Paint Driers

A Short Description about UNINOX Grade Paint Driers…

UNINOX grade driers are based on 2 Ethyl hexanoic acid. They are formulated to impart high metal contents and low viscosity. Neodecanoate/Versates and Naphthenate based Paint Driers are also available.
UNINOX driers are offered as highly balanced liquid systems characterized by (1) Purity of highest order. (2) Good Stability and Solubility in various vehicles. (3) Retention of clarity over long periods of time. (4) Low Viscosity for easier handling. (5) Certified metal content. (6) High metal content with no tendency to crystallize or sludge out. (7) Resistance to atmospheric and climatic conditions. (8) Resistance to colloidal shock. (9) Less tendency to be absorbed. (10) Odourless.

Cobalt Octoate

Cobalt Octoate is the most active surface drier. Cobalt effects rapid surface drying and is generally used in conjunction with auxiliary driers. It is usually added at 0.05 to 0.4 % based on vehicle solids. It is a strong oxidant. It is compatible with all surfaces coating media. Atmospheric humidity does not affect Cobalt drier. This unique feature prevents water vapor present in atmosphere from penetrating the paint film.
Cobalt Octoate being the most effective drier promotes polymerization of media, hardens the paint film, improves gloss and water resistance and reduces brittleness of film. The careful use of Cobalt octoate gives the paint film a good gloss, free from frosting tendency. This drier is a universal drier, which is essential in all the media and is capable of performing individually giving reasonable properties to the paint film.
In air-drying type insulating varnishes use of Cobalt Octoate increases water resistance, but the excessive use of Cobalt Octoate causes brittleness and early failure of insulation.
Cobalt Octoate accelerates the catalytic action of Methyl Ethyl Ketoxime (MEKO) to polymerize unsaturated polyester resin.  Technical Data Sheet (TDS) of commonly used Cobalt Octoate is available in website.

Manganese Octoate

Manganese Octoate is a very stable auxiliary drier. It is an active drier metal and strong oxidant, promotes polymerization to a greater degree than cobalt. It is often used alone in backing finishes and in combination with Lead and Cobalt in air-dry applications.
Manganese Octoate is mainly used in exterior paints, floor finishes, backing enamels and in the paints where colour is not a constraint. The dosage of Cobalt octoate can be minimized by using Manganese Octoate as it is capable of replacing Cobalt because of its high activity.
Manganese Octoate prevents paint film from the wrinkling effect. Manganese Octoate is not recommended in white finishes as it gives a typical tinting effect of its own color. Technical Data Sheet (TDS) of commonly used Cobalt Octoate is available in websit.

Lead Octoate

Lead is one of the auxiliary driers also called as through drier. Lead Octoate is used as active or top drier. It promotes hard, through drying throughout the entire film and also promotes flexibility. In alkyd finishes where fume proof finishes are not specified. Lead is used in combination with Cobalt and Calcium Octoate. It is always advisable to use Lead Octoate after the addition of Calcium Octoate to eliminate the possibility of reaction of lead with unreacted phthalic anhydride in alkyd media, which could form lead phathlate.
In long oil alkyd medium 0.05 to 2.00% of lead is the usual amount required in conjunction with Cobalt and Calcium soaps. In outside paints and floor finishes as well as in banking enamels Lead Octoate is used with Manganese drier to produce a tough and hard film. In tong oil phenolic resin, lead promotes drying. It is also used in Polyurethane finishes as major auxiliary drier. Lead Octoate is the most important auxiliary drier especially in applications where drying is required at low temperatures (less than 10 deg. centigrade.) Technical Data Sheet (TDS) of commonly used Lead Octoate is available in website.

