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1.发明公开公开(公告)号：US20240150523A1
公开(公告)日：2024-05-09
申请号：US18412986
申请日：2024-01-15
发明人： Wutong FENG , Yuanbo ZHAO , Xiucai LIU
CPC分类号： C08G69/265 , C08G69/28
摘要： The present disclosure provides a semi-aromatic copolyamide, its preparation method, compositions, and a molded product thereof. The semi-aromatic copolyamide is formed from raw materials including diacid monomers and diamine monomers. The diacid monomers include aromatic diacid or derivatives of the aromatic diacid and aliphatic diacid. The diamine monomers include decamethylene diamine and pentamethylene diamine. The molar ratio of the decamethylene diamine to the pentamethylene diamine is in a range of 1:1 to 30:1.
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公开(公告)号：US20230203431A1
公开(公告)日：2023-06-29
申请号：US17769459
申请日：2020-01-16
发明人： Jianglin WANG , Wei LI , Qinpei LI , Wenxiao JIANG , Shuya MIN , Xiucai LIU
CPC分类号： C12N1/165 , C12P7/44 , C12R2001/74
摘要： Provided are a Candida tropicalis strain Am2525, with the preservation number thereof being CCTCC NO: M 2019419, and a method for producing long-chain dicarboxylic acids by means of fermenting the strain. The method for producing the long-chain dicarboxylic acids comprises preparing a seed solution by means of the Candida tropicalis strain Am2525 and producing the long-chain dicarboxylic acids via fermentation of the seed solution. Compared with the parent, the Candida tropicalis strain Am2525 has an enhanced resistance to the toxicity of a substrate decane, improves the productivity of long-chain dicarboxylic acids, reduces the cost of production, subsequent separation and purification are simple, and the fermentation production process is easy to implement on a large scale.
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3.发明申请公开(公告)号：US20200157152A1
公开(公告)日：2020-05-21
申请号：US16738663
申请日：2020-01-09
发明人： Howard CHOU , Naiqiang LI , Xiucai LIU
摘要： One aspect provided herein relates to lysine decarboxylase polypeptides comprising mutants of SEQ ID NO: 2 (i.e., mutants of Klebsiella oxytoca (K. oxytoca) Ldc) and/or fragments thereof. In certain embodiments, the mutants or fragments thereof may have at least about 95% sequence identity with SEQ ID NO: 2. Another aspect provided herein relates to a DNA polynucleotide comprising one or more lysine decarboxylase nucleotide sequences of mutants of SEQ ID NO: 1 (i.e., mutants of K. oxytoca ldc), fragments thereof, or fragments of SEQ ID NO: 1 (i.e., fragments of K. oxytoca ldc). In certain embodiments, the DNA polynucleotide as disclosed herein may encode one or more lysine decarboxylase polypeptides provided herein. In certain embodiments, the DNA polynucleotide as disclosed herein may encode SEQ ID NO: 2, mutants, and/or fragments thereof. In certain embodiments, the lysine decarboxylase nucleotide sequences provided herein may have at least 95% sequence identity with SEQ ID NO: 1 or SEQ ID NO: 3. Another aspect provided herein relates to expression vectors comprising the DNA polynucleotides described herein used for production of a lysine-derived product. Other aspects provided herein include transformants, mutant host cells, methods for the production of lysine decarboxylases, and methods for the production of a lysine-derived product.
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公开(公告)号：US20240209149A1
公开(公告)日：2024-06-27
申请号：US18583132
申请日：2024-02-21
发明人： Xiaohui ZHOU , Xiucai LIU
IPC分类号： C08G69/40
CPC分类号： C08G69/40
摘要： A bio-based polyamide elastomer and a preparation method therefor. The bio-based polyamide elastomer is prepared using specific aliphatic diacid and pentanediamine prepared by biological methods as monomers. The polyamide elastomer of the present disclosure has excellent performance and stable monomer supply, solves the problem of excessively high cost of polyamide elastomer, expands the application scenarios of elastomers, and has high commercial value.
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公开(公告)号：US20220389623A1
公开(公告)日：2022-12-08
申请号：US17769779
申请日：2020-01-15
申请人： CATHAY BIOTECH INC. , CIBT America Inc. , CATHAY (JINXIANG) BIOMATERIAL CO., LTD. , CATHAY (WUSU) BIOMATERIAL CO., LTD.
