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公开(公告)号：US20160075828A1
公开(公告)日：2016-03-17
申请号：US14888243
申请日：2014-04-30
Applicant: BASF SE
Inventor： Rüdiger HÄFFNER , Rolf-Egbert GRÜTZNER , Achim STAMMER , Angela ULZHÖFER
CPC classification number: C08G69/46 , C08G69/06 , C08G69/30 , C08J5/18 , C08J2377/02
Abstract: The invention relates to a method for synthesizing a polyamide, in which method an aqueous solution is sprayed onto the polyamide before and/or during a solid-state postcondensation process. The aqueous solution comprises at least a first compound, selected from the group comprising phosphoric acid, fully neutralized salts of phosphoric acid, partially neutralized salts of phosphoric acid, and mixtures thereof, and a second compound, selected from the group comprising an acid, an anhydride, a lactone, ammonia, an amine, and mixtures thereof, with the stipulation that the second compound is not phosphoric acid and is not phosphoric acid anhydride. The spraying occurs at a temperature that lies below the boiling point of water. A polyamide that can be produced by means of the method according to the invention can be used in particular to produce films, monofilaments, fibers, threads, or textile sheet materials.
Abstract translation: 本发明涉及一种聚酰胺的合成方法，其中在固态缩聚工艺之前和/或期间将水溶液喷涂到聚酰胺上。 所述水溶液至少包含选自磷酸，磷酸的完全中和盐，磷酸的部分中和盐及其混合物的第一种化合物，以及选自酸，第 酸酐，内酯，氨，胺及其混合物，第二化合物不是磷酸而不是磷酸酐。 喷雾发生在低于水沸点的温度下。 可以通过根据本发明的方法生产的聚酰胺可以特别用于生产薄膜，单丝，纤维，线或纺织片材。
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公开(公告)号：US20210206919A1
公开(公告)日：2021-07-08
申请号：US15999520
申请日：2017-02-16
Applicant: BASF SE
Inventor： Angela ULZHÖFER , Simon GRAMLICH , Rainer OSTERMANN , Achim STAMMER , Dirk SIMON , Ning ZHU
Abstract: Process for producing polyamide powders by precipitation The present invention relates to a process for producing polyamide powders and to the polyamide powders obtainable by this process. The present invention additionally relates to the use of the polyamide powder as sintering powder in selective laser sintering.
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