Kingfa Sci.&tech.co., Ltd.

China Railway Tunnel Group Co., Ltd.

Kingfa Science & Technology Co., Ltd.

Shanghai Kingfa Science & Technology Co., Ltd

Zhuhai Vanteque Specialty Engineering Plastics Co., Ltd.

China Railway Tunnel Group Third Division Co., Ltd.

Canton Litho Material Technology Inc.

Shanghai Kingfa Sci.&tech.dvpt.co., Ltd.

Min Cao

Xianbo Huang

Chuanhui Zhang

Tongmin Cai

Xiangbin Zeng

Xin Zhang

Nanbiao Ye

Mingqin Chen

Shiyong Xia

Kun Yan

Sujun Jiang

Huan Chang

Ning Ma

Hai Deng

Xin Wen

Xianhai Tang

Baixi Feng

Jialiang Ding

Fuxian Yu

Huiwen Ding

Zhongquan Peng

Mujun Huang

Liming Fan

Xueke Sun

Zhenguo Shi

Mingchen Xie

A resin including a highly sequenced copolymer is presented, and the preparation and application of its resist composition is presented. The resist has excellent performance and can promote the development of integrated circuits.

Highly sequenced copolymer for dual-tone photoresists, resist composition and patterning process thereof

The invention discloses a flame-retardant semi-aromatic polyamide derived from the following monomers: a diacid monomer A: where A1 is terephthalic acid or terephthalic acid and other diacid, terephthalic acid accounts for 50 to 100 mol % of A1, and A2 is [(6-oxido-6H-dibenzo-(c,e)(1,2)-oxaphosphorin-6-ketone)-methyl]-butanedioic acid, A1+A2=100 mol %, A1=90 to 99 mol %, A2=1 to 10 mol %; and diamine monomer B: one or more of diamine monomers containing 4 to 36 carbon atoms. In the present invention, by an in situ polymerization, a specific flame-retardant monomer [(6-oxido-6H-dibenzo-(c,e)(1,2)-oxaphosphorin-6-ketone)-methyl]-butanedioic acid is copolymerized in a semi-aromatic polyamide chain segment, excellent mechanical properties and low water absorption can be obtained.

Flame-retardant semi-aromatic polyamide and preparation method thereof

The present application relates to a top plate jacking device and jacking construction method configured for V-shaped columns, the top plate jacking device comprising a temporary support pile comprises a plurality of pile holes arranged on a construction surface, a bottom end of the pile hole is cast-in-place with a bearing platform, a temporary support column is inserted on the bearing platform, a plurality of pillars are fixed at a top of the temporary support column, wherein comprises a plurality of vertically connected column segments, two adjacent column segments detachably connected vertically through a connecting component; a support block is provided at a top of the plurality of pillars, the top of the support block abuts against a lower surface of the top plate; a hydraulic jack is configured to jack the top plate and is provided with a plurality of intervals at the top of the temporary support column.

Top plate jacking device and jacking construction method configured for V-shaped columns

A semiaromatic copolyamide resin and a polyamide molding composition consisting of the same are provided, consisting of following repeat units: (A) 26-80 mol % of units derived from para-amino benzoic acid; (B) 4-70 mol % of units derived from 11-aminoundecanoic acid or undecanolactam, and 0-70 mol % of units derived from another amino acids having 6 to 36 carbon atoms or units consisting of a lactam having 6-36 carbon atoms; (C) 0-37 mol % of units derived from a diamine unit having 4 to 36 carbon atoms; and (D) 0-37 mol % of units derived from a diacid unit having 6 to 36 carbon atoms; wherein, (A)+(B)+(C)+(D)=100 mol %; and molar contents of the units derived from para-amino benzoic acid and those derived from 11-aminoundecanoic acid or undecanolactam are not equal to 50 mol % simultaneously.

Semiaromatic copolyamide resin and polyamide molding composition consisting of the same

The present invention relates to a semi-aromatic polyamide and a method for preparing it with low wastewater discharge. The semi-aromatic polyamide for the present invention is obtained by introducing aromatic dicarboxylic acid, aliphatic diamine containing 4&#x2dc;14 carbon atoms and the wastewater generated during the previous prepolymerization into an autoclave for prepolymerization reaction and then further polymerizing the prepolymer. In this preparation method, the wastewater generated during polymerization is recycled, thus greatly reducing the wastewater discharge; the raw materials in the wastewater are effectively recycled, thus improving the utilization rate of raw materials; meanwhile, the diamine in the wastewater compensates that lost along with water discharge during prepolymerization, thus ensuring the Mole ratio balance between dicarboxylic acid monomer and diamine monomer.

Semi-aromatic polyamide and a method for preparation with low wastewater discharge

Growing community of inventors

Guangdong, China

Min Cao