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Aldehyde resins (often specialized as A81 or HBX-130 types) are high-performance polycondensation resins, typically colorless to light yellow, designed for superior yellowing resistance and color stability in coatings and inks. They are widely used as grinding resins for universal pigment pastes, improving hardness, adhesion, gloss, and viscosity in coating formulations. 
Key Characteristics & Benefits 
  • Excellent Yellowing Resistance: Formulated to maintain colorfastness, making them suitable for clear coats and light-colored formulations.
  • High Compatibility: Compatible with most coating raw materials like nitrocellulose and polyamide resins.
  • Pigment Dispersion: Excellent grinding resin for pastes, enhancing pigment wetting and color strength.
  • Performance Improvements: Increases hardness, adhesion, gloss, and film fullness.
  • Solubility: Soluble in nearly all paint solvents (alcohols, esters, ketones), but not in water. 
Key Applications 
  • Coatings: Used in high-solid, light-fast coatings, overprint varnishes, and industrial paints.
  • Printing Inks: Ideal for flexographic and gravure inks on plastic, metal, and paper.
  • Adhesives: Enhances performance in specialized adhesive systems.
  • Colorants: Used as a binder for universal pigment concentrates. 
Common Product Examples 
  • Laropal® A 81 / SH-A81: Known for excellent lightfastness and and improving film toughness.
  • HBX-130/120a: A specialized aldehyde-ketone resin that provides enhanced weather resistance and solves issues with yellowing in outdoor conditions.
  • Non-Benzene Variants: Versions like Aldehyde Resin INT A-81 Non-Benzene are available for improved environmental compatibility. 
  • Google Patents
    Ketone-aldehyde resins, process for preparing them, and their ...
    translated from. Ketone-aldehyde resins, process for preparing them, and ~!- 7~, a ~ ,.. , , ~. a The invention relates to ketone-
  • en.hbxchem.com
    Aldehyde ketone resin HBX-130
    * Ink industry. The matching use of HBx series aldehyde ketone resin with nitrocellulose, polyamide resin and other raw materials ...
  • mpfs.io
    Aldehyde Resin SH-A81
    Aldehyde Resin SH-A81. Page 1. Aldehyde Resin. SH-A81. Aldehyde Resin SH-A81 is a kind of aldehyde polycondensation resin, which i...
  • China AAB Industry Technology Group
    OEM/ODM Print Ink Grade Aldehyde Resin A 81
    Printing Ink Grade Aldehyde Resin A 81 is a colorless, transparent to slightly yellow special resin mainly used in solvent based i...
  • BASF
    LAROPAL® A 81 | BASF
    Product highlights * • Promotes the natural grain and color of wood. * • Good elasticity, adhesion, and hardness. * • Excellent to...
  • Qingdao Sanhuan Colorchem CO.,LTD
    Aldehyde Resin SH-A81HV - Qingdao Sanhuan Colorchem CO.,LTD
    DESCRIPTION: Aldehyde resin is soluble in almost paint solvents but not in water and compatible with practically all coating raw m...
  • UL Prospector
    Universal Aldehyde Resin INT A81 - UL Prospector
    Dec 8, 2025 — Documents. ... Universal Aldehyde Resin INT A81 is soluble in organic solvents especially in ethanol, compatible with most coating...
  • UL Prospector
    Aldehyde Resin INT A-81 Non-Benzene - UL Prospector
    Dec 8, 2025 — Documents. ... Aldehyde Resin INT A-81 Non-Benzene is a crystal or light yellow solid aldehyde resin that has a good wetting funct...
  • www.rheologicaladditive.com
    ALDEHYDE RESIN | KETONIC RESIN 81 - organoclay
    Feb 26, 2024 — Aldehyde Resin | ketone aldehyde resin Ketonic resin is a light yellow, aldehyde polycondensation resin. It can be dissolved in ma...
  • Google Patents
    Ketone-aldehyde resins, process for preparing them, and their ...
    translated from. Ketone-aldehyde resins, process for preparing them, and ~!- 7~, a ~ ,.. , , ~. a The invention relates to ketone-
  • en.hbxchem.com
    Aldehyde ketone resin HBX-130
    * Ink industry. The matching use of HBx series aldehyde ketone resin with nitrocellulose, polyamide resin and other raw materials ...
  • mpfs.io
    Aldehyde Resin SH-A81
    Aldehyde Resin SH-A81. Page 1. Aldehyde Resin. SH-A81. Aldehyde Resin SH-A81 is a kind of aldehyde polycondensation resin, which i...
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Web results

