TYTAN'S RANGE OF WETTING AND DISPERSING AGENTS
Wetting agent:
	TYSPERSE
Dispersing agent:
	TYTAN - DNT
	TYTAN - NCI
	TYTAN - NCK
	TYTAN - NCH
Wetting cum Dispersing agent:
	TYTAN - TPS
	TYSPERSE - DN
	TYSPERSE - CN
Single or a blend of the products can be used to get the desired wettability and suspensibility. Each of these chemicals is designed to give the Wetting and dispersing powder (WDP) formulations functional properties in pesticide spreading system.
WETTABLE POWDERS ARE USED IN PESTICIDE FORMULATIONS TO:
	Stabilise the formulation
	Maintains even dispersion
	Improves wetting, adhesion and penetration
	Have an effective working even at low concentration
FEATURES OF TYTAN WETTING AND DISPERSING PRODUCTS:
	Low foam
	Low c.m.c. Value of products that leads to a low dosages in order to get desired wettability and suspensibility
	Anionic based wetting and dispersing agents
	It has excellent stability in hard water
	Multiple system options can be chosen to get a broader range of effective ratio
	Provides Workability for a broader range of pesticide WDP formulations like Isoproturon, Sulphur, Carbendezim, Atrazin, Lindane, DDT, Malathion, Acephate, Metribuzin, Metalaxyl, etc.
TOPL also offers technical support for working on application development for pesticide formulations. TOPL has a basic research laboratory facilities with modern instruments and highly skilled technical support team to provide technical assistance.
Based on our experience of formulating pesticide wettable powders, this brochure describes how TOPL products can be used to improve pesticide WDP formulations and performance.
WETTABLE POWDER:
WDP powders of pesticides are designed to form a suspension when it is added to water. WDP is a complex blend formulation of various heterogeneous ingredients like:
	Pesticide technical
	Wetting and dispersing agent
	Inert fillers
	Other additives like stabilisers, thickeners, etc.
WDP's should have an average particle size much below 75 microns. This can be achieved by milling of various components. These components must have high melting point to avoid melting during milling and storage.
DISPERSION:
When particles in suspension come close to each other, their mutual attraction overcomes any repulsive forces, recombination occurs and the particles stick together either by flocculation or by high agglomeration.
Dispersants act by two-mechanisms viz., electrostatic and steric stabilisation. It adsorbs on the particle surface creating a barrier between particles thus reducing particle-to-particle interaction.
TOPL has a comprehensive range of dispersants based on different polymer size that helps to create a physical barrier between the particles to produce an electrostatic stabilisation to the system.
TOPL's dispersants are added to increase the charge on the particles. This increases the net negative charge on the particle surface creating repulsion and stabilising the dispersion. Hence TOPL's anionic dispersant are framed to disperse the system by electrostatic repulsion.
FORMULATION OF WETTABLE POWDER:
FORMULA:
	Active Ingredient : X %
	Wetting agent : Y %
	Dispersing agent : Z %
	Inert Filler : Make it to 100 %
PROCESS :
The technical should either be pre-milled or adsorbed on carrier, then the other ingredients shall also be mixed thoroughly. Preparation of wetting and dispersing agents are altered to optimise the formulation for a wetting, suspensibility and other properties. The whole mixture is then grounded in an Air Compressed Mill (ACM) or Air Jet Mill (AJM).
When developing a pesticide WDP formulation TOPL's wetting / dispersing agents are the best combination due to its various individual properties.
PROCESS FOR MANUFACTURING WETTABLE POWDERS :
STEP PROCESS NOTE 1. Total Batch time 2 hrs. Varies with the type of equipment used like AJM and ACM. 2. Pre-blending The weighed ingredients are mixed thoroughly for minimum 30 minutes in ribbon blender to get a homogeneous powder. Ribbon blender is normally used for blending purpose due to its cutting and shearing properties. 3. Milling The pre-blended material is transferred to the milling chamber through hopper in which the milling plates run with the speed of 3000 rpm in opposite direction. The milling process is normally done in ACM or AJM. 4. Post-blending The milled powder is passed through 325 mesh that are collected in the post-blender through dust collector. The material is again homogenised thoroughly to get evenly formulated material. The material again blended in ribbon blender. 5. Discharging Discharging of the finished material from the blender is carried out manually. Material is unloaded into the bags and weighed. 6. Testing Finished material is sent to Q.C. for testing of wettability and suspensibility as per standard ISI specifications or customer's own specifications. Sample is drawn randomly from various bags. 7. Q.C. requirements (For e.g.; In case of isoproturon) Wettability = < 120 seconds Suspensibility = 85% min. Wettability and suspensibility differ with difference in "active ingredients" and the percentage WDP formulation.
SOME OF THE PESTICIDES MADE AS WDP :
SR. NO. PESTICIDE CHEMICAL CLASS PROPERTIES MODE OF ACTION   PHYSICAL APPEARANCE M.P. / B.P. (°C) 1. Atrazine Triazine Colourless crystal 176 Selective, systemic pre and post emergence herbicides. 2. Captafol Pthalimide Colourless to pale yellow crystal 160 - 161 Non-systemic fungicide. 3. Captan Pthalimide Colourless crystal 178 Fungicide with protective and curative action. 4. Carbendezim Benzimidazole Colourless crystal 302-307 Systemic fungicide. 5. Lindane Organo-chlorine Colourless crystal 112 Insecticide with contact, stomach and respiratory action. 6. Isoproturon Urea Colourless crystal 155 Selective, systemic pre and post emergence herbicides. 7. Sulphur Inorganic Yellow powder 104.5 Non-systemic fungicide with protective action 8. Malathion Organo-phosphorus Clear Amber liquid 2.85 / 156-157 Insecticide and acaricide with contact stomach and respiratory action 9. Metalaxyl Acylolamine Colourless odourless crystal 71.8-72.3 Systemic fungicide with protective and curative action 10. Metribuzine Triazine Colourless crystal 125.5-126.5 Selective systemic herbicides 11 Acephate Organo-phosphorus Colourless crystal 93 Systemic insecticide with contact and stomach action
SOME OF THE PESTICIDES MADE AS WDP :
SR. NO. PESTICIDE PERCENTAGE OF TOPL WETTING AND DISPERSING AGENTS PFILLERS (PPT. SILICA, CHINA CLAY TYSPERSE TYTAN-DNT/ NCI/ NCH/ NCK TYTAN-TPS & TYSPERSE-DN/ CN 1 Acephate 75% WDP 0.5 - 1.0 - - Make to 100 2. Sulphur 80% WDP 0.5 4.0 - 4.5 - Make to 100 3. Carbendezim50%WDP 1.0 3.0 - 3.5 - Make to 100 4. Atrazine 50% WDP 0.5 3.5 - Make to 100 5. Malathion 25% WDP - 2.0 0.5 Make to 100 6. DDT 50% WDP - - 4.0 Make to 100 7. Isoproturon 75% WDP - - 6.0 - 8.0 Make to 100 8. Copper-oxychloride 50% WDP - 4.0 - Make to 100 9. Mencozeb 75% WDP 0.5 3.5 - 4.0 - Make to 100 10. Metaxuron 75% WDP 1.0 5.0 - Make to 100 11. CPP 50% WDP 1.0 6.0 - Make to 100 12. Tricyclozole 75% WDP     4.0 Make to 100