1、Colophony: Rosin in Unmodified and Modified Form

Colophony (rosin) is the non-volatile fraction of the oleoresins from coniferous trees, mainly pine trees. The composition varies depending on the source but also on the way it is produced. There are three types of rosin based on the way of recovery: gum rosin, wood...

2、Pine Gum Rosin Vs. Pine Rosin: Understanding the Differences

The differences between pine rosin and pine gum rosin are reflected in their applications. Due to its higher purity, pine gum rosin is preferred in applications where the specific properties of the rosin are critical to the performance of the final product.

3、Colophony vs. Rosin

(12) Patients with suspected allergy to colophony were patch-tested with colophony (rosin) of different kinds (gum rosin, tall oil rosin). (13) Relatively fewer dermatitis patients reacted to the neutral fraction compared with reactions to the unfractionated gum rosin when patch tested.

Gum Rosin in Medical and Pharmaceutical Applications: From Conventional

Abstract Gum rosin and its derivatives have been used traditionally in coatings and adhesives and are now increasingly applied in diverse medical and pharmaceutical fields. Owing to its film-forming ability, hydrophobic nature, biocompatibility, and ease of chemical modification, gum rosin has emerged as a promising excipient for controlled drug release, targeted drug delivery, and other ...

Technical Article – Gum Rosin

Rosin is also called colophony or Greek pitch, is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. It is semi-transparent and varies in color from yellow to black. At room temperature rosin is brittle, but it melts at stove-top temperature. It chiefly consists of various ...

The Chemistry of Gum Rosin

1、Gum Rosin in Medical and Pharmaceutical Applications: From Conventional Gum rosin, also known as rosin or colophony, is a natural, renewable resin obtained from the distillation of pine sap. Chemically, gum rosin consists primarily of resin acids (about 90–95%), predominantly abietic acid and its isomers, along with neutral compounds (resenes) [1, 2].

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gum rosin and is still considered to be the major sensitizer in colophony. Various aller-genic compounds are also created in chemical modi cation processes performed to obtain fi improved technical rosin products. One of those is maleopimaric acid which is a strong contact allergen present in commonly used modi ed rosins. Studies on the ...

doi: 10.1007/978

Colophony (rosin) is the non-volatile fraction of the oleoresins from coniferous trees, mainly pine trees. The composition varies depending on the source but also on the way it is produced. There are three types of rosin based on the way of recovery: gum rosin, wood rosin, and tall oil rosin. Rosin is present in unmodied and mod-

CHAPTER 64 Colophony

Colophony (rosin) is a resin obtained from different species of coniferous trees. There are three types of colophony, depending on the method of recovery: gum rosin, wood rosin and tall-oil rosin.

Colophony

Colophony (rosin) is a resin obtained from different species of coniferous trees. There are three types of colophony, depending on the method of recovery: gum rosin, wood rosin and tall oil rosin. Gum rosin is obtained from various species of living pine trees. The...

In ancient times, two remarkable substances—gum rosin and colophony—were utilized by humanity for diverse purposes. Despite both originating from natural resins, they exhibit significant differences. This article explores these distinctions and analyzes their impact on technological and cultural development.

1. Chemical Composition and Structural Differences

1. Gum Rosin

• Gum rosin is a resin secreted by plants, primarily composed of unsaturated fatty acids and polyols. Over time, it undergoes natural polymerization and solidification, forming a hard, solid material.
• Its complex structure contains multiple functional groups, endowing it with excellent adhesive properties and water resistance.
• With a larger molecular weight, gum rosin remains solid at room temperature, flowing only when heated.

2. Colophony

• Colophony, derived from coniferous trees like pines, also consists of unsaturated fatty acids and polyols. its smaller molecular weight makes it liquid at room temperature and highly fluid.
• Its shorter molecular chains result in greater fluidity and solubility.
• Under high temperatures, colophony decomposes, releasing volatile compounds, which account for its distinctive odor.

2. Physical Property Differences

1. Gum Rosin

• At room temperature, gum rosin is solid, characterized by hardness and brittleness. This requires specialized processing (e.g., cutting, sanding) for product manufacturing.
• Its higher molecular weight leads to a higher melting point, limiting its use in thermoplastic materials.

2. Colophony

• Colophony is liquid at room temperature, offering superior fluidity and plasticity. This facilitates molding and shaping in manufacturing.
• Its lower melting point and ease of processing make it widely applicable in thermoplastic materials.

3. Application Differences

1. Uses of Gum Rosin

• Due to its adhesive and waterproof properties, gum rosin is commonly used as a wood adhesive and in waterproof coatings for construction and furniture.
• Its high melting point and brittleness also lend value in niche, high-end product manufacturing.

2. Uses of Colophony

• Colophony’s fluidity and plasticity make it a key ingredient in industries such as plastics, rubber, and paints.
• Its versatility in thermoplastic materials has cemented its role as an essential raw material in these fields.

4. Environmental Impact Differences

1. Gum Rosin’s Environmental Effects

• Gum rosin production may involve fossil fuels, contributing to environmental burdens.
• Its high melting point and brittleness can hinder full recyclability, posing additional environmental challenges.

2. Colophony’s Environmental Effects

• Colophony production typically avoids fossil fuels, reducing its environmental footprint.
• Its recyclability allows for chemical conversion into other useful products, enabling resource circularity.

Though derived from the same natural resin category, gum rosin and colophony differ markedly in chemical composition, physical properties, applications, and environmental impact. These distinctions not only reflect their unique characteristics but also enrich technological and cultural advancements. By understanding these differences, we can better leverage their strengths to drive progress and prosperity.