Pigmented size press and surface size for coated paper and paperboard

Patent metadata

Field	Value
Publication number	US-2019177920-A1
Application number	US-201715837577-A
Country	US
Kind code	A1
Filing date	Dec 11, 2017
Priority date	Dec 11, 2017
Publication date	Jun 13, 2019
Grant date	—

Abstract

A size press composition for paper or paperboard is provided, which includes:
binder; pigment; synthetic surface sizing agent; and water; wherein the binder and pigment are present in a binder:pigment weight ratio of about 10:1 to about 1:10; and wherein the synthetic surface sizing is present in a synthetic surface sizing agent:(binder and pigment) weight ratio of about 2:100 to about 10:100.

First claim

1 . A size press composition for paper or paperboard, comprising:
binder; pigment; synthetic surface sizing agent; and water; wherein the binder and pigment are present in a binder:pigment weight ratio of about 10:1 to about 1:10; and wherein the synthetic surface sizing is present in a synthetic surface sizing agent:(binder and pigment) weight ratio of about 2:100 to about 10:100.

2 . The size press composition of claim 1 , wherein the binder comprises one or more of natural product, casein, soy protein, fatty acid salts and copolymers, water soluble polymer, water soluble starch co-binder, polyvinyl alcohol, poly acrylic acid, poly acrylic acid salt, polyvinylpyrrolidone, polyethylene glycol, polyethylene oxide, polymer emulsion, acrylate, styrene acrylate, styrene butadiene, styrene acrylonitrile, polyurethane, polyvinyl acetate, polyethylene emulsion, polyethylene (PE) polymers; polyethylene terephthalate (PET) polymers; polyhydroxyalkanoate (PHA) polymers; polylactic acid (PLA) polymers; polyglycolic acid (PGA) polymers; polyvinyl acetate polymers; waxes; polyurethane polymers; or epoxy resins, starch, high-amylose corn starch, waxy corn starch, tapioca starch, cationic starch, ethylated starch, oxidized starch, corn starch, potato starch, rice starch, dent corn starch, waxy starch, modified starch, FilmKote™ by Ingredion, FilmKote 370™ by Ingredion (modified starch), Aquabloc™ by Aquasol, Aquabloc 403™ by Aquasol (starch), Flex Starch™ by Tate and Lyle, Clear-Cote 640™ by Tate and Lyle (waxy starch), PG270™ by Ingredion (ethylated starch), RAP 810™ by Trinseo (styrene acrylate), XU 31669 SB™ latex by Trinseo (styrene butadiene), XU 31695™ by Trinseo (styrene acrylonitrile), Polyco 3960™ by Dow (poly vinyl acetate), Polyco 2160 IPA™ by Dow (poly vinyl acetate), binder, Hypod 1001™ by Dow (polyethylene emulsion), Hypod 9105™ by Dow (polyethylene emulsion), or a combination thereof.

3 . The size press composition of claim 1 , wherein the binder comprises one or more natural products such as casein, soy protein, and fatty acid salts and copolymers, water soluble polymers such as polyvinyl alcohol, poly acrylic acid and salts, polyvinylpyrrolidone, polyethylene glycol, polyethylene oxide, etc, and polymer emulsions such as acrylates, styrene acrylates, styrene butadienes, polyurethanes, polyvinyl acetates, polyethylene (PE) polymers; polyethylene terephthalate (PET) polymers; polyhydroxyalkanoate (PHA) polymers; polylactic acid (PLA) polymers; polyglycolic acid (PGA) polymers; polyvinyl acetate polymers; waxes; polyurethane polymers; or epoxy resins, and their copolymers and derivatives.

4 . The size press composition of claim 1 , wherein the binder comprises a starch selected from the group consisting of high-amylose corn starch, waxy corn starch, tapioca starch, cationic starch, ethylated starch, oxidized starch, corn starch, potato starch, rice starch, dent corn starch, waxy starch, modified starch, FilmKote™ by Ingredion, FilmKote 370™ by Ingredion (modified starch), Aquabloc™ by Aquasol, Aquabloc 403™ by Aquasol (starch), Flex Starch™ by Tate and Lyle, Clear-Cote 640™ by Tate and Lyle (waxy starch), PG270™ by Ingredion (ethylated starch), and a combination thereof.

