CS230445B1 - Deodorant component of blowing agent - Google Patents

Abstract

The invention relates to the use of caprolactam and/or its oligomers as a deodorant component in the production and/or application of a blowing agent based on 1,5-endomethylene-3,7-dinitroso-1,3,5,7-tetraazacyclooctane in an amount of 2 to 40% by weight based on the total weight of the blowing agent. The invention can be used in the production or application of the blowing agent in the chemical, plastics or rubber industry.

Description

1,230,445

The present invention relates to the use of compounds having a peptide bond in a molecule as a deodorant, in the case of an activating additive in the manufacture and / or application of a blowing agent based on 1,5-endomethylene-3,7-dinitroso-1,3,5,7-tetraazacycloctane. In recent years, considerable attention has been paid to the deodorization of the polymeric materials, especially rubber products, with 1,5-endomethylene-3,7-dinitroso-1,3,5,7-tetraazacycloctane blowing agents. The reactive fragments which combine with each other by chemical interaction with the components of the rubber blend create an unpleasant smell of nitrogen compounds. The malodorous products remain in the rubber articles, which is one of the drawbacks of the use of blowing agents on this basis, to produce unpleasantly odorous thermolysis products of 1,5-endomethylene-3,7-dinitroso-1, 3,5, 7-tetraazacyclooctane can be suppressed by the addition of substances capable of reacting into the N-Mannich condensation in a different range. Of those known in the art and literature, mention should be made of the use of urea of fine grain size, or of a mixture of urea with polyols, the use of melamine, lower water-soluble condensates of formaldehyde with urea or with melamine, or in admixture with paraffinic oil and ethylene glycol, Saline nitro- and cyano-guanidine, guanidine thiocyanate, cyanuric acid, trihydrazino-s-triazine, tetrahydroimidazo [4,5-d] imidazole-2,5 (1H, 3H) -dione, activated water-insoluble formaldehyde condensation products with urea, sulphonated - 2 - 230 445 lignin compounds, trimethylolpropane derivatives, urethanes and the like

Some of the deodorizing ingredients are difficult to achieve, some reduce the physical and thermal stability of the blowing composition.

The aforementioned and other drawbacks of the known deodorant compositions of the present invention, according to which, as a deodorant additive in the manufacture and / or application of 1,5-endomethylone-3,7 r-dinitrozo-1,3,5-7 "tetraazacyclooctane based blowing agent, caprolactam and / or oligomers thereof in an amount of 2 to 40% by weight, preferably in an amount of 9.1 to 20.0% by weight based on the weight of the resulting blend. An advantage of the present invention is the ease of availability of caprolactam and its oligomers, as well as the fact that their addition does not specifically affect the stability of 1,5-endomethylene-3,7-dinitrotrozo-1,3,5,7 "tazazacyclooctane . Efficiency can be achieved by utilizing wastes, especially waste, from the production of polyamides. Based on the results obtained, it can be stated that in the course of storage the composition of the deodorant composition 5 according to the invention is not susceptible to agglomeration.

The use of caprolactam and its oligomers in accordance with the present invention has not been described so far, but is illustrated by the following examples, which do not limit the possible variability of the application. is technical 1,5-endomethylene-3,7-diuitroso-1,3,5,7-tetraazaoylooctane, precipitated calcium carbonate, water and a mixture of 75.03% by weight caprolactam and 24.97% by weight oligomeraprolactam with 2-5 monomers units, either with linear or cyclic linkages, 65% of 1,5-endomethylene-3,7-nitrite-1,3,5,7-tetraazacyclooctane, 20% of caprolactam mixture are prepared from the above raw materials. with its goror, 5% calcium carbonate and 10% water · This formulation does not change its consistency after 180 days storage temperature © 20 to 2 ° C · - 3 Example 2 230 443 Raw materials are available as in Example 1, only groundwater and a mixture of caprolactam with its oligomers is applied to a 49.83% aqueous solution of caprolactam and its oligomers (to 3-monomer units per molecule), resulting from the production of polyamides. 5% 1,3-endomethylene-3,7-dinitrozo-1,3,5,7-tetraazacyclooct of calcium carbonate, 9.3% of water and 9.1% of a mixture of caclactam with its oligomers. This free mixture does not change its consistency even after 180 days storage at 20-24 ° C. Example 3

The stability of the composition of Examples 1 and 2 is assessed on the basis of the isothermally specified wake-up induction periods at a temperature range of 190 to 220 ° C and the calculated explosion activation energies (E) and the extrapolated induction period value / Tau / explosion for 100 ° C calculated therefrom . Chempor PC-65, consisting of /% w / w: 65% of 1,5-endomyl-3,7-dinitrozo-1,3,5,7-tetraazacycloctane, 20.5% complex urea as a comparative figure with methyl urea, respectively. with methylenebismurea and 14.5% water. The results are presented in the following table view; Stability characteristics Sub-Example Mix 1 Sub-Example Mix 2 Yet * Chempor PC-65 Activating Energy /kJ.mol"1/ 45.06 56.32 38.96 Tauioo / s / 1713.6 2896.8 798.2 Example 4

The effect of the mixture of Examples 1 and 2 on the vulcanization system of the rubber mixture is monitored under standard conditions with respect to the commercial Chempor PC-65 mixture / composition see. in example 3 / for vulcanization temperature 155 ° C with rheometer - 4 230 445 "Cone Rheometer type 100".

Characteristic Mixture according to the mixture according to the vulcanization mixture of Example 1 of Example 2 Chempor PC-65 5ff. mm / Km / 4.9 4.1 4.8 ^ rax / Nm / 14.6 14.0. 15.0 Si / S / 305 290 270 / s / 725 740 650/3/195 205 220

Comment:

Max

% 1tv90tA is the minimum torque is the maximum torque is the processing safety is the time of optimal vulcanization is the start time of the decomposition of the blowing agent in the rubber mixture / the beginning of the gas release /

The incorporation of the mixtures of Examples 1 and 2 into the rubber composition is better than the comparative commercial mixture of Chempor PC-65. The deodorizing effects of the composition of Example 1 are slightly lower, the compositions of Example 2 being the same as the commercial ChemporPC-65 mixture. Examples-1 and 2 are the same as the commercial Chempor PC-65.

Claims (1)

EMBODIMENT OF THE INVENTION 230 44 The use of kapcaprolactam and / or oligomers thereof as a disorientation component in the manufacture and / or application of blowing agents provides 1,5-enomethylene-3,7-dinitroso-1,3,5,7 % tetraazacyclooctane in an amount of 2 to 40% by weight, preferably in an amount of 9.1 to 20.0% by weight; to the total weight of the blowing composition.