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A kind of modified flat glass fiber reinforced PBT composite material and preparation method thereof

A flat glass fiber and composite material technology, applied in the field of polyester polymer material preparation, can solve the problem of inability to solve the warpage degree of glass fiber reinforced PBT composition cohesive profiles, and inability to effectively improve the compatibility of inorganic materials and organic polymers It can not effectively improve the notched impact strength and other problems, so as to increase the interface compatibility, overcome the low impact strength and reduce the warpage.

Active Publication Date: 2021-06-22
福建华塑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is limited to PVC co-extruded profiles, and cannot solve the adhesion between glass fiber reinforced PBT compositions and other materials and the degree of warping of profiles
[0013] In summary, polybutylene terephthalate, as an engineering plastic, is a semi-crystalline thermoplastic with excellent performance. In order to overcome the defects of the material itself, PBT composite materials such as PET / PBT have appeared in the prior art, but PET / PBT PBT composite materials cannot effectively improve the defects of low notched impact strength, low heat distortion temperature and large shrinkage rate
Even if the means of adding inorganic fillers is adopted, the existing composite materials cannot effectively improve the defects of poor compatibility between inorganic materials and organic polymers, and thus cannot make the composite materials improve the inherent defects such as PBT brittleness and new materials on the basis of obtaining balanced mechanical properties. Defects, such as the floating fiber problem of long glass fiber reinforced PBT materials and the low notched impact strength and low heat distortion temperature of short glass fiber reinforced materials

Method used

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  • A kind of modified flat glass fiber reinforced PBT composite material and preparation method thereof
  • A kind of modified flat glass fiber reinforced PBT composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0081] Preparation of doped modified PBT polyester

[0082] In a reactor with stirring, condensing and splitting and decompression devices, add 0.7kg terephthalic acid, 0.65kg 1,4-butanediol, 1.2g tetraisopropyl titanate and 18g mesoporous silica Nanoparticles; after reacting for 2 hours under normal pressure and 240°C, gradually reduce the pressure to 0.08-0.09KPa (total depressurization time 0.6h), and continue the polycondensation reaction for 1.5h; the intrinsic viscosity of the synthesized PBT is 0.82dL / g, Dry and set aside.

preparation example 2

[0084] Preparation of PET-ABS compound composition

[0085] (1) After drying the PET and ABS resin raw materials at a temperature of 100° C. for 4 hours according to the mass ratio of 1:0.3, they were pulverized with an engineering plastic grinder and passed through a 200-mesh sieve, and dried to obtain a PET-ABS mixed raw material;

[0086] (2) Weigh 60 parts of PET-ABS mixture after drying in the above steps, 10 parts of ethylene-methyl acrylate copolymer, 3 parts of butadiene-styrene-methyl methacrylate, 5 parts of surface-treated hollow Glass beads and 2 parts of mesoporous silica treated with silane coupling agent were stirred in a high-speed mixer for 5 minutes until uniform;

[0087] (3) Add the above-mentioned uniformly mixed materials into the feeding port of the twin-screw extruder, melt and extrude through the twin-screw extruder, granulate, and dry in an oven, then pulverize with a pulverizer and pass through a 200-mesh sieve to obtain PET-ABS Mixing composition; ...

preparation example 3

[0089] Preparation of surface-modified flat glass fibers

[0090] Configure isocyanate group propyl triethoxysilane-ethanol solution 1.2kg, so that the isocyanate group propyl triethoxysilane content is 12wt%; Glass fibers, which have a length of 500-600 μm, a width of 20-25 μm, and a thickness of 3-5 μm) are uniformly sprayed, wherein the weight ratio of glass fibers to isocyanate-propyltriethoxysilane-ethanol solution is 1:1; The treated glass fiber is placed in a drying oven, dried at 90°C to remove the solvent, and the surface-treated flat glass fiber is obtained.

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Abstract

The invention discloses a PBT composite material, the preparation raw materials of which are as follows: 70-80 parts of PBT composite resin, 10-30 parts of PET-ABS compound composition, 20-30 parts by weight of composite glass fiber, 5 parts of compatible toughening agent ‑20 parts, 3‑5 parts of surface-treated hollow glass microspheres, 1‑5 parts of mesoporous silica nanoparticles treated with a silane coupling agent, and 0‑3 parts of additives. The prepared PBT composite material effectively improves the defect of poor compatibility between inorganic materials and organic polymers, and on the basis of good notched impact strength, heat distortion temperature and shrinkage rate, the composite material can obtain balanced mechanical properties.

Description

technical field [0001] The invention relates to the field of polyester polymer material preparation, in particular to a modified flat glass fiber reinforced PBT composite material and a preparation method thereof. Background technique [0002] PBT (polybutylene terephthalate) is a polyester polymer prepared by polycondensation of terephthalic acid and butanediol. It belongs to thermoplastic engineering plastics and has low water absorption, good electrical insulation, and aging resistance. However, the disadvantages of large molding shrinkage, low notched impact strength, and poor rigidity at high temperatures limit its application. PBT / PET alloy has high temperature resistance, humidity resistance, chemical corrosion resistance, good electrical insulation performance and good mechanical properties, and is used more and more widely. However, the strength of pure PBT resin is average, it is sensitive to notch, and its heat resistance and deformation temperature are low. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L55/02C08K13/06C08K9/06C08K7/14C08K7/28C08K7/26C08J5/08C08J3/20
CPCC08J3/201C08J5/08C08J2367/02C08J2455/02C08J2467/02C08K2201/003C08K2201/004C08K2201/011C08K2201/014C08K2201/016
Inventor 林建民蔡鹏飞
Owner 福建华塑新材料有限公司
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