发明人： Chaoxu SUN , Xiucai LIU
摘要： The present invention relates to the technical field of polyamide materials, and specifically relates to a polyamide sea-island fiber and a process for producing the same and the use thereof. In the polyamide sea-island fiber, the island component is a polyamide resin selected from one of polyamide 56, polyamide 510, polyamide 511, polyamide 512, polyamide 513, polyamide 514, polyamide 515 and polyamide 516, preferably polyamide 56 or polyamide 510; the sea component is one of polyethylene, low-density polyethylene, polystyrene, water-soluble polyesters, polyesters and polyurethanes, preferably polyethylene, low-density polyethylene or water-soluble polyester. The polyamide sea-island fiber of the present invention has better mechanical properties, better softness, good dyeing properties, high grade of dyeing grey scale, high dye uptake, high dyeing depth and high color fastness.
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公开(公告)号：US20220282404A1
公开(公告)日：2022-09-08
申请号：US17637093
申请日：2020-01-15
发明人： Chaoxu SUN , Xiucai LIU
摘要： The present invention relates to the technical field of polyamide materials, and provides a polyamide 56 pre-oriented yarn and a polyamide 56 draw textured yarn with a low shrinkage in boiling water, a process for producing the same and a use thereof. The raw materials for producing the polyamide 56 fiber comprise 1,5-pentane diamine and adipic acid, or a polyamide 56 resin obtained by polymerizing 1,5-pentane diamine monomer and adipic acid monomer; wherein the polyamide 56 fiber has a shrinkage in boiling water of 9% or less, wherein the polyamide 56 fiber comprises a polyamide 56 pre-oriented yarn with a low shrinkage in boiling water and a polyamide 56 draw textured yarn with a low shrinkage in boiling water. The polyamide 56 fiber has good mechanical properties, dyeing uniformity and dimensional stability. The process for producing the polyamide 56 fiber does not require modification to existing equipments for texturing polyamide fibers and thus reduces production costs.
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公开(公告)号：US20210054423A1
公开(公告)日：2021-02-25
申请号：US16961106
申请日：2018-01-09
发明人： Howard CHOU , Ling CHEN , Yunfeng LEI , Xiucai LIU
摘要： The invention provides microorganisms genetically modified to overexpress biofilm dispersal related polypeptides to enhance the production of lysine and lysine derivatives by the microorganism, method of generating such microorganism, and methods of producing lysine and lysine derivatives using the genetically modified microorganisms.
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公开(公告)号：US20240270906A1
公开(公告)日：2024-08-15
申请号：US18567921
申请日：2022-01-14
发明人： Bingbing QIN , Chaoxu SUN , Yuanyan GAO , Xiucai LIU
CPC分类号： C08G69/36 , C08G69/04 , C08G69/28 , D01D5/088 , D01F6/60 , D02G3/02 , D02G3/34 , D10B2331/02 , D10B2401/04 , D10B2401/063
摘要： The present disclosure provides a polyamide resin and a preparation method therefor, a composition, and a fiber product. The polyamide comprises diamine structural units and diacid structural units, wherein 90 mol % or more of the diacid structural units are derived from adipic acid, 90 mol % or more of the diamine structural units are derived from 1,5-pentanediamine, and the polyamide resin contains a water-extractable substance in a content of 0.7 wt. % or less. The water-extractable substance has a number average molecular weight of 2000 or less. The preparation method of the polyamide resin of the present disclosure is simple without using large-scale equipment, and the process parameters thereof are easy to control, thereby facilitating mass production thereof. The polyamide resin of the present disclosure has a long spinneret wipe cycle time and less broken filament times, and the obtained fiber has less broken filaments, low yarn unevenness, less dyed dark grain, a good dyeing effect, and an excellent elongation at break, breaking strength and a lower boiling water shrinkage, a high spinning yield and a high dyeing yield.
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公开(公告)号：US20220371982A1
公开(公告)日：2022-11-24
申请号：US17873927
申请日：2022-07-26
发明人： Bingbing QIN , Yufeng YANG , Xiucai LIU
IPC分类号： C07C51/43 , C07C55/21 , C12P7/6409 , C07C51/02 , C07C51/42 , C07C51/347 , C12P7/44 , B01D17/02
摘要： The present disclosure provides methods for isolating a long chain dicarboxylic acid such as a substantially pure or pure long chain dicarboxylic acid from a fermentation broth containing microbial cells.
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公开(公告)号：US20210340506A1
公开(公告)日：2021-11-04
申请号：US17373341
申请日：2021-07-12
发明人： Wenbo LIU , Min XU , Howard CHOU , Xiucai LIU
摘要： The invention is directed to a method of preparing a long chain dicarboxylic acid producing strain by using directed evolution and homologous recombination, a strain obtained by this method that is capable of producing a long chain dicarboxylic acid under an acidic condition and the use of the strain. In particular, the invention is directed to a method of preparing a long chain dicarboxylic acid producing strain by using directed evolution of CYP52A12 gene and homologous recombination, a strain obtained by this method that is capable of producing a long chain dicarboxylic acid under an acidic condition and the use of the strain.
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