METHOD OF MANUFACTURE OF PAINT AND ADHESIVE RUBBER FROM VULCANIZED RUBBER

Abstract: Method of manufacture of paint and adhesive of rubber from vulcanized rubber that is reclaimed, becoming a product that provides impermeability, flexibility and resistance to the pellicle by process of reduction to small particles through cracking beater mills, immerged in adequate solvents and recovered in ball mills to which is added products such as dyeing, pigments, asphalts, oils, accelerators, resins, etc., which give to the paint or adhesive its final characteristics.

Description: METHOD OF MANUFACTURE OF PAllMF AND ADHESIVE RUBBER FROM VULCANIZED RUBBER- The present invention is related to a method for obtaining industrial paint and adhesive, with proper coloration, approximated to vulcanized rubber which is used as basis prime material . The method is developed first from vulcanized rubber artefacts whicn have already been used such as pneumatic, scraps or others within a system that causes in the formation oτ free radicals in very small particles of rubber in mixture or in suspension in solvents forming a product that is posteriorly conbineα with filers, oils. resins, dryers, curing agents, asphalts, etc. According to public knowledge, the adherence of the rubber in the composition of paints and adhesives, garatees to the final product important and indispensable characteristics to its application such as flexibility, adherence, resiliency,etc. Usualy wnen such requirements are nesessary, accordinα to its application, being very used in the conventional tecnique the incorporation of raw rubber, which can remain in that state or in others, after, this application is submitted to a vulcanisation process or cure. WO 92/01760 PCT/BR91/00014 Rare are the occasions when the formulation of paints or adhesiv s incorporate or βmpLoy reclaimed rubber, when this happens, normally it is applied in the condition of filers, presenting only a reduction in the final product cost, in order to get better commercialization. However, this causes serious inconveniences when eVnployed in small quantities, the reclaimed rubber turns the product rough and irregular, when a smooth and homogenous aspect is necessary. In order to eliminate such disadvantages and inconveniences in the tradicional practice and wishing to permit a perfect utilization of the characteristics of the reclaimed rubber and also to obtain a smooth and homogenous final product, this present method has been developed. According to the manufacture method describe as follows, a reclaimed rubber in perfect integration with the solvent in which it is prepared, is obtained with the addition of other products such as filers, resins, corants, asphalts, anti-oxidants, oiLs, etc. This method consists, in obtaining a reclaimed rubber from a vulcanized rubber reduced to small particles through industrial cracking mills ot scraps of tyres to be reccaped. r These small particles of vulcanized rubber are sel 1ected by passing through εeparetor screens, leaving the refused material to be crushed aqain in the cracking mills. These particles are immerged in to adequate solvents, being given preference to those which belong to the formularization of paint or the adhesive, to which other products such as oils, resins, asphalts, pigments, corants, degraders, vulcanizer agents, etc are added. This mixture iε placed in mills for homogenization and recuperation of vulcanizer rubber. In this way, the paint or the adheseve may come out ready from the milling or in case the principal product, is prepared a composition might be done considering that the preparation of the rubber is made as previously describe in document PI 8500981. Here are some examples, which have as objective the presentation of some practical aspects of the mentioned invention and shouldn't be considerate as li it ives in relation to the possibilities pertinent to the invention and understanding of inventive unity EXAMPLE 1 Tσ SKg of toluene, l Kg of scraps of tyres that have passed through a screen of 5 wires/centimetre and lOOgr of oil, is added. The mixture has been previously beated in a steel ball mill composed of a league of iron and manganese, during 48h. The final product obtained has been mixed with 500g of asphalt and passec in a 3 cylindrer mill to be uniform. The final product has been corect with solvent to be painted with pistol and applied on a iron sheet or wood properly prepared. The product presented a smooth, homogeneous and flexible surface. lo bKcj t t r i hloi et.hyluiui, llv ul ώ i aμa of tyros that have passed through a screen of h wires/centimetre and lOOgr of • oil is added. The material has been beaten in a ball mill with steel balls, brass balls during 30h. lOgr of sulphur and 2gr of disphenylguanadine, 20gr of resine phenolic non-reactive, passed in a 3 cylinder mill was added to be uniform. A sample of square wooven and a sheet of polyethilane with low density have been prepared. A layer of the product was applied on the surface of two samples. On this painted ply another superposed one was applied forming between them a strong adherence to the cement- slab also painted with the same product, a sheet of polyethylene was applied, presenting to the cement slab a total impermeability to water.

Claims: C L I M I N G 1-- Method of manufacture of paint and adhesive of rubber from vulcanized rubber obtained at first from vulcanized rubber by reduction process to small particles through beater mills, immerged in adequate solvents preferably the same of the paint and adhesive and recovered in a ball mill characterized for producting paint or adhesive adding products like dyeing, pigments. asphalts, oils, accelerators, resins, etc., that give to the paint and adhesive its final characteristics. 2- Method according to a claiming 1 characterized by the fact of the addiction of pigments, corants, filers, asphalt, oils, accelerations, etc., been added together with the vulcanized rubber to be reccaped. 3- Method according to claiming 1 characterized by the fact that through the milling simultaneous regeneration of the vulcanized rubber and homogenization of the mixture and the final product is obtained. 4- Method that according to claiming 1 characterized by the fact that after vulcanized rubber has passed through the ball mills other products n be jncorporete.

Inventors: OLIVEIRA DA CUNHA LIMA LUIZ CA, OLIVEIRA DA CUNHA LIMA, LUIZ, CARLOS
Applicants: OLIVEIRA DA CUNHA LIMA LUIZ CA, OLIVEIRA DA CUNHA LIMA, LUIZ, CARLOS
Application year: 1991
Main classification: C08J11
IPC codes: C09D117, C09J117