公开(公告)号：US09567440B2

公开(公告)日：2017-02-14

申请号：US14655326

申请日：2013-10-29

申请人： ZHEJIANG NHU SPECIAL MATERIALS CO., LTD. ,  ZHEJIANG UNIVERSITY ,  SHANGYU NHU BIOLOGICAL CHEMICAL CO., LTD. ,  ZHEJIANG NHU COMPANY LTD.

发明人： Zhirong Chen ,  Woyuan Li ,  Haoran Li ,  Ming Lian ,  Hong Yin ,  Guiyang Zhou ,  Xinfeng Zheng

IPC分类号： C08G75/16 ,  C08G75/00 ,  C08G75/02

CPC分类号： C08G75/16 ,  C08G75/02

摘要： The present invention discloses a fiber-grade polyphenylene sulfide resin synthesis method, taking sodium bisulfide and p-dichlorobenzene as raw materials, N-methyl pyrrolidone as the solvent and C5-C6 fatty acid salt formed through dehydration to C5-C6 fatty acid and sodium hydroxide as the polymerization additive for synthesis through polymerization. White polyphenylene sulfide resin is obtained through acidification and washing of reaction slurry. In view of the fact that MFR is below 125 g/10 min, weight-average molecular weight as measured by GPC is over 4.2×104, and whiteness is over 90, it can satisfy requirements for fiber polyphenylene sulfide resin. C5-C6 fatty acid salt according to the method of the present invention has a higher solubility in NMP, which can better promote polymerization. It is to be fully diverted into the filtrate after filter prior to conversion into free fatty acid again through acidification with hydrochloric acid. C5-C6 fatty acid is available for azeotropy with water, which has a limited solubility in water. Therefore, it is applicable to recycle C5-C6 fatty acid from the filtrate through azeotropy with water, and thereby solve the problem with separation of additive and sodium chloride that are soluble in water.

摘要翻译： 本发明公开了以二硫化二钠和对二氯苯为原料的纤维级聚苯硫醚树脂的合成方法，将N-甲基吡咯烷酮作为溶剂和通过脱水形成C5-C6脂肪酸和 氢氧化物作为通过聚合合成的聚合添加剂。 白色聚苯硫醚树脂通过反应浆液的酸化和洗涤得到。 鉴于MFR低于125g / 10min，通过GPC测得的重均分子量超过4.2×104，白度超过90，可以满足纤维聚苯硫醚树脂的要求。 根据本发明方法的C5-C6脂肪酸盐在NMP中的溶解度较高，可以更好地促进聚合。 过滤后将其全部转入滤液，然后再用盐酸酸化再转化成游离脂肪酸。 C5-C6脂肪酸可与水共沸，其在水中的溶解度有限。 因此，适用于通过与水共沸从滤液中回收C5-C6脂肪酸，从而解决了可溶于水的添加剂和氯化钠的分离问题。

公开(公告)号：US11440996B2

公开(公告)日：2022-09-13

申请号：US16957934

申请日：2018-07-12

申请人： ZHEJIANG NHU COMPANY LTD. ,  ZHEJIANG UNIVERSITY ,  ZHEJIANG NHU SPECIAL MATERIALS CO., LTD.

发明人： Woyuan Li ,  Hong Yin ,  Zhirong Chen ,  Baishan Hu ,  Guiyang Zhou ,  Hangjun Deng ,  Ming Lian ,  Xiongwei Zhang ,  Qichuan Li ,  Jiang Zhao

IPC分类号： C08G75/0254 ,  C08G75/0213 ,  C08G75/029

摘要： A preparation method of a polyphenylene sulfide resin, and a polyphenylene sulfide resin prepared by the method using a sulfur-containing compound, an alkaline substance and p-dichlorobenzene as raw materials, a fatty acid as a polycondensation aid to carry out a polycondensation reaction. After purification treatment, a primary polyphenylene sulfide is obtained, which then reacts with a terminal-group adjusting agent at a high temperature to generate the polyphenylene sulfide resin resulting in high yield and low cost. The prepared polyphenylene sulfide resin has high reactivity, high melting crystallization temperature and excellent thermal stability. The resulting polyphenylene sulfide resin can be directly used for extrusion and injection molding.

