Patents Assigned to Witco Vinyl Additives GmbH
  • Patent number: 6310128
    Abstract: A polyoxyalkylene compound and an inorganic salt are used to reduce the tendency of halogen-containing polymers to build up electrostatic charge and at the same time to achieve good stability.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: October 30, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Bruno Hilti, Ernst Minder, Jürgen Pfeiffer, Rolf Drewes
  • Patent number: 6274654
    Abstract: A description is given of compositions comprising a chlorine-containing polymer and at least one compound of the general formula I where Y is S or O, and R1 and R2 independently of one another are unsubstituted or C1-C4-alkyl-, C1-C4-alkoxy- and/or hydroxyl-substituted phenyl, phenyl-C1-C4-alkyl which is unsubstituted or substituted on the phenyl ring by C1-C4-alkyl, C1-C5-alkoxy and/or hydroxyl, or are C3-C6-alkenyl, C5-C8-cycloalkyl, or C2-C10-alkyl interrupted by at least 1 oxygen atom, or, if R1 and R2 are different from one another, one of the two radicals can be C2-C12-alkyl and the other can be C2-C12-alkyl or one of the above radicals, or, if R1 and R2 are identical, both can also be C5-C12-alkyl, and, if Y is sulfur, R1 and R2 cannot be octyl.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: August 14, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Markus Kolb
  • Patent number: 6232375
    Abstract: The invention relates to 4-aminopyrimidinediones and oxazolidino-4-aminopyrimidinediones of the formula I and II given below, a process for their preparation, their use for stabilizing halogen-containing polymers, and compositions composed of compounds of the formula I or II and of chlorine-containing polymers, in particular PVC.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: May 15, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • Patent number: 6211270
    Abstract: A description is given of compositions comprising a chlorine-containing polymer and at least one compound of the general formula I where x is oxygen or sulfur, and R is C2-C22-acyloxyalkyl or C1-C12-alkyl which may be interrupted by 1 to 3 oxygen atoms and/or substituted by 1 to 3 OH groups, or is C3-C8-alkenyl, C7-C10-phenylalkyl, C5-C8-cycloalkyl, C7-C10-alkylphenyl, phenyl or naphthyl, where the aromatic radical in each case may be substituted by —OH, C1-C12-alkyl and/or OC1-C4-alkyl, and R1 is hydrogen or is as defined for R.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: April 3, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Hans-Helmut Friedrich, Wolfgang Wehner
  • Patent number: 6194494
    Abstract: A stabiliser combination, mainly for PVC, is described, comprising A) at least one compound of formula I  wherein R*1 and R*2 are each independently of the other C1-C12alkyl, C3-C6lkenyl, C5-C8cycloalkyl that is unsubstituted or substituted by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or by chlorine atoms, or C7-C9phenylalkyl that is unsubstituted or substituted at the phenyl ring by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or chlorine atoms, and R*1 and R*2 may additionally be hydrogen and C1-C12alkyl, and Y is S or O, and B) at least one compound from the following groups: B1) perchlorate compounds, B2) glycidyl compounds, B3) beta-diketones and beta-keto esters, B4) dihydropyridines and polydihydropyridines, B5) polyols and disaccharide alcohols, B6) sterically hindered amines (tetraalkylpiperidine compounds), B7) alkali aluminosilicates (zeolites), B8) hydrotalcites, B9) alkali aluminocarbonates (dawsonite
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: February 27, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Kornelia Malzacher, Hans-Ludwig Mehner, Rolf Drewes
  • Patent number: 6174941
    Abstract: A description is given of compounds of the general formula I where Y is oxygen or sulfur, and R1 and R2 independently of one another are C1-C18-alkyl, C3-C6-alkenyl, unsubstituted or C1-C4-alkoxy-, C5-C8-cycloalkyl-, —OH— and/or Cl-substituted C1-C18-alkyl, C5-C8-cycloalkyl, phenyl or C7-C9-phenylalkyl which is unsubstituted or substituted on the phenyl ring by C1-C4-alkyl, C1-C4-alkoxy, C5-C8-cycloalkyl, —OH and/or Cl, and R3 is unsubstituted C9-C18-alkyl or is C1-C18-alkyl substituted by —OH, C1-C12-alkoxy, phenoxy, C6-C8-alkylphenoxy, C7-C9-alkoxyphenyl, —C═O(OR4) and/or —O—COR4, or is C3-C6-alkenyl, C5-C8-cycloalkyl, or mono- to tri-OH—, —C1-C4-alkyl-, —C1-C4-alkoxy-, —C═O(OR4)— and/or —O—COR4-substituted phenyl or naphthyl, and where R4 is C1-C12-alkyl, which are suitable for stabilizing chlorine-containing polymers, especially PVC.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: January 16, 2001
