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Mixer for Blending CaCo3 with Latex

02/02/2014 6:44 PM

I am looking for people familiar with blending latex with calcium carbonate. The latex will be around 50 to 65%. There will be add thickener and some other additives but is very small amount. My goal is to achieve a creamy homogeny mix. I was thinking to use inline high shear emulsifier and recirculate the mix to the tank. Also add paddle or propeller shaft in the tank to help disperse the calcium carbonate. Thanks

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#1

Re: Mixer for blending CaCo3 with latex

02/02/2014 6:52 PM

More information will be required.

50 to 65% what? Volume? Weight? What?

What's the viscosity of the latex?

Particle size of the powder?

Additives?

Really we can't read your mind, and you are obviously not prepared to provide useful information.

Go back to the drawing board, get all the information you need to make a proper presentation and then come back.

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#2
In reply to #1

Re: Mixer for blending CaCo3 with latex

02/02/2014 7:20 PM

The total batch is 1000 gallon (3800 L)

Latex is viscosity 1000 cps. 60% by weight

CaCo3 is 5 um about 40% by weight

Thickener is about 0.03%

other additive is colorant, biocide is very little.

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#3
In reply to #2

Re: Mixer for blending CaCo3 with latex

02/02/2014 7:40 PM

Thickener is fumed silica, or what?

"paddle or propeller shaft in the tank to help disperse the calcium carbonate?"

Is this your first compounding project?

Maybe you should read a book on compounding.

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#4
In reply to #3

Re: Mixer for blending CaCo3 with latex

02/02/2014 7:46 PM

The thickener is anionic carboxylated styrene-butadiene copolymer alkali swellable latex thickener.

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#6
In reply to #4

Re: Mixer for blending CaCo3 with latex

02/02/2014 8:05 PM

OK, do you have the equipment to do this?

Have you ever done this before?

Do your raw material suppliers have any advice?

This doesn't seem to be that difficult, even if you have never done it before.

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#14
In reply to #2

Re: Mixer for blending CaCo3 with latex

02/03/2014 12:04 AM

West-

The predominant way of doing this is like paint and some adhesives are made. Start out with vessel at least twice as high as it is wide (tank or reactor, which ever name you prefer) and charge it with part of the liquid of the batch size. Add the solids while the mixture is being agitated/emulsified with a high speed (the highest obtainable for that material) emulsifying agitator blade on it. The more blades the betters. Run this as fast as possible without entrapping a lot of air. Run this as the solids are gradually charged into the agitation liquids. When you have reached the point where all the solids have been added and the minimum amount of liquid have been charged agitate the resultant slurry for several hours or an appropriate length of time. Then take a viscosity test. If this work in process test is good then add more liquids up to 90-95% of the total liquid to be charged. Add your thickeners, agitate and retest viscosity. The viscosity should be higher than desired. Adjust the high viscosity by lowering it with adding more liquids to the batch. Agitatation it done through all these steps. You can then predict the amount of additional liquids needed by past history and extrapolation after a history has been generated. What ever you do try to not lower the viscosity below the desired viscosity. It is much easier to lower than it is to increase it. When the desired viscosity is reached STOP! You now have the finished product you want.

This is a basic method of making your type of product. The extremely important parts are the emulsification of the concentrate, providing agitation always and final adjustments with the mix viscosity.

There are many high solids products that are made with this system. Some are wall paper paste, adhesives, wood fillers, paints, ceiling tile adhesives, molded products raw materials, etc.

Good Luck, Old Salt

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#15
In reply to #14

Re: Mixer for blending CaCo3 with latex

02/03/2014 12:32 AM

Old Salt, Thank you for all the advices. West

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#5

Re: Mixer for blending CaCo3 with latex

02/02/2014 8:04 PM
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#7
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Re: Mixer for blending CaCo3 with latex

02/02/2014 8:22 PM
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#8
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Re: Mixer for blending CaCo3 with latex

02/02/2014 8:40 PM

I am new to this, is sometimes hard to ask a supplier before you doing business with them. So I try to get as much information as possible under my belt. So I can ask them easier. Thanks for all your help.

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#9
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Re: Mixer for blending CaCo3 with latex

02/02/2014 9:13 PM

This should have been in your OP. (original post) More helpful responses would have been given to you, if the fact that this was your first attempt had been known. There are people here who can help you.

Versatile Batch Mixers - Mix, Emulsify, Disperse, Dissolve‎


Talk to at least 3 equipment suppliers and tell them what you are trying to do. Write a request for quote for batch paint mixers, even if you don't know all the details. They will help you, because they want to sell you equipment.

The Super Bowl may hinder responses tonight.

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#10
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Re: Mixer for blending CaCo3 with latex

02/02/2014 9:37 PM

Super what??

Looks like a super walkover so far!

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#11
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Re: Mixer for blending CaCo3 with latex

02/02/2014 9:39 PM

Worst "football" game I've ever seen.

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#12
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Re: Mixer for blending CaCo3 with latex

02/02/2014 10:07 PM

......DOMINATION.....

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#13
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Re: Mixer for blending CaCo3 with latex

02/02/2014 10:17 PM

It's easy to dominate when only one team shows up to play.

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#16

Re: Mixer for Blending CaCo3 with Latex

02/03/2014 10:37 PM

You should talk to multiple vendors to get multiple solutions. One solution to consider for creating thick, viscous slurries is continuous blending.

The ingredients are metered at the correct proportions into the continuous blender in a steady-state condition. The blender will only be sized to handle 30-seconds of material, instead of capacity to hold the entire batch. This will greatly lower the floor space and HP requirements for the blender.

This blender manufacturer offers free feasibility tests at their lab in York PA.

http://www.readco.com/continuous-mixing.html

http://youtu.be/g9arsJQoCEc

What is the process usage of the blended material (how long will it take to consume the 1000 gallons?)

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Delmar (1); Just an Engineer (1); lyn (6); old salt (1); SolarEagle (3); West (4)

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