Organic Additives/Inhibitors to Car Coolant

...."In Asia, problems with water pump seals and poor heat transfer have led to the ban of coolants containing silicate. To provide protection, most coolants contain a mix of carboxylates and inorganic inhibitors like phosphates.

These coolants are hybrids. They are distinct from the European hybrids due to the lack of silicates. Coolants from Asian OEMs can be a variety of colors including red, orange and green.

Extended-life carboxylate-based coolants were developed to be globally acceptable and provide superior performance over existing technologies. This technology is also known as organic additive technology (OATs). Because full carboxylate coolants have no silicates, they meet the stringent requirements of the Asian specifications.

They also meet the European antifreeze requirements because they have no phosphates. These engine coolants have developed international popularity due to having an unsurpassed corrosion protection for extended time intervals.

It is worth noting that some people refer to these as “organic additive technology” (OAT) because the inhibitors which provide the corrosion protection are derived from carboxylic acids. In actuality, the protection is provided by neutralized carboxylic acids called carboxylates.

This distinction is important because all coolants operate in the neutral or basic pH range (pH equal to or greater than 7). In fact, most coolants are made beginning with an acidic precursor, for example, conventional coolants based on phosphate start their lives as phosphoric acid.

Carboxylate inhibitors provide corrosion protection by chemically interacting with the metal surfaces where needed, not by universally laying down layers, which is the case with conventional and hybrid coolants.

The implications of this functional difference are enormous: extended life cycles, unsurpassed high temperature aluminum protection, as well as heat transfer advantages on both hot engine surfaces and heat-rejecting radiator tubes where heat transfer is critical to optimal performance. High quality carboxylate-based coolants have demonstrated performance of more than 32,000 hours in stationary engine applications without being changed.

One measure of true extended life performance is that at the end of a fleet test, the used coolant can be removed from the engine and still successfully pass tests designed for fresh coolants!"...

https://www.machinerylubrication.com/Read/841/coolant-fundamentals

https://www.khanacademy.org/test-prep/mcat/chemical-processes/carboxylic-acids/a/carboxylic-acid-reactions-overview

So you probably need to hire a chemist and have them produce a proprietary formula...