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Rolf Drewes
  • Patent number: 6156830
    Abstract: A description is given of compounds of the general formula I ##STR1## n is 1 or 2, Y is oxygen or sulfur andR.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined in claim 1which are suitable for stabilizing chlorine-containing polymers, especially PVC.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: December 5, 2000
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • Patent number: 6136900
    Abstract: The invention relates to a PVC composition comprising a stabilizer combination of (b) polyDHP of the formula I ##STR1## where the radicals T, L, R, R', R" are as defined in claim 1, (c) a subtance from the group consisting of crystalline hydrotalcites,crystalline or amorphous zeolites,crystalline or amorphous dawsonites, magadiites or kenyaites, disaccharide alcohols and sterically hindered amines containing the structural unit ##STR2## in which R.sup.0 is hydrogen or methyl, and (d) at least one zinc, aluminium or lanthanoid compound.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: October 24, 2000
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Karl Josef Kuhn, Wolfgang Wehner
  • Patent number: 6084013
    Abstract: A description is given of stabilizer combinations comprisingA) at least one compound of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.5 -C.sub.8 -cycloalkyl which is unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 -alkyl-, C.sub.1 -C.sub.4 -alkoxy-, C.sub.5 -C.sub.8 -cycloalkyl or hydroxyl groups or chlorine atoms, or are C.sub.7 -C.sub.9 -phenylalkyl which is unsubstituted or substituted on the phenyl ring by 1 to 3 C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.5 -C.sub.8 -cycloalkyl or hydroxyl groups or chlorine atoms, andR.sub.1 and R.sub.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: July 4, 2000
    Assignee: Witco Vinyl Additives GmbH
    Inventor: Wolfgang Wehner
  • Patent number: 6013703
    Abstract: A stabilizer combination, principally for PVC, is described which essentially comprisesA) at least one zinc compound of the formula IZn(R.sup.1 R.sup.2) (I)andB) at least one metal compound of the formula IIMe.sup.n+ (R.sup.3.sub.a R.sup.4.sub.b R.sup.5.sub.c) (II)in which Me is Al, Mg, Na or K,a, b and c are 0, 1, 2 or 3,n=a+b+c and can be from 1 to 3, and at least one radical R.sup.1 to R.sup.5 independently of one another are C.sub.1 -C.sub.22 carboxylates, C.sub.2 -C.sub.21 alkenyl-CO.sub.2 --, phenyl-CO.sub.2 --, naphthyl-CO.sub.2 --, C.sub.5 -C.sub.12 cycloalkyl-CO.sub.2 --, C.sub.7 -C.sub.18 alkylphenyl-CO.sub.2 --, C.sub.7 -C.sub.18 alkylphenyl-O--, C.sub.7 -C.sub.9 phenylalkyl-CO.sub.2 --, C.sub.1 -C.sub.21 -alkyl-O--, R.sup.8 --O--CO--[CH.sub.2 ].sub.p --S-- or a radical of the formula R.sup.6 --CO--CH.dbd.CR.sup.7 --O.sup..crclbar.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: January 11, 2000
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Karl Josef Kuhn, Wolfgang Wehner, Horst Zinke
  • Patent number: 6002004
    Abstract: The invention relates to compositions comprisinga) a chlorine-containing polymer andb) at least one compound containing at least one radical of the formula I ##STR1## in which A is the additional groups or atoms necessary to form an unsubstituted or substituted six-membered heterocyclic ring containing two nitrogen ring atoms.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: December 14, 1999
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Rolf Drewes
  • Patent number: 5985964
    Abstract: High stabilization of PVC containing recycled material is achieved by using at least one lubricant and a stabilizer containing no lead or cadmium compounds.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: November 16, 1999
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Heinz Herbst, Kurt Hoffmann, Rudolf Pfaendner, Rolf Drewes
  • Patent number: 5969015
    Abstract: Compositions, comprising (i) a halogen-containing polymeric material, and(ii) at least one phosphite of formula I ##STR1## wherein n is a number from 1 to 6,R is a divalent linking group of formulae as defined herein as well as of novel compounds of formula I and their use as stabilisers.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: October 19, 1999
    Assignee: Witco Vinyl Additives GmbH
    Inventors: Horst Zinke, Karl Josef Kuhn, Wolfgang Wehner