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Hydrophobic decorative base paper and preparation method thereof

A decorative base paper and hydrophobic technology, which is applied in the field of decorative paper, can solve the problems of decorative base paper being prone to moisture and mildew, difficulties in the treatment of papermaking white water, and reduced paper absorption capacity, so as to improve dry and wet tensile strength, antibacterial and mildew resistance, and water solubility. sex-enhancing effect

Active Publication Date: 2022-02-08
ZHEJIANG GRANDRICH PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the decorative base paper has made great research progress, but it still has certain defects. For example, the decorative base paper needs to have good covering ability. A low filling amount cannot meet the covering ability, while a high filling amount will reduce the absorption capacity and strength of the paper; the decorative base paper is prone to moisture and mildew during use, which affects the appearance; in addition, during the manufacturing process of the decorative base paper, fillers A large amount of addition will also lead to problems such as difficulties in the treatment of white water in papermaking

Method used

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  • Hydrophobic decorative base paper and preparation method thereof
  • Hydrophobic decorative base paper and preparation method thereof
  • Hydrophobic decorative base paper and preparation method thereof

Examples

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preparation example Construction

[0055] The preparation method of described chitosan derivative comprises:

[0056] 1) Add 1 part by weight of chitosan (the degree of deacetylation is 60-80%, and the molecular weight is 100,000-300,000) into the hydrochloric acid / oxalic acid mixed solution, stirring and dissolving, and the mass fraction of hydrochloric acid in the mixed solution is 2-5%, The mass fraction of oxalic acid is 1 to 3%, add 3.5 to 5 parts by weight of 4-methacryloxyethyl trimellitic anhydride, stir and react at 50 to 60°C for 2 to 8 hours, cool to room temperature, soak the product in ethanol for dehydration, and precipitate , filter, wash with ethanol, acetone, deionized water successively, dry to obtain 4-methacryloyloxyethyl trimellitic anhydride modified chitosan;

[0057] 2) Add 4-methacryloyloxyethyl trimellitic anhydride modified chitosan into the sodium hydroxide solution, then add 2 to 3 parts by weight of benzyl glycidyl ether, stir and react at 45 to 60°C for 2 to 6 hours, Cool to room...

Embodiment 1

[0073] The present embodiment provides a chitosan derivative, which is prepared by the following method:

[0074] 1) 1 weight part of chitosan (deacetylation degree 72%, molecular weight is 200,000) is added to the hydrochloric acid / oxalic acid mixed solution of 49 weight parts (the massfraction of hydrochloric acid in the mixed solution is 3%, the massfraction of oxalic acid is 2 %), stir to dissolve, add 4.5 parts by weight of 4-methacryloyloxyethyl trimellitic anhydride, stir and react at 55°C for 6h, cool to room temperature, soak the product in ethanol for dehydration, precipitate, filter, and use ethanol, acetone, Washing with deionized water, drying at 50°C to obtain 4-methacryloyloxyethyl trimellitic anhydride modified chitosan;

[0075] 2) Add 4-methacryloyloxyethyl trimellitic anhydride modified chitosan to 50 parts by weight, 2wt% sodium hydroxide solution, add 3 parts by weight benzyl glycidyl ether, and stir for 4 hours at 50°C , cooled to room temperature, adjus...

Embodiment 2

[0077] This embodiment provides another chitosan derivative, which is prepared by the following method:

[0078] 1 weight part chitosan (deacetylation degree 72%, molecular weight is 200,000) is added to the hydrochloric acid / oxalic acid mixed solution of 49 weight parts (the massfraction of hydrochloric acid is 3%, the massfraction of oxalic acid is 2% in the mixed solution) , stir to dissolve, add 0.5 parts by weight of 4-methacryloyloxyethyl trimellitic anhydride, stir and react at 55°C for 6h, cool to room temperature, soak the product in ethanol for dehydration, precipitate, filter, and use ethanol, acetone, deionized Washing with water and drying at 50° C. to obtain 4-methacryloyloxyethyl trimellitic anhydride modified chitosan.

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Abstract

The invention provides hydrophobic decorative base paper and a preparation method thereof, and belongs to the field of decorative paper, and the hydrophobic decorative base paper is prepared by using softwood pulp and hardwood pulp as main materials, using straw pulp and hemp pulp to replace a small part of wood pulp, and using chitosan and titanium dioxide as fillers. The hydrophobic decorative base paper is prepared through the procedures of repulping, pulping, pulp mixing, net part forming, squeezing, drying, surface sizing, secondary drying, calendaring, reeling, slitting, inspecting and warehousing, and the obtained hydrophobic decorative base paper is few in flaws, high in opaqueness, good in absorption performance, excellent in tensile strength, antibacterial and mildew-proof.

Description

technical field [0001] The invention belongs to the field of decorative paper, and in particular relates to a hydrophobic decorative base paper and a preparation method thereof. Background technique [0002] Decorative base paper, also known as titanium white paper, is an indispensable material in many building materials products. It mainly plays the role of providing decorative patterns and covering the role of preventing the glue from seeping out of the bottom layer. Decorative base paper must have the following properties: 1) high opacity, good uniformity, and uniform weight; 2) good absorbency, which can make the paper impregnated evenly; 3) have certain dry and wet strength, etc. At present, the decorative base paper has made great research progress, but it still has certain defects. For example, the decorative base paper needs to have good covering ability. A low filling amount cannot meet the covering ability, while a high filling amount will reduce the absorption ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08D21H11/12D21H11/00D21H17/24D21H17/67D21H17/68D21F11/00C01G23/053C01G23/047B82Y40/00B82Y30/00
CPCC08B37/003D21H11/12D21H11/00D21H17/24D21H17/675D21H17/68D21F11/00C01G23/0532C01G23/08B82Y40/00B82Y30/00
Inventor 胡丁根陈建斌王幸马龙虎郭小锋
Owner ZHEJIANG GRANDRICH PAPER
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