Zirconium Octoate

Zirconium Octoate is a very efficient auxiliary drier. It is use in paint media with Cobalt and other auxiliary driers to boost up the performance of paints and varnishes. Zirconium Octoate is the best replacement of Lead octoate when used in combination with Cerium or Calcium octoate in the lead free paint systems.
Zirconium Octoate shows goods gloss retention, colour, and colour retention compared to Lead, but does not perform as well under adverse drying conditions of low temperature and high humidity. Zirconium Octoate is the most useful drier for water resistant finishes due to its stabilizing effect on the ester linkages in the media.
As a strong cross-linking agent, Zirconium improves the hardness and gives better adhesion. Because of its abrasion resistant characteristics it is used in wire enamels. In alkyd amino combinations, Zirconium Octoate has been proved to be the best auxiliary drier, which resists absorption and improves the performance of other driers used in combination with it. It has a good effect in epoxy esters too. But in the phenolic resin media, Zirconium has not shown any significant effect. Zirconium Octoate is widely used in white paints in combination with Cobalt and Cerium Octoate as it reduces the yellowing tendency of the white film and retains the whiteness by protecting the film from any weather effects. Lead octoate is not recommended in the white paint when Zirconium Octoate is used as an auxiliary drier.  Technical Data Sheet (TDS) of commonly used Zirconium Octoate is available in website.

Strontium Octoate

Strontium Octoate is an 100% heavy metal free and non toxic through drier for “Green Paint and varnish” production. UNINOX Sr 12 have several adaventages over Zirconium Octoate as mentioned below:
1. Strontium can replace Zirconium in 1:1 basis with added advantages like Strontium is 100% non toxic as compared to Zirconium. Zirconium is considered heavy metal with some toxicity.
2. Paint formulation with Cobalt, Strontium and Calcium, can reduce Cobalt dosage with same drying properties as compared to Cobalt, Zirconium and Calcium Paint formulation.
It can be understood easily from below formulation guideline:
Paint Formulation A
Cobalt      =0.04
Strontium =0.04
Calcium    =0.04
Paint Formulation B
Cobalt        =0.06
Zirconium =0.04
Calcium     =0.04
Hence, Paint Technologist now able to reduce cobalt dosage with Cobalt, Strontium and Calcium combination. Presently Cobalt and Zirconium price increases very high and hence nowadays Paint Technologist is using Paint Formulation A to keep their formulation cost unchanged during this difficult time.
3. Paint formulation with Cobalt, Strontium and calcium gives better properties such as outdoor aging resistance and adverse conditions like high humidity and low temperatures as compared to Cobalt, Zirconium and calcium.
4. Strontium drier as a replacement of Zirconium and Lead driers has established its capability to enhance drying performance and hardness development without any negative impacts on color and gloss for long storage conditions without gelling.

Calcium Octoate
Calcium Octoate is an important auxiliary drier. It is used in combination with Lead and Cobalt octoate, mainly in alkyd finishes.
Calcium Octoate prevents the formation of lead haze in clear medium. Alkyd resin paints and varnishes containing Lead drier may become cloudy during the storage due to precipitation of insoluble Lead phathalate. This defect can be markedly reduced or eliminated by including a fairly substantial proportion of Calcium Octoate in the drier mixture.
Calcium used in conjunction with Cobalt increases the efficiency of Cobalt drier in the paint medium. Calcium Octoate is an important auxiliary drier which eliminates hazing, blooming, clouding of the finishes and keeps them clean and shiny.
Calcium Octoate suppresses the gas checking effect and wrinkling effect in the alkyd finishes where Cobalt and Lead driers are used in combination with Manganese Octoate.
Technical Data Sheet (TDS) of commonly used Calcium Octoate is available in website.

Zinc Octoate

Zinc Octoate is an auxiliary drier used as a pigments dispersing agent. The pigment such as titanium dioxide and carbon black have the tendency to absorb driers which reduces loss or effect of drying rate.
The absorption of driers in pigments can be reduced by grinding the pigments with Zinc Octoate to retain the drying capacity of the paint media. The preparation of paints based on high viscosity media which may have only limited solubility in the solvent employed, Zinc Octoate should be used before the addition of pigment as well as other drier combinations.
Zinc Octoate prevents the paint film from webbing and frosting effects. The use of Zinc Octoate is not suggested with dehydrated castor oil media and long oil media because these driers may produce bloom and reduce gloss of the film. Technical Data Sheet (TDS) of commonly used Zinc Octoate is available in website.

POLYESTER PROMOTERS

Water white color UNINOX K 15 and UNINOX K 10 widely used as polyester promoters.

FUNGICIDES/WOOD PRESERVATIVES

UNINOX Cu 10 N and UNINOX Zn 08 N widely used as fungicides and wood preservatives.

