The paraffin content in my country's oil is higher than that of other countries in the world. After 300 ℃, the average wax content of the distillate in my country is as high as 80%, while the wax content of Middle East Petroleum and American oil after 300 ℃ is only 50% and 50% respectively. 30%. Therefore, my country has exported a large amount of paraffin wax since the 1960s when it began to exploit and process oil on a large scale. In recent years, the demand for scented candles in developed countries in Europe and the United States has increased greatly. For example, the United States consumes nearly 3 billion US dollars of scented candles every year. Due to the cheap price of paraffin wax in my country and the relatively low price of labor, these countries have switched from importing paraffin wax to my country to process candles by themselves to directly buying candles from my country, most of which are scented candles.
The consumption of scented candles in my country is still very small, and the large-scale production (mainly for export) is only a matter of recent years. The scenting of candles has not attracted enough attention from the fragrance industry. When the candle factory went to the fragrance factory to buy fragrance, the sales department of the fragrance factory casually gave away a few bottles of daily chemical or fragrance samples, and let the candle factory do the "fragrance experiment" by itself, which is not normal. It should be noted that the fragrances used in each industry have their own characteristics and requirements, and candle fragrances are no exception.
At present, the common problems reported by candle manufacturers when using fragrances are:
1) The essence does not dissolve well in the paraffin, so there are turbidity, precipitation, and the essence floats or sinks. Strong stirring makes it reluctantly mixed. After cooling, the upper and lower layers of the candle are different, or "sweat". There are bubbles and Visible impurities, etc.;
2) The white candle will change color after adding fragrance, and the colored candle with dye will appear uneven dyeing, and the color will not be bright;
3) The fragrance is not stable, it does not penetrate the hair, and the fragrance does not last long...
To explain these phenomena, we must start with the analysis of the chemical composition of paraffin.
The main component of paraffin wax is n-alkane. The extremely pure n-alkane is colorless, odorless, transparent or translucent. It will not change color or deteriorate when exposed to the atmosphere for a long time. However, the commercially available paraffin cannot be 100% n-alkane. Contains a small amount of naphthenic hydrocarbons, isoparaffins, aromatic hydrocarbons, unsaturated hydrocarbons, trace amounts of iron, sulfur, nitrogen and other inorganic impurities, these impurities can make paraffin with "paraffin smell" and color (especially long-term exposure to the air color gradually gradually Deepening), lowering the boiling point, and more importantly, it will chemically change with various fragrances in the essence or catalyze the chemical action of various ingredients, resulting in changes in aroma and color changes and instability after perfuming.
Normal paraffins are standard "oils", non-polar. Therefore, the more hydrophilic substances are, the more difficult it is to dissolve in n-alkanes. Among the common fragrance monomers, most esters and terpenes are easily soluble in n-alkanes; alcohols, aldehydes, ketones, acids, ethers, and heterocyclic compounds are difficult to predict. Generally, the longer the carbon chain (such as n-octane) Aldehyde to n-hexadecaldehyde) is more soluble, single ring without long side chain (such as phenylethyl alcohol, phenylacetaldehyde, phenylacetic acid, benzyl alcohol, phenylpropanol, phenylpropanal, cinnamyl alcohol, cinnamaldehyde, nitrate base musk, coumarin, vanillin, jasmine aldehyde, methyl amyl cinnamaldehyde, anisaldehyde, p-methoxyacetophenone, eugenol, isoeugenol, naphthyl methyl ether, etc.) in n-alkanes The solubility of the water is relatively small, most of them can only dissolve about 1%, and some are even lower than 0.1%. The solubility of common fragrances in oils (n-alkanes) is listed in Table 1 for reference.
The solubility of various fragrances in oil (n-alkanes) is the most important reference data when formulating fragrances for candles: in a fragrance formulation, if you use a lot of insoluble (in oil) fragrances, when adding this fragrance to the When in the molten paraffin, these insoluble spices will inevitably precipitate or be suspended in the paraffin, and after cooling, there will be phenomena such as stratification and "sweating". This formula is a failure. However, this does not mean that these insoluble fragrances cannot be used to formulate candle fragrances at all, but that the amount of these fragrances used in candle fragrances should be controlled within a certain range. Some special scented candle fragrances, such as the very popular "vanilla" fragrance in Europe and the United States, inevitably use a lot of vanillin and ethyl vanillin, coumarin, jasmine aldehyde, etc., which requires a lot of experiments. , these poorly soluble fragrances are first dissolved in ester or terpene fragrances with lower aroma intensity, and they are "brought in and dissolved" in paraffin.
