阅读说明：本技术 一种橡塑钕铁硼磁体的表面喷涂处理材料及处理方法 (Surface spraying treatment material and treatment method for rubber-plastic neodymium-iron-boron magnet ) 是由 赵宇航 杜军杰 曹江 于 2019-11-06 设计创作，主要内容包括：本发明属于钕铁硼材料技术领域,公开了一种橡塑钕铁硼磁体的表面喷涂处理材料及处理方法。本发明的橡塑钕铁硼磁体的表面喷涂处理材料包含丙烯酸氨基甲酸涂料、稀释剂、固化剂,且丙烯酸氨基甲酸涂料、稀释剂和固化剂的质量比为50～60：40～50：1～1.5。采用本发明新型的丙烯酸氨基甲酸涂料进行表面喷涂,对橡胶类素材具有优良的附着性。同时由于涂料的流动性可以调节,可以反复多次喷涂调整涂层的厚度,附着力非常强,与之前的水性聚氨酯、UV等涂料相比具有更好的厚度控制优势,柔韧性及延展性也得到了一个质的飞跃。且该涂料是一种弹性涂料,对橡胶钕铁硼产品表面起到了非常好的保护作用,可用于马达电机、磁性密封、办公电器等领域。(The invention belongs to the technical field of neodymium iron boron materials, and discloses a surface spraying treatment material and a treatment method for a rubber-plastic neodymium iron boron magnet. The surface spraying treatment material for the rubber-plastic neodymium-iron-boron magnet comprises an acrylic carbamate coating, a diluent and a curing agent, wherein the mass ratio of the acrylic carbamate coating to the diluent to the curing agent is 50-60: 40-50: 1 to 1.5. The novel acrylic carbamate paint has excellent adhesiveness to rubber materials when being used for surface spraying. Meanwhile, the fluidity of the coating can be adjusted, the coating can be sprayed repeatedly for multiple times to adjust the thickness of the coating, the adhesive force is very strong, the coating has better thickness control advantage compared with the prior coatings such as waterborne polyurethane, UV and the like, and the flexibility and the ductility are greatly improved. The coating is an elastic coating, has a very good protection effect on the surface of a rubber neodymium iron boron product, and can be used in the fields of motor motors, magnetic sealing, office appliances and the like.)

1. The utility model provides a surface spraying processing material of rubber and plastic neodymium iron boron magnet, its characterized in that, the surface spraying processing material of rubber and plastic neodymium iron boron magnet contains acrylic acid carbamic acid coating, diluent, curing agent, and the quality ratio of acrylic acid carbamic acid coating, diluent and curing agent is 50 ~ 60: 40-50: 1 to 1.5.

2. The surface spray coating material for a rubber-plastic neodymium-iron-boron magnet according to claim 1, wherein the acrylic urethane coating comprises 17 to 17.5 parts of toluene, 12 to 13 parts of butyl acetate, 9 to 9.5 parts of 4-methyl-2-pentanone, 7.5 to 8 parts of ethylbenzene, 7 to 7.5 parts of mixed xylene, 7 to 7.5 parts of silica gel, 3.5 to 4 parts of isobutyl acetate, 1.3 to 1.7 parts of 2-butanone, 1 to 1.5 parts of carbon black, 0.5 to 1 part of ethanol, 0.2 to 0.4 part of ethylene glycol butyl ether, 0.1 to 0.3 part of methyl methacrylate, 0.05 to 0.15 part of isopropanol, and 0.05 to 0.15 part of butyl acrylate.

3. The surface spray coating material for a rubber-plastic neodymium-iron-boron magnet according to claim 2, wherein the acrylic carbamate coating comprises, by weight, 17.1 parts of toluene, 12.5 parts of butyl acetate, 9.3 parts of 4-methyl-2-pentanone, 7.8 parts of ethylbenzene, 7.2 parts of mixed xylene, 7.1 parts of silica gel, 3.7 parts of isobutyl acetate, 1.5 parts of 2-butanone, 1.2 parts of carbon black, 0.7 part of ethanol, 0.3 part of ethylene glycol butyl ether, 0.2 part of methyl methacrylate, 0.1 part of isopropanol, and 0.1 part of butyl acrylate.

4. The surface spraying treatment material for the rubber-plastic neodymium-iron-boron magnet, according to claim 1, is characterized in that the diluent comprises, by weight, 20-30 parts of propylene glycol methyl ether acetate, 10-20 parts of toluene, 10-20 parts of ethylbenzene, 10-20 parts of mixed xylene, 5-10 parts of butyl acetate, 5-10 parts of 4-methyl-2-pentanone and 0-5 parts of cycloethanone.

5. The surface spraying treatment material for the rubber-plastic neodymium-iron-boron magnet, according to claim 4, is characterized in that the diluent comprises, by weight, 25 parts of propylene glycol methyl ether acetate, 15 parts of toluene, 15 parts of ethylbenzene, 15 parts of mixed xylene, 8 parts of butyl acetate, 8 parts of 4-methyl-2-pentanone and 3 parts of cycloethanone.

