SOUND PROOFING PANEL AND PROCEDURE FOR YOUR PRODUCTION

The invention concerns sound proofing panels, which consist of an india rubber basic matrix and soft rubber flour. Spec. Weight is stopped during this rubber mixture with a propellant to for instance l g/cm3. Sound-absorbing plates with high spec. Weight, so-called Sehwermatten with imbedding material coated, are well-known. The imbedding material is soft reading tables, porous layer with spec. Weight from 0,02 to 0.6 g/cm3. As imbedding material PU-foam or PU-flakes is used. This imbedding material has small strengtheningnesses, particularly under load deforms it strongly and one can it not, e.g. as Scha! ldämmplatte, with high loads use. Sehaildämmplatte, which are as described made of the heavy mats and imbedding material, have e.g. as Unterschottermatten also only a limited range of application. The invention sat down to the goal of creating a rubber mixture the high mechanical properties, good flexible characteristics and at the same time a high sound absorption exhibits, which can be used as Sehalldämmplatte. This is reached according to invention by that the sound proofing panel from an india rubber - basic matrix and from soft rubber flour, those with a propellant on spec. Weight from 0,8 to 1.1 is adjusted, exists. The mixture consists of I00 Cew. - Parts of india rubber basic matrix and 150 to 400 Gew. - Parts soft rubber flour. As india rubber basic matrix Chloroprenmischung, with lead oxide interlaced, which is intended against hydrolysis for high z0 stability, can be used. Further the india rubber basic matrix, with which no high requirements are set to resistance to aging, can consist made of Indian rubber, isoprene rubber, Butadienkautsehuk, styrene butadiene india rubber or of a mixture of these kinds of india rubber. The basic matrix can consist also of a mixture of tire rain advice and isoprene rubber, z5 Indian rubber, butadiene india rubber or styrene butadiene india rubber. Eiehgummimehl, e.g. made of scrap tires, has a grain size from 0,1 to 1.0 mm. The sound proofing panels can be provided for special employment with spraying, or casting PU, PVC, polyvinylidene fluoride and similar surface layers. The sound proofing panels after this invention can be used as oscillation damping plates, as Unterschottermatten of railway tracks, roads etc. The Sehalldämmplatten can be used also as imbedding material for Sehwermatten. Further one can use the sound proofing panels as rail documents between rails and thresholds. This invention is also a contribution for environmental protection. Waste products become, as uses old motor-car tires, in large quantities with the production of these sound proofing panels. in the following the invention is more near described on the basis of examples. Example I: 100 Gew. - Parts of 1 thread - parts of Gew. - Parts of 11 Gew. - Parts of 13 thread - parts of 2 Gew. - Parts of 225 Gew. - Parts of 2 Gew. - Parts of 4--6 Gew. - Parts chloroprene rubber stearic acid Cumaronharz Faktis aromatic softener oil Biphenyl amine derivative soft rubber flour, partial marriage size 0.1 to 1.0 mm 2-Merk ap toimidazolin p-Toluolsulfohydrazid Gew. - One processes parts lead oxide the mixture as following; First the india rubber basic matrix, i.e. chloroprene rubber, stearic acid, ¢umaronharz, are before-mixed afterwards Faktis, diphenylamine derivative without softeners in the kneading machine and the soft rubber flour with the aromatic softener oil is trained. In the end lead oxide becomes s as vulcanizing agent, p-Toluolsulfohydrazid as driving center! and Merkaptoimidazo] in as accelerators added. The mixture was vulcanized to 10 mm plates with 143°C, 10 min. Example 2: 150 Gew. - Parts Indian rubber ML 4/100 = 24-26 thread - parts styrene butadiene india rubber 1.5 fiew. - Parts of stearic acid 2.5 Gew. - Parts sulfur thread - parts zinc oxide 1.5 Gew. - Parts N-Isopropyl-N-PHENYL-P-phenylendiamin 160 thread - parts of Weiehgummimehl particle size 0.1 to 1.0 mm 1.2 Gew. - Parts of Benzothi azyl-2-cyclo-hexy [sulfenamid 0.6 Gew. - Parts of Diphenylguanidin 3-6 thread - parts of p-Toluolsulfohydraaid the india rubber basic matrix, i.e. Indian rubber and styrene le tadien Kautsch uk with sulfur, zinc oxide, stearic acid is merged and N-Isopropyl-N-PHENYL-P-phenylendiamin as Alterungssehutzmitte and trained then the Neichgummimehl. In the end the p-Toluolsulfohydrazid as propellants and the vulcanizing accelerators i.e. Diphenylguanidin and Benzothiazyl-2-cyclo-hexylsulfenamid are added. The mixture was vulcanized to 10 mm plates, with 143°C, 10 min. Example 3: i00 thread - Divide styrene butadiene india rubber 2 Gew. - Parts of stearic acid 2.5 Gew. - Parts sulfur 7 Gew. - Parts zinc oxide 2 Gew. - Parts of N-I sopropyl N PHENYL P phenylendi amine 36 Gew. - Parts aromatic Weichmacher51 270 Gew. - Parts soft rubber flour, particle size 0.1 to 1.0 mm 1.6 Gew. - Parts of Benzothiazyl-2-cyclo-hexylsulfenamid 0.8 Gew. - Parts of Diphenylguanidin 3-6 Gew. - One processes parts of p-Toluolsulfohydrazid this rubber mixture as in the example 2. Example 4: Thread - parts of Styrolbut schuk Gew adienkaut. - Parts tire rain advice with approximately 50% content of vulcanizable india rubber IO 2 3 i0 3,370 1 5-6 thread - parts of stearic acid thread - parts sulfur thread - parts zinc oxide thread - parts N-Isopropyl-N-PHENYLP-pheny [endiamin Gew. - Parts aromatic softener oil Gew. - Parts soft rubber flour, particle size 0.1 to 1.0 mm Gew. - Parts of Diphenylguanidin Gew. - One processes parts of p-Toluolsulfohydrazid this rubber mixture as in the example 2. Example 5: The plate is manufactured according to one of the examples 1 to 4, treated with an adhesion mediator and coated then with PU-Gießpolyurethan by hardness 90 shores A.