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Nanometer cellulose functional doped modified paint and preparation method thereof

A nano-scale cellulose and nano-cellulose technology, applied in polyester coatings, epoxy resin coatings, anti-fouling/underwater coatings, etc., can solve problems such as cracks in coatings, aesthetics, and house leakage, and achieve protection and safety , improve quality and performance, increase the effect of toughness

Active Publication Date: 2018-12-21
清远粤绿新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main reason is that the cement base material of the building wall leaves surface cracks, pores and other defects during construction, and these defects will cause cracks in the paint attached to the surface, which not only affects the appearance, but also causes house leakage
At present, the more effective method is to use epoxy resin to repair cracks or use other paints to repair, but it causes a secondary process and cannot fundamentally solve the quality problem of the paint.

Method used

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  • Nanometer cellulose functional doped modified paint and preparation method thereof
  • Nanometer cellulose functional doped modified paint and preparation method thereof
  • Nanometer cellulose functional doped modified paint and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] A nanoscale cellulose functional doped modified coating and a preparation method thereof, comprising the following steps and process conditions:

[0017] (1) Preparation of nanocellulose: Separate nanocellulose with a diameter of 10 nm from pine raw materials by purely mechanical methods, and mix it uniformly in a high-speed shearing machine at room temperature to form a water-based solution with a mass fraction of 0.01%. The main purpose of nanocellulose dispersion is to meet the interface requirements of different water-based coatings.

[0018] (2) Nanocellulose modification process: After stirring and mixing nanocellulose and sodium chloroacetate according to the mass ratio of 1:4 and dispersing them in water, raise the temperature to 90°C, react for 5 hours, and then remove the residual water-soluble The modified reagent and its by-products were used to disperse the reacted nanocellulose in water to obtain a hydrophilic nanocellulose dispersion A with a mass fractio...

Embodiment 2

[0025] A nanoscale cellulose functional doped modified coating and a preparation method thereof, comprising the following steps and process conditions:

[0026] (1) Preparation of nanocellulose: The nanocellulose with a diameter of 50nm is separated from the poplar raw material by TEMPO oxidation pretreatment in parallel with mechanical homogenization. The main purpose of functional modification is to adapt to different solvent-based coatings. Interface requirements.

[0027] (2) Nanocellulose modification process: Mix nanocellulose and dodecyl carboxylic acid modification agent according to the mass ratio of 1:3, stir and mix them and disperse them in absolute ethanol, then raise the temperature to 150°C , reacted for 3 h, and then dispersed the reacted nanocellulose in ethanol by removing the residual modifying reagent and its by-products to obtain a hydrophobic nanocellulose dispersion B with a mass fraction of 0.1%.

[0028] (3) Preparation of nanocellulose-doped coating:...

Embodiment 3

[0033] A nanoscale cellulose functional doped modified coating and a preparation method thereof, comprising the following steps and process conditions:

[0034] (1) Preparation of nanocellulose: Nanocellulose with a diameter of 30 nm is separated from straw raw materials by a purely mechanical method, dispersed in an aqueous solution, and the main purpose of functionalization is to adapt to the interface requirements of different water-based coatings.

[0035](2) Nanocellulose modification process: After stirring and mixing nanocellulose and chloroacetic acid according to the mass ratio of 1:4 and dispersing them in water, the temperature was raised to 80°C, reacted for 2 hours, and then modified by removing residual water-soluble Reactive reagents and their by-products were dispersed into water after the reaction to obtain a hydrophilic nanocellulose dispersion A with a mass fraction of 0.1%.

[0036] (2) Preparation of nanocellulose-doped coating: amino resin film-forming ag...

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Abstract

The invention discloses nanometer cellulose functional doped modified paint and a preparation method thereof. According to the nanometer cellulose functional doped modified paint and the preparation method thereof, the nanometer cellulose functional doped modified paint with one-dimensional nanometer dimensions (5-100 nm) is adopted for forming a compound system composed of a soft resin macromolecular chain structure and a hard nanometer cellulose structure with an ultra-high length-diameter ratio, surface functionalization of nanometer cellulose, a principle of the nanometer cellulose of interface structure toughening and the advantage that the one-dimensional nanometer cellulose and a macromolecular chain form a cross net are used, the tenacity, the impact resistance, the hardness and the surface strength of a paint surface layer are greatly improved, and the defects of cracks, chaps and the like, of a pant surface, caused by high or low temperature in a use process of the paint subjected to curing are overcome. The preparation method of the nanometer cellulose functional doped modified paint can be suitable for water-based paint or oil paint, and a paint product which is modified and prepared through a technology has excellent tenacity, hardness and surface strength, is low in cost, and can be applied in the field of multiple materials of woodware, metal, automobiles, plastic, glass, building surfaces and the like on a large scale.

Description

technical field [0001] The patent of the present invention relates to the manufacturing field of high-performance coatings, in particular to a nano-scale cellulose functional doped modified coating and its preparation method. The coating product can be used in interior decoration, automobiles, construction tooling, wood, metal, plastic, Large-scale application in various material fields such as glass and building surfaces. Background technique [0002] Indoor coatings are mainly divided into water-based coatings and solvent-based coatings, which are widely used in various fields such as construction, automobiles, ships, and aviation, and have a huge market capacity. At present, most architectural coatings have coating cracking phenomenon after long-term application. The main reason is that the cement base material of the building wall leaves surface cracks, pores and other defects during construction, and these defects will cause cracks in the paint attached to the surface,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D129/14C09D161/20C09D167/08C09D133/00C09D175/04C09D5/14C09D7/61C09D7/63C09D7/65
CPCC08K2003/265C08L2205/035C09D5/14C09D129/14C09D133/00C09D161/20C09D163/00C09D167/08C09D175/04C09D7/61C09D7/63C09D7/65C08L1/12C08L71/02C08L33/00C08K13/02C08K5/5397C08K5/544C08K3/346C08K3/36C08L1/10C08K5/41C08K3/26C08K13/04C08K7/26
Inventor 程凡黄小芸祁海松刘德礼蒋学兵
Owner 清远粤绿新材料技术有限公司
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