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Preparation method of anti-friction core-shell waterborne acrylate resin coating

A technology of water-based acrylic and ester resins, which is applied in the direction of coating, etc., can solve the problems of reduced friction, reduced compatibility of added materials and polyurethane, and large proportion of inorganic fillers, so as to reduce frictional resistance and significantly reduce drag effect of effect

Inactive Publication Date: 2019-03-15
段瑶瑶
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0009] Invention patent 201710450821.9 relates to the invention discloses a friction-reducing polyurethane coating, which is composed of material A and curing agent with a weight ratio of 2~3:1, through the esterification reaction of oleic acid and trimethylolpropane, Obtain an ester with good lubricating properties, at the same time fully organicize the inorganic lubricating filler, modify its dispersion with the polymer, form an effective synergistic lubricating effect with the obtained lubricating ester, and improve the anti-friction performance of the finished coating film , the biggest disadvantage of the present invention is that the proportion of non-aqueous and inorganic fillers is large, which reduces the compatibility between the added materials and polyurethane, and there is room for further reduction in friction

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  • Preparation method of anti-friction core-shell waterborne acrylate resin coating

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Embodiment 1

[0026] A method for preparing a friction-reducing core-shell type water-based acrylic resin coating, characterized in that: (1) Add the following raw materials in the following weight ratio to a 500ml three-necked flask: 40 g of water, 0.6 g of emulsifier (the ratio of all emulsifiers same), 0.4 g of acrylic acid, heat up to 40°C, stir for 30 minutes, add monomer A, emulsify for 30 minutes; heat up to 70°C and start to flow back water, heat up to 80°C and keep warm for 1 hour, dropwise add 0.2g of potassium persulfate (with 5g dissolved in water), the dropwise addition time continued for 1 hour, and reacted for 2 hours after the dropwise addition; then added 1 g of octamethylcyclotetrasiloxane and 1.2 g of aluminum chloride, stirred and reacted at 80° C. for 0.5 hour to obtain a core layer emulsion;

[0027] The A monomer is formed by mixing 1g of hydroxyethyl acrylate, 6g of butyl acrylate, 2g of methyl methacrylate, and 2.5g of ethyl acrylate;

[0028] (2) Add B monomer and ...

Embodiment 2

[0036] A method for preparing a friction-reducing core-shell water-based acrylic resin coating, which is characterized in that: (1) Add the following raw materials in the following weight ratio to a 500ml three-necked flask: 60 g of water, 1.4 g of emulsifier, 2.0 g of acrylic acid, Raise the temperature to 55°C, stir for 30 minutes, add A monomer, and emulsify for 60 minutes; when the temperature rises to 70°C, start to flow back water, heat up to 80°C and keep warm for 1 hour, add 0.5g of ammonium persulfate (dissolved in 5g of water), dropwise Continue for 2 hours, and react for 2 hours after the dropwise addition; then add 2 g of γ-chloropropyltriethoxysilane and 1.2 g of aluminum chloride, stir and react at 80° C. for 0.5 hours to obtain a core layer emulsion;

[0037] The A monomer is formed by mixing 2 g of hydroxyethyl acrylate, 8 g of butyl acrylate, 6 g of methyl methacrylate, and 3.5 g of ethyl acrylate;

[0038] (2) Add monomer B and 0.4g of ammonium persulfate (di...

Embodiment 3

[0046] A method for preparing a friction-reducing core-shell water-based acrylic resin coating, characterized in that: (1) Add the following raw materials in the following weight proportions to a 500ml three-necked flask: 50 g of water, 1.0 g of emulsifier, 1.2 g of acrylic acid, Raise the temperature to 48°C, stir for 30 minutes, add A monomer, and emulsify for 45 minutes; when the temperature rises to 70°C, start to flow back water, after raising the temperature to 80°C, keep warm for 1 hour, and dropwise add azobisisobutylamidine hydrochloride (AIBA, V- 50 initiator) 0.35g (dissolved with 5g water), the time of dropping continued for 1.5h, and after the dropwise addition, reacted for 2h; then added 1.5 g of 5,7-dihydroxy-4'-methoxy isoflavone and aluminum chloride 1.2g, stirred and reacted at 80°C for 0.5h to obtain a core layer emulsion;

[0047] The A monomer is formed by mixing 1.5 g of hydroxyethyl acrylate, 7 g of butyl acrylate, 4 g of methyl methacrylate, and 3 g of ...

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Abstract

The invention discloses a preparation method of an anti-friction core-shell waterborne acrylate resin coating. The preparation method comprises the following steps: adding raw materials, namely water,an emulsifying agent and acrylic acid, in weight proportions into a 500ml three-necked flask, heating, stirring for 30 min, adding a monomer A, and emulsifying; heating to 70 DEG C, beginning to introduce reflowing water, heating to 80 DEG C, then preserving heat, dropwise adding an initiator for 1-2h, and reacting for 2 hours after the completion of dropwise addition; then adding an anti-friction agent A and aluminum chloride, and reacting for 0.5h while stirring to obtain a core-layer emulsion; simultaneously dropwise adding a monomer B and the initiator into the core-layer emulsion obtained in the step (1) for 0.5h, preserving heat at 75-85 DEG C after the completion of dropwise addition, reacting for 2h while stirring, then adding the emulsifying agent and an anti-friction agent B at70 DEG C, reacting for 30min, adding ammonia water to adjust the pH value to 7-8 to obtain the waterborne acrylate resin coating; pouring the obtained acrylate resin coating into an obtained mixture template, and placing for 24-48h to obtain the anti-friction core-shell waterborne acrylate resin coating. The obtained acrylate resin has a small friction coefficient.

Description

technical field [0001] The invention belongs to the field of water-based acrylic resin coatings, and in particular relates to a preparation method of friction-reducing core-shell type water-based acrylic resin coatings. Background technique [0002] The variety of acrylic resins in China has been relatively complete, but compared with foreign advanced counterparts, there is still a certain gap in production scale, process control and some products with special performance requirements. [0003] China's architectural coatings account for 24% of acrylic coatings, which is at the middle level of development in the world. At present, China's annual output is about 500,000 tons, of which interior walls account for 60%, exterior walls account for 25%, and others account for 15%. [0004] Although the paints currently used in China are still medium and low-grade, the variety of acrylic paints in China is relatively complete. Compared with developed countries, the gap is not in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C08F220/18C08F220/20C08F220/14C08F212/08
CPCC09D133/08C08F220/18C08F220/1804C08F220/20C08F220/14C08F212/08C08F220/1802
Inventor 段瑶瑶李启同闫平洋
Owner 段瑶瑶
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