公开(公告)号：US20170283557A1

公开(公告)日：2017-10-05

申请号：US15503904

申请日：2015-08-31

申请人： INVISTA NORTH AMERICA S.A R.L.

发明人： Charles Richard LANGRICK

IPC分类号： C08G69/28

CPC分类号： C08G69/28 ,  C08G69/40 ,  C08G2650/50 ,  D01F6/80 ,  D01F6/82

摘要： The present invention relates to a process for making a hydrophilic polyamide without excessive foaming by delaying the introduction of the hydrophilic monomer. The hydrophilic monomer may be added to the polymerization process after at least a portion of the water has been removed from the process.

公开(公告)号：US20170081473A1

公开(公告)日：2017-03-23

申请号：US15310603

申请日：2015-05-14

申请人： INVISTA NORTH AMERICA S.A R.L.

发明人： Michael BENSTEAD ,  Charles Richard LANGRICK

IPC分类号： C08G69/26

摘要： The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid. The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid.

公开(公告)号：US20210130574A1

公开(公告)日：2021-05-06

申请号：US17047404

申请日：2019-04-17

申请人： INVISTA NORTH AMERICA S.A R.L. ,  INVISTA TEXTILES (U.K) LIMITED

发明人： Charles Richard LANGRICK ,  Deborah SARZOTTI

IPC分类号： C08K3/38 ,  C08K3/22 ,  C08K5/00 ,  C08K5/3492 ,  C08K5/5313 ,  C08K7/14 ,  C08G69/26 ,  C08J3/20 ,  C08J3/22 ,  C08J5/04 ,  C08K5/521 ,  C08L77/06 ,  D01F1/07 ,  D01F6/60

摘要： The present invention relates to flame-retardant polyamide compositions. In various aspects, the present invention provides a flame-retardant polyamide composition including a polyamide that is about 30 wt % to about 99 wt % of the composition. The polyamide has a relative viscosity (RV) of ≥20 to ≤33 as measured as an 8.4 wt % solution in 90% formic acid. The composition also includes one or more flame-retardant additives. Various aspects of the present invention provide compositions having enhanced flame-retardant properties as compared to corresponding compositions including the same or greater concentration of flame-retardant additive but using a polyamide that has an RV that is 33.