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Low-temperature, low-humidity and rapid-curing polyurethane composition and preparation method thereof

A fast-curing, polyurethane technology, applied in the field of polyurethane materials, can solve the problems of complex process, inconvenient construction, high cost, etc., and achieve the effects of wide application, convenient construction, and reduced dependence on moisture

Inactive Publication Date: 2021-02-19
广东盛业化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects or deficiencies such as high cost, complex process and inconvenient construction of the polyurethane glue in the prior art, and provide a polyurethane composition that can be quickly cured at low temperature and low humidity.

Method used

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  • Low-temperature, low-humidity and rapid-curing polyurethane composition and preparation method thereof
  • Low-temperature, low-humidity and rapid-curing polyurethane composition and preparation method thereof
  • Low-temperature, low-humidity and rapid-curing polyurethane composition and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0081] The preparation method of each prepolymer is as follows:

[0082] (1) Preparation of polyurethane prepolymer P1-A

[0083] EO / PO copolyether alcohol SD-40 (hydroxyl value 37mgKOH / g) 200g, diisodecyl phthalate (DIDP) 68.36g at 120°C, 0.95Mpa to remove water in vacuum for 2h, then cool down to 90°C Afterwards, the nitrogen was released to remove the vacuum, and 30.3g of isophorone diisocyanate (IPDI) was added to the reactant and maintained at the temperature. After 2 hours of reaction, 1.34g of dimethylolpropionic acid (DMPA) (dissolved in 20g of acetone in advance) was added dropwise. Middle) continue the reaction and titrate the content of free isocyanate groups until the content reaches 2.01% (theoretical value 1.69%), decompress and evacuate for 30 minutes, and remove acetone to obtain polyurethane prepolymer P1.

[0084] (2) Preparation of polyurethane prepolymer P1-B

[0085] EO / PO copolyether alcohol LM240E (hydroxyl value 28mgKOH / g) 200g, diisodecyl phthalate (...

Embodiment 1～7

[0096] This embodiment provides a series of polyurethane compositions, the formulations of which are shown in Table 1.

[0097] The formula (part) of the polyurethane composition that table 1 embodiment 1~7 provides

[0098]

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Abstract

The invention relates to a low-temperature, low-humidity and rapid-curing polyurethane composition and a preparation method thereof. The polyurethane composition comprises a polyurethane prepolymer P1, a polyurethane prepolymer P2, a polyurethane prepolymer P3, a modified filler, carbon black, a plasticizer, a catalyst and an adhesion promoter. The polyurethane composition provided by the invention can be quickly cured under low-temperature and low-humidity conditions through the matching of the polyurethane prepolymer P1, the modified filler and other components, and has the advantages of wide application and convenience in construction.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and more specifically relates to a low-temperature, low-humidity fast-curing polyurethane composition and a preparation method thereof. Background technique [0002] The curing of polyurethane is mainly that the prepolymer containing isocyanate group reacts with moisture in the presence of a catalyst at a certain temperature and undergoes crosslinking and curing. The influence of temperature and humidity on the curing speed is crucial. Most of the polyurethane adhesives currently on the market will severely weaken their curing speed under low temperature and low humidity conditions in winter, which limits their application in many scenarios. For example, in the windshield assembly line of the main engine factory, the installation process of the windshield glass in the main engine factory is divided into glue application, fixing nail rake, sealant and nail rake removal. Each process has stric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/34C08G18/32C08K9/06C08K3/26C08K3/04C08K5/12C08K3/34C08K13/06
CPCC08G18/6625C08G18/66C08G18/4018C08G18/48C08G18/42C08G18/348C08G18/3855C08K9/06C08K3/26C08K3/04C08K5/12C08K3/346C08K13/06C08K2003/265
Inventor 张志文李桂妃边峰周传军
Owner 广东盛业化学科技有限公司
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