Non-yellowing polyurethane slurry for hasp, and preparation method thereof

A polyurethane slurry, polyester polyol technology, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problem of non-yellowing special polyurethane slurry, etc. The effect of hardness

Active Publication Date: 2013-10-30
烟台市福山区化学工业研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no real non-yellowing special polyurethane slurry in the domestic buckle industry

Method used

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  • Non-yellowing polyurethane slurry for hasp, and preparation method thereof
  • Non-yellowing polyurethane slurry for hasp, and preparation method thereof
  • Non-yellowing polyurethane slurry for hasp, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A non-yellowing buckle polyurethane slurry, the general molecular formula of the polyurethane slurry is:

[0030]

[0031] In the formula, R is a hydrocarbon group without an aromatic nucleus, which refers to a hydrocarbon group of a polyester polyol and a chain extender (low-carbon diol).

[0032] The specific preparation method is as follows:

[0033] Put the primer solvent composed of 158g of petroleum grade toluene and 79g of N-N dimethylformamide (DMF) into the reactor, then put the molecular weight of 1500 ± 150 polyester polyol 255.7g, polyester grade ethylene glycol 32.6g, 0.89g of trimethylolpropane was put in at one time, stirred evenly, then sealed, heated to 60°C, slowly added 186.4g of H12MDI dropwise, the temperature was controlled at 85°C, dripped in about 3 hours, then heated to 90°C, and kept for 1 hour, add the catalyst, and then react for 90 minutes to measure the viscosity to reach the specified index, and stop the reaction.

[0034] Cool down, ...

Embodiment 2

[0036] A non-yellowing buckle polyurethane slurry, the general molecular formula of the polyurethane slurry is:

[0037]

[0038] In the formula, R is a hydrocarbon group without an aromatic nucleus, which refers to a hydrocarbon group of a polyester polyol and a chain extender (low-carbon diol).

[0039] The specific preparation method is as follows:

[0040] Put the primer solvent composed of 160g of petroleum grade toluene and 81g of N-N dimethylformamide (DMF) into the reactor, then put the molecular weight of 2000 ± 200 polyester polyol 298.3g, polyester grade ethylene glycol 27.1g, Add 0.74g of trimethylolpropane at one time, stir evenly, then seal, heat up to 65°C, slowly add 155.3g of hydrogenated phenylmethane diisocyanate dropwise, control the temperature at 90°C, drop it in about 3 hours, and then heat up to 90°C ℃, keep warm for 1 hour, add the catalyst, and react for another 40 minutes to measure the viscosity to reach the specified index, and stop the reactio...

Embodiment 3

[0043] A non-yellowing buckle polyurethane slurry, the general molecular formula of the polyurethane slurry is:

[0044]

[0045] In the formula, R is a hydrocarbon group without an aromatic nucleus, which refers to a hydrocarbon group of a polyester polyol and a chain extender (low-carbon diol).

[0046] The specific preparation method is as follows:

[0047]Put the primer solvent composed of 160g of petroleum grade toluene and 80g of N-N dimethylformamide (DMF) into the reaction kettle, and then put 116.2g of polyester polyol with a molecular weight of 1500±150 and a polyester polyol with a molecular weight of 2000±200 162.7g of alcohol, 26.6g of polyester grade ethylene glycol, 4.2g of 1.4 butanediol, 0.8g of trimethylolpropane in one time, stir evenly, then seal, heat up to 62°C, slowly add 169.5g of H12MDI dropwise, the temperature Control the temperature at 87°C, drop it in about 3 hours, then raise the temperature to 90°C, keep it warm for 2 hours, add the catalyst,...

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Abstract

The present invention relates to a non-yellowing polyurethane slurry for a hasp, and a preparation method thereof. The molecular general formula is as the follow, wherein R is aromatic nucleus-free alkyl. The concrete process of the preparation method comprises: (1) pouring a bottoming solvent into a reaction kettle, then pouring polyester polyol, terylene-grade ethylene glycol, 1,4-butanediol or 1,3-butanediol, neopentyl glycol and trimethylol propane into the reaction kettle, uniformly stirring, and then sealing and heating; (2) slowly adding hydrogenated phenylmethane diisocyanate to the reaction kettle in a dropwise manner, controlling a temperature to 85-90 DEG C, holding the temperature for 1-2 hours, adding a catalyst, and then carrying out a reaction for 40-90 minutes, cooling, adding a diluting solvent, uniformly stirring, adding acetone when the temperature is decreased to 54 DEG C, uniformly stirring, and taking the material and packaging at the temperature of 35-40 DEG C. The slurry of the present invention has characteristics of simple production process, easy operation and short curing time, and is suitable for long-term use under the ultraviolet illumination environment while the slurry is not yellowing in the use process.

Description

technical field [0001] The invention relates to a polyurethane slurry and a preparation method thereof, in particular to a non-yellowing polyurethane slurry and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] Since the 1970s, polyurethane adhesives have been widely used in various industries for their excellent adhesion, tensile strength, hydrolysis resistance, abrasion resistance and low temperature resistance. However, at present, the polyurethane adhesive used for sizing Velcro textiles used in China is lacking in high temperature, light stability and weather resistance. If the temperature of the gluing process is high, reaching above 140°C, the drying time will be longer, which will cause color difference in the buckle product and affect the appearance. Especially for white or light-colored buckles, it is more revealing. In order to improve the appearance quality, light stability and weather resistance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/42C08G18/32C09J175/06
Inventor 王世鹏王淑荣袁江红王备庆王忠民
Owner 烟台市福山区化学工业研究所有限公司
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