مواد مجموعة تكنولاب البهاء جروب لغسيل السيارات(الغسيل الجاف)

Car Drying Aids

[ltr]مجموعة تكنولاب البهاء جروب[/ltr]

[ltr]عميد دكتور[/ltr]

[ltr]بهاء بدر الدين محمود[/ltr]

[ltr]استشارى كيميائى[/ltr]

01229834104

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]After the car is washed in an automatic car wash, it is sprayed with rinse/drying aid. [/b]

[ltr]The main purpose of this aid is to bead up the remaining water on the car surface so it can be easily removed by the blast of air. [/ltr]

[ltr]The "beading up" of water is caused by the accumulation of small water droplets into a large bead. [/ltr]

[ltr]The product that forces the water to form beads is not a true wax; it is a mixture of quat and mineral seal oil. [/ltr]

[ltr]The formation of beads of water on a car surface is generally accomplished by a microemulsion of mineral seal oil in water formed with the help of a quat. [/ltr]

[ltr]A common formula for this so-called hot wax or drying aid is shown here.[/ltr]

[ltr]Hot Wax[/ltr]

[ltr] [/ltr]

[ltr]Ingredients % Wt.[/ltr]

[ltr]Dicocodimonium chloride 20.0[/ltr]

[ltr]Mineral seal oil 25.0[/ltr]

[ltr]Glycol ether EB 5.0[/ltr]

[ltr]Water 50.0[/ltr]

[ltr]Preservatives, dyes q.s.[/ltr]

[ltr]------------------------------------------------------------------------------------------------[/ltr]

[ltr]The dicocodimonium chloride creates a microemulsion of mineral seal oil in water. [/ltr]

[ltr]This microemulsion is a dispersion of droplets of oil in the water. [/ltr]

[ltr]Thedroplet size is so small that the light passes through them and does not get reflected back, which is why it appears as a clear solution rather than a dispersion. [/ltr]

[ltr]Macroemulsions such as skin care creams and lotions are also dispersions of fats, oils and waxes in water but here the oil droplets that are dispersed in water are much larger than the droplet size in a microemulsion.[/ltr]

A macroemulsion such as a skin care lotion appears white because the light does not pass through and gets reflected back.

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]The hot wax formula for drying aids also includes glycol ether. [/b]

[ltr]Glycol ether provides the required solubilization and HLB to create the microemulsion. [/ltr]

[ltr]Sometimes the formula also needs a nonionic surfactant. Preferred surfactants are ethoxylated amines such as cocoamine with five moles of ethylene oxide. [/ltr]

[ltr]Therefore another formula can be made as follows.[/ltr]

[ltr]Hot Wax[/ltr]

[ltr] [/ltr]

[ltr]Ingredients % Wt.[/ltr]

[ltr]Dicocodimonium chloride 20.0[/ltr]

[ltr]Mineral seal oil 25.0[/ltr]

[ltr]Glycol Ether EB 5.0[/ltr]

[ltr]Exothylated cocoamine 2.0[/ltr]

[ltr]Water 48.0[/ltr]

[ltr]Preservatives, dyes q.s.[/ltr]

[ltr]---------------------------------------------------------------------------------------------------[/ltr]

[ltr]Drying aids form a thin, nearly invisible layer of quat and mineral seal oil on the car's surface. [/ltr]

[ltr]The quat molecules tend to attach themselves to the surface and bring the mineral seal oil with them to form an efficient hydrophobic layer. [/ltr]

When water comes in contact with this layer it immediately gets repelled and forced to stick together rather than stick to the car surface, which makes water bead off.

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]The quat causes a reduction in surface tension. [/b]

[ltr]Addition of nonionic surfactants causes further reduction in surface tension; thus the nonionic helps sheet the water off the car.[/ltr]

[ltr] Nonionic surfactants such as nonylphenol ethoxylates or alcohol ethoxylates can be used, but they wash away part of the quat. [/ltr]

[ltr]Ethoxylated amines are more compatible with quats due to a pseudo-positive charge on the nitrogen (created by the shift of electrons) in ethoxylated amines. [/ltr]

[ltr]All of our test results point to the fact that ethoxylated amines work much better than other nonionics in this application. [/ltr]

[ltr]Here are three car drying/rinse aid starting formulations in premium, standard and economy qualities:[/ltr]

