Colophong
Rosin
CAS: 85026-55-7
Molecular Formula: C15H20O6
Colophong - Names and Identifiers
| Name | Rosin |
| Synonyms | Rosin Colophong COLOPHONY WOOD ROSIN COLOPHONIUM FF WOOD ROSIN Colophony (Rosin) CHINESE GUM ROSIN HYDROGENATED ROSIN |
| CAS | 85026-55-7 |
| EINECS | 232-475-7 |
Colophong - Physico-chemical Properties
| Molecular Formula | C15H20O6 |
| Molar Mass | 296.32 |
| Density | 1.36 |
| Melting Point | 75-81 °C |
| Boling Point | 542.4±50.0 °C(Predicted) |
| Specific Rotation(α) | (c, 2.8 in CHCl3/MeOH 1:1)-44.8 |
| Flash Point | 180 °C |
| Solubility | Soluble in organic solvent, insoluble in water. |
| Appearance | White powder |
| pKa | 12.91±0.70(Predicted) |
| Storage Condition | 2-8℃ |
| MDL | MFCD23103373 |
Colophong - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 43 - May cause sensitization by skin contact |
| Safety Description | S24 - Avoid contact with skin. S37 - Wear suitable gloves. |
| WGK Germany | 1 |
| RTECS | VL0480000 |
| FLUKA BRAND F CODES | 10-21 |
| HS Code | 38061010 |
Colophong - Reference Information
| Plant Source: | Rhodiola rosea |
| Overview | Rosin is a natural resin known as "oil on trees", soluble in many organic solvents such as ethanol, ether, acetone, benzene, carbon disulfide, turpentine, oil and alkaline aqueous solution, but insoluble in water. Rosin is widely used in the fields of coating, ink, paint, adhesive, welding aid, rubber, paper making, food, additives and biological products due to its excellent characteristics of anti-corrosion, insulation and adhesion. Rosin industry is one of the four pillar industries of forestry in China, and its trade volume accounts for 60% of the world's total. However, the raw material Rosin itself has three shortcomings: 1) the crystallization tendency is large; 2) it is easy to be oxidized by oxygen in the atmosphere; 3) the acid value is high, which limits its application. In order to overcome the above shortcomings, Rosin needs to be modified. The modified rosin resin can not only improve the application performance of the product, but also improve the added value of rosin, domestic and foreign scholars have been devoted to the study of chemical modification and utilization of rosin. Rosin resin is a general term for a rosin or modified rosin derivative obtained by esterification of a carboxyl group with an alcohol under a certain temperature condition using rosin or modified rosin as a raw material. Rosin is a mixture of resin acids with a tricyclic phenanthrene backbone and a monocarboxylic acid containing two double bonds. According to its different positions of double bonds, can be divided into two categories: very acid resin acid and pimaric acid resin acid, the former content is generally 70% -80%, the latter content of 10%-20%. Very acid resin acid has active double bonds, easy oxidation, resulting in unstable properties of rosin. In addition to Resin acid, Rosin has two mushroom alcohol, two mushroom aldehyde, two mushroom ENE and other neutral substances, the content of about 10%, these neutral substances will affect the use of rosin characteristics, especially electrical properties. Therefore, in order to make high stability Rosin resin, we must first change the structure of the double bond of rosin Resin acid, and remove the neutral substance, and use the reactive groups such as carboxyl group and conjugated double bond in the molecular structure of rosin, further processing products such as polymerized rosin, disproportionated Rosin, hydrogenated Rosin, maleic Rosin and various rosin esters were obtained by addition reaction. 1 Rosin resin |
| Quality Index and application performance | 1. Rosin resin for Flux: The Quality Index of rosin resin for flux is shown in Table 2. Resin for pre-coating agent of printed circuit board: The Quality Index of resin for pre-coating agent of printed circuit board is shown in Table 3. Resin for thermal fuse: See Table 4 for the quality index of resin for thermal fuse. Resin for hot-melt adhesive: see table |
| preparation process | Method 1: Rosin isomerization method is used to eliminate the conjugated double bond structure of resin acid, through the purification process and post-treatment process to remove the neutral substances, and through the local esterification process, further improve the stability of the final product. For the high stability Rosin resin used in electronic industry, due to the high requirement of electrical properties, it is not enough to rely solely on the modification of rosin itself, so the compound process is increased, and a small amount of additives is added, the final product quality to meet the overall requirements of the electronics industry. The process flow is as follows: Method 2: rosin is pretreated by steam distillation, vacuum steam distillation and vacuum distillation to obtain refined Rosin, and then subjected to esterification reaction, vacuum distillation to obtain colorless Rosin resin product. 