公开(公告)号：US09988505B2

公开(公告)日：2018-06-05

申请号：US14924302

申请日：2015-10-27

申请人： CHINA PETROLEUM & CHEMICAL CORPORATION ,  BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION

发明人： Dali Gao ,  Hongwei Shi ,  Shijun Zhang ,  Meifang Guo ,  Luqiang Yu ,  Jinliang Qiao ,  Ruxian Li ,  Yujing Tang ,  Jianjun Yin ,  Liangshi Wang ,  Honghong Huang ,  Qingquan Yang ,  Hao Zou ,  Jie Li ,  Liying Zhang ,  Hua Yin ,  Jianye Liu ,  Jingbo Shao ,  Mingfu Lyu ,  Liqiu Chu ,  Meng Xu ,  Hui Quan ,  Kai Xu ,  Mu Dong ,  Yun Lyu ,  Yihui Xu ,  Yaohui Xu ,  Peng Guo ,  Yiqing Bai

IPC分类号： B32B27/32 ,  B32B27/08 ,  C08L23/00 ,  C08F210/00 ,  C08J5/18 ,  C08L23/08 ,  B32B27/18

CPC分类号： C08J5/18 ,  B32B27/08 ,  B32B27/18 ,  B32B27/32 ,  B32B27/327 ,  B32B2250/24 ,  B32B2270/00 ,  B32B2307/406 ,  B32B2307/412 ,  B32B2307/518 ,  B32B2307/54 ,  B32B2307/558 ,  B32B2307/72 ,  B32B2410/00 ,  B32B2439/00 ,  B32B2439/06 ,  B32B2439/46 ,  C08J2323/06 ,  C08J2323/08 ,  C08L23/08 ,  C08L2203/16 ,  C08L2203/30 ,  C08L2205/025 ,  C08L2205/03

摘要： A polyethylene composition comprising an ethylene/α-olefin copolymerized linear low density polyethylene, wherein the polyethylene composition has a Mw of from 100,000 g/mol to 200,000 g/mol, a Mw/Mn of from 4.0 to 9.0, a Mz/Mw of from 4.0 to 7.0, and a Mz+1/Mw of from 4.5 to 13.5, is provided. A film formed of the polyethylene composition is also provided.

公开(公告)号：US10920025B2

公开(公告)日：2021-02-16

申请号：US15768429

申请日：2016-04-15

申请人： CHINA PETROLEUM & CHEMICAL CORPORATION ,  BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION

发明人： Jianye Liu ,  Shijun Zhang ,  Liqiu Chu ,  Liying Zhang ,  Hao Zou ,  Mu Dong ,  Dali Gao ,  Baige Chou ,  Jingbo Shao ,  Yun Lyu ,  Hua Yin ,  Qingquan Yang ,  Jie Li ,  Yiqing Bai ,  Yihui Xu

IPC分类号： C08J3/14 ,  B33Y70/00 ,  B29B9/10 ,  B29B13/00 ,  B29B13/02 ,  B29B13/04 ,  B29B13/06 ,  C08F6/12 ,  C08F110/02 ,  C08F110/06 ,  C08K3/22 ,  C08K3/34 ,  C08K3/36 ,  C08L23/12 ,  B33Y10/00 ,  B29C64/153 ,  B22F1/00 ,  B29B9/12 ,  B29K23/00 ,  B29K105/00

摘要： A method for preparing a polyolefin resin powder has the steps of a) heat dissolving a polyolefin resin in an organic solvent having a solubility parameter less than or equal to the solubility parameter of the polyolefin resin to obtain a polyolefin resin solution; b) cooling the polyolefin resin solution to precipitate a solid, thereby obtaining a solid-liquid mixture; c) optionally adding an adjuvant to the solid-liquid mixture and mixing; and d) conducting solid-liquid separation and drying to obtain a polyolefin resin powder suitable for selective laser sintering. The difference between the solubility parameters of the organic solvent and of the polyolefin resin is within 0-20% of the solubility parameter of the polyolefin resin.
The polyolefin resin powder obtained according to this method has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution.

公开(公告)号：US10787546B2

公开(公告)日：2020-09-29

申请号：US15953062

申请日：2018-04-13

申请人： CHINA PETROLEUM & CHEMICAL CORPORATION ,  BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION

发明人： Jianye Liu ,  Liqiu Chu ,  Yun Lyu ,  Shijun Zhang ,  Liying Zhang ,  Hao Zou ,  Mu Dong ,  Dali Gao ,  Baige Chou ,  Yiqing Bai ,  Jingbo Shao ,  Meng Xu ,  Yihui Xu ,  Ruoshi Chen

IPC分类号： C08J3/14 ,  B29C67/00 ,  C08L67/04 ,  C08J3/21 ,  C08G63/88 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/153 ,  C08G63/08 ,  C08G63/12 ,  C08J3/09 ,  C08J3/11 ,  B29K67/00

摘要： A method for preparing an aliphatic polyester resin powder includes the steps ofa) heat dissolving a crystalline aliphatic polyester resin in an organic solvent to obtain an aliphatic polyester resin solution;b) cooling the aliphatic polyester resin solution to precipitate a solid, thereby obtaining a solid-liquid mixture;c) optionally adding an adjuvant to the solid-liquid mixture and mixing; andd) conducting solid-liquid separation and drying to obtain an aliphatic polyester resin powder suitable for selective laser sintering.The crystalline aliphatic polyester resin powder obtained has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution. The aliphatic polyester resin powder is particularly suitable for selective laser sintering method.