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Migration-resisting plasticizer for polyurethane sealant and polyurethane building sealant

A technology of migration-resistant plasticizer and sealant, applied in the field of sealant, to achieve the effect of good water removal, simple process and long shelf life

Inactive Publication Date: 2019-07-23
广东盛业化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sealants exported to the EU must pass RoHS and REACH certification in many cases. Generally, sealants cannot meet the requirements mainly because they contain DEHP or tin content and solvents exceed the standard.

Method used

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  • Migration-resisting plasticizer for polyurethane sealant and polyurethane building sealant
  • Migration-resisting plasticizer for polyurethane sealant and polyurethane building sealant
  • Migration-resisting plasticizer for polyurethane sealant and polyurethane building sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A kind of anti-migration plasticizer for polyurethane sealant, this anti-migration plasticizer is prepared by comprising the following components by mass percentage:

[0051] Polyoxypropylene diol (4000) 90.1%

[0052] Toluene diisocyanate 7.8%

[0053] Ethanol 2.1%

[0054] The above-mentioned anti-migration plasticizer is prepared by the following method:

[0055] (1) Prepare raw materials according to the above-mentioned components of mass proportioning;

[0056] (2) polyoxypropylene polyol is added in the reactor that stirrer, nitrogen inlet and thermometer are equipped with and fully mixes;

[0057] (3) Rapidly heat up to 115°C and dehydrate under vacuum for 2.5 hours until the water content is less than 200ppm, then cool down to 55°C;

[0058](4) Add the formula equivalent polyisocyanate, and determine the reaction to the theoretical end point by titrating the NCO content at 80°C.

[0059] (5) Add the capping agent equivalent to the formula, and confirm that ...

Embodiment 2

[0062] A kind of anti-migration plasticizer for polyurethane sealant, this anti-migration plasticizer is prepared by comprising the following components by mass percentage:

[0063] Polyoxypropylene diol (3000) 85.8%

[0064] Toluene diisocyanate 10%

[0065] Butanol 4.2%

[0066] The above-mentioned anti-migration plasticizer is prepared by the following method:

[0067] (1) Prepare raw materials according to the above-mentioned components of mass proportioning;

[0068] (2) polyoxypropylene polyol is added in the reactor that stirrer, nitrogen inlet and thermometer are equipped with and fully mixes;

[0069] (3) Rapidly heat up to 110°C and dehydrate under vacuum for 3 hours until the water content is less than 200ppm, then cool down to 55°C;

[0070] (4) Add the formula equivalent polyisocyanate, and determine the reaction to the theoretical end point by titrating the NCO content at 85°C.

[0071] (5) Add an equivalent amount of capping agent to the formula, confirm th...

Embodiment 3

[0074] A kind of anti-migration plasticizer for polyurethane sealant, this anti-migration plasticizer is prepared by comprising the following components by mass percentage:

[0075] Polyoxypropylene diol (2000) 73.9%

[0076] Isophorone Diisocyanate 16.5%

[0077] n-octanol 9.6%

[0078] The above-mentioned anti-migration plasticizer is prepared by the following method:

[0079] (1) Prepare raw materials according to the above-mentioned components of mass proportioning;

[0080] (2) polyoxypropylene polyol is added in the reactor that stirrer, nitrogen inlet and thermometer are equipped with and fully mixes;

[0081] (3) Rapidly heat up to 120°C and dehydrate under vacuum for 2.5 hours until the water content is less than 200ppm, then cool down to 70°C;

[0082] (4) Add the formula equivalent polyisocyanate, and determine the reaction to the theoretical end point by titrating the NCO content at 100°C.

[0083] (5) Add the capping agent equivalent to the formula, and confi...

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Abstract

The invention provides a migration-resisting plasticizer which is prepared from the following ingredients in mass percent: 70 to 92% of polypropylene oxide polyalcohol, 5 to 18% of polyisocyanate and1 to 15% of an end capping agent. The viscosity of the migration-resisting plasticizer is 10000 to 35000 mpa.s under the condition of 25 DEG C. The plasticizer disclosed by the invention has good migration resistance. When the plasticizer is applied to prepare a polyurethane sealant, environment-friendly performance of the polyurethane sealant can meet RoHS and REACH requirements, and the polyurethane sealant can meet the requirement of European Union export for polyurethane building sealant products.

Description

technical field [0001] The invention relates to the technical field of sealants, and more specifically, to a migration-resistant plasticizer for polyurethane sealants and a polyurethane building sealant. Background technique [0002] Polyurethane sealants are widely used in the construction field, and have the characteristics of good flexibility, good bonding and sealing performance, and excellent chemical resistance. Generally, in order to enhance the flexibility of polyurethane sealant, plasticizers need to be added for plasticization, so as to give the sealant a better elastic effect. [0003] At present, the plasticizers commonly used in phthalates have the highest plasticizing efficiency, mainly including butyl phthalate, butyl benzyl phthalate, octyl phthalate, nonyl phthalate and decyl phthalate. Esters etc. On December 12, 2014, the European Chemicals Agency (ECHA) announced that octyl phthalate (DEHP) has become a substance of equal concern because of its endocrin...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/28C09J11/08C09J175/08C09J11/06
CPCC08G18/282C08G18/2825C08G18/4812C08G18/4825C08G18/6666C08L2205/025C08L2205/03C09J11/06C09J11/08C09J175/08C08L75/08C08L77/00C08L27/06C08K5/54
Inventor 詹锋李桂妃黄淑坚张志文张丽
Owner 广东盛业化学科技有限公司
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