Quality index and application of disproportionated rosin

Disproportionated rosin quality index.

Now, there are many countries in the world where the production of disproportionated rosin is in the United States, Japan and China. The disproportionated rosin in our country is divided into special grade and grade one, and the quality indicators are shown in the table below.

Disproportionated rosin quality index.

Application of disproportionated rosin.

Production of styrene-butadiene rubber emulsifiers, early is fatty acids, but preparing is fatty acids from animal fats, source is limited, so the United States since 1942 research made of synthetic rubber disproportionated rosin emulsifier, 1944 formally put into production. Subsequently, Japan, China and other successively produced disproportionated rosin. Produced each year all over the world in the 1980 s disproportionated rosin nearly 20 * 104 t, is mainly used for butyl benzene (SBR), chloroprene rubber (CR), acrylonitrile butadiene (NBR), acrylonitrile - butadiene - styrene (ABS), such as synthetic rubber production, polymeric emulsifier. With the development of synthetic rubber industry, the demand for emulsifiers is increasing.

When using disproportionated rosin as the emulsifier of styrene butadiene rubber, it is generally used to make rosin potassium soap. The emulsifier has the following advantages: 1. 2. The wear-resisting strength and tear strength are better than ordinary styrene butadiene rubber, which can improve the driving range of the tire; 3. When mixing with natural rubber, the adhesive can be improved greatly; 4. Because the rubber coating and fiber bonding are good before vulcanization, it is possible to carry out the adhesive work faster and save labor. 5. When mixing with carbon black, it can be sealed mixer, so it can improve labor intensity.

In addition, vulcanized rubber block phenomenon, bending resistance and tensile strength are improved, can be made into advanced rubber.

Apart from being used as a synthetic rubber emulsifier, disproportionated rosin is also used in the manufacture of water-soluble pressure-sensitive adhesive. If use 70% 60 disproportionated rosin sodium salt solution (in accordance with the quality plan, similarly hereinafter), polyvinyl formaldehyde 20, glycerin 30, ethyl acetate, 20, 50 water can produce a kind of pressure sensitive adhesive, on paper, cloth, wood, glass, pottery and porcelain, synthetic resin and metal bonding.

Disproportionated rosin alkali metal soaps and dimer fatty acids can be used as emulsifiers for the polymerization of unsaturated hydrocarbons.