Organsilicone modified polyurethane adhesive, preparation method and application of adhesive

A polyurethane adhesive and silicone technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of unstable performance of silicon-modified adhesives and achieve good heat resistance Effect

Inactive Publication Date: 2018-04-24
海口未来技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a silicone-modified polyurethane adhesive, its preparation method and application, so as to solve the problem of unstable performance of the silicon-modified adhesive prepared by the existing preparation method

Method used

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  • Organsilicone modified polyurethane adhesive, preparation method and application of adhesive
  • Organsilicone modified polyurethane adhesive, preparation method and application of adhesive
  • Organsilicone modified polyurethane adhesive, preparation method and application of adhesive

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preparation example Construction

[0027] As described in the background art, the silicon-modified adhesive prepared by the existing preparation method has the problem of unstable performance. In order to solve the above technical problems, the present invention provides a method for preparing a silicone-modified polyurethane adhesive, the preparation method comprising: performing a first prepolymerization reaction on polyether polyol, a first polyisocyanate and a chain extender to obtain an isocyanate Polyurethane-based prepolymer; Polyhydroxysilane coupling agent, second polyisocyanate and polyester polyol are subjected to the second prepolymerization reaction to obtain polyester polyurethane-based silane coupling agent; and isocyanate-based polyurethane prepolymer and poly The ester-type polyurethane-based silane coupling agent undergoes a coupling reaction to obtain a silicone-modified polyurethane adhesive.

[0028] The silicone-modified polyurethane adhesive prepared by the above preparation method can be...

Embodiment 1

[0051] After vacuum dehydration at 110°C, 200g of polyether diol N210 was polymerized with excess IPDI to obtain the first intermediate product, and the reaction time was 2 hours; 200g of the first intermediate product to remove excess IPDI was expanded with 5.4g of ethylenediamine chain reaction until the NCO content reaches the theoretical value by titration analysis to obtain an isocyanate-based polyurethane prepolymer.

[0052] After dehydrating 100g of propyltrimethylolsilane in vacuum at 90°C, cool down to 70°C and slowly add hexamethylene diisocyanate dropwise for coupling reaction to obtain the second intermediate product; add polycapsene to the above second intermediate product Estertriol until (place an appropriate amount of sample in a test tube and heat, the generated isocyanate vapor is directly introduced into anhydrous acetone, and then add a drop of 10% sodium nitrite solution to the acetone, if the sample is isocyanate, the solution will appear orange To reddi...

Embodiment 2

[0055] After vacuum dehydration of 200g polyether diol N210 at 110°C, polymerize with excess IPDI to obtain the first intermediate product, the reaction time is 2h; 200g of the first intermediate product after removing excess IPDI is expanded with 6.8g ethylene glycol chain reaction until the NCO content reaches the theoretical value by titration analysis to obtain an isocyanate-based polyurethane prepolymer.

[0056] After dehydrating 100g of propyltrimethylolsilane in vacuum at 90°C, cool down to 70°C and slowly add hexamethylene diisocyanate dropwise for coupling reaction to obtain the second intermediate product; add polycapsene to the above second intermediate product ester triol until the end of the reaction to obtain a polyester polyurethane-based silane coupling agent.

[0057] Mix 100g of isocyanate-based polyurethane prepolymer and 75g of polyester-based polyurethane-based silane coupling agent evenly, and then conduct a coupling reaction to obtain the final product ...

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Abstract

The invention provides an organsilicone modified polyurethane adhesive, a preparation method and application of the adhesive. The preparation method comprises the following steps: carrying out a firstpre-polymerization reaction on a polyether polyol, a first polyisocyanate and a chain extender to obtain an isocyanate-based polyurethane prepolymer; carrying out a second pre-polymerization reactionon a polyhydroxy silane coupling agent, a second polyisocyanate and a polyester polyol to obtain a polyester-type polyurethane-based silane coupling agent; and carrying out a coupling reaction on theisocyanate-based polyurethane prepolymer with the polyester-type polyurethane-based silane coupling agent to obtain the organsilicone modified polyurethane adhesive. The organsilicone modified polyurethane adhesive prepared by adopting the method has the advantages of stable chemical stability, difficult occurrence of phase separation, and the like. In addition, no water participates in the preparation method, so that the problems that the reaction speed of terminal isocyanate groups with trace water in conventional wet-curing type polyurethane adhesive agent is slow, and the bonding strengthis influenced by bubbles generated by carbon dioxide are solved.

Description

technical field [0001] The invention relates to the field of aerostat manufacturing, in particular to a silicone-modified polyurethane adhesive, its preparation method and application. Background technique [0002] The polyurethane adhesive system has special functions such as wear resistance and low temperature resistance, and has been widely used in the coating of aerostat skin materials, but it has disadvantages such as high temperature resistance, weather resistance and water resistance. Silicon systems have good heat resistance, weather resistance and water resistance. If silicon is introduced into the polyurethane adhesive system, the advantages of the two can be combined and the scope of its application can be greatly broadened. The existing methods for modifying polyurethane adhesives by using silicon elements mainly include: [0003] 1) The silicone / polyurethane system synthesizes interpenetrating network copolymers by semi-gel method, prepolymer method, etc. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/66C08G18/10C08G18/38C08G18/42C08G18/64C08G18/72C08G18/32C09J175/04
CPCC08G18/10C08G18/3893C08G18/4277C08G18/4825C08G18/4854C08G18/64C08G18/6662C08G18/6674C08G18/6685C08G18/72C09J175/04C08G18/3228C08G18/42C08G18/3206
Inventor 不公告发明人
Owner 海口未来技术研究院
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