Carpoly Chemical Group Co.

Jiangmen, China

Carpoly Chemical Group Co.

Jiangmen, China
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Huang S.,South China University of Technology | Xiao J.,South China University of Technology | Zhu Y.,Carpoly Chemical Group Co. | Qu J.,South China University of Technology
Journal of Coatings Technology Research | Year: 2017

A series of multiarm star hydroxyl-terminated polyesters (MHPs) were synthesized through a “one-pot” method with di-trimethylolpropane as the core molecule, 2,2-dimethylolpropionic acid as the AB2-type monomer, ε-caprolactone, and monocarboxylic acids as modifiers. The influence of different monocarboxylic acids on the viscosities of polyesters and their 2K-PU films hardness was studied and it was found that MHPs prepared from lauric acid displayed the higher films hardness and lower viscosities. IR spectra of MHPs disclosed the ring-opening reaction between ε-caprolactone and hydroxyl groups occurred. 1H NMR spectra demonstrated that the molecular structures of MHPs were irregular due to the multiplicity of reaction processes. The measured number-average molecular weights (Mn) of MHPs were around 715–1854 g/mol with the PDI of 1.45–2.05. MHPs exhibited lower viscosities in the range of 3304–9060 mPa s at 100% solid contents and possessed lower intrinsic viscosities compared with linear polymers of similar molecular weight. The cured films of MHPs exhibited excellent impact resistance, adhesion, flexibility, and high hardness and displayed good thermal stability with 5% weight loss at 280°C. The solution viscosities of MHPs were less than 450 mPa s at 80% solid contents, and the VOC contents of 2K-PU coatings obtained from MHPs were low to 300 g/L. © 2017 American Coatings Association


Huang S.,South China University of Technology | Xiao J.,South China University of Technology | Zhu Y.,Carpoly Chemical Group Co. | Qu J.,South China University of Technology
Progress in Organic Coatings | Year: 2017

A series of polycaprolactone (PCL) polyols was synthesized via the ring-opening reaction of ε-caprolactone initiated by small molecular polyols including ethylene glycol (EG), 1,4-butanediol (BDO), diethylene glycol (DEG), neopentyl glycol (NPG), 2,4-diethyl-1,5-pentanediol (PD-9), 1,4-cyclohexanedimethanol (CHDM), trimethylolpropane (TMP), di-trimethylolpropane (Di-TMP), di-pentaerythritol (Di-PE) and maltitol. IR and 1H NMR spectra of PCLs disclosed that ε-caprolactone reacted with the hydroxyl groups of small molecular polyols, then the target PCLs were successfully prepared and possessed similar molecular skeleton structures. The GPC data summarized the measured number-average molecular weights of PCLs approached to their theoretical values, and the polydispersity indexes (PDI) were ranged from 1.35 to 1.58. PCLs prepared with maltitol displayed the highest viscosity up to 42000 mPa s, while products obtained from diol substrates including EG, BDO, DEG, NPG and PD-9 exhibited the lower viscosities in the range of 160–300 mPa s. The cured films of PCLs prepared from polyisocyanate curing agents exhibited good impact resistance, adhesion, flexibility, higher hardness and displayed better thermal stability with 5% weight loss at 260 °C. PCLs obtained from TMP (PCL-7, TMP/3ε-CL) and Di-TMP (PCL-8, Di-TMP/4ε-CL) exhibited the higher films hardness and lower viscosities at 100% solid content. The viscosities of PCL-7 and PCL-8 were 1320 and 3900 mPa s, respectively, and the VOC contents of spray-applied 2K-PU coatings prepared from PCL-7 and PCL-8 were low to 180 g/L. © 2017 Elsevier B.V.


Wang Y.,South China University of Technology | Zhu Y.,Carpoly Chemical Group Co. | Qu J.,South China University of Technology
Huagong Xuebao/CIESC Journal | Year: 2013

The second generation hyperbranched polyester(HBP-0) was synthesized by the pseudo-one step method with 2, 2-bis(hydroxyl-methyl) propionic acid as AB2 monomer, trimethylolpropane as core monomer and p-toluene sulfonic acid as catalyst. HBP-0 was modified with ε-caprolactone and lauric acid to prepare modified hyperbranched polyesters(HBP-1, HBP-2, and HBP-3). The structure and molecular weight of HBPs were characterized by FT-IR, 1H NMR and GPC. HBP-0 was synthesized with 0.43 degree of branching and its molecular weight approached the theoretical value and distribution factor was 1.72. The film properties of modified HBPs cured by toluene diisocyanate adduct were studied, and the results showed that the modified HBPs displayed excellent film properties in the gross, impact resistance, adhesion and flexibility. HBP-3 modified by both ε-caprolactone and lauric acid exhibited the best properties, including lowest viscosity up to 7500 mPa·s, surface drying time of 40 min and pencil hardness of F. While the corresponding data of HBP-1 and HBP-2 modified only by ε-caprolactone or lauric acid were 7×105 mPa·s, 20 min and HB; 17500 mPa·s, 90 min and 2B, respectively.