LAROPAL® A 81


BASF
https://dispersions-resins-products.basf.us › products › la...
BASF
https://dispersions-resins-products.basf.us › products › la...
Depending on the application, it improves gloss, hardness, body, adhesion, and resistance to yellowing. Product highlights. • Promotes the natural grain and ...Read more
Discussions and forums
How to prevent Resin work turning yellow, especially Formulated Resin
Quora · 
1 answer
 · 4 years ago
How to prevent Resin work turning yellow, especially Formulated Resin
Quora · 
1 answer
 · 4 years ago
A UV stabilizing agent can be added to epoxy resin formulas to mitigate these effects. UV stabilizers are very effective at preventing gloss ...  More
Top answer · 4 years ago
Why Do Epoxy Resins Yellow? | Arash Jahandideh
LinkedIn · 
Arash Jahandideh
 · 210+ reactions
 · 1 year ago
Why Do Epoxy Resins Yellow? | Arash Jahandideh
LinkedIn · 
Arash Jahandideh
 · 210+ reactions
 · 1 year ago
See more

Web results

Aldehyde Resin SH-A81


mpfs.io
https://mpfs.io › assets › everchem › 2019/02 › Al...
mpfs.io
https://mpfs.io › assets › everchem › 2019/02 › Al...
PDF
It is soluble in almost all paint solvents but not in water and compatible with practically all coatings raw materials, it has excellent yellowing-resistance.Read more
2 pages

Yellowing Resistance Aldehyde Resin


China AAB Industry Technology Group
https://www.aabindustrygroup.com › yellowing-resistanc...
China AAB Industry Technology Group
https://www.aabindustrygroup.com › yellowing-resistanc...
AAB Group's Anti-yellowing Aldehyde Resin SH-98S is a colorless to pale yellow transparent solid powder, an aldehyde condensation resin engineered for ...

Aldehyde Resin- A81C


Taiwan Dyestuffs & Pigments Corp.
https://www.tdpctw.com › news-51908 › Aldehyde-Resi...
Taiwan Dyestuffs & Pigments Corp.
https://www.tdpctw.com › news-51908 › Aldehyde-Resi...
The product is a colorless, transparent to slightly yellowish yellowing-resistant fatty aldehyde hard resin, also known as universal resin.Read more

Urea Aldehyde Resin


Polyols & Polymers
https://www.polyolsandpolymers.net › product › detail
Polyols & Polymers
https://www.polyolsandpolymers.net › product › detail
POLYTONE® UA Series Aldehyde resins are pale, yellowing-resistant aldehyde resins that is soluble in almost all paint solvents and compatible with practically ...Read more

67205 Aldehyde Resin A 101


Kremer Pigmente Online Shop
https://www.kremer-pigmente.com › files
Kremer Pigmente Online Shop
https://www.kremer-pigmente.com › files
PDF
It can be used to improve gloss, hardness, body, adhesion and yellowing resistance, depending on the coating´s intended application. A very pale color and ...Read more
2 pages

Ketone-aldehyde resins, process for preparing them, and ...


Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
Disclosed are ketone-aldehyde resins, with low water content and high thermal stability and yellowing resistance, and a process for preparing them in high ...

Aldehyde Resin


SunyChem
https://www.sunychem.com › Aldehyde-Resin-SN-81-pd...
SunyChem
https://www.sunychem.com › Aldehyde-Resin-SN-81-pd...
Pale, yellowing-resistant aldehyde resin that is soluble in almost all paint solvents and compatible with practically all coating raw materials.Read more

ALDEHYDE RESIN CAS 28931-47-7 - Organoclay


rheologymodifiers.com
https://www.rheologymodifiers.com › aldehyde-resin
rheologymodifiers.com
https://www.rheologymodifiers.com › aldehyde-resin
It can enhance the paint's gloss, hardness, adhesion, and has strong yellowing resistance. It has excellent wetting, solubility, and dispersibility with some ...Read more
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