UM55 & UM 50 resin equivalent to DOW’S VYHH & VYHD /WACKER’S H15/42 & HE15/45 resin

Vinyl Chloride-Vinyl Acetates Copolymer UM Type

UM 55 Equivalent to VYHH; UM50 Equivalent to VYHD

UM50 Solution Vinyl Resin is a high molecular weight copolymer of vinyl chloride and vinyl acetate. It is supplied as a powder. UM50 solution vinyl resin provides a good balance of chemical resistance, solubility, film strength and thermo plasticity. This resin is provides adhesion to PVC substrates.

Application: Mainly applied in PVC plastic color printing inks as binder. UM55 and UM62 applied as pigment media for color sheet also can be applied in paint and record.UM55 which equals to VYHH is also applied for making heat insulation materials mixed with nitrile rubber.

UM68 is mainly applied in spray ink for shoes. UM50 and VYHD is applied for high grade gravure inks and vanish, especially good for cold weather regions due to no gel occurring.

UM Type Vinyl Chloride-Vinyl Acetates Copolymer

Item\ Specification






Measuring Method and Code


White Powder Visual

Adhesion Number ml/g

(K Value)











GB/T 34011999

Calculated Based on Adhesion Number

Vinyl Acetates Content by Mass %






Q/320205 AHAD06-2006

Volatile Contents Including Water


GB/T 2914-1999

Sieving Rate

Pore Diameter 0.25mm


GB/T 2916-1999

Pile Density (g/ml)


GB/T 3402 Appendix A

Packing and Storage:

25 Kg /Bag; Craft Paper Bag or PP Knitted Bag lined with plastic film.

Stored in dry place at room temperature, Safety Issue refer MSDS and SGS Inspection Report

Like all chloro-acetic Copolymers, UM type resin forms thin film by solvent evaporation, it features good toughness, durable flexibility,
wearing resistance, waterproof, air tightness and   chemical resistance.
UM type resin film has good water resistance, excellent oil grease, diluted acid, alkali and salt solution resistance.

It can resist to hydrocarbon and alcohols like petroleum solvent.

Ketone is very good solvent for chloro-acetie copolymer, such as acetone, methyl ethyl ketone, cyclohexanone and isophorone. Compare with ketones, chloro-acetie copolymer has low solubility in eaters such as methyl acetate, ethyl acetate and butyl aerate.
When use, it should be heated slightly, or mixed with ketone.
Chloro-acetie copolymer also can be dissolved in chloro-hydrocarbon, nitro compound and alkanes, such as dichloroethane,
tetrahydrofuran, but these solvents  have toxicity, only used in special conditions.

When the resin concentration is high, adding small amount of ketone, which is strong solvent to the copolymer, will be very helpful.

UM type resin can compatible with other chloro-acetic copolymer resin, PVC
resin, perchlorovinyl resin, poly-ketone resin, chloroprene rubber, nitrile rubber, polyacrylates, epoxy resin, polyester and petroleum resin. It also can compatible with low viscosity, ester-soluble nitrocellulose.

Pigment and Filler:

Most Pigment and Filler can be used, such as Titanium Dioxide, chrome oxide green, carbon black, chrome yellow, barite, mica powder, calcium carbonate, etc. But when zinc, cadmium and iron oxide pigments are applied, special care should be taken, because it has catalysis function to the decomposition of chloro-acetic copolymer at high temperature.

Stability :
UM type resin has good light resistance and heat stability, but when it is used in outdoor at high temperature, organotin without sulfur composition and epoxy compounds stabilizer need to be used. UV stabilizer with light resistance can be added.

Plasticizer can be applied for UM type resin modification to improve its toughness and softness. for example:
Phthalic ester
Oxal ester
Sebacic ester
Epoxy chemicals
Chlorinated hydrocarbon

Main Application:
1. Binding agent: UM type resin inclduding UM50 , UM55 , UM68 , UM62 can be used as adhesives, especially in shoe industry.( for leather-leather binding). Suitable to be applied as coloring chips. UM type resin can also be used as adhesives for binding PVC, wood, sand stone bricks, glass, leather, fiber plate and paper.

UM type resin can be applied to make vanish for paper and shaped PVC products with waterproof, abrasion resistance, chemicals and oil, grease resistance properties. It is ideal material in packing industry, which requires durable, odorless, and meeting Food Hygiene requirement.

3. Strippable coatings: UM type resin has poor adhesion to metal, so, it can be used as strippable coatings to protect the metal surface, the stripping property can be adjusted by adding mineral oil or silicon oil.

4. Coatings for cement and brick construction and road mark paint.
For this application, UM type resin can be used solely, its can also be used together with vinyl chloride – vinyl acetate – maleic acid copolymer resin. The paint has long storing life, easy use, quick drying and forming film, good wearing resistance, especially, resistant to oil, grease, gasoline, salt and water, which assures its long working life, even for newly built asphalt or cement road.

5. Printing and Spray Ink
Mainly used in color printing inks and coatings for PVC products.

Food Products Regulation:
UM type resin complies with Chinese Food Packaging Application PVC Resin Sanitary Standard, Code No. GB4803.

Hazardous Chemical Regulation:
UM type resin is not Hazardous and Toxic Chemical and does not have classification number in “Hazardous and Toxic Chemical Category Number”  Code: GB6944-1986 issued by People’s Republic of China.

Packaging and Storage:
25 Kg/Bag.   Two options for the packaging bag: Craft Paper Bag or PP Knitted Bag lined with plastic film.

The Resin has a shelf life of approximately twenty four months when stored at  24(75H) and low humidity. Storage at higher temperatures or conditions of high humidity may result in some product discoloration.

Stored at dry place at room temperature.

Other properties refer to MSDS-0010