Yan M.,South China University of Technology | Zhu Y.,Carpoly Chemical Group Co. | Qu J.,South China University of Technology
Huagong Xuebao/CIESC Journal | Year: 2014

The novel hydrophilic monomers trimethylolpropane phthalate esters (TMPPs), trimethylolpropane monoesters of maleic acid (TMPMs) and trimethylolpropane succinic monoester(TMPSs) were synthesized by esterification of trimethylolpropane(TMP) with phthalic anhydride(PA), maleic anhydride(MA) and succinic anhydride(SA), respectively. Then the anionic/non-ionic aqueous polyurethane dispersions (PUD) were synthesized by the prepolymer process using the novel hydrophilic monomers and polyoxyethylene ether (Ymer™ N120) as compounding hydrophilic component. The effects of the type of hydrophilic monomers and mass ratio of TMPPs/N120 on the chemical resistance, hardness, mechanical properties and thermal stability of PUD films were studied. The storage stability, film hardness, water- and alcohol- resistance of PUD prepared from TMPPs were better than those from TMPMs and TMPSs. With increasing TMPPs/N120 mass ratio, the tensile strength of PUD film increased, elongation at break decreased, PUD film hardness increased and alcohol-resistance became good, while PUD solids contents decreased. The optimal mass ratio of TMPPs and N120 ranged from 6:5 to 4:8. Compared with DMPA, TMPPs could improve the hardness and thermal stability of PUD films, and significantly strengthened stain resistance, including resistance to ink, coffee, tea and wine. Therefore, TMPPs is a good hydrophilic compound to prepare PUD. © All Rights Reserved.


Wang Y.,South China University of Technology | Zhu Y.-A.,Carpoly Chemical Group Co. | Kong X.,Carpoly Chemical Group Co. | Qu J.-Q.,South China University of Technology
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | Year: 2013

The third generation hyperbranched polyesters (HBPs) were synthesized by the pseudo-one step method with 2, 2-bis(hydroxyl-methyl) propionic acid as AB2 monomer, p-toluene sulfonic acid as catalyst, in which 2-butyl-2-ethyl-1, 3-propanediol (BEPD, HBP-1), 1, 4-butanediol (BDO, HBP-2), and neopentyl glycol (NPG, HBP-3) were used as the core monomers, respectively. The structures and molecular weights of HBPs were characterized with FT-IR, NMR and GPC as well as their intrinsic viscosities were also given. The film properties of HBPs cured by the toluene diisocyanate adduct were tested. The thermal stability of cured HBPs films were also examined by thermogravimetric analysis (TGA). It was found that HBPs are successfully synthesized and HBP-1 displays the highest branching degree up to 0.55. The GPC measured molecular weights of HBPs approach to the theoretical values, and HBP-1 exhibits the lowest polydispersity index up to 1.68. HBPs are soluble in strong polar solvents and insoluble in non-polar solvents and HBP-1 displays better solubility and lower intrinsic viscosity up to 4.24 mL · g-1. The cured HBPs films exhibit good thermal stability, adhesion, flexibility, and high hardness.


Xu X.,South China University of Technology | Zhong S.,South China University of Technology | Zhu Y.,Carpoly Chemical Group Co. | Qu J.,South China University of Technology
Huagong Xuebao/CIESC Journal | Year: 2016

The novel diol chain-extender trimethylol propane monolaurate (TMPLA) was synthesized to prepare novel polyurethane aqueous dispersions (n-PUD),which was used as a coalescent to assist the film forming of high Tg polyacrylate emulsion. Effects of NCO/OH molar ratio, soft/hard segment contents and molar ratio of TMPLA/BDO on assistant-film-forming performance of n-PUD were studied. It was found that the assistant-film-forming ability of PUD was increased with decreasing of NCO/OH molar ratio and hard segment proportions. PUDs modified with TMPLA displayed good assistant-film-forming ability. The optimized conditions to prepare assistant-film-forming n-PUD were as follows: molar ratios of TMPLA/BDO and NCO/OH were 4/2 and 1.3, respectively, mass ratio of soft/hard segment was 55/45, and then the blended latex with m(PUD)/m(PA) 25/75 can form a continuous transparent film at 5℃ without coalescent with a VOC content as low as 30 g·L-1. © All Right Reserved.


