were added. Then the solutions are poured onto glass plates and the methylene chloride evaporated at room temperature. The pentane remains in homogeneous distribution in the mixture.

The foils obtained in this way are foamed in steam at 1000.degree and dried in vacuo at 500 ° C. for a period of 12 hours. The received Foam foils are tested for their burning behavior according to the method given above checked.

For comparison, foam films are tested that contain other metal-containing dyes as synergists. Extinction time in seconds Mixtures of Hexabromocyclo-chloroparaffin 0.5 parts Synergist parts dodecane 70% chlorine hexabromocyclododecane 1.5 parts, 7.5 parts and 2.0 parts Chlorinated paraffin Esene phthalocyanine 0.1 2.5 2.8 1.2 (unsubstituted) 0.2 2.1 1.0 1.0 0.1 14.6 20 20 Copper phthalocyanine # 0.2 3.3 20 20 0.1 6.4 20 4.4 Lead phthalocyanine # 0.2 2.3 20 2.8 - - 5.2> 30 16 Example 2 - 100 parts of polystyrene, 2 parts of chlorinated paraffin (70% chlorine), 0.5 part of hexabromocyclododecane and 0.1 part of iron phthalocyanine are mixed in a twin-screw extruder at temperatures between 180 and 2000.degree. 10 parts of methyl chloride are added to this mixture in the middle part of the extruder. The expandable mass obtained is pressed through a slot die to form a foam sheet which has a density of 35 g / l.

After four weeks of storage, samples are made according to the above Method checked. The extinguishing time of this foam sheet is less than a second.

Claims (1)

Claim: Thermoplastic molding compounds containing a styrene polymer, an organic chlorine or bromine compound and optionally a propellant, which also includes 0.01 to 10 percent by weight of one. or contain more dyes, in which heavy metals are bound as complexes or in salt form, according to patent application B 74695 IV c / 39b (German Auslegeschrift 1 271 979), characterized in that they contain an iron phthalocyanine as a dye.