公开(公告)号：US20200055985A1

公开(公告)日：2020-02-20

申请号：US15779414

申请日：2017-06-29

申请人： ZHEJIANG NHU SPECIAL MATERIALS CO., LTD. ,  Zhejiang University ,  ZHEJIANG NHU COMPANY LTD.

发明人： Zhirong Chen ,  Hong Yin ,  Qin Zhang ,  Xiaoxiao Wu ,  Wengang Hong ,  Hangjun Deng ,  Guiyang Zhou ,  Changze Wang

IPC分类号： C08G69/28 ,  C08G69/26 ,  C08L77/08

摘要： The present disclosure provides a production method of a semi-aromatic polyamide, and a semi-aromatic polyamide. Said production method of a semi-aromatic polyamide includes: step 1 of subjecting an initial charge of a diamine and a binary acid in an amine/acid molar ratio of less than 1.0 to form a slurry together with water and a catalyst, and subjecting the slurry to heating and dissolution to form a saline solution; step 2 of dehydrating said saline solution after detecting the composition thereof, detecting the content of diamine in a steam condensate from a dehydration unit, adjusting the amine/acid molar ratio to be larger than 1.0 by a molten diamine and a monoacid as a molecular weight regulator, and performing pre-polymerization; and step 3 of subjecting a pre-polymerization solution to post-polycondensation after vacuum flashing. The semi-aromatic polyamide of the present disclosure has a low gel content, excellent performance and extensive scope of application.

公开(公告)号：US20240336560A1

公开(公告)日：2024-10-10

申请号：US17800452

申请日：2022-06-21

申请人： ZHEJIANG UNIVERSITY ,  ZHEJIANG NHU CO., LTD. ,  ZHEJIANG NHU SPECIAL MATERIALS CO., LTD. ,  ZHEJIANG NHU NYLON MATERIALS CO., LTD.

发明人： Zhirong Chen ,  Wenbin Wu ,  Hong Yin ,  Zengshi Zha ,  Keyan Wang ,  Li Ma ,  Guodong Huang ,  Guiyang Zhou ,  Yong Xu

IPC分类号： C07C253/10 ,  B01J31/18 ,  B01J37/04 ,  C07F9/06 ,  C07F9/6571

CPC分类号： C07C253/10 ,  B01J31/185 ,  B01J37/04 ,  C07F9/062 ,  C07F9/6571 ,  B01J2231/322 ,  B01J2231/52 ,  B01J2531/004 ,  B01J2531/847

摘要： A multidentate phosphite ligand is used in the catalytic synthesis of adiponitrile. The ligand is represented by the following general formula (I). The method of catalytic synthesis of adiponitrile comprises primary hydrocyanation, isomerization, and secondary hydrocyanation reactions, wherein the catalyst adopted each comprises a phosphite ligand-nickel complex composed of a nickel precursor and a multidentate phosphite ligand. The ligand molecule has a higher electron cloud density, and the phosphorus content capable of participating in coordination in the ligand molecule per unit mass is higher, so that the catalytic activity of the catalyst is improved, and the amount of the catalyst is reduced.

公开(公告)号：US20220025120A1

公开(公告)日：2022-01-27

申请号：US17416587

申请日：2019-11-20

申请人： ZHEJIANG UNIVERSITY ,  ZHEJIANG NHU SPECIAL MATERIALS CO., LTD. ,  ZHEJIANG NHU CO., LTD.

发明人： Zhirong Chen ,  Hong Yin ,  Hangjun Deng ,  Guiyang Zhou ,  Danqi Zhu ,  Xiaoxiao Wu ,  Wengang Hong ,  Guisheng Qiu ,  Qichuan Li

IPC分类号： C08G69/48 ,  C08G69/26 ,  C08G69/28 ,  C08L77/06

摘要： The present disclosure discloses a semi-aromatic polyamide and a preparation method therefor. The semi-aromatic polyamide is obtained by polymerization reaction using a diamine, a dibasic acid and a monoacid as main raw materials while adding a special end-capping agent. The semi-aromatic polyamide prepared according to the present disclosure has good thermal stability, a yellowness index of less than 20, a glass transition temperature of 90° C. or above, and a melting point of 300° C. or above, and can be applied to spare parts for fuel pipelines in automobiles, and electronic and electrical industries such as LED panels.