Formaldehyde Resin

Product Description

Charateristics:
Formaldehyde resin (also known as polyacetal resin) is a colorless and transparent to light yellow, anti-yellowing aliphatic aldehydes hard resin, also known as a panacea resin. Its appearance is divided into granulation small semi-circular rules and non-granulation irregular small particles, be used in solvent-based coatings and inks, solvent-free coatings, waterborne coatings, powder coatings, resins modified, and other systems as a special hard resin. KR-A*1 can be marked to improve the anti-yellowing of the paint film, to shorten the drying time, to increase the film hardness, fullness and shine, to increase the solid content. Because of low-viscosity characteristics, KR-A*1 & can reduce the usage of organic solvent paint industry and reduce atmospheric pollution caused by VOC emissions. KR-A*1 have an excellent dispersion in the metal pigment and other pigment wetting, while soluble in most organic solvents, so they are fit for oil-soluble condiments. In particular, they can reduce the cost of color paddle more than *0%, and middle-low solvent adaptation much better than those of similar products abroad. KR-A*1 can also be used for powder coatings and chlorinated rubber modified and so on. In general, the product performance has reached even more than similar foreign products and it is widely used in coating of paint, ink and other industries as a special resin.
specification:
Name                                Test standard                         KR-A*1       KR-A**1
Appearance visual measurement Colorless transparent to light yellow semi-circle fine small grain
Specific gravity(*0 ℃ g/cm3)ISO *****1:***4(E)B          1.1           1.1
Hydroxyl value(mgKOH/g) DIN ******2:***8               *5±*0        *0±*0
Acid value(mgKOH/g) ISO   ***4:***0                               <1             <1
Chroma                                ISO *****1:***4                       ≤1            ≤1
Fe-Co                                                                                         **2            **2
Water content Wt%                                                                   <1             <1
Molecular formula number average                               ******0 ******0
Softening point(℃)              ISO *****1:***4                  *5±*0          ≥**0
Application:

Ⅰ,As the light color and excellent pigment wetting, KR-A**-formaldehyde resin especially suitable for making universal colorants. What's more, its low solution viscosity can make it produce high-pigment content paste.
Ⅱ, KR-A**-formaldehyde resin is superior to aldehydes and ketones resin in the color, anti-yellowing, anti-aging, flexibility, adhesion, solubility and drying speed when they are used in wood, metal, paper, polyurethane and other coatings.
Advantage:
KR-A*1 is soluble in most of solvents, such as alcohols, esters, ketones, ethers, aromatic solvents, aliphatic hydrocarbons, while similar foreign products are not soluble in aliphatic hydrocarbons solvents, only a limited use of this solvent to dilute. KR-A*1 is not soluble in water.
KR-A**1 is with high OH value and softening point than KR-A*1