阅读说明：本技术 一种增强型改性abs树脂及其制备方法 (Enhanced modified ABS resin and preparation method thereof ) 是由 何见 周继贵 曾权 伍辉 梁明 于 2020-09-16 设计创作，主要内容包括：本发明公开了一种增强型改性ABS树脂及其制备方法,所述增强型改性ABS树脂按重量份数计包括：ABS树脂80～120份,丙烯腈-苯乙烯树脂20～30份,玻璃纤维13～67份,玻璃微珠4.5～6份,苯乙烯-马来酸酐共聚物6～8份,马来酸酐接枝聚丙烯4.5～6份,ABS高胶粉4.5～6份,助剂1.1～1.4份。本发明提供的增强型改性ABS树脂及其制备方法,所述增强型改性ABS树脂通过添加球状的玻璃微珠和马来酸酐接枝聚丙烯,解决了增强型ABS树脂用于注塑制件时局部发白的问题,同时又能使改性后的ABS树脂具有优异的物理机械性能,满足空调风叶对强度、热变性能的要求。(The invention discloses an enhanced modified ABS resin and a preparation method thereof, wherein the enhanced modified ABS resin comprises the following components in parts by weight: 80-120 parts of ABS resin, 20-30 parts of acrylonitrile-styrene resin, 13-67 parts of glass fiber, 4.5-6 parts of glass microsphere, 6-8 parts of styrene-maleic anhydride copolymer, 4.5-6 parts of maleic anhydride grafted polypropylene, 4.5-6 parts of ABS high-rubber powder and 1.1-1.4 parts of auxiliary agent. According to the enhanced modified ABS resin and the preparation method thereof provided by the invention, the problem that the enhanced ABS resin is partially whitish when used for injection molding parts is solved by adding the spherical glass beads and the maleic anhydride grafted polypropylene, and meanwhile, the modified ABS resin has excellent physical and mechanical properties and meets the requirements of air-conditioning fan blades on strength and thermal performance.)

1. The reinforced modified ABS resin is characterized by comprising the following components in parts by weight: 80-120 parts of ABS resin, 20-30 parts of acrylonitrile-styrene resin, 13-67 parts of glass fiber, 4.5-6 parts of glass microsphere, 6-8 parts of styrene-maleic anhydride copolymer, 4.5-6 parts of maleic anhydride grafted polypropylene, 4.5-6 parts of ABS high-rubber powder and 1.1-1.4 parts of auxiliary agent.

2. The reinforced modified ABS resin according to claim 1, wherein the ABS resin is a mixture of ABS resin HI-121H and ABS resin HP-181.

3. The reinforced modified ABS resin according to claim 2, wherein the weight ratio of the ABS resin HI-121H to the ABS resin HP-181 is 1: 3.

4. The reinforced modified ABS resin according to claim 1, wherein the glass beads are hollow glass beads having a particle size of 30 to 60 μm.

5. The reinforced modified ABS resin of claim 1, wherein the additives include antioxidants, coupling agents, and melt index modifiers.

6. The reinforced modified ABS resin according to claim 5, wherein the weight ratio of the antioxidant, the coupling agent and the melt index modifier is 1:2.

7. The reinforced modified ABS resin of claim 5, wherein the melt index modifier comprises ethylene bis stearamide and calcium stearate.

8. The reinforced modified ABS resin of claim 5, wherein the antioxidant is a mixture of hindered phenolic antioxidants and phosphite antioxidants.

9. A preparation method of an enhanced modified ABS resin, which is characterized in that the enhanced modified ABS resin is the enhanced modified ABS resin of any one of claims 1-8, and the method comprises the following steps: taking ABS resin, acrylonitrile-styrene resin, glass fiber, glass microsphere, styrene-maleic anhydride copolymer, maleic anhydride grafted polypropylene, ABS high-rubber powder and an auxiliary agent according to a ratio, stirring and mixing the ABS resin, the acrylonitrile-styrene resin, the glass microsphere, the styrene-maleic anhydride copolymer, the maleic anhydride grafted polypropylene, the ABS high-rubber powder and the auxiliary agent, then putting the mixed materials into a double-screw feeding barrel, adding the glass fiber, extruding and granulating through an extruder to obtain the enhanced modified ABS resin particles.

