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公开(公告)号：US12037454B2
公开(公告)日：2024-07-16
申请号：US17440363
申请日：2020-03-12
发明人： Hideo Aso , Shuji Kubota , Yoshitaka Ayuzawa
摘要： The present invention is a polyamide resin composition containing 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B), and preferably further containing a coupling agent (C) and a fatty acid metal salt (D), in which an average particle size of secondary particles of the talc (B) in the polyamide resin composition is greater than 30 μm. The polyamide resin composition is less likely to cause a poor appearance of a molded article or occurrence of sink marks, and can stably provide characteristics within desired ranges.
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公开(公告)号：US12098278B2
公开(公告)日：2024-09-24
申请号：US17440345
申请日：2020-03-12
发明人： Hideo Aso , Shuji Kubota , Yoshitaka Ayuzawa
CPC分类号： C08L77/02 , C08K3/34 , C08K5/098 , C08K2201/005 , C08L2203/30
摘要： The present invention is a polyamide resin composition which contains 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B). The average particle size of secondary particles of the talc (B) in the polyamide resin composition is 30 μm or less. The polyamide resin composition has an exothermic peak present on a high temperature side of a maximum exothermic peak of a crystallization temperature during cooling in a cooling process of measurement by means of a differential scanning calorimeter. Variations in physical characteristics such as a molding shrinkage, mechanical characteristics, and a heat distortion temperature of the polyamide resin composition are suppressed among different production machines or different production lots. Consequently, characteristics within desired ranges are stably obtained.
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公开(公告)号：US12071512B2
公开(公告)日：2024-08-27
申请号：US17440363
申请日：2020-03-12
发明人： Hideo Aso , Shuji Kubota , Yoshitaka Ayuzawa
摘要： The present invention is a polyamide resin composition containing 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B), and preferably further containing a coupling agent (C) and a fatty acid metal salt (D), in which an average particle size of secondary particles of the talc (B) in the polyamide resin composition is greater than 30 μm. The polyamide resin composition is less likely to cause a poor appearance of a molded article or occurrence of sink marks, and can stably provide characteristics within desired ranges.
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