6. The surface spraying treatment material for the rubber-plastic neodymium-iron-boron magnet as claimed in claim 1, wherein the curing agent is a mixture containing isocyanate and toluene, and the mass ratio of the isocyanate to the toluene is 3-4: 1 to 2.

7. The surface spraying treatment material for the rubber-plastic neodymium-iron-boron magnet according to claim 6, wherein the mass ratio of isocyanate to toluene in the curing agent is 7: 3.

8. the surface spraying treatment method of the rubber-plastic neodymium-iron-boron magnet is characterized by comprising the following steps:

(1) preparing the surface spraying treatment material of the rubber-plastic neodymium-iron-boron magnet according to any one of claims 1 to 7, and then mixing and vibrating for 5 to 10 minutes to uniformly disperse the material;

(2) spraying: pouring the uniformly dispersed treatment material into automatic spraying equipment for spraying;

(3) and (3) drying: and drying the sprayed product.

9. The surface spraying treatment method for the rubber-plastic neodymium-iron-boron magnet according to claim 8, wherein the coating viscosity in the step (2) is 13 ± 2s/HIS (20 ℃), the diameter of the spray gun is 0.8-1.5 mm phi, the spraying pressure is 0.3-0.5 Mpa, and the spraying output is 45 ± 5 g.

10. The surface spraying treatment method for the rubber-plastic neodymium-iron-boron magnet according to claim 8, wherein the drying temperature in the step (3) is controlled to be 80-100 ℃, the drying time is controlled to be 25-35 min, and the coating is placed in a natural ventilation mode after being cured and is naturally cured for more than 24 hours.

Technical Field

The invention relates to the technical field of neodymium iron boron materials, in particular to a surface spraying treatment material and a surface spraying treatment method for a rubber-plastic neodymium iron boron magnet.

Background

The neodymium iron boron material belongs to a high-performance metal magnetic material, the traditional processing technology is sintering electroplating, and the product has high hardness, high density, heavy weight and large volume. And then, processes such as die pressing, injection molding and the like of epoxy resin and other adhesives with neodymium iron boron are developed, and the processing is carried out by adopting a mode of spraying insulating protective paint, so that the product has higher hardness and lighter weight. Finally, due to market demands, flexible rubber neodymium iron boron is developed, the product is thin in thickness, small in size, light in weight, high in performance and capable of being bent and cut freely, and more electronic and electric products select small and light flexible rubber neodymium iron boron products. However, the neodymium iron boron rubber can not be electroplated or sprayed with insulating paint, and can be cracked easily, so that the surface can be protected from being oxidized by spraying with polyurethane paint and UV oil. And because polyurethane coating and UV coating because the surface coating is thin, flexibility and ductility use in general environment and have no problem, but the protection effect is not very ideal in some severe service environment, and flexibility and ductility can not reach service environment's requirement, and rubber neodymium iron boron product still can have the risk of oxidizing.

In addition, although the polyurethane coating has certain flexibility, the nozzle is blocked up in the easy solidification of waterborne polyurethane coating in processing, and the coating produces the caking easily, causes the product to show the spraying uneven, and polyurethane coating is relatively poor because of mobility is good simultaneously, the coating thickness of spraying, and the associativity with rubber neodymium iron boron is relatively poor, drops easily, in comparatively abominable service environment, has the risk of rubber neodymium iron boron oxidation. Adopt ultraviolet ray UV glue to carry out sealing treatment to neodymium iron boron both ends, the processing mode is more complicated, carries out the viscose processing back reuse ultraviolet ray to the both ends that the product is sealed and carries out the illumination solidification, and the processing time is of a specified duration to ultraviolet ray UV glue does not have the pliability after the solidification, and the crooked back glue of product can the fracture, can't play the guard action, therefore this mode is only applicable to the product that the section sealed was handled, can't handle the surface.

Disclosure of Invention

The invention aims to overcome the defects of the background technology and provides a surface spraying treatment material and a surface spraying treatment method for a rubber-plastic neodymium-iron-boron magnet.

In order to achieve the purpose of the invention, the surface spraying treatment material for the rubber-plastic neodymium-iron-boron magnet comprises an acrylic carbamate coating, a diluent and a curing agent, wherein the mass ratio of the acrylic carbamate coating to the diluent to the curing agent is 50-60: 40-50: 1 to 1.5.

Further, the acrylic carbamate coating comprises, by weight, 17-17.5 parts of toluene, 12-13 parts of butyl acetate, 9-9.5 parts of 4-methyl-2-pentanone, 7.5-8 parts of ethylbenzene, 7-7.5 parts of mixed xylene, 7-7.5 parts of silica gel, 3.5-4 parts of isobutyl acetate, 1.3-1.7 parts of 2-butanone, 1-1.5 parts of carbon black, 0.5-1 part of ethanol, 0.2-0.4 part of ethylene glycol butyl ether, 0.1-0.3 part of methyl methacrylate, 0.05-0.15 part of isopropanol and 0.05-0.15 part of butyl acrylate. The acrylic urethane coating has very excellent properties in softness and elongation, and has excellent adhesion to various rubber materials.