10. The method for preparing the reinforced modified ABS resin according to claim 9, wherein the temperature of each section of the extruder is as follows: the temperature of the first zone is 180-195 ℃, the temperature of the second zone is 195-210 ℃, the temperature of the third zone is 195-210 ℃, the temperature of the fourth zone is 210-230 ℃, the temperature of the fourth zone is 225-235 ℃, the temperature of the fourth zone is 7-235 ℃, the temperature of the fourth zone is 225-235 ℃, the temperature of the fourth zone is 9-230 ℃.

Technical Field

The invention relates to the technical field of high polymer materials, in particular to an enhanced modified ABS resin and a preparation method thereof.

Background

ABS plastics have high strength and hardness, excellent impact resistance and toughness, and heat resistance and corrosion resistance, and thus are one of the most widely used engineering thermoplastic plastics having the largest production capacity at present, and are widely used in the manufacture of machines, automobiles, home appliances, and the like. The axial flow fan blade of the outdoor unit of the air conditioner is a moving part and is in a high-temperature or low-temperature environment for a long time, so that the stability of the performance of the whole machine can be ensured only by requiring high tensile strength and bending strength, good heat resistance and small linear expansion coefficient of the blade. ABS plastics are widely applied to manufacturing axial flow fan blades for air conditioners due to excellent performance. However, the common ABS has a large shrinkage rate, and the strength and weather resistance cannot meet the requirements of the air conditioner impeller, and in the prior art, the glass fiber is usually added into the ABS to modify the ABS so as to improve the strength and reduce the shrinkage rate. However, the glass fiber modified reinforced ABS resin has improved rigidity, heat resistance and strength. However, when the enhanced ABS resin is used for injection molding, for example, after the air-conditioning fan blade obtained by injection molding is placed in a natural environment for 6 to 12 hours, the central position of the stem of the fan blade is along the direction of the fan blade from inside to outside, and the color gradually changes into white locally along with the change of time, and the white fan blade also has a deformation or warping phenomenon, thereby causing unqualified product quality and increasing product cost.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a reinforced modified ABS resin and a preparation method thereof, and aims to overcome the defect that the local color of the conventional glass fiber reinforced ABS resin is easily whitish in an injection molded product.

In order to achieve the purpose, the invention adopts the following technical scheme:

the reinforced modified ABS resin comprises the following components in parts by weight: 80-120 parts of ABS resin, 20-30 parts of acrylonitrile-styrene resin, 13-67 parts of glass fiber, 4.5-6 parts of glass microsphere, 6-8 parts of styrene-maleic anhydride copolymer, 4.5-6 parts of maleic anhydride grafted polypropylene, 4.5-6 parts of ABS high-rubber powder and 1.1-1.4 parts of auxiliary agent.

In the reinforced modified ABS resin, the ABS resin is a mixture of ABS resin HI-121H and ABS resin HP-181.

In the reinforced modified ABS resin, the weight ratio of the ABS resin HI-121H to the ABS resin HP-181 is 1: 3.

In the enhanced modified ABS resin, the glass beads are hollow glass beads, and the particle size of the glass beads is 30-60 mu m.

In the enhanced modified ABS resin, the auxiliary agent comprises an antioxidant, a coupling agent and a melt index regulator.

In the enhanced modified ABS resin, the weight ratio of the antioxidant to the coupling agent to the melt index regulator is 1:2.

In the reinforced modified ABS resin, the melt index regulator comprises ethylene bis stearamide and calcium stearate.

In the reinforced modified ABS resin, the antioxidant is a mixture of hindered phenol antioxidant and phosphite antioxidant.

