Q: Which epoxy resin for anti-corrosion primers?

E51 (bisphenol-A epoxy, EEW ~190) is the workhorse for general anti-corrosion primer formulation, paired with polyamide or polyamidoamine hardeners. For chemical-resistance-critical applications, epoxy novolac (EPN-1138, EEW ~175) gives superior performance against acids and solvents at the cost of formulation flexibility.

Q: What hydroxyl value should I target for a 2K PU topcoat?

For high-performance 2K PU automotive and industrial topcoats, hydroxyl-acrylic resins typically run OH value 80–150 mg KOH/g, paired with HDI biuret or trimer at NCO/OH ratio 1.05–1.15. Lower OH gives softer, more flexible films; higher OH gives crosslink density for chemical resistance.

Q: Can I use the same resin for solvent and waterborne formulations?

Generally no. Waterborne acrylic emulsions are colloidal stable particles; solventborne acrylic solutions are dissolved polymer chains. The same monomer ratio polymerized in different ways gives very different viscosity, drying, and film-formation behavior. Choose resin form (emulsion / solution / solid) up front based on carrier system.

Q: Do you supply resin TDS with full physical-chemical specs?

Yes — every resin TDS includes solids %, viscosity at 25 °C, MW (Mw, Mn, Mw/Mn), Tg, hydroxyl value or acid value, EEW where applicable, color (Gardner or APHA), and density. Storage stability and shelf life clearly documented. Full SDS in English and Chinese.

Question 1

What's the difference between long-oil and short-oil alkyd?

Accepted Answer

Long-oil alkyd (60%+ oil content) gives softer, more flexible films with slower drying — good for exterior architectural and brushed application. Short-oil alkyd (<40% oil) dries faster, harder, with better chemical resistance — used in industrial finishes and primers. Medium-oil sits in between for general-purpose enamels.

Question 2

Which epoxy resin for anti-corrosion primers?

Accepted Answer

E51 (bisphenol-A epoxy, EEW ~190) is the workhorse for general anti-corrosion primer formulation, paired with polyamide or polyamidoamine hardeners. For chemical-resistance-critical applications, epoxy novolac (EPN-1138, EEW ~175) gives superior performance against acids and solvents at the cost of formulation flexibility.

Question 3

What hydroxyl value should I target for a 2K PU topcoat?

Accepted Answer

For high-performance 2K PU automotive and industrial topcoats, hydroxyl-acrylic resins typically run OH value 80–150 mg KOH/g, paired with HDI biuret or trimer at NCO/OH ratio 1.05–1.15. Lower OH gives softer, more flexible films; higher OH gives crosslink density for chemical resistance.

Question 4

Can I use the same resin for solvent and waterborne formulations?

Accepted Answer

Generally no. Waterborne acrylic emulsions are colloidal stable particles; solventborne acrylic solutions are dissolved polymer chains. The same monomer ratio polymerized in different ways gives very different viscosity, drying, and film-formation behavior. Choose resin form (emulsion / solution / solid) up front based on carrier system.

Question 5

Do you supply resin TDS with full physical-chemical specs?

Accepted Answer

Yes — every resin TDS includes solids %, viscosity at 25 °C, MW (Mw, Mn, Mw/Mn), Tg, hydroxyl value or acid value, EEW where applicable, color (Gardner or APHA), and density. Storage stability and shelf life clearly documented. Full SDS in English and Chinese.

Resinas

How to Choose Resinas

Binder Family

MW & Tg

Functional Group Profile

Solvent / Carrier System

Industrias Servidas

Browse Resinas (120)

1,3-Propanediol (PDO)

1,4-Butanediol (BDO)

1,6-Hexanediol (HDO)

Acrylic Polyol Resin AP-6080

Acrylic Solution Resin A-870

Acrylic-Modified Alkyd Emulsion AAE-50

Acrylic-Modified Alkyd Resin AA-50

Alkyd Resin Long Oil 65%

Alkyd Resin Medium Oil 50%

Alkyd Resin Short Oil 55%

Benzoguanamine Formaldehyde Resin BG-65

Bismaleimide Resin BMI-70

Blocked MDI Prepolymer BPI-80 Single-Component

Brominated Epoxy Resin BE-20

C12-C14 Glycidyl Ether Reactive Diluent AGE

C5 Aliphatic Hydrocarbon Resin

C9 Aromatic Petroleum Resin

Castor Oil (Industrial Grade Polyol)

Castor Oil-Based Polyester Polyol COPE-200

Cellulose Acetate Butyrate CAB-381-0.5

Chlorinated Polypropylene Resin AG30 (Coating & Ink Binder)

Chlorinated Polypropylene Resin EG40M (28–35% Cl, Dry Lamination)

Chlorinated Rubber CR-20

Chlorosulfonated Polyethylene CSPE-40 (Hypalon-type)

Chlorosulfonated Polyethylene Resin CSM-40

Core-Shell Acrylic Emulsion CSA-30

Cycloaliphatic Epoxy Resin ECC

Cycloaliphatic Epoxy Resin ECC (3,4-Epoxycyclohexyl Methyl Acrylate type)

Dehydrated Castor Oil Alkyd Resin DCOA-65

Elastic Acrylic Emulsion EA-200

Epoxy Curing Agent PN-23

Epoxy Ester Resin EE-55 (Air-Dry)

Epoxy Hardener AW-106 / HV-953U (Polyamidoamine)

Epoxy Novolac Resin EPN-1138

Epoxy Novolac Resin EPN-1145

Epoxy Resin Bisphenol-F (E-51F)

Epoxy Resin Bisphenol-F EF-51

Epoxy Resin E-20 (Solid Grade)

Epoxy Resin E-44 (Bisphenol-A)

Epoxy Resin E-51 (Bisphenol-A)

Fluorine-Modified Acrylic Resin FAR-80 FEVE Type

Glycerol Ester of Rosin GER-80

High-Tg Acrylic Resin HA-8040 Wood Sealer

Hydrogenated Bisphenol-A Epoxy HBE-128

Hydrogenated Glycerol Ester of Rosin HGR-80

Hydroxyl Acrylic Resin HA-5560 Powder Coating Grade

Hydroxyl Acrylic Resin HA-6060

Hyperbranched Polyester Polyol HBP-500

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