Why is the platinum-based silicone curing agent the most environmentally friendly choice?
The curing process has no by-products and the cross-linking structure is stable
The reaction is pure and no small molecules are released
The addition curing reaction is a hydrosilyl addition reaction (Si-H + Si-Vi → Si-Si). No water or low-molecular organic matter (such as amines and acetic acid) is released during the whole process, which avoids the problems of bubbles, corrosion, odor, etc. caused by by-products of traditional condensation-type silicone (such as tin-containing curing agents).
Typical applications: Medical-grade silicone (such as catheters and breast augmentation prostheses) must absolutely avoid residual by-products, and platinum curing is the only choice.
High and uniform cross-linking density
Under platinum catalysis, the molecular chain is linearly cross-linked to form a three-dimensional network structure, which is more uniform than the "local cross-linking" of condensation-type silicone, thus giving the product:
Higher mechanical strength (such as tensile strength up to 6-10MPa, tear strength>30kN/m);
More stable high temperature resistance (long-term temperature resistance of 180-220℃, short-term temperature resistance of 250-300℃), and not easy to yellow or embrittle at high temperatures.
Environmentally friendly and non-toxic, in line with strict safety standards
Non-toxic and physiologically inert
The platinum catalyst itself has no heavy metal toxicity, and after the reaction, it is completely embedded in the molecular structure, without any residual risk. The cured silicone meets the standards of **FDA, LFGB, ISO 10993 (medical grade)** and is widely used in food contact (such as cake molds, baby pacifiers) and medical implants.
Low VOC emissions
No volatile organic compounds (VOCs) are released during the reaction process, which meets the requirements of environmental regulations (such as EU REACH) and is suitable for the needs of environmentally friendly materials such as interior decoration and electronic equipment.