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{"title":"Haminol 303G Methylated Melamine Resin with 98% Solid Content Low Free","imgUrl":"https:\/\/img.chinax.com\/nimg\/db\/6a\/4a6adfbe473b833473afe438b1d8-200x200-1\/haminol_303g_methylated_melamine_resin_with_98_25_solid_content_low_free.jpg","attrs":{"Brand Name":"Haminol","Model Number":"303G","Place of Origin":"CHINA","Minimum Order Quantity":"1.125t"}}
{"title":"Colourless Rubber Methylated Melamine Resin Transparent Hmmm Crosslinker","imgUrl":"https:\/\/img.chinax.com\/nimg\/ac\/83\/d82ec3b73a982514aba78ac38dd1-200x200-1\/colourless_rubber_methylated_melamine_resin_transparent_hmmm_crosslinker.jpg","attrs":{"Brand Name":"Haminol","Model Number":"303A","Place of Origin":"China","Minimum Order Quantity":"1T"}}
{"title":"Good Hardness Methylated Melamine Resin Melamine Formaldehyde Resin Liquid","imgUrl":"https:\/\/img.chinax.com\/nimg\/e2\/e7\/33704668c92d859aa297e43539ff-200x200-1\/good_hardness_methylated_melamine_resin_melamine_formaldehyde_resin_liquid.jpg","attrs":{"Brand Name":"Haminol","Model Number":"325","Place of Origin":"China","Minimum Order Quantity":"1T"}}
{"title":"Haminol 327 Methylated Melamine Resin The Ideal Choice for Coating Manufacturers","imgUrl":"https:\/\/img.chinax.com\/nimg\/89\/3a\/f842f25a6945007cf307341f0584-200x200-1\/haminol_327_methylated_melamine_resin_the_ideal_choice_for_coating_manufacturers.jpg","attrs":{"Brand Name":"Haminol","Model Number":"327","Certification":"ISO","Place of Origin":"CHINA"}}
{"title":"High-Performance Methylated Melamine Resin HMMM Crosslinker with 98% Solid","imgUrl":"https:\/\/img.chinax.com\/nimg\/81\/f8\/9008ecf05fa6b226176ed677ad1c-200x200-1\/high_performance_methylated_melamine_resin_hmmm_crosslinker_with_98_25_solid_content_2c_colourless_and_transparent_2c_low_voc_for_.jpg","attrs":{"Brand Name":"Haminol","Model Number":"303","Place of Origin":"CHINA","Minimum Order Quantity":"1.125t"}}
{"title":"Methylated melamine resin-325","imgUrl":"https:\/\/img.chinax.com\/nimg\/cc\/4b\/dd1e1153f95b47f1e24f88dff29a-200x200-1\/methylated_melamine_resin_325.jpg","attrs":{"Brand Name":"Haminol","Model Number":"325","Place of Origin":"CHINA","Minimum Order Quantity":"1.125t"}}
{"title":"Haminol 385 Methylated Melamine Resin - Fast Curing, Water Soluble, Reacts with","imgUrl":"https:\/\/img.chinax.com\/nimg\/ac\/e3\/8bd6f4c510dd20179a34cabece8f-200x200-1\/haminol_385_methylated_melamine_resin_fast_curing_2c_water_soluble_2c_reacts_with_hydroxyl_26_carboxyl_groups.jpg","attrs":{"Brand Name":"Haminol","Model Number":"385","Place of Origin":"CHINA","Minimum Order Quantity":"1.125t"}}
Haminol 303G is an advanced methylated amino-based crosslinking agent engineered with negligible formaldehyde emissions (<0.01%) and ultra-high non-volatile content (≥98%). This formaldehyde-exempt formulation demonstrates exceptional compatibility as a reactive curing component for hydroxyl-functional polymers including alkyds, polyesters, acrylics, epoxy systems, PU derivatives, and specialty fiber-reinforced composites. Its low-VOC profile supports applications in solventless high-build coatings, waterborne automotive refinishes, coil coating systems, industrial bake-on finishes, and heat-resistant graphic inks requiring minimal hazardous air pollutants.
Advantages
Solvent-free formulation
Wide compatibility and solubility
Excellent stability
Excellent hardness-film flexibility balance
Fast catalyzed cure response
Low free formaldehyde content
Economical performance
Application Areas
High solids finishes
Water borne finishes
Coil coatings
Automotive finishes
Container coatings
General metals finishes
Inks
Typical Characteristics
Property
Specification
Appearance
Clear, viscous liquid
Non-volatile, % by weight*
98.0 minimum
Color, Gardner 1963
1 maximum
Viscosity, Gardner-Holdt, 25°C
Y-Z2
Viscosity, Cone/Plate, cps
2000-6000
Weight/gallon, pounds, approximate
10.0
Specific gravity, 25°C, approximate
1.20
Refractive index
1.515-1.520
Flash point, Setaflash, °F
>200
Flash point, Tag open cup, °F
>200
Free formaldehyde, weight %
<0.01
Solubility Profile
Haminol 303G exhibits broad compatibility with conventional organic solvents such as aromatics, alcohols, esters, and ketones. While its water solubility is restricted, the resin demonstrates excellent aqueous dilution stability when formulated with water-reducible polymer blends.
Curing Mechanism & Catalyst Requirements
Owing to its advanced methylation degree, Haminol 303G efficiently crosslinks hydroxyl-, carboxyl-, and amide-functionalized co-resins (e.g., alkyds, acrylics, polyesters) under acidic conditions. Optimal curing necessitates catalytic activation by strong acids (pKa ≤1), though dosage adjustments may be required to counteract alkaline additives or pigments in the system.
The resin's high functional density and resistance to self-polymerization enable superior crosslinking efficiency. In polyester-based formulations, it imparts exceptional film flexibility and thermoformability. The reactive equivalent weight typically spans 130-190 g/eq; however, precise formulation optimization—tailored to target performance metrics (e.g., adhesion, hardness)—is recommended to determine ideal loading ratios.
Product Gallery
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2008
Total Annual:
30million-50million
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Chongqing Jianfeng Haokang Chemical Co., Ltd., a subsidiary controlled by Chongqing Chemical & Pharmaceutical Holding (Group) Company, is located in the Baitao Chemical Park, Fuling District, Chongqing. Inheriting the rigorous spirit of the nuclear military industry dating back to 1966, we speci... Chongqing Jianfeng Haokang Chemical Co., Ltd., a subsidiary controlled by Chongqing Chemical & Pharmaceutical Holding (Group) Company, is located in the Baitao Chemical Park, Fuling District, Chongqing. Inheriting the rigorous spirit of the nuclear military industry dating back to 1966, we speci...
