Patcham PAT-ADD Dispersants, Defoamers, Rheology Modifiers and Catalysts

Selection and quotation of Patcham additives: PAT-ADD dispersants and defoamers, rheology modifiers, PATSTAB stabilizers, PATcat catalysts and PATcure accelerators.

PAT-ADD DA Wetting and Dispersing Agents

Polymeric PAT-ADD DA dispersants for waterborne, solventborne and solvent-free paints, inks and pigment dispersions. DA 817 stabilizes acidic pigments, carbon black and silica matting agents, DA 3054 is designed for co-grinding and industrial pigment concentrates.

DA 817: 0.3–3% on inorganic pigments
DA 3054: 0.5–3% on mill-base
DA 3054: 5–12% in pigment concentrates
Dispersants for transparent iron oxides

PAT-ADD AF Defoamers and Deaerators

PAT-ADD AF defoamers for waterborne emulsion paints, varnishes, inks and pigment dispersions. AF 39 is an oil-free, VOC-free organically modified polydimethylsiloxane. AF 21 and AF 11 are mineral oil defoamers, AF 21 is modified with polysiloxane for universal colorants.

AF 39: 0.08–0.8% on total formulation
AF 39: oil-free and VOC-free siloxane
AF 21: mineral oil with polysiloxane
AF 11: for emulsion paints

PAT-ADD Rheology and Surface Modifiers

PAT-ADD RHEOL associative thickeners for waterborne dispersion paints, LE surface additives and the RU 02 corrosion inhibitor. RHEOL 117 builds KU viscosity at mid to high shear, LE 1079 wets substrates without PFAS or silicone, RU 02 prevents flash rust.

RHEOL 117: 0.4–3% on total paint
LE 1023: levelling at 0.05–0.5%
RU 02: 0.1–0.6% on liquid paint
LE 1079: PFAS-free, silicone-free wetting

PVC Plastisol Additives and PATSTAB Heat Stabilizers

For plastisols PAT-ADD offers wetting and dispersing agents, air release agents, defoamers, viscosity depressants and foam stabilizers. PATSTAB heat stabilizers cover liquid and powdered mixed metal complexes, organo-tin, Ba/Zn and Ca/Zn grades and chemical foam kickers.

Plastisols: flooring, artificial leather, underbody sealants
PATSTAB: methyl tin stabilisers
PATSTAB: liquid mixed metal systems
Cable compounds to BS EN 50363-3

PATcat Metal Catalysts for Polyurethanes

PATcat catalysts for polyurethanes and polyisocyanurates: dibutyl, dioctyl and dimethyl tin grades, tin-free bismuth and zinc grades, and the potassium 5000 series for trimerization in PIR rigid foam. Grades differ in activity, delayed action and hydrolytic stability.

PATcat 3001: dibutyltin dilaurate, 18% metal
PATcat 4007: bismuth neodecanoate, 20% metal
PATcat 9003: zinc neodecanoate, 19% metal
PATcat 5000 series: potassium trimerization

PATcure Accelerators and Alkyd Driers

PATcure accelerators cure unsaturated polyester, vinyl ester and (meth)acrylate resins in fibre-reinforced composites and gel coats; Patcham driers serve alkyd paints and inks. The range includes cobalt replacements, the lead-free PATcom PBF combination and the PATox 41 drying enhancer.

Cobalt: 0.005–0.020% metal on resin
PATcure 2720: replaces cobalt 12%
PATox 41: 0.04–0.40% on resin solids
Lead-free and cobalt-free driers

Choosing a Dispersant by Pigment and Milling Process

Dispersant dosage is calculated on pigment or mill-base weight.

For PAT-ADD DA 817 the manufacturer gives 5–30% on carbon blacks and organic pigments and 0.3–3% on inorganic pigments and fillers; the grade acts as an anti-settling agent for silica matting agents and suits solvent-free EP and PUR floorings.

DA 3054 is a polyurethane with cationic pigment affinic groups in n-butyl acetate: 0.5–3% on mill-base in co-grinding and 5–12% in pigment concentrates. Patcham also offers dedicated dispersants for transparent iron oxides.

Additive Package for Waterborne Direct-to-Metal Paint

The AF 39 defoamer is dosed at 0.08–0.8% on total formulation, up to 1% in pigment dispersions. The RHEOL 117 associative thickener is added at 0.4–3% on total paint during let-down: it builds an almost Newtonian flow profile and can be combined with low shear thickeners to boost sag resistance.

The LE 1023 levelling additive is used at 0.05–0.5%. The RU 02 inhibitor is added at 0.1–0.6% on liquid paint under mild mixing at let-down and prevents in-can corrosion and flash rust.

Choosing PVC Heat Stabilizers and Plastisol Additives

PATSTAB stabilizers are selected by processing method and product requirements, from general purpose grades to formulations meeting strict limits on odour, VOC, toxicity and labelling.

The range covers liquid and powdered mixed metal complexes, organo-tin, Ba/Zn, Ba/Cd and Ca/Zn grades, plus Ca/Zn solid one-pack stabilizers for cable compounds.

PAT-ADD plastisol additives lower paste viscosity, release air and stabilize foam in flooring, coated textiles, artificial leather and car underbody sealants.

Choosing a PU Catalyst and a Resin Accelerator

PATcat tin gel catalysts range from fast acting to delayed action and differ in hydrolytic stability. Bismuth catalysts are fast acting but need a higher dosage than tin; zinc catalysts give a slight delay in the gel reaction.

Enhanced bismuth grades PATcat 4009, 4012, 4020 and 4031 are dosed at 0.5–1.5% on polyol. In unsaturated polyester resins cobalt is used at 0.005–0.020% metal on binder solids; cobalt accelerators must never be premixed with peroxides because of the explosion hazard.

Patcham and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Patcham and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.