SUSTAINABILITY H O Si O H End-of-Life Silicone n +R1 -R3 NH2 OH +H2 O -R1 OH H O Si O n
Amino-modifisiertes Silicon
NH NH NH2 NH2
Katalysator 3 -R2
OH
Figure 2: Waste-to-value – from end-of life silicone to a new, amino-modified silicone
They are then are modified, and then finally polymerized into – for example - a new modified silicone of virgin quality, which can be used for personal care products (Figure 2).3,4
Silicones contribute to water conservation Water saving is and will get increasingly more important. Manufacturing silicones requires low usage of water and therefore is an ideal technology for supporting water conservation projects. This is particularly so in comparison to similar polymers derived from plants - where silicones have a clear advantage in respect of water consumption. Raw material consumption of producing
Si O Si m O H R2 O Si O R2 Si O Si O
■ Silicone ■Methanol ■ HCL ■ Electricity ■ Heat ■ Other
O Si
2% 6%
O Si
11% 66%
Figure 3: Relative contribution to the raw material for a silicone (PDMS)
silicone polymers is shown below in the graph (Figure 3). To produce a silicone, approximately 66% of silicon is needed - which is obtained out of quartz. Additional chemicals are hydrochloric acid and methanol. There is no demand of water for making a silicone polymer, which can help to protect this important substance.5,6,7,8
CHT´s contribution - CHT-BeauSil RE-AMO 919 EM The silicone experts of CHT have successfully developed a product for the use in personal care applications based on recycled monomers made from end-of-life silicone polymers. CHT-BeauSil RE-AMO 919 EM is an emulsion based on Gluconamido amodimethicone
INCI: Aqua (and) Gluconamido Amodimethicone (and) Coco glucoside
Non-volatile contents: 25-30% Preservative system: MIT/BIT and Paraben free Figure 4: CHT-BeauSil RE-AMO 919 AMO
11% 75% 14% 13% 1% Figure 5: CHT-BeauSil RE-AMO 919 EM composition
www.personalcaremagazine.com September 2022 PERSONAL CARE
polymer, which is a universal ingredient for hair care (Figure 4). The emulsion can be used in various hair care applications like shampoos, conditioners, and water-based treatments. CHT was able to develop a process to use recycled monomers to gain the highest purity of a second-life life polymer for personal care. More than 94% of the silicone part is made
from recycled monomers. The sugar part and the surfactants are naturally sourced ingredients. At the end, the product contains less than 1% synthetic ingredients (Figure 5). The smartly engineered process at CHT ensures that the final quality will not be different from classic monomers. CHT-BeauSil RE-AMO 919 EM contains in
total 13% recycled monomer which is in relation to the used silicone polymer of more than 94%. The application assessments confirm the high quality of this CHT-BeauSil RE-AMO 919 EM compared to the classic version. A thorough screening in the lab was done to ensure that the new polymer will show similar performance as the polymer made from classic monomers, so that the customer can easily switch to the sustainable version.
Ingredients from natural source ■ Si-Recycled Monomers ■ Synthetic ingredients ■ Water ■
R1 O Si O R1 12% 3%
77
Katalysator 1
Katalysator 2
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