Patent ID: 11919842
Assignee: WELDTONE TECHNOLOGY CO., LTD
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 3:
4. A method for preparing the polymercaptan compound according to claim 1, the method comprising the following steps:
step 1: performing substitution reaction on a phenol compound represented by formula (II) and a first compound represented by formula (III) in the presence of a phase transfer catalyst and under an alkaline condition, and purifying to obtain a first intermediate product as a colorless or faint yellow liquid;
step 2: performing radical addition reaction on the first intermediate product and thioacetic acid in the presence of a radical initiator, and purifying to obtain a second intermediate product as a colorless or faint yellow liquid;
step 3: performing hydrolysis reaction on the second intermediate, and purifying to obtain a product as a colorless or faint yellow thick liquid, i.e., the polymercaptan compound;, in the formula (II), R1, R2, R3, R5, R7 and R8 are each independently selected from one of a hydrogen atom, a lower alkyl group with 1-5 carbon atoms and an alkoxy group with 1-5 carbon atoms, and R9 and R10 are each independently selected from a 1-alkenylalkyl group with 3-5 carbon atoms;
in the formula (III), X represents chlorine or bromine, and m is 0, 1, 2 or 3.