Shenzhen Rosin Tec New Materials Co., Ltd.

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Disproportionated rosin

Disproportionated rosin

  • Overview: The essence of the disproportionation reaction is its own redox process. Disproportionated rosin is a product obtained by a disproportionation reaction in which part of the rosin is oxidized and the other part is reduced in the presence of a catalyst and the action of inorganic acid and heat. Disproportionated rosin is a mixture of dehydroabietic acid  (C19 H33COOH), dihydroabietic acid  (C19 H33COOH) and tetrahydroabietic acid (C19 H33COOH), with a molecular weight of 304.

    Product name: Disproportionated rosin

    Molecular formula:  C19 H33COOH

    Molecular weight: 300.45

    Detailed description of properties: slightly yellow to yellow-red transparent glassy solid with blue-violet fluorescence.

    Basic performance

    Light yellow brittle solid, relative density 1.067. Softening point ≥75℃. Boiling point 265℃ (2kPa). Refractive index 1.5400. Flash point is about 210℃. Soluble in alcohols; toluene, gasoline and other organic solvents.

  

QualityTechnical index:

Index name

Premium product

First grade product

Color, Lovibond color number ≤

yellow, 20 red, 2.1

Yellow, 40 red, 3.4

Organic acid content/%≤

0.1

0.5

Dehydrogenative acid content/%≥

52.0

45.0

Softening point (ring and ball method)/℃≥

75.0

75.0

Acid value/(mg/g, calculated as KOH)≥

155.0

150.0

Unsaponifiable matter content/%≤

10.0

12.0

 

Preparation method: Put the rosin into an aluminum or copper pot, heat and melt, then continue to heat to (270℃±10)℃, perform a disproportionation reaction through a palladium-carbon catalyst, and the product is vacuum distilled to obtain the finished product.

Usage: This product has stable performance and is often made into potassium soap. It is used as an emulsifier for styrene-butadiene rubber, chloroprene rubber, nitrile rubber and its latex, ABS and other polymer polymers to improve and enhance rubber properties; it is also widely used in It can be used to manufacture water-soluble pressure-sensitive adhesives, which can also be used as ingredients, plasticizers, and binders for rubber components; as tackifiers for adhesives, etc.; it is also an important raw material for manufacturing chewing gum, advanced papermaking rubber, printing ink, etc. .

Safety of this product: This product is non-toxic.

This product is packed in galvanized iron barrels, with a net weight of 225kg per barrel. Avoid direct sunlight and rain, and be sealed and stored at low temperatures. During storage and transportation, attention should be paid to fire protection, heat protection, and moisture protection. Do not store and transport it together with pyrophoric substances, strong oxidants, and strong acids.

Inventory and inventory control: It is recommended to strictly control inventory at all times and pay attention to first-in, first-out. Pay attention to moisture-proofing. The storage and transportation period is half a year. Please control the inventory. If it is used beyond the storage period, please test it first and then use it.

Note: This information is for reference only and does not constitute a warranty statement that the company assumes legal liability. The company will make adjustments to relevant content without prior notice.