CS239380B1 - A method for producing a foam-coated vulcanizate coated fabric - Google Patents

Abstract

A method of producing a flat structure coated with a foam vulcanizate, based on synthetic and/or natural rubber in a mixture with other additives, coating and vulcanization, where the coating mixture contains a chlorinated vinyl polymer in the form of powder particles as an active filler and chemical blowing agent with conditions selected so that the coated structure is thermally exposed and, if necessary, can be subsequently spatially patterned.

Description

239380

BACKGROUND OF THE INVENTION The present invention relates to a process for the production of a foamed vulcanization-coated sheet, wherein the conditions are chosen such that the choice of ingredients will simplify the fabrication technique of the sheet and improve the quality and performance. Nowadays, the elastic sheet material is coated with foam vulcanizate, particularly suitable for floor coverings, footwear and the like. they are mainly produced by laminating, gluing and other bonding with coated, mainly textile material.

The high publishing activity of the patent literature in this area is directed to the extra-layered planes whose layered stages have their functions (EP 75 479, FRG PAT 2 728 774, 2 839 165, 2 912 793, 3 006 993, 3 203 302, USA) PAT 4 385 024, 4 241 124, GDR PAT 200 972, Svaj. PAT636 507, Jap. PAT 58 115 195, 58 109 001, GBPAT 1 600 745 and Franc. PAT 2 507 537]. they use latex polishes, melt powders or granules, rubber, plastics such as polyurethane, etc.

The individual layers which fill the barbecue functions, e.g., deodorizing, fungicidal, adherent, water-permeable, and the like. are filler powders such as activated carbon, copper powder, titanium dioxide, pigments, aluminum hydroxide, and others. Often the elastic component is a foam latex formed by mechanical agitation.

The disadvantage of current technology is the demand for machine equipment, such as foam generators, laminators, pulverizers, presses and welders. Furthermore, in the case of the use of solvent-based adhesives, the environmental hazards of the working environment increase the toxicity and / or the risk. fire or explosion.

The above-mentioned and other disadvantages are solved by the present invention, wherein the method of producing a sheet-like surface-layer coated with synthetic and / or natural rubber latex foam in admixture with other additives, coating and vulcanization is such that the coating composition comprises a coating composition comprising an active filler consisting of a chlorinated vinyl polymer in the form of powder particles in an amount of 5 to 150% by weight; and a chemical blowing agent having a decomposition temperature of 70 ° C to 220 ° C in an amount of 0.1 to 10% by weight. counted on the non-volatile rubber latex component, and the coated structure is thermally exposed to a temperature of 80 ° C to 180 ° C and optionally the resulting spatial pattern. An advantage of the present invention is its economical and technological simplicity, whereby the polymeric filler based on chlorinated vinyl polymers also allows the use of synthetic latexes of e.g. buta-diene-styrene with a lower content of non-volatile component which cannot be given by conventional fillers. technology. In the event that the foamed vulcanizate-coated layered material becomes a chlorinated vinyl polymer-based filler, it introduces the respective burn-in deposit of the composition as a whole. This is reflected in the corresponding increase in product fire safety. Another advantage of the process according to the invention is the possibility of subsequent spatial formation in connection with the content of the thermoplastic polymeric filler. Spatial patterning makes it possible to increase the elasticity of the entire structure, which is an advantage for the use of this material as a tread layer in flooring, in footwear inserts and in other applications.

Coating agents are understood to mean surfactants, bulking agents, coagulating agents and alkalis.

The term chlorinated vinyl polymers refers to homopolymers and copolymers of vinyl chloride and vinylidene chloride with vinyl acetate and other comonomers.

As blowing agents, it is possible to use at least one thermolabile with a temperature of 70 to 220 CC, from the group of azo compounds, derivatives of hydrazine and N-nitroso compound, preferably 1,5-methane-3,7-dinitroso-1, 3,5 , 7-tetraazacyclooctane, azo-diisobutyronitrile, N, N'-dimethyl-N, N'-dinitrosoterephthalamide, 1,3,5-trinitroso-1,3,5-triazacyclohexane, benzenesulfohydrazide, p-toluenesulfohydrazide , azo-dicaronamide and a mixture thereof with 1,5-methano-3,7-dinitroso-1,3,5,7-tetraazacyclooctane.

However, the method of the invention described is a nonion but is limited by the following examples. All percentages are by weight unless otherwise indicated. EXAMPLE 1 100 kg of t-butadiene-styrene latex with a non-volatile component content of 53%, with a styrene content of 27% calculated on a non-volatile component, 1.4 kg of a succulent surfactant containing 35% of active ingredient, 2 are mixed in a homogenizer. 5 kgazodicarbonate, 1 kg of a 30% aqueous solution of alkylbetaine, 35 kg of emulsion-forming polyvinyl chloride powder with the following specification: K value Bulk densitySilk residue 0.5 mm0.25 mm0.1 mm0.063 mmSulphate ashFrequencyAlkalite 70 + 1.50.35 + 0.04 g. cm-1 max. 0.1% max. 2% max. 1.5% max. 0.6% max. 0.1% 10 kg of aluminosilicate (A12O3.4 SiO2 .. 6H2O) natrified with 8% anhydrous

Claims (5)

SUBJECT Process for producing a foamed vulcanizate sheet based on synthetic and / or natural rubber in admixture with other additives, coating and vulcanization, characterized in that a coating composition comprising an active filler consisting of chlorinated vinyl polymer is applied to the material to be coated. % In the form of powder particles, in an amount of 5 to 150 wt. calculated on the coated material and the chemical blowing agent with a decomposition temperature of 70 to 220 ° C, in an amount of 0,1 to 10 washes. wt. calculated on the nonvolatile component of the rubber latex, and the coated structure is thermally exposed at a temperature of 80 to 180 ° C and optionally subsequently spatially patterned.