Preparation method of UV-cured organic silicon modified hyperbranched polyurethane material

A hyperbranched polyurethane, silicone technology, applied in the direction of polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc. Change and other problems, to achieve the effect of simple production, excellent bonding performance, easy industrialization

Active Publication Date: 2020-07-10
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that a photoinitiator needs to be added when the existing UV-curable polyurethane is cured, the cost is high, and the low-molecular-weight photoinitiator is easy to cause yellowing and deterioration of mechanical properties. The preparation method of the chemical polyurethane material not only obtains an optically transparent material, but also has the flexibility, mechanical properties, and excellent adhesion properties of the polyurethane material, and can give full play to the temperature resistance, weather resistance, and ultraviolet resistance of silicone. Radiation, water repellency and other advantages

Method used

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  • Preparation method of UV-cured organic silicon modified hyperbranched polyurethane material
  • Preparation method of UV-cured organic silicon modified hyperbranched polyurethane material
  • Preparation method of UV-cured organic silicon modified hyperbranched polyurethane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Under nitrogen protection, first mix 100g polytetramethylene ether glycol with an average molecular weight of 2000, 30g HO(Me 2 SiO) 100 Add H and 1.34g trimethylolpropane into a 250mL three-necked flask equipped with a mechanical stirrer and a thermometer. After stirring evenly, start reducing the pressure and heating to 110°C / 130mmHg to remove water for 2 hours, then cool down to 40°C, and add dropwise 0.10g of dibutyltin dilaurate, add 21.65g of IPDI dropwise, react at 40°C for 6h, add 8.45g of hydroxypropyl methacrylate, continue to react at 40°C for 8h, and obtain 161.44g of acrylate-terminated hyperbranched organosilicon modification permanent polyurethane;

[0040] (2) Under mechanical stirring at 50°C, add 78.54g 3-mercaptopropyltrimethoxysilane, 48.75g dimethyldiethoxysilane, 47.98g methyltrimethoxysilane, 1.62g hexamethyldisiloxane Add dropwise the mixture of 56.2g deionized water and 3.5g 36.5% concentrated hydrochloric acid in the mixture of alkane (ac...

Embodiment 2-14

[0043] According to the preparation method of Example 1, different molar ratios of acrylate group and mercaptopropyl group were selected, and after UV curing, the properties of the obtained cured product are shown in Table 1.

Embodiment 15

[0053] (1) Under nitrogen protection, first mix 100g polytetramethylene glycol with an average molecular weight of 500, 30g polytetramethylene ether glycol with an average molecular weight of 1000, 40g

[0054] HO(Me 2 SiO) 400 (MePhSiO) 400 (CH 2 CH 2 CH 2 CF 3 MeSiO) 200 Add H and 4.0g trimethylolpropane into a 250mL three-necked flask equipped with a mechanical stirrer and a thermometer. After stirring evenly, start to decompress and heat up to 130°C / 130mmHg to remove water for 0.5h, then cool down to 90°C, drop Add 0.20g dibutyltin dilaurate, add dropwise a mixture of 18gIPDI and 11gTDI, react at 90°C for 1h, add 16.9g-4-hydroxybutyl methacrylate, continue to react at 90°C for 2h, and obtain 220.1g acrylate sealant terminal hyperbranched silicone-modified polyurethane.

[0055] (2) Under mechanical stirring at 40°C, add 39.27g 3-mercaptopropyltrimethoxysilane, 64.34g dimethyldiethoxysilane, 32.83g methyltrimethoxysilane, 1.62g hexamethyldisiloxane Add dropwise a m...

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Abstract

The invention relates to the technical field of organic silicon. In order to solve the problem of high cost due to the fact that a photoinitiator needs to be added in curing of existing UV-cured polyurethane and the problem that yellowing and degradation of mechanical properties are easily caused by the low-molecular-weight photoinitiator, the invention provides a preparation method of a UV-curedorganic silicon modified hyperbranched polyurethane material. The method comprises the following steps: reacting isocyanate-terminated hyperbranched organic silicon modified polyurethane with hydroxylacrylate to obtain organic silicon modified polyurethane containing acrylate groups, uniformly mixing the organic silicon modified polyurethane containing acrylate groups with polysiloxane containingmercaptopropyl groups, carrying out vacuum defoaming for 10-30 minutes, and carrying out UV curing for 10-120 seconds. The optical transparent material not only has the flexibility and mechanical properties of a polyurethane material and the excellent adhesive property with a base material, but also can give full play to the advantages of temperature resistance, weather resistance, ultraviolet radiation resistance, hydrophobicity and the like of organic silicon.

Description

technical field [0001] The invention relates to the technical field of organosilicon, in particular to a method for preparing an optically transparent UV-cured organosilicon-modified hyperbranched polyurethane material. Background technique [0002] Polyurethane material is one of the fastest-growing polymer materials. It has the characteristics of wear resistance, tear resistance, and good flex resistance. It can be made into various products with different properties and has a wide range of uses. The structure of polyurethane is composed of soft segments and hard segments in the form of blocks, grafts or interpenetrating networks. The soft segment is usually polyether or polyester, which endows polyurethane with flexibility and toughness, and the hard segment is usually a polycondensation product of diisocyanate and small molecule diol or diamine, which endows polyurethane with strength and rigidity. By adjusting the ratio of soft and hard segments and the structure of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/40C08G18/48C08G18/61C08G18/65C08G18/66C09D11/102C09D175/14C09J175/14
CPCC08G18/672C08G18/4009C08G18/61C08G18/4854C08G18/4825C08G18/4833C08G18/4837C08G18/4808C08G18/6677C08G18/6517C09D175/14C09J175/14C09D11/102C08G18/40
Inventor 杨雄发刘江玲程飞焦晓皎华西林
Owner HANGZHOU NORMAL UNIVERSITY
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