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Polyester composition and its preparation method

A composition and polyester technology, applied in the field of materials, can solve problems such as unsatisfactory crystallization performance, influence on tensile strength, rigid thermal deformation temperature, impact resistance, creep resistance, crystallization rate, etc., and achieve short molding time , increase the crystallization rate, and have excellent mechanical properties

Active Publication Date: 2019-06-14
SINOPLAST NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystallization performance of poly-1,4-cyclohexanedimethyl terephthalate (PCT) is still unsatisfactory, and its crystallization rate not only affects its molding processing cycle, but also directly affects its tensile strength, rigidity, thermal deformation Temperature, impact resistance, creep resistance and other physical and mechanical properties

Method used

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  • Polyester composition and its preparation method
  • Polyester composition and its preparation method
  • Polyester composition and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A polyester composition of the present embodiment is prepared from the following raw materials:

[0054]

[0055] The preparation method of above-mentioned polycarbonate composition, comprises the following steps:

[0056] (1) Place the PCT resin at 110° C., dry it for 6 hours, and cool it. Add the cooled PCT resin and the toughening agent into a high-speed mixer for pre-mixing;

[0057] (2) Add the white pigment, nucleating agent A, nucleating agent B, hindered phenolic antioxidant, phosphite antioxidant, lubricant and optical brightener to another high-speed mixer Mix, then join the obtained mixture in the high-speed mixer described in step (1) and mix;

[0058] (3) The mixture mixed in step (2) is placed in a parallel twin-screw extruder, and the glass fiber is added from the side feed of the parallel twin-screw extruder to melt and extrude, and granulate , the process parameters are as follows: the temperature of the first zone is 300°C, the temperature of the ...

Embodiment 2

[0061] A polyester composition of the present embodiment is prepared from the following raw materials:

[0062]

[0063] The preparation method of above-mentioned polycarbonate composition, comprises the following steps:

[0064] (1) Place the PCT resin at 110° C., dry it for 6 hours, and cool it. Add the cooled PCT resin and the toughening agent into a high-speed mixer for pre-mixing;

[0065] (2) Add white pigment, nucleating agent A, nucleating agent B, hindered phenolic antioxidant, phosphite antioxidant, lubricant and optical brightener to another high-speed mixer and mix, Then the mixture obtained is added to the high-speed mixer described in step (1) and mixed;

[0066] (3) The mixture mixed in step (2) is placed in a parallel twin-screw extruder, and the glass fiber is added from the side feed of the parallel twin-screw extruder to melt and extrude, and granulate , the process parameters are as follows: the temperature of the first zone is 295°C, the temperature o...

Embodiment 3

[0069] A polyester composition of the present embodiment is prepared from the following raw materials:

[0070]

[0071] The preparation method of above-mentioned polycarbonate composition, comprises the following steps:

[0072] (1) Place the PCT resin at 110°C, dry it for 6 hours, cool it, and add the cooled PCT resin and toughening agent into a high-speed mixer for pre-mixing;

[0073] (2) Add the white pigment, nucleating agent A, nucleating agent B, hindered phenolic antioxidant, phosphite antioxidant, lubricant and optical brightener to another high-speed mixer Mix, then join the obtained mixture in the high-speed mixer described in step (1) and mix;

[0074] (3) The mixture mixed in step (2) is placed in a parallel twin-screw extruder, and the glass fiber is added from the side feed of the parallel twin-screw extruder to melt and extrude, and granulate , the process parameters are as follows: the temperature of the first zone is 300°C, the temperature of the second...

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Abstract

The invention relates to a polyester composition and a preparation method thereof; the polyester composition is prepared from poly-1,4-cyclohexane dimethylene terephthalate (PCT) resin, glass fiber, nucleating agent A, nucleating agent B, a flexibilizer, an antioxidant, a lubricant and an additive. The poly-1,4-cyclohexane dimethylene terephthalate (PCT) resin has number-average molecular weight of 25000 to 30000; the nucleating agent A is sodium carboxylate organic small-molecular nucleating agent, having molecular weight of 100-200 g / mol; the nucleating agent B is an ionic polymer salt nucleating agent. The polyester composition has higher crystallizing rate so that a material takes short time to form, time cost of product processing is saved, crystallizing rate is largely increased, and the comprehensive properties of the material, such as impact property, bending performance, and thermal deformation temperature tolerance, can be better improved.

Description

technical field [0001] The invention relates to the field of materials, in particular to a polyester composition and a preparation method thereof. Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of polyols and polyacids, mainly referring to polyethylene terephthalate (PET), poly 1,4-butylene terephthalate (PBT), polyethylene terephthalate 1,4-cyclohexanedimethanol formate (PCT), polyethylene naphthalate (PCN), polyethylene naphthalate (PEN) and their copolyesters. These polyesters are relatively inexpensive and, due to their high aromatic content, have a high glass transition temperature (T g ), which imparts good heat resistance, stiffness and toughness to shaped articles made from it. However, due to the slow crystallization rate, the use and promotion of polyester, especially poly-1,4-cyclohexanedimethylene terephthalate (PCT), is limited. [0003] Polyethylene terephthalate 1,4-cyclohexanedimethanol (PCT) is a new ty...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L53/02C08K13/04C08K7/14C08K5/098C08K5/103C08K5/353B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08L67/02C08L2201/08C08L2203/20C08L2205/03C08L2205/24C08L53/02C08K13/04C08K7/14C08K5/098C08K5/103C08K5/353
Inventor 朱怀才刘小强朱正红许环杰徐文明
Owner SINOPLAST NEW MATERIAL
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