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The Difference Between Nitrile Rubber and NBR Latex The Difference Between Nitrile Rubber and NBR Latex

Affected by public health incidents, NBR latex is like a dark horse that has attracted the attention of the international market. Nitrile rubber and NBR latex are very different in use.


1. The difference in performance between nitrile rubber and NBR latex


Nitrile rubber is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high abrasion resistance, good heat resistance, and strong adhesion. . Its disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation performance, and slightly lower elasticity. Nitrile rubber is mainly used to make oil-resistant rubber products.


Carboxylic nitrile latex is obtained by introducing methacrylic acid or methacrylate ternary copolymer during polymerization. Since the carboxyl nitrile nitrile latex introduces a more polar carboxyl group into the molecular backbone, it further improves the activity and bonding strength, and improves the compatibility with other polymer materials. Therefore, carboxylated nitrile latex not only maintains the properties of nitrile latex, but also has many new excellent functions: enhanced the interaction between chains, the surface chemical properties of latex particles are well improved, and the mechanical stability of the latex , Thawing stability, adhesion, film-forming properties and post-processing performance have been improved.  And chemical intermediates manufacturers use the characteristics of carboxylic nitrile latex to produce chemical products. The modified carboxyl butyronitrile latex is easy to vulcanize and can be cross-linked with metal oxides such as zinc oxide, lead oxide, etc. without sulfur. It can also be vulcanized with phenolic resin, urea-formaldehyde resin, epoxy resin and polyamine to make the film The mechanical strength is greatly improved, and the stability is better.


2. The difference in use between nitrile rubber and NBR latex


From the perspective of the demand structure of nitrile rubber in recent years, the largest proportion is still the hose and tape industries, followed by the foaming (insulation) materials industry, and the sealing materials industry is ranked third. However, due to factors such as shrinking automobile production and sales, the proportion of hoses, tapes and sealing materials has declined significantly, especially for sealing materials. In recent years, real estate capital investment and air-conditioning output have increased, stimulating the demand for foaming (insulation) materials, especially the chemical foaming agents.


The nitrile latex has a fast film forming speed, easy to peel off, good processing performance, and better products. Therefore, in recent years, carboxyl nitrile latex has developed rapidly, especially in the industries of thick, thin, undershirt, undershirtless gloves, and sealing materials.


Therefore, public health incidents have stimulated the demand for medical gloves. Carboxy nitrile rubber latex is its main raw material. Nitrile rubber cannot replace carboxyl nitrile rubber in this industry. Therefore, the two have certain differences in form and main purpose.

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