UV viscosity-reducing adhesive and preparation method thereof

A viscose, pentylene glycol copolyester technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem of low peel strength, high peel strength, inability to fix and easily pick up and other problems, to achieve the effect of fast reaction rate, improvement of the brittleness of the rubber layer, and high conversion rate

Active Publication Date: 2021-11-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing viscosifying adhesives often use acrylate as the main body and are compounded with multifunctional monomers and photoinitiators. Low peel strength before irradiation and high peel strength after UV irradiation, unable to achieve effective fixation and easy pick-up

Method used

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  • UV viscosity-reducing adhesive and preparation method thereof
  • UV viscosity-reducing adhesive and preparation method thereof
  • UV viscosity-reducing adhesive and preparation method thereof

Examples

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preparation example Construction

[0030] The present invention provides a kind of preparation method of UV viscosifying adhesive, comprising the following steps:

[0031] S1 Weigh fumaryl chloride and pentylene glycol monomers and dissolve them in solvent A, add triethylamine and pass through nitrogen to react at 25-35°C for 3-5 hours, after the reaction is completed, take the liquid phase after centrifugation, add n-hexane for precipitation Obtain hydroxyl-terminated fumaryl chloride-pentanediol copolyester;

[0032] S2 Weigh the hydroxyl-terminated fumaryl chloride-pentanediol copolyester, isophorone diisocyanate monomer, catalyst and solvent B in a container, feed nitrogen gas at 60-80°C for 3-5 hours, and then add The chain agent is reacted at 60-80°C for 2-3 hours, and after the reaction is completed, a photoinitiator is added and stirred to obtain a UV viscose-reducing adhesive.

[0033] In a specific embodiment, in step S1, solvent A is, for example, one or more of tetrahydrofuran, toluene, and dichlor...

Embodiment 1

[0046] A kind of UV viscosity-reducing adhesive, the preparation method is as follows:

[0047] (1) Preparation of hydroxyl-terminated fumaryl chloride-pentanediol copolyester

[0048] Weigh 47g (0.45mol) of pentanediol and 71g of triethylamine, dissolve them in 210g of tetrahydrofuran, stir and slowly add 54g (0.35mol) of fumaryl chloride dropwise. After the dropwise addition, the condensation polymerization reaction was carried out at 30° C. for 3 h under the protection of nitrogen, and then the reaction mixture was cooled to room temperature, and the solution phase was collected by centrifugation. Add 260g of n-hexane to the solution phase to precipitate and filter, then wash the precipitate with 100g deionized and 100g ethanol in sequence, and dry the washed precipitate in a vacuum oven at 50°C for 12h to obtain terminal hydroxyl fumaryl chloride - Pentylene glycol copolyester. The obtained hydroxyl-terminated fumaryl chloride-pentanediol copolyester had a hydroxyl value...

Embodiment 2

[0052] A kind of UV viscosity-reducing adhesive, the preparation method is as follows:

[0053] (1) Preparation of hydroxyl-terminated fumaryl chloride-pentanediol copolyester

[0054] Weigh 45g (0.43mol) of pentanediol and 75g of triethylamine, dissolve in 215g of tetrahydrofuran, stir and slowly add 55g (0.36mol) of fumaryl chloride dropwise. After the dropwise addition, the condensation polymerization reaction was carried out at 30° C. for 3 h under the protection of nitrogen, and then the reaction mixture was cooled to room temperature, and the solution phase was collected by centrifugation. Add 260g of n-hexane to the solution phase to precipitate and filter, then wash the precipitate with 100g deionized and 100g ethanol in sequence, and dry the washed precipitate in a vacuum oven at 50°C for 12h to obtain terminal hydroxyl fumaryl chloride - Pentylene glycol copolyester. The obtained hydroxyl-terminated fumaryl chloride-pentanediol copolyester had a hydroxyl value of 5...

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Abstract

The invention provides a UV viscosity-reducing adhesive and a preparation method thereof. The UV viscosity-reducing adhesive comprises hydroxyl-terminated fumaryl chloride-pentanediol copolyester, isophorone diisocyanate, a chain extender, a photoinitiator and a catalyst. The hydroxyl-terminated fumaryl chloride-pentanediol copolyester is introduced into the UV viscosity-reducing glue, so that the brittleness of a glue layer is improved, and residual glue and degumming are not generated after UV viscosity loss; meanwhile, the main chain of the hydroxyl-terminated fumaryl chloride-pentanediol copolyester has higher double bond density, so that the UV viscosity-reducing adhesive can have higher crosslinking density without adding polyfunctional monomers, the 180-degree peel strength can be as low as 0.4 N / 25mm after ultraviolet irradiation, and the UV viscosity-reducing adhesive is easy to peel; secondly, due to the fact that a multifunctional monomer does not need to be added, the peel strength of the UV viscosity-reducing glue before ultraviolet irradiation is not damaged, the 180-degree peel strength before ultraviolet irradiation can reach 19 N / 25 mm, and the adhesion performance is excellent; finally, the polyurethane type UV viscosity-reducing adhesive can be prepared through the reaction within 1-3 minutes under ultraviolet radiation, so that the reaction rate is high, and the conversion rate is high.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a UV viscosifying adhesive and a preparation method thereof. Background technique [0002] UV viscous reducing adhesive is a new type of adhesive material, which has super high adhesion, which can ensure that the pasted object remains stable, does not fall off, does not flash during processing, and has no effect on the unprocessed part. to the protective effect. After processing, the adhesion force can be instantly reduced by ultraviolet radiation, and it can be easily removed from the adhered material without affecting the performance of the processed object. [0003] Therefore, UV adhesive is widely used in the cutting and etching of semiconductor wafers. Protective effects. After the processing is completed, the wafer slice is completely peeled off from the fixed adhesive film by ultraviolet light irradiation, without affecting the wafer. [0004] Existing viscosifying a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C08G18/75C08G18/68C08G18/32C08G18/10
CPCC09J175/14C08G18/755C08G18/68C08G18/10C08G18/3206
Inventor 徐卫兵武星周正发任凤梅马海红
Owner HEFEI UNIV OF TECH
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