Starch derivative biological latex and preparation method and application thereof

A technology of starch derivatives and bio-latex, applied in the field of bio-latex, can solve the problems of high-concentration starch paste with high viscosity, low bonding strength, and poor fluidity, and achieve easy operation, high solid content, suitable particle size and viscosity Effect

Active Publication Date: 2015-04-29
EVERFIRST WISEFUND TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Starch derivatives have a long history of being used in papermaking and pulping, but when used as adhesive latex for coated paper, there are problems such as low bonding strength, strong hydrophilicity, high viscosity of high-concentration starch paste, poor fluidity, and easy gelation, etc. defect

Method used

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  • Starch derivative biological latex and preparation method and application thereof
  • Starch derivative biological latex and preparation method and application thereof
  • Starch derivative biological latex and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Formula: (unit g)

[0025]

[0026]

[0027] Preparation Process:

[0028] Add soluble starch and 80% by weight of distilled water to a four-neck flask, heat to 90°C for gelatinization for 30 minutes under nitrogen protection and stirring; cool down to 60°C, add sodium bicarbonate to adjust pH = 7-9; Potassium and sodium dodecylsulfonate are dissolved with 10% by weight of distilled water respectively; ) into the four-neck flask; mix the monomers (ie methyl methacrylate, isooctyl acrylate and ethyl acetate) and the remaining 70% by weight of the initiator solution and divide them into 6 parts evenly, drop every 10 minutes Add once, slowly drop into the reaction kettle, the dropping speed is controlled at about 1 hour; the temperature is controlled at 70°C for grafting reaction for 4 hours, the temperature is lowered to 40°C, and the pH is adjusted to 7-8 to obtain the primary emulsion.

[0029] Heating the primary emulsion prepared above to 55°C, adding sodium t...

Embodiment 2

[0031] Formula: (unit g)

[0032]

[0033] Preparation Process:

[0034] Add soluble starch and 80% by weight of distilled water in a four-neck flask, heat to 85°C for gelatinization for 30 minutes under nitrogen protection and stirring; cool to 70°C, add sodium bicarbonate to adjust pH=7-9; Ammonium sulfate and sodium dodecylsulfonate are dissolved in distilled water with 10% by weight respectively; Add the solution into the four-necked bottle; mix the monomers (ie, methacrylic acid, isooctyl acrylate and methylstyrene) and the remaining 65% by weight of ammonium persulfate solution and divide them into 12 parts, dripping every 10 minutes Add once, slowly drop into the reaction kettle, the dropping speed is controlled at about 2 hours; the temperature is controlled at 70°C for grafting reaction for 4 hours, the temperature is lowered to 45°C, and the pH is adjusted to 7-8 to obtain the primary emulsion.

[0035] Heating the primary emulsion prepared above to 60° C., addi...

Embodiment 3

[0037] Formula: (unit g)

[0038]

[0039] Preparation Process:

[0040] Add maltodextrin and 80% by weight of distilled water to a four-neck flask, heat to 85°C for gelatinization for 30 minutes under nitrogen protection and stirring; cool to 60°C, add sodium bicarbonate to adjust pH=7-9; Ammonium sulfate and OP-10 are dissolved in distilled water with 10% weight respectively; The emulsifier (being OP-10) solution that will configure and the initiator (being ammonium persulfate) solution of 25% weight are added in the four-necked bottle; Monomers (i.e. methacrylic acid, isooctyl acrylate and methyl methacrylate) and the remaining 75% ammonium persulfate solution were mixed and divided into 12 parts on average, added dropwise every 15 minutes, slowly added to In the reaction kettle, the dropping rate is controlled at about 3 hours; the temperature is controlled at 75°C for grafting reaction for 2 hours, the temperature is lowered to 40°C, and the pH is adjusted to 7-8 to o...

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Abstract

The invention relates to starch derivative biological latex and a preparation method and application thereof. The starch derivative biological latex comprises the following components in parts by weight: 100 parts of starch derivatives, 50-200 parts of water, 50-150 parts of grafting monomers, 0.1-4 parts of initiators, 0.5-5 parts of emulsifying agent, 0.1-5 part of pH (potential of hydrogen) regulating agent, 0.5-10 parts of cross-linking agent and 0.1-5 parts of film coalescing aid. By using the starch derivatives as grating fundamental chains and by using crylic acid and esters thereof, acetic acid and esters thereof and vinyl benzene and derivatives thereof as the grating monomers, primary emulsion of the biological latex is prepared through high-molecular grafted copolymer emulsion polymerization; and through subsequent cross-linking and modification, the biological latex which has the advantages of low cost, excellent performance and environmental friendliness is finally synthesized. The starch derivative biological latex has the advantages of good hydrophobic property, high coalesced film strength, narrow molecular weight distribution, low viscosity and the like, can be used for partially or fully replacing petroleum base styrene-butadiene latex or styrene-acrylic latex which is commonly used at present in the paper coating field.

Description

technical field [0001] The invention relates to a biological latex, in particular to a starch derivative biological latex used for coating paper in the papermaking field, which can replace traditional petroleum-based latex, and a preparation method and application thereof. Background technique [0002] As people's requirements for paper quality are increasing day by day, more and more paper-making enterprises choose to use coating to improve paper quality. Coated paper is coated with a layer of paint on the base paper, so that the paper has good optical properties and printing performance etc. Coatings are mainly composed of pigments, adhesives and additives. Adhesives mainly refer to petroleum-based or starch-based latex commonly used in paper-making coatings, which play a decisive role in the quality of paper. [0003] At present, the most widely used latex in papermaking enterprises is petroleum-based styrene-butadiene latex or styrene-acrylic latex. However, with the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08L51/02D21H19/54
Inventor 雷得定杜海孙睢州
Owner EVERFIRST WISEFUND TECH BEIJING
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