Patent number: 11447682
Abstract: This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R1 and R2 represent hydrogen, methyl or ethyl, A represents a linear or branched C1-C12-alkylene, and Q+ stands for NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ? Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R1 represents hydrogen, methyl, or ethyl, X+ stands for H+, NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ? Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.
Type:
Grant
Filed:
May 13, 2020
Date of Patent:
September 20, 2022
Assignee:
CLARIANT INTERNATIONAL LTD
Inventors:
Dirk Fischer, Christoph Kayser, Claudia Diemel, Jürgen Tonhauser, Michael Schäfer
Publication number: 20200270506
Abstract: This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R1 and R2 represent hydrogen, methyl or ethyl, A represents a linear or branched C1-C12-alkylene, and Q+stands for NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ? Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R1 represents hydrogen, methyl, or ethyl, X+stands for H+, NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ? Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.
Type:
Application
Filed:
May 13, 2020
Publication date:
August 27, 2020
Applicant:
Clariant International Ltd.
Inventors:
Dirk FISCHER, Christoph KAYSER, Claudia DIEMEL, Jürgen TONHAUSER, Michael SCHÄFER
Publication number: 20180171207
Abstract: This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R1 and R2 represent hydrogen, methyl or ethyl, A represents a linear or branched C1-C12-alkylene, and Q+ stands for H+, NH4+, Li+, Na+, K+, ½Ca++, ½Mg++, ½Zn++, ?Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R1 represents hydrogen, methyl, or ethyl, X+ stands for H+, NH4+, Li+, Na+, K+, ½Ca++, ½Mg++, ½Zn++, ?Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.
Type:
Application
Filed:
May 31, 2016
Publication date:
June 21, 2018
Applicant:
Clariant International Ltd.
Inventors:
Dirk FISCHER, Christoph KAYSER, Claudia DIEMEL, Jürgen TONHAUSER, Michael SCHÄFER
Publication number: 20180155478
Abstract: The invention relates to a method for producing water-soluble or water-swellable polymers, containing a) 5 to 98 mol. %, preferably between 20 and 80 mol. % of one or more recurrent structural units of formula (1), where R1, R2 and R3 represent hydrogen, methyl or ethyl, Y represents a chemical bond, O, CH2, C(CH3)H, C(O)NR2, A represents a chemical bond, O, arylene, phenylene, linear or branched C1-C12-alkylene, a linear mono-hydroxyalkylene group with 2 to 6 carbon atoms or a linear or branched di-hydroxyalkylene group with 3 to 6 carbon atoms, D stands for S(O), POH, POR3 or PO-Q+, Q+ stands for H+, Li+, Na+, K+, 1/2 Ca++, 1/2 Mg++, 1/2 Zn++, 1/3 Al+++, 1/4 Zr++++ or for mixtures of these ions, and b) 2 to 95 mol. %, preferably 20 to 80 mol.
Type:
Application
Filed:
May 31, 2016
Publication date:
June 7, 2018
Applicant:
Clariant International Ltd.
Inventors:
Christoph KAYSER, Dirk FISCHER, Claudia DIEMEL, Katharina BERZ