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A kind of polyester polyol for polyester engineering plastics and preparation method thereof

A technology for polyester polyols and engineering plastics, applied in the field of polyester polyols, can solve the problems of poor compatibility and dispersibility of mixtures, poor notched impact strength, poor processing fluidity, etc., to improve processing fluidity and increase melt index. , the effect of improving the elongation at break

Active Publication Date: 2021-05-14
安徽星贝达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still has problems such as poor notched impact strength, poor flexibility, and poor processing fluidity, which limit its application fields in multiple scenarios.
[0003] At present, the modification of polyester engineering plastics such as PBT is often aimed at a certain problem in the above-mentioned polyester materials, and it is rare to take into account the improvement of the overall performance of the material at the same time; and the resins and fillers added in the modification often lead to mixtures There are problems such as poor compatibility and dispersion between them, and it is often necessary to further add other additives to improve the above problems

Method used

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  • A kind of polyester polyol for polyester engineering plastics and preparation method thereof
  • A kind of polyester polyol for polyester engineering plastics and preparation method thereof

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preparation example Construction

[0057] A second aspect of the present invention provides a method for preparing polyester polyols for polyester engineering plastics, comprising the following steps: adding carboxyl compounds, polyols, and catalysts to the reactor in parts by weight, Raise the temperature to 130-150°C in a gas atmosphere, stir for 0.8-1.2 hours, then raise the temperature to 170-190°C, add solvent and remaining raw materials, keep warm and reflux for 1-2 hours, cool down and discharge the material, and remove the solvent in a vacuum to obtain polyester Polyester polyols for engineering plastics.

[0058] In a preferred embodiment, the preparation method of polyester polyol for polyester engineering plastics comprises the following steps: adding carboxyl compound, polyhydric alcohol and catalyst into the reactor in order by weight, Heat up to 140°C in an atmosphere, stir for 1.0h and then heat up to 180°C, add solvent and remaining raw materials, keep warm and reflux for 1.5h, cool down and dis...

Embodiment 1

[0066] Embodiment 1 of the present invention provides a polyester polyol for polyester engineering plastics, including the following raw materials in parts by weight: 90 parts of carboxyl compound, 68 parts of polyol, 1.8 parts of catalyst, and 100 parts of solvent.

[0067] The carboxyl compound is 1,4-cyclohexanedicarboxylic acid with an acid value of 652 mgKOH / g; the polyhydric alcohol is 3-hydroxymethylpentane-2,4-diol; the catalyst is dibutyl di Tin laurate, purchased from Hangzhou Ruike Chemical Co., Ltd., has a tin content of 17-19% (the average value is 18%); the solvent is xylene.

[0068] The preparation method of the above-mentioned polyester polyol for polyester engineering plastics comprises the following steps: adding carboxyl compounds, polyols, and catalysts into the reaction kettle in order by weight, raising the temperature to 140° C. under a nitrogen atmosphere, and stirring for 1.0 h Afterwards, heat up to 180°C, add a solvent, keep warm and reflux for 1.5 ...

Embodiment 2

[0070] Embodiment 2 of the present invention provides a polyester polyol for polyester engineering plastics, including the following raw materials in parts by weight: 80 parts of carboxyl compound, 50 parts of polyol, 1 part of catalyst, and 60 parts of solvent.

[0071] The carboxyl compound is 1,4-cyclohexanedicarboxylic acid with an acid value of 652 mgKOH / g; the polyhydric alcohol is 3-hydroxymethylpentane-2,4-diol; the catalyst is dibutyl di Tin laurate, purchased from Hangzhou Ruike Chemical Co., Ltd., has a tin content of 17-19% (the average value is 18%); the solvent is xylene.

[0072] The preparation method of the above-mentioned polyester polyol for polyester engineering plastics comprises the following steps: adding carboxyl compounds, polyols, and catalysts into the reaction kettle in sequence by weight, raising the temperature to 130° C. under a nitrogen atmosphere, and stirring for 0.8 hours Raise the temperature to 170°C, add a solvent, keep warm and reflux for...

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Abstract

The invention discloses a polyester polyol for polyester engineering plastics, which comprises the following raw materials in parts by weight: 80-100 parts of carboxyl compounds, 50-85 parts of polyols, and 1-3 parts of catalysts; The number is 2 to 5. The polyester polyol prepared by the present invention, when added to polyester engineering plastics, can increase the notched impact strength of the obtained material, increase the elongation at break, effectively improve the processing fluidity of the obtained material, and increase the melt index. In addition, the polyester polyol obtained in the present invention can also improve the compatibility and dispersibility of the material with other resin components or fillers, increase the loading capacity, and can be widely used in common polyester engineering plastics.

Description

technical field [0001] The invention relates to the field of polyester polyols, in particular to a polyester polyol for polyester engineering plastics and a preparation method thereof. Background technique [0002] Engineering plastics are plastic products that can be used as engineering materials or replace metal materials. They have excellent comprehensive properties, such as high rigidity, small creep, high mechanical strength, good heat resistance, and good electrical insulation. The fastest growing segment of the plastics industry. Polyester engineering plastics such as PBT are widely used in the fields of automobiles, electronics, and electrical appliances due to their good heat aging resistance, chemical resistance, and insulation. However, it still has problems such as poor notched impact strength, poor flexibility, and poor processing fluidity, which limit its application fields in multiple scenarios. [0003] At present, the modification of polyester engineering ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/199C08G63/137C08G63/16C08G63/181C08G63/78C08G63/85C08K5/523C08K5/526C08L67/02C08L67/00
CPCC08G63/137C08G63/16C08G63/181C08G63/199C08G63/78C08G63/85C08K5/523C08K5/526C08L67/00C08L67/02
Inventor 张乃斌
Owner 安徽星贝达新材料科技有限公司