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Odor-free and low-TVOC polyurethane sealant for automotive trims, and preparation method and application thereof

A polyurethane sealant and automotive interior technology, applied in the field of sealant, can solve problems such as failure to meet the requirements of enterprise standards, achieve low cost, improve the preparation process, and eliminate odors

Active Publication Date: 2017-05-31
GUANGDONG PUSTAR SEALED RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if no organic solvent is used, the polyurethane sealant obtained by the prior art preparation process will still produce a certain odor in a long-term high-temperature closed environment, which cannot meet the requirements of enterprise standards

Method used

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  • Odor-free and low-TVOC polyurethane sealant for automotive trims, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Example 1 Preparation of polyurethane sealant 1

[0042] Add 380g polyurethane prepolymer, add 326g pre-treated calcium carbonate, 50g carbon black, 210g polyurea and 20g white carbon black, 5g hindered amine light stabilizer and 5g hindered phenolic antioxidant in planetary stirred tank, in Stir evenly in a vacuum state, release the vacuum with dry nitrogen, and add 8 g of organic bismuth curing accelerator obtained by vacuum distillation in advance, 8 g of γ-(2,3-glycidyloxy)propyltrimethoxysilane, toluene Sulfonyl isocyanate 8g, heat up to 80°C, depressurize and evacuate, use dry nitrogen to release the vacuum, repeat the steps of depressurization and evacuation, dry nitrogen to release the vacuum three times, cool down to 50°C, vacuum to remove air bubbles, and fill in a sealed container container, get a polyurethane sealant.

[0043] Wherein, the preparation method of described polyurethane prepolymer is:

[0044] Add 245g polyether diol GE-220 (relative molecular...

Embodiment 2

[0047] Embodiment 2 Preparation of polyurethane sealant 2

[0048] Add 380g of polyurethane prepolymer, 250g of pretreated calcium carbonate, 50g of carbon black, and 300g of polyurea into the planetary stirring tank, stir evenly under vacuum, release the vacuum with dry nitrogen, and add 20g of pre-decompression distillation in sequence The obtained organic bismuth curing accelerator, 20g γ-(2,3-glycidyloxypropoxy)propyltrimethoxysilane, 20g toluenesulfonyl isocyanate, heated up to 75°C, decompressed and evacuated, released the vacuum with dry nitrogen, repeated decompression The steps of vacuum evacuation and dry nitrogen release are carried out 4 times, the temperature is lowered to 50°C, the air bubbles are removed by vacuum, and the polyurethane sealant is obtained by filling it in a closed container.

[0049] Wherein, the preparation method of described polyurethane prepolymer is:

[0050] Add 245g polyether diol GE-220 (relative molecular weight 2000), 585g polyether t...

Embodiment 3

[0053] Example 3 Preparation of Polyurethane Sealant 3

[0054] Add 380g of polyurethane prepolymer, 600g of pre-treated calcium carbonate, 200g of carbon black, and 200g of white carbon black into the planetary stirring tank, stir evenly in a vacuum state, release the vacuum with dry nitrogen, and add pre-decompression distillation in sequence The obtained 10g of organic bismuth curing accelerator, 15g of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, and 10g of toluenesulfonyl isocyanate were heated up to 85°C, decompressed and evacuated, and the vacuum was released with dry nitrogen, and repeated The step of decompressing and evacuating, drying nitrogen to release the vacuum is performed 5 times, the temperature is lowered to 50°C, the air bubbles are removed by vacuum, and the polyurethane sealant is obtained by filling it in a closed container.

[0055] Wherein, the preparation method of described polyurethane prepolymer is:

[0056] In a dry 2L three-necked flask, add 245g...

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Abstract

The invention relates to an odor-free and low-TVOC polyurethane sealant for automotive trims, and a preparation method and an application thereof. The polyurethane sealant is prepared from the following components in mass percents: 20-40% of polyurethane prepolymer, 15-40% of environmentally friendly plasticizer, 5-25% of carbon black, 25-60% of white reinforcing filler, 0.2-2% of curing accelerator, 0.2-2% of dehydration stabilizer, 0.2-2% of deodorant, 0-2% of adhesion promoter, 0-30% of thixotropic agent, 0-2% of light stabilizer and 0-2% of antioxidant. Compared with the traditional polyurethane sealant, the polyurethane sealant provided by the invention emits no odor when being used in a long-term closed high temperature (80 DEG C) environment, and the odor rating is 1 level, so the polyurethane sealant has the advantages of being odor-free, low in TVOC and harmless to human body and environment, satisfies the air quality evaluation guidance requirements of passenger cars, and is suitable for sealing and joint filling of automotive trims.

Description

technical field [0001] The invention relates to the field of sealant, in particular to an odorless and low TVOC polyurethane sealant for automobile interior decoration and its preparation method and application. Background technique [0002] With the rapid development of society and the improvement of people's living standards, automobiles have become the preferred means of transportation for people to travel, and when the vehicle is driving and parking, the interior is usually a closed environment. In a closed environment, when the car body is exposed to direct sunlight, the temperature inside the vehicle will rise rapidly. If the odor emitted by the vehicle interior materials is not effectively controlled within the comfortable range of the human sense of smell, it will greatly affect the occupants' health. comfort and endanger human health. At present, most of the materials traditionally used in automotive interior parts have low odor at room temperature and are not easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/06C08G18/48C08G18/32C09K3/10
CPCC08G18/12C08G18/3893C08G18/4812C08G18/6666C08K2201/003C08K2201/011C08L2205/02C09J11/04C09J11/06C09J175/08C09K3/1021C08L75/02C08K13/06C08K9/00C08K3/04C08K3/36C08K2003/265
Inventor 郭盟张志文何玉蝶陈秋连
Owner GUANGDONG PUSTAR SEALED RAYON CO LTD
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