Invert size for the internal and surface sizing of paper
First Claim
1. In an invert size for the engine and tub sizing of paper, comprising an aqueous dispersion of a fortified, hydrogenated or disproportionated and optionally esterified rosin or mixture of such rosins and of a dispersant that contains digested casein or an emulsifier of the formula
wherein R is an alkylphenyl, alkyl, or alkenyl group or a cycloalkyl group with condensed rings, A is a group of the formula --CH2 COO or --SO3, Mx+ is a cation, x is 1 or 2, and n is a number such that approximately 21 to 76% of the molecular weight of the anion is in the --OCH2 CH2 groups, the improvement which comprises including cationic starch in the dispersion as a dispersant, the dispersion by weight comprising about 5 to 50% of the rosin or mixture of rosins and 1 to 15% of the dispersant based on the rosin or mixture of rosins, with the remainder consisting essentially of water, the ratio of the weight of casein or emulsifier of Formula I to the weight of cationic starch in the dispersant ranging from about 20;
80 to 80;
20, the ratio of the weight of rosin;
cationic starch ranging from about 1;
0.0280 to 1;
0.0710.
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Accused Products
Abstract
An invert size for the engine and tub sizing of paper. It contains an aqueous dispersion of a fortified, unfortified, hydrogenated, or disproportionated and optionally esterified rosin or mixture of such rosins and of a dispersant that contains digested casein or an emulsifier of the general formula
[R--(OCH.sub.2 CH.sub.2).sub.n --O--A].sub.x.sup.- M.sup.X+(I)
wherein R is an alkylphenyl, alkyl, or alkenyl group or a cycloalkyl group with condensed rings, A is a group with the formula --CH2 COO or --SO3, Mx+ is a cation, x is 1 or 2, and n is a number such that approximately 21 to 76% of the molecular weight of the anion is in the --OCH2 CH2 group. To allow sizing control, the dispersant also contains cationic starch.
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Citations
11 Claims
- 1. In an invert size for the engine and tub sizing of paper, comprising an aqueous dispersion of a fortified, hydrogenated or disproportionated and optionally esterified rosin or mixture of such rosins and of a dispersant that contains digested casein or an emulsifier of the formula
- space="preserve" listing-type="equation">[R--(OCH.sub.2 CH.sub.2).sub.n --O--A].sup.-.sub.x M.sup.x+(I)
wherein R is an alkylphenyl, alkyl, or alkenyl group or a cycloalkyl group with condensed rings, A is a group of the formula --CH2 COO or --SO3, Mx+ is a cation, x is 1 or 2, and n is a number such that approximately 21 to 76% of the molecular weight of the anion is in the --OCH2 CH2 groups, the improvement which comprises including cationic starch in the dispersion as a dispersant, the dispersion by weight comprising about 5 to 50% of the rosin or mixture of rosins and 1 to 15% of the dispersant based on the rosin or mixture of rosins, with the remainder consisting essentially of water, the ratio of the weight of casein or emulsifier of Formula I to the weight of cationic starch in the dispersant ranging from about 20;
80 to 80;
20, the ratio of the weight of rosin;
cationic starch ranging from about 1;
0.0280 to 1;
0.0710.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification
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- Resources
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Current AssigneeKlebstofwerke Collodin Dr Schultz & Nauth GmbH
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Original AssigneeKlebstofwerke Collodin Dr Schultz & Nauth GmbH
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InventorsBeyer, Uwe, Schultz, Wolf-Stefan
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Primary Examiner(s)Chin, Peter
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Application NumberUS07/294,834Time in Patent Office729 DaysField of Search162/175, 162/180, 162/164.6, 162/166, 162/158, 162/174, 106/218, 106/236, 106/238US Class Current162/158CPC Class CodesD21H 17/14 Carboxylic acids; Derivativ...D21H 17/22 ProteinsD21H 17/62 Rosin; Derivatives thereof