A preparation method of an enhanced modified ABS resin, wherein the enhanced modified ABS resin is the enhanced modified ABS resin, and the method comprises the following steps: taking ABS resin, acrylonitrile-styrene resin, glass fiber, glass microsphere, styrene-maleic anhydride copolymer, maleic anhydride grafted polypropylene, ABS high-rubber powder and an auxiliary agent according to a ratio, stirring and mixing the ABS resin, the acrylonitrile-styrene resin, the glass microsphere, the styrene-maleic anhydride copolymer, the maleic anhydride grafted polypropylene, the ABS high-rubber powder and the auxiliary agent, then putting the mixed materials into a double-screw feeding barrel, adding the glass fiber, extruding and granulating through an extruder to obtain the enhanced modified ABS resin particles.

In the preparation method of the enhanced modified ABS resin, the temperature of each section of the extruder is as follows: the temperature of the first zone is 180-195 ℃, the temperature of the second zone is 195-210 ℃, the temperature of the third zone is 195-210 ℃, the temperature of the fourth zone is 210-230 ℃, the temperature of the fourth zone is 225-235 ℃, the temperature of the fourth zone is 7-235 ℃, the temperature of the fourth zone is 225-235 ℃, the temperature of the fourth zone is 9-230 ℃.

Has the advantages that:

the invention provides an enhanced modified ABS resin and a preparation method thereof, wherein the enhanced modified ABS resin is added with spherical glass beads and maleic anhydride grafted polypropylene, so that the problem that the enhanced ABS resin is partially whitish when used for injection molding parts is solved. The glass beads have a bead effect, the defect that different parts of a system are not uniformly shrunk due to different orientations can be overcome, so that different parts of a product are uniformly stressed in all directions during shrinkage, and are not deformed in a concave-convex manner, and local whitening caused by nonuniform shrinkage is avoided; the maleic anhydride grafted polypropylene can improve the dispersibility and compatibility of glass fibers in a system, so that the uniform stress among molecules in a product is ensured, the deformation caused by the nonuniform stress of the glass fibers on the transverse or longitudinal direction of each component molecule in the system is avoided, meanwhile, the maleic anhydride grafted polypropylene has a polar group, so that the compatibility of pigment and the glass fibers can be improved, the coloring capacity of the system is obviously improved, the whitening phenomenon caused by nonuniform coloring and nonuniform stress of pigment molecules in the process of shrinking a part is avoided, and the product quality is improved.

Detailed Description

The invention provides an enhanced modified ABS resin and a preparation method thereof, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides an enhanced modified ABS resin, which comprises the following components in parts by weight: 80-120 parts of ABS resin, 20-30 parts of acrylonitrile-styrene resin, 13-67 parts of glass fiber, 4.5-6 parts of glass microsphere, 6-8 parts of styrene-maleic anhydride copolymer, 4.5-6 parts of maleic anhydride grafted polypropylene, 4.5-6 parts of ABS high-rubber powder and 1.1-1.4 parts of auxiliary agent.

According to the reinforced modified ABS resin with the proportion, the glass beads and the maleic anhydride grafted polypropylene are added into a glass fiber-ABS system, and the glass beads have an isotropic effect through the bead effect of the glass beads, so that the problem of inconsistent local shrinkage rate of materials caused by different orientations can be solved, and local whitening of products is avoided; the maleic anhydride grafted polypropylene can improve the compatibility of glass fiber in ABS, improve the coloring capability of the pigment and avoid the phenomenon that pigment molecules are locally whitened due to uneven transverse or longitudinal stress.

