The Catalyst is a Complex Compound Obtained by Complexing Platinum as the Main Body with an Inhibitory Ligand.

Feb 28, 2022

Technical field
The invention relates to a catalyst suitable for insulating impregnating varnish and a preparation method thereof. In particular, it refers to a solvent-free organic silicon insulating dipping varnish catalyst and a preparation method thereof. The preparation method of the catalyst is mainly used for preparing a solvent-free organic silicon insulating dipping varnish catalyst.

Background technique
Insulating impregnating varnish is a kind of insulating material, which is mainly used in the insulation dipping treatment of motors, transformers and dispersive winding coils, and mainly plays the role of electrical insulation and bonding. With the continuous advancement of science and technology, people continue to make electrical machinery and other equipment to develop in the direction of large capacity, miniaturization, high efficiency, resistance performance and intelligence, and power transmission and transformation products to high voltage, large capacity and long-distance transmission Due to the development, higher and higher requirements are put forward for the quality and reliability of electrical insulation materials; and with the strengthening of human environmental protection awareness, various solvent-free and green insulation varieties are more and more favored and recognized. At present, a large number of solvent impregnating varnishes are still being produced and used every year in the world, and the discharge of solvents will directly lead to the deterioration of the living environment of all mankind. Solvent-free silicone impregnating varnish has many advantages such as excellent insulation properties such as high heat resistance, water repellency, pressure resistance and anti-corona, as well as many advantages such as green and environmental protection. It is a new type of insulation with great development prospects, so it is necessary to add In-depth study. However, to prepare excellent solvent-free silicone impregnating paint requires a solvent-free silicone impregnating paint catalyst. The solvent-free silicone impregnating paint catalyst should be a special platinum complex catalyst, which is used in initiating impregnating paint. The addition reaction of the vinyl group and the hydrosilyl active group is different from the catalyst naphthenate and caprylate of the solvent-based silicone impregnating varnish. It is characterized by initiating an addition reaction with a small amount. It is an active anion initiation system and has the advantages of stable existence at room temperature and catalytic polymerization at high temperatures. Although the current silicone impregnating varnish catalyst can be used, its performance and effect are not very good, so it is necessary to improve it.

Summary of the invention
The purpose of the present invention is to develop a special type of platinum complex catalyst for a new type of solvent-free organic silicon impregnating varnish. The catalyst is a complex compound obtained by complexing platinum as the main body with an inhibitory ligand. Type catalyst and its preparation method. It is characterized in that it is stored stably at room temperature, and catalyzes the curing of the impregnating paint to form a film at high temperature.

The present invention is achieved through the following technical solutions:-A solvent-free silicone impregnating paint platinum complex catalyst, mainly using chloroplatinic acid and tetramethyldivinyldisiloxane as the main body of the catalyst, with a belt suppression A type of catalyst obtained by complexation of effective ligands. This type of solvent-free silicone dipping paint platinum complex catalyst has some inhibitory effects.
The preparation process of the solvent-free organosilicon insulating impregnating varnish catalyst of the present invention is:

Dissolve the proportion of chloroplatinic acid in 40~80 parts by weight of toluene, then add the proportion of tetramethyldivinyl disiloxane, and then add the proportion of the ligand with inhibitory effect , Stir uniformly, reflux and stir at 110~130°C for 4~6 hours, and then distill toluene under reduced pressure to obtain a platinum complex catalyst with inhibitory effect. The solvent-free organosilicon insulating impregnating varnish catalyst prepared according to the formula and the preparation process of the present invention initiates an addition reaction with a small amount, belongs to an active anion initiation system, and has the advantages of stable existence at normal temperature and catalytic polymerization at high temperature. The amount is less than 1% of the amount of resin. It can be homogeneously dispersed in the paint base without the aid of solvents such as toluene. Its catalytic molecule contains inhibitory ligands, so that it does not have a catalytic effect at room temperature, and will play a catalytic effect when heated to a certain temperature.

Detailed description
The present invention will be further described below in conjunction with specific embodiments.
Example 
A solvent-free organic silicon impregnating paint platinum complex catalyst, which mainly uses chloroplatinic acid and tetramethyl: divinyl: disiloxane as the main body of the catalyst, and is obtained by complexing with a ligand with inhibitory effect A type of catalyst. This type of solvent-free organic silicon impregnating varnish platinum complex catalyst has some ligands with inhibitory effect. The ligands are compounds containing N and P and peroxide-based pyridine.