Using sulfurization technology to contribute to human advancement in the fields of pharmaceutical intermediates and electronic materials

Multivalent mercaptan

(CAS No. 584-04-3)

Polyvalent mercaptans are characterized by their ability to contribute to photo-curing and thermo-curing reactions.
Using this feature, it is anticipated that they will find applications in highly refractive resins, coating materials, adhesives, paints, etc.
In addition, mercaptans are widely used as chain transfer agents in radical polymerization, curing agents for epoxy resins, cleaning agents for electronic parts, and thin copper film manufacturing. It is expected that they will become even more sophisticated, with more applications in the future.
We have recently developed a technology for manufacturing polyvalent mercaptans and have the ability to provide the following compounds. We would like to ask you to consider using these.

　

① G-2S(A) CAS No. 584-04-3
② PE-2S CAS No. 19333-66-5
③ PE-3S CAS No. 500283-12-5
④ PE-4S CAS No. 4720-60-9
⑤ TMP-3S CAS No. 121318-18-1

　

In addition to having 2 to 4 mercapto groups, these have various other characteristics, such as having 1 or 2 hydroxyl groups (① to ③) and having a significantly high sulfur content (①52%, ③52%, ④64%, ⑤53%) … and there are many others. Therefore, such qualities are anticipated to modify the substance’s character by enhancing the hydroxyl group: high refractive index, high heat resistance, transparency, and flexibility.
These are all 97% or more pure.
They have little or no odor.
①, ③ are liquids, ②, ④, ⑤ are solids.
Both are stored in a nitrogen atmosphere.
Solubility varies depending on the compound, but it is usually slightly soluble or difficult to dissolve in water, is soluble in ether, and easily soluble in alcohol, toluene, and hexane.

Compound name	Property	Solubility information
G-2S(A) 1,3-Dimercapto-2-propanol	Transparent colorless to pale yellow liquid Refractive index 1.566	Heptane	× Insoluble
		Toluene	◎
		Ethyl acetate	◎
		Ethyl cellosolve	◎
		Methanol	◎
		Water	×5% Dissolves
PE-2S 2,2-Bis(mercaptomethyl)-1,3-propanediol	White solid Melting point 95 ˚C	Heptane	×
		Toluene	×
		Ethyl acetate	△
		Ethyl cellosolve	○
		Methanol	○
		Water	×
PE-3S 3-mercapto-2,2-bis(mercaptomethyl)-1-propanol	Colorless to slightly yellow solid Melting point 35 ˚C	Heptane	×
		Toluene	◎
		Ethyl acetate	◎
		Ethyl cellosolve	△
		Methanol	◎
		Water	×
PE-4S 2,2-Bis(mercaptomethyl)-1,3-propanedithiol	Colorless to slightly yellow solid Melting point 71 ˚C	Heptane	△
		Toluene	△
		Ethyl acetate	△
		Ethyl cellosolve	△
		Methanol	×
		Water	×
TMP-3S 2-Ethyl-2-(mercaptomethyl)-1,3-Propanedithiol	Colorless to slightly yellow solid Melting point 45 ˚C	Heptane	◎
		Toluene	◎
		Ethyl acetate	◎
		Ethyl cellosolve	◎
		Methanol	○
		Water	×

At 25 ˚C　◎: 50% (wt/wt)　○: 25% or more (wt/wt)　△: 10% or more (wt/wt)　×: 5% or less (wt/wt)