Specifically, in the reinforced modified ABS resin with the above ratio, the ABS resin is a terpolymer of acrylonitrile (a) -butadiene (B) -styrene (S), and has characteristics of acrylonitrile, butadiene, and styrene, and the ABS resin specifically includes three main components, namely a graft copolymer using polybutadiene AS a main chain and a copolymer of styrene and acrylonitrile AS a branched chain, a random copolymer of styrene and acrylonitrile (AS resin), and ungrafted free polybutadiene, and the three main components have different contents and show different performances. The present invention employs a mixture of ABS resin HI-121H and ABS resin HP-181 provided by LG corporation of korea as a main component, wherein the ABS resin HI-121H has high rigidity, and the ABS resin HP-181 has good heat resistance and impact resistance, and combining the two, ABS resin having good rigidity, heat resistance and impact resistance can be obtained. Preferably, when the weight ratio of the ABS resin HI-121H to the ABS resin HP-181 is 1:3, the rigidity, the heat resistance and the impact resistance are better.

Specifically, in the reinforced modified ABS resin with the above proportion, the glass beads are internally filled with N₂、CO₂The main chemical components of the closed micro spheres comprise silicon dioxide, aluminum oxide, zirconium oxide, magnesium oxide and sodium silicate, and the closed micro spheres are inorganic fillers, have small temperature change and can improve the dimensional stability of injection molding products; because the glass beads are spherical fine particles, the fluidity is good, the bead effect can be generated, the viscosity of the mixed material is reduced, the mold filling effect is improved, andso that the enhanced modified ABS resin has good processing performance; more importantly, the glass beads are spherical and isotropic, so that the defect that the shrinkage rates of different parts of the system are inconsistent due to different orientations can be overcome, the different parts of the injection molding product are stressed consistently in the isotropic direction during shrinkage, and the injection molding product cannot deform in a concave-convex manner, so that local whitening caused by inconsistent shrinkage is avoided.

Preferably, the glass beads are hollow glass beads, and the particle size of the glass beads is 30-60 mu m. The hollow glass beads are light in weight, the basis weight of the product can be reduced, the hollow structure of the hollow glass beads enables the hollow glass beads to have special heat insulation performance, the product can be protected from thermal shock caused by rapid heating and rapid cooling conditions or the alternate change of the rapid heating and the rapid cooling, and the size of the product is more stable. When the particle size of the hollow glass beads is 30-60 mu m, the dispersion in the ABS resin is better, and the processability and the size stability of the resin are better.

In the reinforced modified ABS resin, the maleic anhydride grafted polypropylene can be used as a coupling agent of ABS and glass fiber, and a polar group is introduced into a polypropylene molecular chain and can be combined with polar glass fiber and non-polar ABS resin, so that the dispersibility and compatibility of the glass fiber in the ABS resin are improved, and after the material is injection molded, all components are stressed uniformly, and the problem of shrinkage deformation of a product is solved. Furthermore, the maleic anhydride grafted polypropylene can improve the coloring capacity of the pigment in a system, and because the binding force of the pigment molecules with the glass fiber and the ABS resin is different, the dispersion uniformity of the pigment molecules in the glass fiber and the ABS resin is not consistent, and the distribution of transverse and longitudinal forces among molecules is not balanced due to the non-uniform dispersion, so that the pigment is partially whitened when the shrinkage is inconsistent, and the maleic double grafted polypropylene can uniformly disperse the pigment in a glass fiber inorganic phase and an ABS organic polymer phase and can improve the uniform dispersion of the glass fiber in the ABS organic polymer phase, so that the components are uniformly stressed and uniformly shrunk, the stress of the pigment molecules is uniform in the shrinkage process, the dispersion is unchanged, and the color change is prevented from being whitened.

In the reinforced modified ABS resin with the above proportion, the acrylonitrile-styrene resin is colorless and transparent thermoplastic resin (AS resin), has excellent hardness, rigidity, dimensional stability and high temperature resistance, and has good compatibility with the ABS resin, and because the AS resin is one of the main components in the ABS resin, the addition of the AS resin into the ABS resin is equivalent to the increase of the proportion of the AS resin in the ABS resin, the hardness and rigidity of the ABS resin are improved, and the dimensional stability, the tensile strength and the bending strength of a product are improved.

Specifically, in the reinforced modified ABS resin with the above proportion, the glass fiber can improve the strength of ABS, increase the toughness of products and improve the stability of products.