Wang Y.,South China University of Technology | Kong X.,Carpoly Chemical Group Co. | Zhu Y.,Carpoly Chemical Group Co. | Qu J.,South China University of Technology
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2013

Third generation hyperbranched polyester (HBP-3) was synthesized by the pseudo-one step method using 2, 2-bis(hydroxyl-methyl) propionic acid as AB2 monomer, and trimethylolpropane as a core monomer, Then HBP-3 was modified with lauric acid and benzoic acid to get HBP-4, HBP-5, HBP-6 and HBP-7. The structure and molecular weight of HBP-3 were characterized by FT-IR, 1H-NMR and GPC. The results show that HBP-3 was successfully synthesized with the branching degree of 0.44, the intrinsic viscosity of 6.35 mL/g and the polydispersity of 1.75, and the molecular weight approaches the theoretical value. The film performances of modified HBPs cured with the toluene diisocyanate trimer were tested. It is found that HBP-3 solely modified with lauric acid exhibits poor film harness and adhesion, HBP-3 modified with benzoic acid possesses great viscosity (solid state at r. t.), while HBP film modified with lauric acid and benzoic acid displays high gloss, excellent adhesion and flexibility.


Xu X.,South China University of Technology | Zhong S.-F.,South China University of Technology | Zhu Y.-A.,Carpoly Chemical Group Co. | Qu J.-Q.,South China University of Technology
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | Year: 2016

Reducing volatile organic compounds (VOC) contents in waterborne wood coatings is challenging. Modified aqueous polyurethane dispersion (b-PUD) was prepared by blocking polyurethane prepolymer with monohydric alcohol. The effects of blocking agent category, NCO blocked percentage, NCO/OH molar ratio and soft segment polyol type on assistant-film-forming performance of b-PUD were discussed. The results show that b-PUD modified by dipropylene glycol butyl ether (DPnB) has the best assistant-film-forming ability which increases with the increase of blocked percentage. In addition, the assistant-film-forming ability of b-PUD with polyether glycol as the soft segment is better than that of polyester glycol, and polyether N210 shows the best performance. When NCO blocked percentage is 80%, molar ratio of NCO/OH is 1.5 and b-PUD adding percentage is 25%, the minimum film forming temperature (MFT) of the composite emulsion is 2.9℃ and the VOC content of the waterborne transparent primer based on b-PUD is 28 g·L-1. This coating has excellent sanding property and high transparency. © 2016, Editorial Board of “Journal of Chemical Engineering of Chinese Universities”. All right reserved.


Yan M.-X.,South China University of Technology | Zhu Y.-A.,Carpoly Chemical Group Co. | Qu J.-Q.,South China University of Technology
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | Year: 2014

The modified anionic/non-ionic aqueous polyurethane dispersions (PUD) were synthesized by using dimethylolpropionic acid (DMPA) and a new polyoxyethylene ether (Ymer™ N120) as compound hydrophilic components, aldehyde resin (A81), polyether glycol (N220) and isophoronediisocyanate (IPDI) as raw materials. The effects of mass ratios of DMPA/N120, amount of A81 and molar ratios of NCO/OH on the properties of PUD and PUD film were investigated. It was found that the hardness, gloss and chemical resistance (especially resistance to alcohol) of PUD films were improved with the addition of aldehyde resin A81. The PUD films exhibit excellent hardness and resistances to water and chemicals when the amount of A81 is 5%, mass ratio of DMPA/N120 is 0.4 and molar ratio of NCO/OH is 1.5. Thermal gravimetric analysis (TGA) shows that the modified PUD films possess good thermal stability. Compared with conventional PUD, the modified PUD has a good comprehensive performance. ©, 2014, Zhejiang University. All right reserved.


Yang Z.,South China University of Technology | Shen H.,South China University of Technology | Shen D.,South China University of Technology | Liu W.,Carpoly Chemical Group Co.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2015

Introducing polymerizable emulsifiers, styrene-acrylate emulsions with latex particles of three different morphology structures were prepared by semi-continuo us emulsion polymerization. The effects of emulsifiers, glass transition temperature (Tg) of copolymer, morphology structure of latex particles and methacrylic acid (MAA) content on the freeze-thaw (F/T) stability of latex were studied. Then a freeze-thaw stabilization mechanism was proposed and the interaction principle of above mentioned factors was elucidated based on the mechanism. The results show that introduction of polymerizable emulsifiers and carboxylation of the carboxyl groups are beneficial to improving the F/T stability of emulsion. It is also clarified that compared to latex particles with hard core/so ft shell structure or homogeneous structure, latex particles with soft core/hard shell structure are propitious to the F/T stability of emulsion and the F/T cycles of emulsion increase with increase of Tg of shell polymer. ©, 2015, Chengdu University of Science and Technology. All right reserved.

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