Preferably, the acrylic carbamate coating comprises, by weight, 17.1 parts of toluene, 12.5 parts of butyl acetate, 9.3 parts of 4-methyl-2-pentanone, 7.8 parts of ethylbenzene, 7.2 parts of mixed xylene, 7.1 parts of silica gel, 3.7 parts of isobutyl acetate, 1.5 parts of 2-butanone, 1.2 parts of carbon black, 0.7 part of ethanol, 0.3 part of butyl cellosolve, 0.2 part of methyl methacrylate, 0.1 part of isopropanol and 0.1 part of butyl acrylate.

Further, the diluent comprises, by weight, 20-30 parts of propylene glycol methyl ether acetate, 10-20 parts of toluene, 10-20 parts of ethylbenzene, 10-20 parts of mixed xylene, 5-10 parts of butyl acetate, 5-10 parts of 4-methyl-2-pentanone and 0-5 parts of cycloethanone. The diluent is colorless transparent liquid, is a special diluent for the acrylic carbamate paint, and has moderate reaction, good paint dispersibility and stable comprehensive performance by using the diluent in the proportion.

Preferably, the diluent comprises 25 parts of propylene glycol methyl ether acetate, 15 parts of toluene, 15 parts of ethylbenzene, 15 parts of mixed xylene, 8 parts of butyl acetate, 8 parts of 4-methyl-2-pentanone and 3 parts of cycloethanone by weight.

Further, the curing agent is a special curing agent for the acrylic carbamate coating, and is a mixture containing isocyanate and toluene, wherein the mass ratio of the isocyanate to the toluene is 3-4: 1 to 2.

Preferably, the mass ratio of isocyanate to toluene in the curing agent is 7: 3.

in order to achieve the purpose of the invention, the surface spraying treatment method of the rubber-plastic neodymium-iron-boron magnet comprises the following steps:

(1) adjusting the component ratio of the surface spraying treatment material of the rubber-plastic neodymium-iron-boron magnet, and then mixing and vibrating for 5-10 minutes to uniformly disperse the surface spraying treatment material;

(2) spraying: pouring the uniformly dispersed treatment material into automatic spraying equipment for spraying;

(3) and (3) drying: and drying the sprayed product.

Preferably, the coating viscosity in the step (2) is 13 +/-2 s/HIS (20 ℃), the diameter of a spray gun is 0.8-1.5 mm phi, the spraying pressure is 0.3-0.5 MPa, and the spraying discharge is 45 +/-5 g.

Preferably, the drying temperature in the step (3) is controlled to be 80-100 ℃, the drying time is controlled to be 25-35 min, and the coating is placed in a natural ventilation mode after being cured and is naturally cured for more than 24 hours.

The invention adopts the novel acrylic carbamate paint for surface spraying, and has excellent adhesiveness to rubber materials. Meanwhile, the fluidity of the coating can be adjusted, the coating can be sprayed repeatedly for multiple times to adjust the thickness of the coating, the adhesive force is very strong, the coating has better thickness control advantage compared with the prior coatings such as waterborne polyurethane, UV and the like, and the flexibility and the ductility are greatly improved. The coating is an elastic coating, has a very good protection effect on the surface of a rubber neodymium iron boron product, can be applied to the fields of motor motors, magnetic sealing, office appliances and the like, and can be used in any environment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention. It is to be understood that the following description is only illustrative of the present invention and is not to be construed as limiting the present invention.

The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

Preferably, the acrylic urethane coating in the embodiment of the present invention comprises 17.1 parts of toluene, 12.5 parts of butyl acetate, 9.3 parts of 4-methyl-2-pentanone, 7.8 parts of ethylbenzene, 7.2 parts of mixed xylene, 7.1 parts of silica gel, 3.7 parts of isobutyl acetate, 1.5 parts of 2-butanone, 1.2 parts of carbon black, 0.7 part of ethanol, 0.3 part of butyl cellosolve, 0.2 part of methyl methacrylate, 0.1 part of isopropanol, and 0.1 part of butyl acrylate.

Preferably, the diluent in the embodiment of the invention comprises 25 parts of propylene glycol methyl ether acetate, 15 parts of toluene, 15 parts of ethylbenzene, 15 parts of mixed xylene, 8 parts of butyl acetate, 8 parts of 4-methyl-2-pentanone and 3 parts of cycloethanone.

Preferably, the curing agent in the embodiment of the invention is a special curing agent for acrylic carbamate paint, and is a mixture containing isocyanate and toluene, wherein the mass ratio of the isocyanate to the toluene is 7: 3.

further, the technical features of the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.