[ltr]Premium Quality[/ltr]

[ltr]Ingredients % Wt.[/ltr]

[ltr]Dicocodimonium chloride 18.0[/ltr]

[ltr]Exothylated cocoamine 2.0[/ltr]

[ltr]Glycol ether EB 5.0[/ltr]

[ltr]Mineral seal oil 25.0[/ltr]

[ltr]Water 50.0[/ltr]

[ltr]Preservatives, dyes q.s.[/ltr]

[ltr]------------------------------------------------------------------------------------------------------[/ltr]

[ltr]Standard Quality[/ltr]

[ltr]Ingredients % Wt.[/ltr]

[ltr]Dicocodimonium chloride 13.6[/ltr]

[ltr]Exothylated cocoamine 2.4[/ltr]

[ltr]Glycol ether EB 3.0[/ltr]

[ltr]Mineral seal oil 20.0[/ltr]

[ltr]Water 61.0[/ltr]

[ltr]Preservatives, dyes q.s.[/ltr]

[ltr]-------------------------------------------------------------------------------------------------------[/ltr]

[ltr]Economy Quality[/ltr]

[ltr]Ingredients % Wt.[/ltr]

[ltr]Dicocodimonium chloride 9.0[/ltr]

[ltr]Exothylated cocoamine 3.0[/ltr]

[ltr]Glycol ether EB 2.0[/ltr]

[ltr]Mineral seal oil 14.0[/ltr]

[ltr]Water 72.0[/ltr]

[ltr]Preservatives, dyes q.s.[/ltr]

[ltr]------------------------------------------------------------------------------------------------------[/ltr]

Adding silicone quats to the formula will enhance the beading and sheeting action, as well as cause quick breaking of foam and will help leave a shine on the car while protecting the surface.

[ltr]Here's a sample starting formula:[/ltr]

[ltr]Car Drying / Rinse Aid Premium Quality[/ltr]

[ltr]Ingredients % Wt.[/ltr]

[ltr]Dicocodimonium chloride 18.0[/ltr]

[ltr]Exothylated cocoamine 2.0[/ltr]

[ltr]Silicone quat 3.0[/ltr]

[ltr]Glycol ether EB 5.0[/ltr]

[ltr]Mineral seal oil 25.0[/ltr]

[ltr]Water 47.0[/ltr]

[ltr]Preservatives, dyes q.s.[/ltr]

[ltr] [/ltr]

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[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]Troubleshooting [/b]

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]The standard procedure for making the formulas found in this article is to add all ingredients in the order listed except water.[/b]

Mix well and make sure that the batch is homogenous and smooth, free of lumps or particles,

before adding water. Add water slowly with good agitation.

The mixer must be able to create a vortex.

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]A variety of problems can be encountered when making a car drying/rinse aid formula.[/b]

Cold weather adds to the problems since emulsions in general,

and microemulsions in particular, are sensitive to low temperatures.

Order of addition as well as speed of mixing is important to create a crystal-clear batch.

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]Mineral seal oil (MSO) quality is an important factor.[/b]

Mineral seal oils are mixtures of aromatic and aliphatic hydrocarbons and their ratios vary from supplier to supplier and from batch to batch.

Recent increases in crude oil prices may have caused some alterations in the quality of mineral seal oil.

The quality and hardness of water is another variable.

Hard water that contains calcium and magnesium can cause variations in the formulation.

Order of addition,

speed of addition and mixing equipment are also important factors.

When making a batch,

it is recommended to add MSO,

quat and glycol ether and mix them very well.

The mixing equipment must be able to create a vortex and bring the bottom part of the mixture to the top;

otherwise, a portion of the quat can stay at the bottom.

The water should be added slowly with constant mixing.

Whenever the batch does not turn out clear there are some adjustments that should be made. Here are a few examples:

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]* Add more quat. As discussed earlier, the quality of MSO can vary.[/b]

If the MSO has more aliphatic material, it will take more quat to emulsify.

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]* Add more EB. Some batches take a little more EB to make the microemulsion. [/b]

[b style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 13px;"]* Add exothylated cocoamine.[/b]

The addition of 1-2% exothylated cocoamine also helps.

If the viscosity of the batch is higher or there is a gel formation,

add 0.5% of betaine.

Occasionally, the addition of 2-5% propylene glycol will also help dissolve any precipitation.

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