Modified guar gum thickener for papermaking paints and preparation method thereof

A technology of guar gum and thickener, applied in paper coating, papermaking, textiles and papermaking, etc., can solve the problems of poor resistance to dielectric microbial degradation, inability to rapidly swell and hydrate, and high content of water-insoluble matter, and achieve low cost, Solve the effect of flocculation and growth of microorganisms and reduce heat energy

Inactive Publication Date: 2016-05-25
QINGDAO XIANGZE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Guar gum can be dispersed in water to form a high-viscosity liquid, but natural guar gum has the following disadvantages: high content of water-insoluble matter; not fast swelling and hydration, slow dissolution rate; difficult to control viscosity; poor fluidity; insufficient transparency; resistance to dielectrics and microorganisms Poor degradability

Method used

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  • Modified guar gum thickener for papermaking paints and preparation method thereof
  • Modified guar gum thickener for papermaking paints and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Weigh 20g of deionized water, 10g of acrylic acid, 17g of butyl acrylate, 1g of fatty alcohol polyoxyethylene ether methacrylate, 3g of sodium lauryl sulfate, and 0.3g of DAP, mix evenly, heat slightly to dissolve, stir vigorously for 10 minutes and set aside. Weigh 0.4 g of potassium persulfate and dissolve it in 56 g of deionized water for later use.

[0026] Add 100g of deionized water, 20g of guar collagen powder, and 1g of potassium persulfate into a four-neck flask with a stirring and condensing device, start to heat up to 75°C, and after 3 hours of heat preservation, add 1g of acetic acid to the flask to adjust the pH value for 3-4.

[0027] Add the monomer mixture and potassium persulfate solution dropwise at the same time, and the dropwise addition is completed in 4 hours. After 3 hours of heat preservation, the temperature is lowered to below 30°C, and the milky white translucent liquid is discharged with a solid content of 26%. The viscosity is determined by ...

example 2

[0029] Weigh 20g deionized water, 6g methacrylic acid, 21g isooctyl methacrylate, 2g fatty alcohol polyoxyethylene ether methacrylate, 4g tristyrene polyoxyethylene methacrylate, 3g lauryl sulfate Sodium, 0.2g N,N-methylenebisacrylamide were mixed evenly, slightly heated to dissolve, stirred vigorously for 10min and set aside. Weigh 0.6 g of potassium persulfate and dissolve in 56 g of deionized water for later use.

[0030] Add 100g of deionized water, 20g of guar collagen powder, and 1g of potassium persulfate into a four-neck flask equipped with a stirring and condensing device, start to heat up to 65°C, and keep warm for 0.5h, then add 2g of acetic acid to the flask to adjust the pH The value is 3-4.

[0031] Add the monomer mixture and potassium persulfate solution dropwise at the same time, and the dropwise addition is completed in 3 hours. After 3 hours of heat preservation, the temperature is lowered to below 30°C, and the milky white translucent liquid is discharged,...

example 3

[0033] Weigh 20g deionized water, 13g acrylic acid, 14g ethyl methacrylate, 0.5g fatty alcohol polyoxyethylene ether methacrylate, 2g tristyrene polyoxyethylene methacrylate, 3g sodium lauryl sulfate, Mix 1g of OP-10 and 0.5g of N-methylolacrylamide evenly, heat slightly to dissolve, stir vigorously for 10min and set aside. Weigh 0.6 g of potassium persulfate and dissolve in 56 g of deionized water for later use.

[0034] Add 100g of deionized water, 30g of guar collagen powder, and 1g of potassium persulfate into a four-necked flask with a stirring and condensing device, start to heat up to 80°C, and after keeping the temperature for 0.5h, add 2.5g of acetic acid to the flask to adjust The pH value is 3-4.

[0035] Add the monomer mixture and potassium persulfate solution dropwise at the same time, and the dropwise addition is completed in 3 hours. After 3 hours of heat preservation, the temperature is lowered, and the discharge is milky white transparent liquid with a solid...

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Abstract

The invention belongs to the technical field of fine chemicals for papermaking, and particularly relates to a modified guar gum thickener for papermaking paints and a preparation method thereof. The thickener is prepared from the following raw materials in percentage by weight: 0.4-20% of guar gum, 2-20% of unsaturated acid, 5-40% of acrylate, 0.1-3% of functional monomer, 0.02-5% of emulsifier, 0.01-2% of crosslinking agent, 0.2-3% of initiator, 0.3-1% of pH buffering agent and the balance of water. The chemically modified guar gum has stabler structure, and overcomes the defect of high tendency to generate flocculation and microbes. The original dissolution by heating and stirring is changed into direct addition, thereby greatly lowering the heat energy, saving abundant time for preparing the papermaking paint, endowing the guar gum with favorable flowability, solving the problem of high splash tendency in the overcoating process of the papermaking paint, reducing the consumption of the adhesive, adhesion promoter and OBA (optical bleaching agent), and lowering the production cost.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals for papermaking, and in particular relates to a modified guar gum thickener for papermaking coatings and a preparation method thereof. Background technique [0002] The paper-making coating thickeners that appear on the market are all water-soluble natural polymer materials, which can make the coating have a certain viscosity and suspension force, but the steps are often cumbersome and time-consuming when adding, and they have no fluidity and poor transparency. , Splashing and flocculation are prone to occur during the construction process, and microorganisms that are harmful to paper quality are easy to breed. [0003] Guar gum is a highly purified natural polysaccharide extracted from guar beans. Due to its unique molecular structure and naturalness, it has quickly become a new environmentally friendly papermaking additive with superior performance. Guar gum can be dispersed in water to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/06C08F220/18C08F2/26C08F2/30D21H19/56
CPCD21H19/56C08F2/26C08F2/30C08F251/00C08F220/1808C08F220/1802C08F220/1804
Inventor 刘阳杜祥森
Owner QINGDAO XIANGZE CHEM CO LTD
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