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Automotive Cockpit Shine Spray Issue
I am working on a Car Dashboard Shine formulation based on HEC and Silicone Emulsion. The performance is quite good. However, when sprayed, the shower gun emits a stream of the fluid instead of spraying. I have tried various viscosities with HEC (0.4 - 1.0%) but no success. The other ingredients are Glycerin, TEA, preservative, fragrance and water.
I shall appreciate if anyone out there could help me out.
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4 Replies
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Have you tried it without HEC? Is the HEC added for “cling” on the dashboard surface or for another reason?
You could also try different spray heads on your bottle.
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Yes, I have tried Xanthan gum and HPMC. They have same results. I sticked to HEC because of ease of processing.
Yes, HEC is added for thickening and for “clinging” on the dashboard surface.
Already have tried different spray heads, same results. -
Without thickener, the blend has almost water like viscosity which can easily be sprayed with any spray head.
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agree any polymer is going to give you issues with fine spray unless you get a nozzle to overcome some of that or reduce the level. You could try diutan or gellan gum though- diutan is more shear-thinning than xanthan and you could likely use it at ~60% your xanthan use level. Not sure the pH of a product like this but if you are heating the formulation you could try ~0.1% or less of high acyl gellan (hydrates at ~85C) or use low-acyl gellan gum at a a similar concentration (there are some other processing considerations with that though such as presence of ions).
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