5 . The size press composition of claim 1 , wherein the binder comprises a water-soluble polymer binder selected from the group consisting of starch binders, cellulosic binders, polyvinyl alcohol binders, polyacrylic acid binders, polymethacrylic acid binders, polyvinylamine binders, polyacrylamide binders, polyether binders, sulfonated polystyrene binders, carboxylated polystyrene binders, and a combination thereof.

6 . The size press composition of claim 5 , wherein the water-soluble polymer binder is a starch binder.

7 . The size press composition of claim 1 , wherein the binder comprises a polymer latex binder selected from the group consisting of styrene butadiene rubber latexes, acrylic polymer latexes, polyvinyl acetate latexes, styrene acrylic copolymer latexes, polyurethane latexes, starch/acrylic copolymer latexes, starch/styrene acrylic copolymer latexes, polyvinyl alcohol (PVOH)/styrene acrylic copolymer latexes, PVOH/acrylic copolymer latexes, and a combination thereof.

8 . The size press composition of claim 7 , wherein the polymer latex binder is a styrene-acrylic latex binder.

9 . The size press composition of claim 1 , wherein the binder is ethylated starch.

10 . The size press composition of claim 1 , wherein the pigment is selected from the group consisting of ground calcium carbonate (GCC), precipitated calcium carbonate (PCC), clay, kaolin clay, talc, mica, calcium sulfate, absorbent plastic pigment particles, calcined clay pigment particles, titanium dioxide pigment particles, barium sulfate pigment particles, silica pigment particles, zeolite pigment particles, fumed silica pigment particles, alumina pigment particles, bentonite clay pigment particles, HC (Hydrocarb) 90™ by Omya (ground calcium carbonate), HC (Hydrocarb) 60™ by Omya (ground calcium carbonate), Hydrafine 90W™ by KaMin (clay), and a mixture thereof.

11 . The size press composition of claim 1 , wherein the pigment is ground calcium carbonate (GCC).

12 . The size press composition of claim 1 , wherein the synthetic surface sizing agent is selected from the group consisting of styrene maleic anhydride (SMA), alkyl ketene dimer (AKD), AKD (IP Size 2000)™ by Solenis (alkyl ketene dimer), Scripset 745™ by Solenis (styrene maleic anhydride), styrene acrylic emulsion (SAE), polymer emulsions with a surface energy of 50 dynes or less after drying, and a combination thereof.

13 . The size press composition of claim 1 , wherein the synthetic surface sizing agent is styrene maleic anhydride (SMA).

14 . The size press composition of claim 1 , wherein the synthetic surface sizing agent is Scripset™.

15 . The size press composition of claim 1 , further comprising one or more water soluble salt.

16 . The size press composition of claim 15 , wherein the water soluble salt is one or more of a multivalent cationic metal salt, an inorganic salt, an organic salt, or a combination thereof.

17 . The size press composition of claim 15 , wherein the water soluble salt is one or more multivalent cationic metal salt, inorganic salt, organic salt, or combination thereof selected from the group consisting of calcium chloride, calcium acetate, calcium magnesium acetate, calcium nitrate, calcium hydroxide, magnesium chloride, magnesium sulfate, magnesium nitrate, magnesium sulfate, aluminum chloride, aluminum nitrate, aluminum chlorohydrate, aluminum sulfate, sodium aluminum sulfate, vanadium chloride, and a combination thereof.

18 . The size press composition of claim 15 , wherein the water soluble salt is calcium chloride.

19 . The size press composition of claim 15 , wherein the water soluble salt is a metal drying salt, multivalent metal drying salt, monovalent metal drying salt, or a combination thereof.

20 . The size press composition of claim 19 , wherein the multivalent metal drying salt is selected from the group consisting of calcium chloride, calcium acetate, calcium hydroxide, calcium nitrate, calcium sulfate, calcium sulfite, magnesium chloride, magnesium acetate, magnesium nitrate, magnesium sulfate, magnesium sulfite, aluminum chloride, aluminum nitrate, aluminum sulfate, aluminum chlorohydrate, sodium aluminum sulfate, vanadium chloride, and a combination thereof.

21 . The size press composition of claim 19 , wherein the monovalent metal drying

Assignees

• Graphic Packaging Int Llc

Inventors

• Koenig Michael Francis

Classifications

• D21H23/56

  Rolls (D21H23/38 takes precedence) · CPC title

• D21H19/38

  characterised by the pigments · CPC title

• D21H19/82

  superposed {(D21H19/84 takes precedence)} · CPC title

• D21H17/28

  Starch · CPC title

• D21H17/37

  Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates · CPC title