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Polyester polyol as well as preparation method and application

A polyester polyol and polyol technology, applied in the field of polyurethane materials, can solve the problems of long synthesis steps, product flexibility, low temperature resistance and mechanical properties, and increase the difficulty of synthesis process control, so as to improve hardness and synthesis Simple method, convenient and efficient synthetic route

Active Publication Date: 2020-01-24
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As the amount of reactive diluent monomer increases, although the curing rate of the system increases, the flexibility, low temperature resistance and mechanical properties of the product deteriorate, which is not conducive to the advantages of polyurethane acrylic acid; Synthesis and acrylate monomer end-capping two-step reaction to synthesize photocurable resin, the synthesis steps are longer, which increases the difficulty of synthesis process control

Method used

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  • Polyester polyol as well as preparation method and application
  • Polyester polyol as well as preparation method and application
  • Polyester polyol as well as preparation method and application

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Embodiment 1-12

[0052] A kind of preparation method of polyester polyol, the raw material that adopts and proportioning reference table 1;

[0053] The overall preparation process is: in a 5L stainless steel reaction kettle equipped with heating jacket, stirring, nitrogen stripping, rectification tower, vacuum gauge, and alcohol recovery tank, according to Table 1, components A, B, C and polymerization inhibition agent. Heat up to 145°C to melt and start the reaction. As the reaction progresses, the by-product water is continuously separated from the system, and the reaction stage lasts for 1 hour. Subsequently, the temperature was further raised to 250° C. for 3 hours. After 1 hour of heat preservation at 250°C, the reaction water gradually slowed down. At this time, tetra-n-butyl titanate was added, and the vacuum degree was increased to 0.09MPa within 1 hour to continue the reaction. The reaction stops when the value reaches the set value. Cool down to 150°C, discharge and pack. The ob...

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Abstract

The invention discloses polyester polyol as well as a preparation method and application. The polyester polyol is prepared from the following components in parts by mass through a condensation polymerization reaction: A) 100 parts of dibasic acid or derivatives thereof; B) 50-500 parts of polyol containing a double bond; and C) 0-200 parts of small molecule dibasic alcohol without a double bond. The preparation method for the polyester polyol is used for preparing through a conventional condensation polymerization reaction. The invention further provides application of the polyester polyol topreparation of photocurable polyurethane resin. The polyester polyol disclosed by the invention has the technical advantages that the polyester polyol has relatively high content of double bond; and all performance of the photocurable polyurethane resin can be improved and the dosage of active monomer acrylates can be reduced or acrylates are not added into a resin system in a resin preparation process, so that the influences on the performance of the resin, caused by the acrylates, are reduced.

Description

technical field [0001] The invention relates to a polyester polyol, in particular to a polyester polyol, a preparation method and application, and belongs to the technical field of polyurethane materials. Background technique [0002] Urethane acrylate is an important class of photocurable cross-linked polyurethane resin. It is based on polyurethane, and the end of the molecular chain introduces double bonds through acrylation. bond crosslinking reaction. Its molecular structure mainly includes a urethane segment, a polyol main chain, and an acrylate hydroxyalkyl ester segment, and the curing characteristics are determined by the acrylate located in the segment. Urethane acrylates combine the advantages of both acrylic and polyurethane resins. [0003] The polymerizable double bonds of urethane acrylate oligomers are generally located at the end of the molecular chain. In order to increase the double bond content of photocurable urethane acrylate, improve the curing rate a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/52C08G18/68
CPCC08G63/52C08G18/68
Inventor 孙令民张存玉黄岐善
Owner WANHUA CHEM GRP CO LTD
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