Like soap essences, fragrances used to make white candles should use as little color-changing fragrances as possible, such as indole, anthranilates, phenols, quinolines, vanillin, and ethyl vanillin. If it has to be used in large quantities, it should be noted that iron drums cannot be used for packaging, and the candle manufacturer should be informed that "the essence is easy to change color" and should not be used for manufacturing White candles, even if they are used to produce colored candles, must use paraffin wax with higher purity to avoid contact with iron during production. The compatibility with dyes must be tested first and observed after a long period of "frame test".
The fragrance recommended to the candle manufacturer is best to do a "fragrance experiment" in the fragrance factory. In fact, the candle fragrance experiment is the easiest and simplest experiment, unlike other fragrance fragrance experiments that require special equipment: first, ask the candle manufacturer for the paraffin and dye used by the factory, and heat the paraffin to a temperature above the melting temperature of 20 -30 degrees Celsius, after adding the dye and stirring to dissolve, add the flavor sample according to the process requirements, stir and observe the dissolution. Rack test experiment (sunlight, ultraviolet radiation, heat resistance, cold resistance, observe the changes in color and aroma and record them in detail); if the dissolution is not good or the phenomenon of delamination, uneven color, sweating, etc. occurs after cooling, it means that the essence There is a problem with the recipe and needs to be reconstituted.
It can be seen from the above "fragrance experiment" that the fragrance of candles is carried out at a higher temperature (the temperature during factory production is higher, often higher than 100 ℃). Therefore, the low-boiling point fragrance in the formula of the special fragrance for candles should be Use as little as possible, otherwise the high temperature of melting paraffin will cause these low-boiling-point spices to volatilize, which will not only waste the spices but also affect the aroma; it is also very unsafe to use the flavors with too many low-boiling-point spices.
According to the current classification method, candle fragrances should belong to the category of environmental fragrances. The commonly used fragrance types are: vanilla, cinnamon, citronella, jasmine, rose, lilac, sunflower, gardenia, lily, lily of the valley, carnation, gold Acacia, daffodils, apples, bergamot, bananas, cherries, strawberries, raspberries, sandalwood, ambergris, cologne, Fuqi, Suxinlan and other floral, fruity, woody fragrances that have been widely popular Fragrance type and some popular "fantasy type" fragrances in recent years, the preparation of these fragrance type fragrances can refer to the "basic formula" of general daily chemical fragrances, pay attention to the fragrances that are not soluble in oil if the dosage is large, try to use them Substitute for soluble fragrances with similar aroma. If you can't find substitutes, increase the amount of esters with less aroma. For example, in the preparation of vanilla essence, use more benzyl benzoate and diethyl phthalate, both as pandan It can also be used as a solvent for solid fragrances such as vegetarian and can also be dissolved in paraffin with these fragrances.
The melting point of paraffin wax used for candles is generally about 58°C, and the addition of fragrance will reduce the melting point. Generally, the amount of fragrance added is about 2%, and the melting point will drop by several degrees Celsius. Therefore, it is required that the fragrance of the special fragrance for candles should be more transparent and stronger (the fragrance ratio is more than 100). If the incense ratio is low and the aroma is dull, the candle factory has to increase the amount of fragrance, which will cause the melting point of the finished candle to drop too much and fail to meet the export requirements. If the melting point is too low, the candle will be deformed, and even stick to a large piece in severe cases, which is a great loss.
Some unscrupulous businessmen artificially add a large amount of unscented solvent to the fragrance to dilute and sell them in order to covet high profits. The candle factory has to increase the amount of fragrance when using it. This is also one of the reasons why some candle factories cannot produce high-quality scented candles.
"Jelly wax" is made by dissolving polymer resin in white mineral oil at high temperature and cooling, and the main matrix is n-alkane with slightly smaller molecular weight. Therefore, "jelly wax" is similar to the fragrance used in ordinary candles. It is also required to use less oil-insoluble fragrances in the fragrance formula to prevent the fragrance from being poorly dissolved, resulting in turbidity, precipitation or unclear suspension, which affects the appearance. "Jelly wax" products are generally very bright, transparent, and dazzling, so the requirements for flavors are higher, and it is better not to use flavors that are prone to deterioration and discoloration.
FAQ
Do you export candle fragrance in canada?
Yes,we only export to canada but export to USA.
What is the function of candle fragrance？
It will give best smell in the candle,and make good feeling.
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