Waterborne UNINOX Grade Paint Driers

Due to strong environmental legislation to reduce Volatile Organic Content (VOC) in Paint, excellent water reducible resins with very low VOC content are now being used by Paint manufacturers. Today Pau Tai based on their Innovative Technology on Metal Carboxylate developed UNINOX grade driers specifically designed for the curing of waterborne Paints and Coatings.

UNINOX Co 06WD is a water dispersible metal carboxylate containing 6% cobalt metal. UNINOX Co 06WD is developed to catalyze the oxidative cure for waterborne resins and hence acts as “Surface” drier for waterborne resins. Recommended starting point concentration is 0.10-0.15% metal/binder.

UNINOX Mn 06WD is a water dispersible metal carboxylate containing 6% manganese metal. UNINOX Mn 06WD is developed to catalyze the oxidative cure for waterborne resins and hence acts as “Surface” drier for waterborne resins. Recommended starting point concentration is 0.10-0.15%metal/binder.

UNINOX Ca 06WD is a water dispersible metal carboxylate containing 6% of calcium metal. It acts as an auxiliary drier for water-reducible alkyd coatings and is responsible for crosslinking these polymers. It also functions as an economical pigment-wetting agent and loss-of-dry inhibitor. Recommended starting point concentration is 0.2% metal/binder.

UNINOX Zr 12WD is a water diluteable metal carboxylate containing 12% of zirconium metal. UNINOX Zr 12 WD is an auxiliary drier for water-diluteable alkyd coatings and is responsible for crosslinking these polymers. Recommended starting point concentration is 0.3% metal/binder.

PAU TAI COMBINATION DRIERS

PAU TAI offers a wide range of Combination Driers based on our Innovative Technology on Metal Carboxylate and extensive experience while working with Formulators of our reputed customers (MNC and Local). We can tailor make any combination as per customer’s specification and requirements.  
Variety of Lead-free and Leaded multi-metallic Drier blends are available in dearomatized white spirits. Specialty Drier blends can be tailor-made to customer requirements.

Specifications

Product / Grade	Total Metal Content , % W/W	Active Cobalt, % W/W	Appearance	Colour	Solids Content, % w/w	Density at 30°C	Viscosity at 30°C, cSt	Application information
UNINOX PT 132M (Lead-free : Co/Ca/Zr)	9.4	1.2	Liquid	Blue	43-53	0.87 – 0.95	100 max	Alkyd Resin paint drier blend
UNINOX PT 133 (Lead-free: Co/Ca/Zr)	7	1	Liquid	Blue	40 – 50	0.86 – 0.94	100 max	Alkyd Resin paint drier blend
UNINOX PT 246  Lead free (Co/Ca/Zr)	11.23	1.7	Liquid	Blue	49- 59	0.96-1.04	600 max	Alkyd Resin paint drier blend
UNINOX PT 69 Lead free (Co/Zr)	15	6	Liquid	Blue	45 – 60	0.95 – 1.05	300 max.	Alkyd Resin paint drier blend
UNINOX PT 421 Lead free (Co/Ca/Zr)	7.2	1.2	Liquid	Blue	29-39	0.86-0.94	100  max	Alkyd Resin paint drier blend
UNINO PT 503 Lead Free (Co/K)	11.9	3.2	Liquid	Blue	57-63	0.92-1.02	500 max	Polyester Resin paint drier blend
UNINOX PT 134 Lead Free (Co/Ca/Zr)	11.8	1.8	Liquid	Blue	47-57	0.93-1.03	100 max.	Alkyd Resin paint drier blend
UNINOX PT 144 (Lead-free: Co/Ca/Zr)	11.1	1.7	Liquid	Blue	49-59	0.96-1.04	500 max.	Alkyd Resin paint drier blend
UNINOX PT 1012 (Co/Ca/Pb)	13.6	1.2	Clear Liquid	Blue	34-43	0.96-1.00	100 max	Alkyd Resin paint drier blend
UNINOX PT 1530 (Co/Ca/Pb)	32.1	1.5	Clear Liquid	Blue	69-79	1.24-1.32	250 max.	Alkyd Resin paint drier blend
UNINOX PT 418 T (Co/Mn)	6	4.8	Clear Liquid	Blue	33-41	0.84-.092	200 max.	Printing Ink drier blend