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Crystallization accelerating agent for crystallization/semi-crystallization polyurethane and preparing method and application thereof

A technology of crystallization accelerator and polyurethane, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc. and crystalline/semi-crystalline polyurethane system, and the inability to make the most effective use of the advantages of crystalline/semi-crystalline polymers, etc., to achieve the effects of wide application range, increasing the number of crystal nuclei, and improving hardness

Active Publication Date: 2016-07-20
传化智联股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] None of the above-mentioned patents mentions the control of crystallization morphology and crystallization speed of crystalline / semi-crystalline polyurethane, which cannot make the most effective use of the advantages of crystalline / semi-crystalline polymers
Although the Chinese patent CN102010583A mentions the use of nano-silica and montmorillonite as crystallization accelerators for high-molecular-weight long-chain branched crystalline polylactic acid materials, it does not mention the impact on crystalline / semi-crystalline polyurethane systems

Method used

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  • Crystallization accelerating agent for crystallization/semi-crystallization polyurethane and preparing method and application thereof
  • Crystallization accelerating agent for crystallization/semi-crystallization polyurethane and preparing method and application thereof
  • Crystallization accelerating agent for crystallization/semi-crystallization polyurethane and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Stir 1 mol of 2000 molecular weight polybutylene adipate diol and 2 mol of TDI under nitrogen protection, and react at a temperature of 90°C for 2.5 hours to obtain compound A; add 2 mol of methyl ethyl ketoxime under nitrogen protection and stir evenly, React at a temperature of 60°C for 3 hours to obtain a crystallization accelerator.

[0026] Application 1: Dehydrate 50g of 500 molecular weight polybutylene adipate diol at 110°C for 1.5h in vacuum, then cool to 65°C, add 39gTDI, under nitrogen protection, stir for 0.5h, add dibutyltin dilaurate 0.015 g, react at 80°C for 2h; add 2.5g DMPA, 1g 1,4-butanediol, 2g neopentyl glycol, 10g butanone, 5g N-methylpyrrolidone, react at 80°C for 3h, and cool to 50°C , To obtain a clear and transparent viscous prepolymer A, mix 5g crystallization promoter and 116g prepolymer A uniformly, add triethylamine with the same molar ratio of dimethylolpropionic acid contained in the prepolymer to neutralize, Disperse in 150 g of deionized ...

Embodiment 2

[0029] Stir 1mol of 2000 molecular weight polyhexanediol adipate diol and 2mol TDI under nitrogen protection, and react at 60℃ for 4h to obtain compound A; add 2mol caprolactam under nitrogen protection and stir evenly. React at 70°C for 2.5 hours to obtain a crystallization accelerator.

[0030] Application 1: Dehydrate 50g of 500 molecular weight polybutylene adipate diol at 110°C for 1.5h in vacuum, then cool to 65°C, add 50gIPDI, under nitrogen protection, stir for 0.5h, add 0.02g stannous octoate, React at 80°C for 2h; add 3g 2-methylpropanediol, 2g 3-methylpentanediol, 10g butanone, 5g N-methylpyrrolidone, 4g sodium ethylenedihydroxyethanesulfonate, and react for 3h at 80°C. Cool down to 50°C to obtain a clear and transparent viscous prepolymer A. Mix 10g of crystallization accelerator and 114g of prepolymer A uniformly, disperse them in 100g of deionized water under high-speed stirring at 800~2000r / min, and add 2g of acetone. After diamine chain extension, stirring for 1 ...

Embodiment 3

[0033] Mix 1 mol of 1000 molecular weight polycarbonate diol and 2 mol of IPDI under nitrogen protection, and react at a temperature of 80°C for 4 hours to obtain compound A; add 2 mol 3,5-dimethylpyrazole under nitrogen protection and stir evenly, React for 1.5h at a temperature of 90°C to obtain a crystallization accelerator.

[0034] Application 1: 150g of 2000 molecular weight polyethylene adipate diol was vacuum dehydrated at 110°C for 1.5h, cooled to 65°C, 40gIPDI, 30gHDI, under nitrogen protection, stirred for 0.5h, added stannous octoate 0.15 g, react at 80°C for 2h; add 6g diethylene glycol, 2g trimethylolpropane, 30g acetone, 4g dimethylolbutyric acid, react for 3h at 70°C, and cool to 50°C, Obtain a clear and transparent viscous prepolymer A, mix 15g crystallization accelerator and 115g prepolymer A uniformly, add triethylamine with the same molar ratio of dimethylolbutyric acid contained in the prepolymer to neutralize it, Disperse in 100g deionized water under high-...

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Abstract

The invention discloses a crystallization accelerating agent for crystallization / semi-crystallization polyurethane and a preparing method and application thereof.In the prior art, control over the crystallization morphology and the crystallization speed of the crystallization / semi-crystallization-type polyurethane does not exist, and the advantage of a crystallization / semi-crystallization polymer can not be most effectively developed.According to the crystallization accelerating agent, polyester diol serves as a structural body, and closed isocyanate serves as a potential reactive functional group.The crystallization accelerating agent is applied to the crystallization / semi-crystallization polyurethane, the crystallization speed can be increased, and the crystallization morphology can be improved; in the use process or the heat existing process, the potential closed isocyanate functional group can be further reacted with polyurethane resin or an active group on a contact base material, and hardness, strength and aging resistance are improved.

Description

Technical field [0001] The invention relates to the field of crystalline / semi-crystalline polyurethane, in particular to a crystallization accelerator for increasing the crystallization speed of crystalline / semi-crystalline polyurethane and adjusting the crystalline form, and a preparation method and application thereof. Background technique [0002] Crystalline / semi-crystalline polyurethane, because it uses polyester polyol with regular structure as raw material, the soft segment of the polyurethane product still has a certain crystallization ability, so it has dense film formation, high cohesive energy, and high strength when used at room temperature. , Good fastness, good water resistance, etc., is a dominant product in polyurethane structural materials. [0003] At present, most of the research on crystalline polyester polyurethane at home and abroad is applied in the field of adhesives, and the research hotspots are mostly concentrated on the utilization of new raw materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/83C08G18/44C08L75/06C09J175/06
CPCC08G18/4238C08G18/44C08G18/833C08L75/06C08L2205/025C08L2205/24C09J175/06
Inventor 余冬梅王小君宁继鑫蒋文佳陈英英
Owner 传化智联股份有限公司
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