Vinyl ester/ethylene-based binders for paper and paperboard coatings

A vinyl ester and latex adhesive technology, applied in paper coating, papermaking, coating, etc., can solve problems such as opposition to commercial use and lack of

Inactive Publication Date: 2013-03-27
CELANESE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other issues including possible lack of FDA compliance and / or relatively high volatile organic compound (VOC) content also oppose commercial use of VAE-based coating compositions

Method used

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  • Vinyl ester/ethylene-based binders for paper and paperboard coatings
  • Vinyl ester/ethylene-based binders for paper and paperboard coatings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Aqueous adhesive latex emulsions were prepared by the following method:

[0059] In 3190 g of deionized water, dissolve 115 g of 20% sodium dodecylbenzene sulfonate active solution, 234 g of 65% fatty alcohol ethoxylate (30EO) active solution, 173 g of 30% sodium vinyl sulfonate and 13 g of sodium acetate. An iron salt is added as a redox catalyst.

[0060] After adding 216 g of vinyl acetate and pressurizing with 518 g of ethylene, the mixture was heated to 65°C and at this temperature 455 g of 4% FF6 (sulfinic acid derived reducing agent) solution and 320 g of 3.2% tert-butyl hydroperoxide (TBHP) solution were used for polymerization. Simultaneously, a monomer mixture comprising 4140 g of vinyl acetate, 6 g of diallyl phthalate and 9 g of maleic anhydride was added.

[0061] After the start of the polymerization, a further 312 g of ethylene were added, keeping the pressure below 80 bar. The monomer mixture was fed over a period of 4 hours while the initiator was r...

Embodiment 2-9

[0064] Using the same general procedure of Example 1, another eight adhesive latex emulsions were prepared, but with varying amounts of ethylene, maleic anhydride, and diallyl phthalate were used in their preparation. In some of these additional emulsions for comparison, only maleic anhydride comonomer or only diallyl phthalate crosslinker was used. In the rest of these comparative emulsions, neither maleic anhydride nor diallyl phthalate was incorporated into the formed VAE interpolymer. A description of the comonomer content of the interpolymers for each of the emulsions of Examples 2-9 is also presented in Table I below.

Embodiment 10

[0066] Aqueous adhesive latex emulsions were prepared by the following method involving the use of pre-emulsions:

[0067] In 2500 g of deionized water, dissolve 62 g of 20% sodium dodecylbenzene sulfonate active solution, 158 g of 65% fatty alcohol ethoxylate (30EO) active solution, 93 g of 30% sodium vinyl sulfonate and 13 g of sodium acetate. Iron salts are added as redox catalysts.

[0068] After adding 750 g of vinyl acetate and pressurizing with 500 g of ethylene, the mixture was heated to 65°C and at this temperature 343 g of 5% FF6 solution and 345g6% ammonium persulfate solution were polymerized.

[0069] A monomer pre-emulsion was also added to the mixture at the same time. Such a pre-emulsion was prepared by making 3250 g vinyl acetate in 6 g diallyl phthalate solution, 9 g maleic anhydride, 154 g 20% ​​sodium dodecylbenzenesulfonate active solution, 67 g 65% Fatty alcohol ethoxylate (30EO) active solution, and 73g of 30% sodium vinyl sulfonate emulsification co...

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Abstract

Disclosed are surfactant-stabilized latex emulsions which can be used as binders in paper coating compositions. Such latex emulsions comprise an interpolymer formed by emulsion polymerizing monomers selected from vinyl esters, e.g., vineyl acetate; ethylene; certain unsaturated mono- and di-carboxylic acid materials such as acrylic acid or maleic anhydride; and certain polyethylenically unsaturated cross-linking co-monomers such as diallyl phthalate. These latex emulsions are stabilized with surfactants which are substantially free of environmentally suspect alkyl phenol ethoxylates (APEs). The paper coating compositions containing latex emulsion binders of this type exhibit especially desirable coating strength as quantified by the Dry Pick Values (as defined herein) which such compositions provide.

Description

technical field [0001] The present invention relates to surfactant stabilized aqueous vinyl ester / vinyl emulsion interpolymers which exhibit enhanced dry pick strength when used in paper coating formulations. Background technique [0002] Pigmented paper coating formulations generally comprise synthetic aqueous polymeric binder emulsions and pigments and may contain other additives typically used in the technical field of paper coatings. Exemplary polymeric binders in emulsions are vinyl acetate copolymers and interpolymers, including vinyl acetate / ethylene and vinyl acetate / alkyl acrylate copolymers and interpolymers, and styrene / butadiene Acrylic Styrene / Acrylic Copolymer. Such copolymers and interpolymers may also contain other comonomers such as, for example, copolymerized ethylenically unsaturated mono- or dicarboxylic acids or other unsaturated comonomers that may function as crosslinkers. [0003] For example, US Patent No. 4,395,499 discloses high strength pigment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/04C08F218/08C08L31/02C08L31/04D21H19/28D21H19/56D21H19/58D21H19/60
CPCD21H19/28C09D131/04D21H19/56C08F218/04D21H19/58D21H19/60C08F218/08C08L31/04C08L31/02Y10T428/31906C08F212/02C08F228/02C08F222/04C08F218/18C08J3/03
Inventor P·康法罗纳R·法瓦哈K·戈尔
Owner CELANESE INT CORP
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