A kind of glass fiber reinforced PBT composition and its preparation method and application

A technology of composition and PBT resin, applied in the field of PBT composition, to achieve the effect of improving the filling rate of profiles

A technology of composition and PBT resin, applied in the field of PBT composition, to achieve the effect of improving the filling rate of profiles

CN105542407BActive Publication Date: 2018-05-01KINGFA SCI & TECH CO LTD
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9 and comparative example 1-9

[0052]Preparation of glass fiber reinforced PBT composition: Tetrahydrofuran and methyl siloxane are formulated into a tetrahydrofuran methyl siloxane solution with a mass fraction of 10ppm-900ppm; the tetrahydrofuran methyl siloxane solution is mixed with the PBT The resin and additives are mixed in a high-speed mixer for 1 minute to 2 minutes to obtain a premix, which is melted and extruded by a twin-screw extruder at 220°C-240°C, fed to the side of the glass fiber, cooled, and granulated to obtain Glass fiber reinforced PBT composition; the temperature of each screw barrel of the twin-screw extruder (from the feeding port to the head) is: 160°C, 220°C, 230°C, 240°C, 240°C, 220°C, and the screw speed is 300 rpm, feed rate 60kg / h.

[0053] Preparation of glass fiber reinforced PBT composition and PVC co-extruded profile: the glass fiber reinforced PBT composition and PVC prepared above are respectively passed through two single-screw extruders into the profile cavity, wherein...

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Abstract

The invention discloses a glass fiber reinforced PBT composition. The glass fiber reinforced PBT composition comprises, by weight, 40-70 parts of PBT resin and 30-60 parts of glass fibers; based on the total weight of the glass fiber reinforced PBT composition, the content of tetrahydrofuran is smaller than or equal to 450 ppm and greater than or equal to 25 ppm. According to the glass fiber reinforced PBT composition and the preparation method and application thereof, tetrahydrofuran is selected and added to the formula of the glass fiber reinforced PBT composition, wherein the content of tetrahydrofuran is smaller than or equal to 450ppm and greater than or equal to 25 ppm based on the total weight of the glass fiber reinforced PBT composition, so that when the glass fiber reinforced PBT composition and PVC are jointly used for extruding a profile, the filling rate of the profile can be obviously raised, cohesiveness of the glass fiber reinforced PBT composition and PVC can be obviously improved, and the warping degree of the profile can be obviously improved.

Description

technical field [0001] The invention relates to a PBT composition, in particular to a glass fiber reinforced PBT composition and its preparation method and application. Background technique [0002] Polybutylene terephthalate (PBT) is a semi-crystalline engineering plastic with good mechanical properties, electrical properties, heat resistance and chemical resistance, etc. It is widely used in automobiles, electronics, electrical appliances and other industries . However, PBT still has deficiencies, such as the low filling rate of PBT materials in the process of co-extruding profiles with PVC, the poor adhesion between PBT and PVC, and the degree of profile warping, which limits its application in the above industries. [0003] Under the premise of not affecting the mechanical and processing properties of PBT materials, the requirements for improving the profile filling rate, the adhesion between PBT materials and PVC, and the degree of warping of profiles during the co-ext...

Claims

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Application Information

Patent Timeline
01 May 2018
Publication
CN105542407B
IPC
C08L67/02; C08K7/14; B29C47/92; B29C48/92
CPC
B29C48/92; B29C2948/9258; B29C2948/92704; C08K7/14; C08K2201/003; C08L67/02
Inventors
陈锋; 朱文