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1. 发明申请

US20190337224A1 METHOD FOR PRODUCING AN OBJECT FROM A PRECURSOR, AND USE OF A RADICALLY CROSSLINKABLE RESIN IN AN ADDITIVE PRODUCTION METHOD 审中-公开
公开(公告)号：US20190337224A1
公开(公告)日：2019-11-07
申请号：US16349470
申请日：2017-11-14
申请人： Covestro Deutschland AG
发明人： Dirk Achten , Thomas BÜSGEN , Jörg TILLACK , Michael LUDEWIG , Christoph TOMCZYK , Roland WAGNER
IPC分类号： B29C64/129 , B29C64/209 , C08G18/79 , C08G18/02 , C08G18/10 , C08G18/24 , C08G18/22 , C08G18/62 , C08G18/67
摘要： A process for producing an object from a precursor comprises the steps of: I) depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; II) depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply; III) repeating step II) until the precursor is formed; wherein the depositing of a free-radically crosslinked resin at least in step II) is effected by exposure and/or irradiation of a selected region of a free-radically crosslinkable resin corresponding to the respectively selected cross section of the object and wherein the free-radically crosslinkable resin has a viscosity (23° C., DIN EN ISO 2884-1) of ≥5 mPas to ≤100000 mPas. In the process the free-radically crosslinkable resin comprises a curable component in which NCO groups and olefinic C═C double bonds are present, wherein in the curable component the molar ratio of NCO groups to olefinic C═C double bonds is in a range from ≥1:5 to ≤5:1. In the process, after step III) step IV) is further performed: IV) treating the precursor obtained after step III) under conditions sufficient to at least partially trimerize to isocyanurate groups NCO groups present in the free-radically crosslinked resin of the obtained precursor to obtain the object. The invention further relates to the use of a free-radically crosslinkable resin having a viscosity (23° C., DIN EN ISO 2884-1) of ≥5 mPas to ≤100000 mPas in an additive manufacturing process, wherein the resin comprises a curable compound having isocyanurate groups, NCO groups and olefinic C═C double bonds. The invention finally relates to a polymer obtainable by crosslinking such a resin.

2. 发明申请

US20200071449A1 PROCESS FOR PRODUCING (CYCLO)ALIPHATIC POLYCARBONATE POLYOLS HAVING LOW REACTIVITY 审中-公开
公开(公告)号：US20200071449A1
公开(公告)日：2020-03-05
申请号：US16468507
申请日：2017-12-18
申请人： COVESTRO DEUTSCHLAND AG
发明人： Michael LUDEWIG , Stefan SOMMER , Holger BREUER , Michael Grahl
IPC分类号： C08G18/44 , C08G64/30 , C08G64/02 , C08G18/76
摘要： The present invention relates to a process for producing (cyclo)aliphatic polycarbonate polyols comprising the steps of a) reaction of at least one (cyclo)aliphatic polyol and at least one alkyl carbonate in the presence of at least one basic catalyst and b) neutralization by addition of at least one organic sulfonic acid having a molecular weight of 250 to 1000 g/mol and at least one branched or unbranched alkyl substitution having at least four carbon atoms, wherein step b) is performed after step a).

3. 发明申请

US20180273797A1 COATED FILMS WITH PARTICULARLY HIGH RESISTANCE TO HYDROLYSIS, AND MOLDINGS MADE OF SAME 审中-公开
公开(公告)号：US20180273797A1
公开(公告)日：2018-09-27
申请号：US15760422
申请日：2016-09-13
申请人： Covestro Deutschland AG
发明人： Michael LUDEWIG , Joachim PETZOLDT
IPC分类号： C09D175/16 , C08J7/04 , C08G18/67 , C08G18/44 , C08G18/76 , C09D7/61 , B41M1/30 , B05D1/40 , B05D3/02 , B29C51/14 , B29C51/42 , B29C35/08
CPC分类号： C09D175/16 , B05D1/40 , B05D3/0272 , B29C35/0805 , B29C51/14 , B29C51/42 , B29K2701/12 , B41M1/30 , C08G18/0823 , C08G18/227 , C08G18/246 , C08G18/348 , C08G18/44 , C08G18/6659 , C08G18/673 , C08G18/758 , C08G18/7671 , C08J7/047 , C08J2300/00 , C08J2475/16 , C08K3/36 , C08K2201/011 , C09D7/61 , C08G18/12 , C08G18/3228
摘要： The present invention concerns coated films, comprising a plastic film and a radiation-curable aqueous coating material, wherein the coating material comprises a polyurethane (meth)acrylate with particularly high hydrolysis resistance. Furthermore, it concerns a method for producing such films, the use of such films for producing mouldings, a method for producing mouldings with a radiation-cured coating and mouldings that can be produced by this method and the aqueous radiation-curable binding and coating material, which are contained in the coating.

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