Hyperbranched polyester applications in coating industry.
(1) Epoxy resin curing agent.
Hyperbranched polyester has a large number of active end groups, amino groups and carboxyl groups can react with epoxy groups.
Applicable products:
Hyperbranched polymer with amino groups,carboxyl groups,such as PAMAM and modified hyperbranched polyester.
Examples 1:

Carboxyl-terminated dendrimer as curing agent by reaction of a carboxyl group with an epoxy group of the epoxy fixed on the three-dimensional network structure, along with appropriate increase of the mass fraction resulting cured crosslink density increases, by the action of stretched force, the three-dimensional network structure of the epoxy resin can maintain its rigidity, can withstand greater tensile force, making the tensile strength increases. As shown, the tensile properties test due to GB/T-2568-1995, temperature (23±2) ℃, rate of extension 2mm/min, when add modified hyperbranched polyester CYD-220T mass fraction of 15 %, the tensile strength reaches the maximum 64.86 MPa, is 3 times than the system without adding it.

Example 2:

Using dendrimers with amino terminal group as the epoxy resin curing agent, adding the theoretical amount and without diluent, at 20 ℃, usage time and gel time of such coatings are 6.0 and 2.4 times than ethylenediamine/epoxy System. And curing at 95 ℃, 120 ℃, 150 ℃, curing speed are 1.8 times, 3.4 times and 4.8 times than ethylenediamine/epoxy resin system.

(2)Epoxy resin additives

Principle:
Non-reactive end groups of the hyperbranched polymer does not react with the epoxy resin, curing agent, or the reaction activity is low. In epoxy curing system, the cured is modified by physical blending.
Applicable products:
Hyperbranched polyester series.
Application examples:
Hydroxyl-terminated hyperbranched polyester can improve the tensile strength and impact strength of epoxy resin, adding the hydroxyl-terminated hyperbranched polyester of 10% mass fraction, the tensile strength and impact strength were increased by 17.7% and 26.3%, and after adding hyperbranched polyester, impact strength at low temperature is not lower than room temperature.

(3) Hyperbranched epoxy resin.
Epoxy-modified hyperbranched polyester can significantly improve the toughness of the epoxy resin coating, the impact resistance, along with the amount increase of the hyperbranched polyester, the impact resistance increases, while the dosage is 15%, the impact resistance is 296% of the original one and the rate of curing, mechanical strength of the original epoxy resin matrix are not affected, which is attributed to plasticizing properties of hyperbranched polyester and particulate structure in epoxy resin phase. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.

Hyperbranched polyester is widely used in the field of coatings.
Hyperbranched polyesters can be widely used in coatings, either as direct additives, curing agent or as a coating material, have shown superior property compared with conventional additives . Hyperbranched polyester with double bonds nidified in the UV-curable coatings has outstanding performance. Such as for flexible material, showing excellent resistance to oxygen permeability, the PET and PP were increased resistance to oxygen permeability of 2.3 times and 15 times, in addition, it conglutinates well with the PET and PP packaging substrate. It has promising applications prospects.Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers, forwards from Barrier coating for flexible packaging based on hyperbranched resins Lange, E Stenroos, M Johansson Department of polymer technology, Royal Institute of Technology,S-100 44 Stockholm Sweden Polymer,2001,42,7403-7410

PAMAM Dendrimer Nanocomposites catalyst has a good application prospect.
PAMAM dendrimers can be prepared as a template with good dispersion, high stability, uniform size and controllable quantum dots, solubility of quantum dots in organic or inorganic solvent can be adjusted through the terminal functional group modification to make it used as quasi-homogeneous catalysts. It can fully contact with the reactants to increase the catalytic efficiency and is heterogeneous catalyst which is easy to separate. Furthermore, active surface groups of PAMAM make the quantum dots attached to the carrier, which can enhance the re-use and recycling performance of the catalyst. Thus, the quantum dot/PAMAM Nanocomposites catalyst has good application prospects. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers, forwards from "Effect of Polymer Templates on the Preparation and Photocatalytic Activity of CdS Quantum Dots" Cong Rimin*,1,2 Luo Yunjun*,2Yu Huaiqing1 (1 College of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081) (2 College of Material Science and Engineering, Shandong University of Technology, Zibo 255049) Chimica Sinica Vol. 68, 2010, No.19, 1971 ~ 1976