1) Pre-treatment of pine gum: Enter the pine gum in the pine gum pool into the dissolving pan with a screw conveyor, add oxalic acid and heavy oil according to the amount of pine gum, heat, melt the pine gum, filter it, put it into the clarifying pan and let it stand still, moisture and impurities in the lower layer were separated and removed. 2) steam distillation: the upper lipid liquid is sent to the distillation pan for distillation. Firstly, the atmospheric steam distillation is adopted at a temperature of 150 ℃ for 3H, and then the vacuum steam distillation is adopted at a temperature of 150 ℃, time 2h gas was separated from oil and water by condensation cooling, and the oil and heavy oil in the oil were collected respectively. The liquid was Rosin. 3) Rosin refining: Rosin abietic acid resin acid under the action of heat or acid, easy to isomeric reaction Resin acid boiling point is very high, and under certain conditions, when the temperature exceeds 150 ° C., thermal isomerization reaction is likely to occur, and when the temperature exceeds 250 ° C., cracking reaction is likely to occur. Therefore, in order to reduce the boiling point temperature of the refined Rosin, the lower the distillation pressure, the better. 4) esterification reaction: the composition of rosin Resin acid is mainly abietic acid type Resin acid, different from the general carboxylic acid, the carboxyl group of rosin is located on the quaternary carbon atom, and the steric hindrance is very large, the reaction requires high activation energy, and its carboxyl esterification is difficult. The esterification requires high temperature (250~300 ℃) for a long time (6~11H) and high activity catalyst to make the reaction proceed smoothly, but the temperature is too high, the time is too long to cause the rosin product cracking, easy oxidation polymerization and affect the yield and quality of the product. In order to make the esterification reaction is complete and to obtain excellent performance of esterification products, attention should be paid to the influence of esterification reaction temperature, time, catalyst and the amount of solubilizing agent dosage, raw materials, feeding ratio, mixing time, the control of the vacuum distillation time and other processes. |
| Application | 1. Flux: for electronic circuit board effect is good, with stable performance, good electrical properties and other characteristics, such as hydrogenated Rosin and polymerized rosin as film-forming resin can be used for the preparation of flavor solder paste, when the mass fraction of rosin in flux is in the range of 20% ~ 60%, the spreading property of solder paste, the morphology of solder joint and the ability of anti-collapse can be improved by increasing the content of rosin; when the total mass fraction of rosin in the flux is 40%, the spread test of the solder paste with different proportions of rosin shows the characteristics of full solder joints, bright surface and regular periphery, and the spread rate is basically equivalent, it is about 82%, and the anti-collapse performance of solder paste increases with the increase of the proportion of polymerized rosin. 2. Printed circuit board pre-coating agent: Rosin resin used for printed circuit board pre-coating agent has the characteristics of fast drying, good oxidation resistance, non-corrosive, and alcohol soluble rosin-based flux has good compatibility. 3. Water-soluble ink: a water-soluble fumaric acid modified rosin resin that meets the requirements of domestic ink manufacturers. The water-soluble fumaric acid modified rosin resin can be used alone as a water-based ink binder, it can also be used as a binder in combination with acrylic copolymer resin. The price is low, which can meet the development demand of the current ink market and has a good application prospect. 4. Tackifier: rosin, as a tackifying resin, is widely used in the production of pressure sensitive adhesive (SPA) due to its low price and excellent fast adhesion. The pressure sensitive adhesive is coated on the film substrate to produce various instant adhesive and non-dry adhesive tape products, it is widely used in production and people's daily life. (2016-6-13) |
| biological activity | Rosin was isolated from a pine or pine stump, rosin is a frequently contacted allergen that can cause allergic contact dermatitis. |
| Use | for content determination/identification/pharmacological experiments. |
Last Update：2024-04-09 21:01:54
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Tel: +86-17551318830
Email: r@reformchem.com
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QQ: 3787852685
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Product Name: Rosin Request for quotationCAS: 85026-55-7
Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3785839865
Product Name: Rosin Request for quotation
CAS: 85026-55-7
Tel: 17505222756
Email: pules.cn@gmail.com
Mobile: +86-17551318830
Wechat: 17505222756
CAS: 85026-55-7
Tel: 17505222756
Email: pules.cn@gmail.com
Mobile: +86-17551318830
Wechat: 17505222756
Spot supply
Product Name: Rosin Visit Supplier Webpage Request for quotationCAS: 85026-55-7
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
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