In the reinforced modified ABS resin, the styrene-maleic anhydride copolymer can be used as a coupling agent and a compatilizer of ABS, glass fibers and glass beads, the dispersibility of the glass fibers in the resin is improved, the glass fibers are uniformly and orderly dispersed, so that the stress of injection molded parts is consistent, the problem of product whitening is relieved, and the effects of physical properties, mechanical properties and colorability of the reinforced ABS resin are further improved.

Specifically, in the reinforced modified ABS resin, the auxiliary agent comprises an antioxidant, a coupling agent and a melt index regulator. The antioxidant can delay and inhibit the degradation of the product and prolong the service life of the product; the coupling agent can be used for carrying out surface modification on glass beads and glass fibers, so that the compatibility of the glass beads and the glass fibers with ABS resin is improved, preferably, the coupling agent is a liquid coupling agent, and pigment is wetted and adsorbed on the resin while the compatibility of the glass fibers is improved, so that the pigment is dispersed more uniformly; the melt index regulator can improve the viscosity of the system, make the punching easier and improve the processing performance. Preferably, in the auxiliary agent, when the weight ratio of the antioxidant to the coupling agent to the melt-index regulator is 1:2, the auxiliary agent has a better improvement effect on the performance of a system and subsequent products.

Specifically, in the auxiliary agent, the melt finger regulator comprises ethylene bis stearamide and calcium stearate. The ethylene bis stearamide and the calcium stearate can improve the melt index of a system, improve the fluidity of the system and have the functions of lubrication and demolding.

Specifically, in the auxiliary agent, the antioxidant is a mixture of a hindered phenol antioxidant and a phosphite antioxidant. The hindered phenol antioxidant is 1010, the phosphite antioxidant is 168, and the hindered phenol antioxidant and the phosphite antioxidant are compounded for use, so that the antioxidant has a synergistic effect and has a long-acting and stable antioxidant effect. Preferably, when the weight ratio of the antioxidant 1010 to the antioxidant 168 is 1:1, the antioxidant has excellent antioxidant effect.

The invention also discloses a preparation method of the enhanced modified ABS resin, which comprises the following steps: taking ABS resin, acrylonitrile-styrene resin, glass fiber, glass microsphere, styrene-maleic anhydride copolymer, maleic anhydride grafted polypropylene, ABS high-rubber powder and various additives according to a ratio, firstly melting, stirring and mixing the ABS resin, the acrylonitrile-styrene resin, the glass microsphere, the styrene-maleic anhydride copolymer, the maleic anhydride grafted polypropylene, the ABS high-rubber powder, an antioxidant and a melt index regulator, then adding a coupling agent for low-speed stirring and mixing uniformly, then adding a pigment, continuing to stir and mix uniformly at a low speed, then putting the mixed material into a double-screw feeding barrel, simultaneously adding the glass fiber, and mixing, extruding and granulating through a screw extruder to obtain the enhanced modified ABS resin particles.

Specifically, in the preparation method of the reinforced modified ABS resin, the temperature of each section of the extruder is as follows: the temperature of the first zone is 180-195 ℃, the temperature of the second zone is 195-210 ℃, the temperature of the third zone is 195-210 ℃, the temperature of the fourth zone is 210-230 ℃, the temperature of the fourth zone is 225-235 ℃, the temperature of the fourth zone is 7-235 ℃, the temperature of the fourth zone is 225-235 ℃, the temperature of the fourth zone is 9-230 ℃. Through the mixing of each section of the extruder, all the components are uniformly mixed and subjected to plasticizing reaction, so that the enhanced modified ABS resin particles with high strength, good rigidity and heat resistance and small shrinkage are obtained.

The enhanced modified ABS resin has the characteristics of excellent strength and toughness, good rigidity, good heat resistance and small shrinkage rate, has stable performance, does not turn white, has stable size and excellent performance when being used for preparing various workpieces, and can meet various requirements of air-conditioning fan blades.