CYD Dendritic Polymers -Coating&Ink Modifier
Pigment Dispersants
Product Description
Dendritic polymers as "the fourth class of new polymer materials", are attractive to the scientific world and industrial circles. The novelty of these materials includes highly branched molecular structure, a large number of surface functional groups, void space in molecules, monodisperse molecular weight distribution and nanoscale dimensions. The structural characteristics of dendritic polymers lead to unique properties such as excellent solubility and dispersion properties, low melt viscosity and solution viscosity, difficult to crystallize and easy to form film, showing unparalleled nano features.

Dendritic polymers can be used in many ways: dendritic polymers’s high functionality of end groups, such as hydroxyl, carboxyl and carboxylate salt, have strong adsorption capacity of pigment, showing good stability and dispersibility; what’s more, dendritic polymers being partially modified with long-chain fatty provide steric hindrance to prevent pigment molecules aggregating. Dendritic polymers can be used as novel dispersants by using the special viscosity behavior to prepare high solid coatings.
Excellent properties of dendritic polymers as pigment dispersants
· A large number of anchoring groups to increase the pigment dispersion and adhesion; steric effects make pigment stably dispersed;
· Good dispersion properties for organic and inorganic pigments; can prevent sedimentation and solve the problem of inorganic pigments floating;
· Modified dendritic polymers have certain extinction performance and no need to add matting agent, it can be well applied to semi-gloss top coatings and floating coatings of the car, and shows very good performance to prevent sagging. It can be used for industrial marine coatings, container coatings, outdoor steel thick film coatings;
· Good control of the pigments is favorable to control chromatic aberration among different batches and construction conditions.

CYD Dendritic Polymers-Wastewater Treatment Materials
Demulsifiers
Product Description
Dendritic polymers as "the fourth class of new polymer materials", are attractive to the scientific world and industrial circles. The novelty of these materials includes highly branched molecular structure, a large number of surface functional groups, void space in molecules, monodisperse molecular weight distribution and nanoscale dimensions. The structural characteristics of dendritic polymers lead to unique properties such as excellent solubility and dispersion properties, low melt viscosity and solution viscosity, difficult to crystallize and easy to form film, showing unparalleled nano features.

Dendritic polymers have good solubility and carry positive charges in aqueous solution; they neutralize the droplets with negative charges in oily water, and are more stably adsorbed on the oil droplets due to its lipophilic carbon chains of organic polymer, thereby achieving the purpose of demulsification; dendritic polymers also can lower the viscosity of the system.
Excellent properties of dendritic polymers as demulsifiers
· Good water solubility and oil solubility;
• High efficiency of demulsification;
• Neat oil-water interface;
• Good universality;
• Less dosage and secondary pollution free.

Plastic Limit

This was determined using approximately 25g of sample.
The clay was mixed with water on a glass plate using the hands until it could be molded into a soft ball. This ball was split into two (2) with one being set aside.
The remaining ball was split into four (4) equal parts and each was molded between the fingers until it was 6mm in diameter then rolled into a clay thread of approximately 3mm diameter.
This process was continued until the clay longitudinally and transversely.
The moisture content of the four clay threads was then determined.
The process was repeated for the other clay ball. The plastic limit (PL) was is the average of the two moisture contents.

Plasticity Index

The plasticity index is calculated by subtracting the plastic limit from the liquid limit.

Water Absorption Capacity

The fired pellets were placed in boiling water in a beaker which was allowed to cool down.
The absorbed water was removed from the pellets surface using a moistured cloth.
The weight of the pellets was then measured (Ww).
The pellets were oven-dried at a temperature of 1100 C after which the dry weight was measured (Wd)
The water absorption capacity (Wa) was calculated by subtracting the dry weight (Wd) from the wet weight (Ww). The difference was divided by the weight.

Wa = Ww- Wd/ Wd × 100

Bulk Density

Bulk density of representative samples was calculated using a free-fall method (Akroyd, 1957).
A ring-stand was used to support a stainless steel beaker of known weight (wa) and volume (vd).
The base of a funnel was blocked and the funnel was filled with air-dried, sieved sample.
http://www.prestarticles.com/aqueous-polymer-effects-volumetric-swelling-namontmorillonite/