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Silane blocking resin containing urethane group and preparation method of silane blocking resin

A urethane-based, silane-terminated technology, used in the field of silane-modified resins, can solve the problems of single molecular weight distribution, reduced mechanical properties, and high resin viscosity

Active Publication Date: 2017-12-08
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a urethane-containing silane-terminated resin and its The preparation method, by selecting the appropriate reaction raw materials and improving the synthesis method, can achieve a single molecular weight distribution of the product resin, while maintaining good mechanical properties, the viscosity is significantly improved

Method used

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  • Silane blocking resin containing urethane group and preparation method of silane blocking resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The preparation process of the silane-terminated polyurethane resin containing carbamate is as follows:

[0095] Add 500g of HOROTHP (62.5mmol) and 7.0g of IPDI (31.8mmol) with a number average molecular weight of 8000 into a 2L three-necked flask, preheat to 60-70°C while stirring, add 0.1g of stannous octoate °C until the NCO content in the system is lower than 0.05%. Then add 500ml of methanol and 0.5g of Amberlyst H-15 solid acid loaded on silica gel, react at 45°C for 2h, filter out the solid acid catalyst, and remove the solvent by heating in vacuo. In the product obtained, add 13.0g 3-isocyanatopropyltrimethoxysilane (62.5mmol), 0.1g stannous octoate catalyst, stir and react to the NCO content in the system below 0.05% at 70 ℃, promptly obtain viscosity 16500cP urethane-containing silane-terminated polyurethane resin.

[0096] The urethane-containing silane-terminated polyurethane resin prepared above was cast into a film with a thickness of 2 mm, and cured for...

Embodiment 2

[0098] The preparation process of the silane-terminated polyurethane resin containing carbamate is as follows:

[0099] Add 500g of HOROTHP (41.7mmol) with a number average molecular weight of 12000 and 4.8g of IPDI (21mmol) into a 2L three-necked flask, preheat it to 60-70°C while stirring, add 0.1g of stannous octoate catalyst, and set the temperature at 70°C React until the NCO content in the system is lower than 0.05%. Then add 500ml of methanol and 0.5g of Amberlyst H-15 solid acid loaded on silica gel, react at 45°C for 2h, filter out the solid acid catalyst, and remove the solvent by heating in vacuo. Add 8.6g 3-isocyanatopropyl trimethoxysilane (42mmol) in the product obtained, 0.05g stannous octoate catalyst, stir and react at 70 ℃ until the NCO content in the system is lower than 0.05%, and the obtained viscosity is 21000cP A urethane-containing silane-terminated polyurethane resin.

[0100] The urethane-containing silane-terminated polyurethane resin prepared abov...

Embodiment 3

[0102] The preparation process of the silane-terminated polyurethane resin containing carbamate is as follows:

[0103] Add 500g of HOROTHP (62.5mmol) and 7.0g of IPDI (31.8mmol) with a number average molecular weight of 8000 into a 2L three-necked flask, preheat to 60-70°C while stirring, add 0.1g of stannous octoate °C until the NCO content in the system is lower than 0.05%. Then add 500ml of methanol and 0.5g of Amberlyst H-15 solid acid loaded on silica gel, react at 45°C for 2h, filter out the solid acid catalyst, and remove the solvent by heating in vacuo. Add 14.0g IPDI (62.5mmol) and 0.1g stannous octoate catalyst to the obtained product, stir and react at 70°C for 3h, then add 16.0g (62.5mmol) anilinopropyltrimethoxysilane to obtain a viscosity of 18000cP A urethane-containing silane-terminated polyurethane resin.

[0104] The urethane-containing silane-terminated polyurethane resin prepared above was cast into a film with a thickness of 2 mm, and cured for 14 days ...

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Abstract

The invention belongs to the technical field of silane modified resin, and provides a silane blocking resin containing a urethane group and a preparation method of the silane blocking resin. The silane blocking resin is prepared from the following reaction raw materials comprising the following components (wherein the using amount of each component is 100% in terms of the total weight of the raw materials): (a) polyisocyanates with the using amount of 0 to 10 wt%; (b) a monohydric polymer, with a tetrahydropyrane ether group, with the using amount of 50 wt% to 99 wt%; and the reaction raw materials of the silane modified resin also comprises component (c) or (d), the component (c) is a silane coupling agent, with an isocyanate group, with the using amount of 0.2 wt% to 20 wt%; the component (d) comprises (d1) polyisocyanates with the using amount of 0.2 wt% to 20 wt%; and (d2) a silane coupling agent, with at least one active hydrogen, with the using amount of 0.2 wt% to 20 wt%. The resin obtained in the invention has a single molecular weight and is relatively narrow in distribution, and the viscosity is obviously improved while a preferable mechanical property is maintained.

Description

technical field [0001] The invention belongs to the technical field of silane-modified resins, and in particular relates to a silane-terminated resin containing carbamate groups and a preparation method thereof. Background technique [0002] Polyurethane has good adhesion to the substrate, and has the advantages of wear resistance, high mechanical strength, and good vibration absorption performance. It also has the characteristics of many composition changes and a wide range of adjustable structure and performance during synthesis. Therefore, polyurethane materials are used in many fields. Adhesives and sealants have a wide range of applications. However, polyurethane sealants have poor heat resistance and are easy to decompose at high temperatures. When used as a one-component moisture-curing adhesive, due to the existence of free isocyanate groups, air bubbles are likely to be generated during the curing process, which affects the bonding performance, and free isocyanate ...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/48C08G18/71C08G18/30
CPCC08G18/289C08G18/48C08G18/718C08G18/755
Inventor 孙军坤于深蒋凤娟张文生
Owner WANHUA CHEM GRP CO LTD
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