SUSTAINABILITY

Company News

Market News

Social Responsibility

Home page

Barium stearate dry and water process & Application

Release time:

2024-12-27 10:29

Source:

Barium stearate dry and water process & Application

There are significant differences in the production process, product characteristics, and reaction mechanism between the Dry and Water process (wet method) of Barium stearate. The following is a detailed analysis of the differences:

1、 Production process

1. Dry Process (melting method)

·Process method: Metal oxides (such as Barium carbonate or barium hydroxide) are directly added to molten stearic acid, and a certain temperature, pressure, and stirring speed are controlled to obtain barium stearate through the reaction.

·Reaction conditions: Higher temperature and molten state are required to ensure sufficient reaction between stearic acid and metal oxides.

·Catalyst use: carried out in the presence of a catalyst to facilitate complete reaction.

2. Water process (wet method)

·Process method: Under the condition of water as the medium, a catalyst is added, and a certain temperature and pressure are controlled. Then, a metal hydroxide (such as barium hydroxide) is added, and the metal ions are replaced onto stearic acid through the catalyst to generate barium stearate.

·Reaction conditions: relatively mild, using water as the reaction medium, generating the target product through chemical reaction.

·Catalyst function: Catalysts play a crucial role in the reaction by displacing metal ions onto stearic acid, resulting in the formation of stearic acid salts.

2、 Product Features

1. Dry process products

·Acidity and alkalinity: Due to the presence of catalysts and a slight excess of metal oxides, products produced by dry methods usually exhibit alkalinity.

·Physical state: The finished product is a white or slightly yellow powder crystal with water absorption in air.

·Solubility: Insoluble in water and ethanol, but soluble in non-polar solvents such as hot ethanol, benzene, toluene, etc.

2. Water based products

·Acidity and alkalinity: Due to a slight excess of stearic acid in the reaction, products produced by water method usually exhibit acidity.

·Physical state: Powder crystals that are also white or slightly yellow in color, but their specific physical properties may vary depending on reaction conditions and subsequent processing.

·Solubility: Similar to calcium stearate produced by water method, barium stearate has lower solubility in water, but may vary due to differences in product purity and preparation process.

3、 Reaction mechanism

1. Dry process: In a molten state, stearic acid reacts directly with metal oxides to generate barium stearate through the catalytic effect. This process mainly relies on chemical reactions at high temperatures and in a molten state.

2. Water method: Under the condition of water as the medium, metal ions are replaced onto stearic acid through the action of a catalyst to generate barium stearate. This process involves chemical reactions and ion exchange processes in the aqueous phase.

4、 Application

Due to its unique chemical properties, barium stearate is applied in multiple fields, and its effects vary in each field

1. Metal processing: Lubrication treatment during cold extrusion, cold stamping, and cold drawing of metal materials. Especially suitable for workpieces with high elongation, high deformation rate, and complex surfaces.

2. Soft product processing: also used for clean soft films and utensils such as food packaging and medical equipment. It can also be used as a halogen absorbent for polyethylene and polypropylene to reduce the adverse effects of residual catalysts on color and stability.

3. Hard product processing: Cooperate with basic lead salt and lead soap to improve the gel speed.

4. Plastic processing industry: It can also be used as a heat stabilizer for polyvinyl chloride and a lubricant for various plastic processing, release agent, etc.

5. Paper industry: As a lubricant for paper coating layers, it can enhance the lubricity and hydrophobicity of the coating surface, improve the lubrication and delicacy of the coating, make the paper smooth and flat, and prevent cracking after drying.

6. Printing industry: Super calendering machines and cutting and printing processes can prevent powder and hair loss, thereby improving the appearance and printing performance of paper.

7. Polyurethane demoulding: It can be used for RIM reaction injection molding, PU foam and high resilience opening to improve the hardness of its coating film. And it does not affect the surface color, adhesion, paint resistance, etc. of the product.

8. Rubber industry: Plasticizers are used in rubber processing to soften natural rubber and whole rubber, with almost no effect on vulcanization. In addition, barium stearate can be used as a rubber isolation agent, which can be added to rubber and stirred to allow barium stearate to adsorb on the surface of the rubber, thus achieving the effect of isolating rubber from each other

In summary, there are significant differences between the dry and water methods of barium stearate in terms of production process, product characteristics, and reaction mechanism. The selection of which method to produce barium stearate needs to be comprehensively considered based on specific application requirements, production costs, and product quality requirements.

None

How to choose the Right Lubricant additives for WPC?

None

How to choose the Right Lubricant additives for WPC?