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Radiation-curable benzophenone-terminated polyurethane resin and application thereof

A technology of polyurethane resin and benzophenone, applied in the field of new polymer materials, can solve the problems of high odor, excessive coating curing and high VOC

Pending Publication Date: 2021-07-06
SHENZHEN LIHE BOHUI PHOTOSENSITIVE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technical approach also has some obvious negative results: (1) Excessive initiator in the formula will cause excessive curing inside the coating and affect the performance of the product; (2) Due to the strong ultraviolet absorption capacity of the initiator, excessive The initiator causes the ultraviolet light intensity to attenuate sharply in the coating, which significantly reduces the curable thickness of the coating; (3) After curing, there are a large number of by-products of photoinitiator decomposition in the coating, resulting in strong odor and high VOC.

Method used

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  • Radiation-curable benzophenone-terminated polyurethane resin and application thereof
  • Radiation-curable benzophenone-terminated polyurethane resin and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 2

[0056] The synthesis of embodiment 1 benzophenone-terminated polyurethane oligomer / polymer

[0057] To a 3-liter round bottom flask, add 62.5 g of diphenylmethane 4,4'-diisocyanate (MDI) and 0.4 g of dibutyltin dilaurate, 11.5 g of 4-(2-hydroxyepoxy) diisocyanate Benzophenone, mixture with 0.01 g p-methoxyphenol. After heating to 80° C. under moderate stirring, a mixed solution of 600 g of toluene and 878 g of hydrogenated polybutadiene-type bifunctional polyol (L-2203, Kraton Polymer) was slowly added. After the addition was complete, it was further heated to 100° C. and kept stirring at this temperature for 3 hours until the level of isocyanate (NCO) was below 0.1%. The molecular weight and polydispersity of the benzophenone-terminated polyurethane polymers of this example were determined by conventional gel permeation chromatography (GPC) methods. It has a number average molecular weight of 34000 and a polydispersity of 2.95.

[0058] The sample of this example is coated...

Embodiment 2

[0059] The synthesis of embodiment 2 acrylic acid terminated polyurethane oligomers / polymers

[0060] To a 3-liter round-bottom flask, add 62.5 g of diphenylmethane 4,4'-diisocyanate (MDI) and 0.8 g of dibutyltin dilaurate, 5.8 g of 2-hydroxyethyl acrylate, and 0.1 g p-Methoxyphenol mixture. After heating to 80° C. under moderate stirring, a mixed solution of 600 g of toluene and 878 g of hydrogenated polybutadiene-type bifunctional polyol (L-2203, Kraton Polymer) was slowly added. After the addition was complete, it was further heated to 90° C. and kept stirring at this temperature for 3 hours until the level of isocyanate (NCO) was below 0.1%. Lower the temperature to 80 °C, then weigh 5 g of TPO (photoinitiator) into a 3 L round bottom flask, and continue stirring at this temperature for 1 hour. The molecular weight and polydispersity of the acrylic-terminated polyurethane polymers of this example were determined by conventional gel permeation chromatography (GPC) methods...

Embodiment 3

[0062] Example 3 Preparation of solvent-based pressure-sensitive adhesive based on benzophenone-terminated polyurethane polymer

[0063] To a 3-liter round bottom flask, add 62.5 g of diphenylmethane 4,4'-diisocyanate (MDI) and 0.4 g of dibutyltin dilaurate, 11.5 g of 4-(2-hydroxyepoxy)benzidine Ketone, mixture with 0.01 g p-methoxyphenol. After heating to 80° C. under moderate stirring, a mixed solution of 600 g of toluene and 878 g of hydrogenated polybutadiene-type bifunctional polyol (L-2203, Kraton Polymer) was slowly added. After the addition was complete, it was further heated to 100° C. and kept stirring at this temperature for 3 hours until the level of isocyanate (NCO) was below 0.1%. Lower the temperature to 80°C, then weigh (solid tackifier resin), (liquid tackifying resin), 40g HDODA (1,6-hexanediol diacrylate), and 1gTPO (photoinitiator) into a 3L round bottom flask, and continue stirring at this temperature for 1 hour.

[0064] The sample of this embodimen...

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Abstract

The invention discloses a radiation-curable benzophenone-terminated polyurethane resin and an application thereof, aims to provide a novel benzophenone-terminated polyurethane resin, and mainly overcomes the defects of poor thermal stability and difficult surface curing of the existing unsaturated group-terminated polyurethane resin. The radiation-curable benzophenone-terminated polyurethane resin is a reaction product of components (I), (II) and (III): at least one polyisocyanate (I); at least one polyol compound (II) containing at least two polyol compounds capable of reacting with isocyanate groups; and (III) at least one compound containing a benzophenone capable of reacting with an isocyanate group. The invention belongs to the technical field of novel polymer materials.

Description

technical field [0001] The invention belongs to the technical field of new polymer materials, and in particular relates to a radiation-curable benzophenone-terminated polyurethane resin and an application thereof. Background technique [0002] Radiation-curable polyurethane resins are increasingly used to replace traditional bonding materials because they are energy-efficient and environmentally friendly, improve production efficiency, reduce material consumption, reduce factory floor space, and prevent emission of volatile organic compounds (VOC). Polyurethane resins with unsaturated terminal groups are currently the most commonly used radiation-curable materials. For example, U.S. Patent No. 5,578,693 discloses a radiation-curable polyfunctional unsaturated terminal polyurethane oligomer, which is the reaction product of a terminally unsaturated isocyanate-containing polyurethane oligomer and an alkoxylated polyol . These unsaturated group-terminated polyurethane resins ...

Claims

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Application Information

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IPC IPC(8): C08G18/62C08G18/28C08G18/67C09J4/06C09J4/02C09J11/08
CPCC08G18/6208C08G18/2845C08G18/672C09J4/06C09J11/08C08G18/62
Inventor 卢新亚戴莹琨
Owner SHENZHEN LIHE BOHUI PHOTOSENSITIVE MATERIAL CO LTD
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