DEODORANTS 127
450 400 350 300 250 200 150 100 50 0
410
400
214
60 Blank Cream-Soap Cleaner
Cream-Soap + 15% Polyfix ZRC 30 MT
Figure 6: Absorption of hydrogen sulfide by two market products without and with the addition of 15% Polyfix ZRC 30 MT.
formulation provides a significant change in the ability of the deodorant to absorb various types of unpleasant odours. Comparison of the developed product with
market products shows that the formulation containing the odour absorber concentrate 25 GP has an efficiency comparable to product 1. The absorption of hydrogen sulfide and acetic acid is better compared to product 2. The zinc concentration in both commercially available products was 3-4 times higher than in the product containing the odour absorber concentrate (25 GP).
It should be noted that the increased
efficiency of product 2 upon absorption of ammonia can be explained by neutralisation of ammonia due to relatively acidic pH 5.5 of product 2, but not because of the higher efficacy of odour absorber.
The activation of zinc ricinoleate plays an important role in the interaction with odour molecules as shown by the deodorant formulations. To achieve the desired effect, significantly less odour absorber concentrate is needed compared to a competitive product based on non-activated zinc ricinoleate. 25 GP was tested for its efficacy against artificial sweat by the independent Hohenstein Institute which is specialised in the detection of odours. Sweat odour intensity was evaluated in
20 0 Polyfix ZRC 25 GP Polyfix ZRC 30 MT Competitor’s product
Figure 7: Efficiency (%) of 5% solutions of Polyfix ZRC 25 GP, Polyfix ZRC 30 MT and competitor’s product regarding absorption of ammonia, hydrogen sulfide and acetic acid.
comparison to a reference by trained panellists using an olfactometric sampling unit. It was shown that the initial intensity of unpleasant odour will decrease from ‘extremely strong’ to ‘weak - very weak’ when using 10% solution of 25 GP (Fig 9). The results of a statistical survey (24 men
Table 2: Basic formulation of deodorant roll-on “Perfect Polyfix” with Polyfix ZRC 25 GP Ingredients
A Aqua
B Sucraclear HC-3 (Natural thickener) C Propanediol (Moisturizing agent)
Probiophyte Fresh (Mild preservative) Polyfix ZRC 25 GP (Odour absorber) Perfect Day (Fragrance)
D Citric acid
Weight % 90.7 1.0 1.0 2.0 5.0 0.3
qs to pH = 7.8 - 8.3
Procedure: Heat Part A up to 70°C, maintain temperature and add Part B while stirring. Mix until preparation appears homogenous. Cool down to room temperature while stirring. Add Part C in listed order. Adjust pH with Part D.
April 2020
and women) about the effect of 30 MT on various odours are shown in Figure 10. Testers had to evaluate odour intensity after spraying of an odour containing sample with diluted odour absorber concentrate solution on a scale of 1 to 6. The maximum odour intensity of the untreated substance was set to value of 6 as benchmark. This survey confirms the superior performance of 30 MT. On one hand 30 MT fights against unpleasant odours (smells of garlic, onions, fish, cigarettes, ammonia, butane and thioglycolic acid) and on the other hand it is perfectly compatible with perfumes and fragrances whose intensity remained almost unaffected after processing the odour absorber concentrate.
Application fields
The odour absorber concentrates can be used in many areas of our lives. With regards to industrial use it is found in different types
PERSONAL CARE EUROPE n Ammonia n Hydrogen sulphide n Acetic acid 100 90 80 80 73 60 65 40 67 80 68 83
12
Cleaner + 15% Polyfix ZRC 30 MT
45
Hydrogen sulfide (ppm)
Emciency (%)
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