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Standartinė said samir » 2021 Sau 14, 06:18

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In 1952 AD, polysocyanates became commercially available.
In 1954, elastomeric polyurethane elastomers were produced using Toluene Diocyanate (TDI) and polyester.
These materials were also used to produce rigid foams, rubbers, and elastomeric polymer plastics, and linear fibers were also produced from Hexamethylene Diazocyanate (HDI) and Butanediol (BDO).
In 1956, the DuPont Corporation introduced polyether polyol, specifically tetramethylene ether.

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Its evolution
In 1957, he began selling polycycline glycol. Polyether polyol was cheaper and easier to handle,
It was also more water resistant than polyester polyol, and became more popular.
Specialized companies have also started making polyurethane chemicals.

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said samir
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