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Polyurethane semi-rigid foam composition and preparation method thereof

A semi-rigid, composite technology, applied in the field of polyurethane materials, can solve the problems of environmental damage, high VOC content, poor sound absorption effect, etc., achieve excellent low-frequency sound absorption effect, excellent elongation, and solve the effect of VOC pollution problems

Active Publication Date: 2013-02-27
上海井上高分子制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Market demand requires semi-rigid foam to have good sound-absorbing effect, but the existing semi-rigid foam generally has poor sound-absorbing effect at low frequencies, and the VOC content is too high, which will cause harm to the environment and human body, so there is a strong demand for low-frequency sound absorption. Products with good sound absorption and low VOC

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Accurately weigh the following raw materials: propylene oxide ethylene oxide copolyether 330N 10 kg, propylene oxide ethylene oxide copolyether GEP-303 40 kg, low-functionality polyether polyol ED-28 20 kg, ethylene glycol 9 kg, water 4 kg, catalyst N, N-dimethylcyclohexylamine 1 kg, surfactant 1.5 kg, cell opener 1.0 kg, LDPE plastic powder 10 kg, crosslinking agent glycerin 2 kg, black paste 1.5 kg .

[0024] In the first step, the above raw materials are mixed uniformly according to the proportion to form material A; the modified MDI isocyanate is material B; the weight ratio of material A and material B is 100:120;

[0025] In the second step, control the temperature of material A and material B at 20°C, stir and mix in the mixing tank according to the proportion for 30 seconds, control the stirring speed at 1500 r / min, pour it into the mold, open the mold after 50 minutes and take it out to get Blister.

Embodiment 2

[0027] Accurately weigh the following raw materials: propylene oxide ethylene oxide copolyether 4701 20 kg, propylene oxide ethylene oxide copolyether GEP-303 30 kg, low-functionality polyether polyol ED-28 10 kg, polyol propane Triol 12 kg, water 6 kg, dimethylethanolamine 1 kg, surfactant 1.5 kg, cell opener 1.0 kg, HDPE plastic powder 15 kg, diethanolamine 3 kg, black paste 0.5 kg.

[0028] In the first step, the above raw materials are mixed uniformly according to the proportion to form material A; the modified MDI isocyanate is material B; the weight ratio of material A and material B is 100:130;

[0029] In the second step, control the temperature of material A and material B at 24°C, stir and mix in the mixing tank according to the proportion for 25 seconds, control the stirring speed at 1800 r / min, pour it into the mold, open the mold after 40 minutes and take it out to get Blister.

Embodiment 3

[0031] Accurately weigh the following raw materials: propylene oxide ethylene oxide copolyether 330N 30 kg, propylene oxide ethylene oxide copolyether 26.5 kg, low-functionality polyether polyol 5 kg, polyol 6 kg, water 7 kg, Pentamethyldiethylenetriamine 1 kg, surfactant 0.5 kg, cell opener 1.0 kg, PP plastic powder 15 kg, triethanolamine 6 kg, color paste 2 kg.

[0032] In the first step, the above raw materials are mixed uniformly according to the proportion to form material A; the modified MDI isocyanate is material B; the weight ratio of material A and material B is 100:140;

[0033] In the second step, control the temperature of material A and material B at 26°C, stir and mix in the mixing tank according to the proportion for 20 seconds, control the stirring speed at 2000 r / min, pour it into the mold, open the mold after 35 minutes and take it out to get Blister.

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Abstract

The invention provides a polyurethane semi-rigid foam composition which is formed by the following components in parts by weight: 100 parts of premixed polyether A and 120-170 parts of isocyanate B. The invention also provides a preparation method of the polyurethane semi-rigid foam composition. The polyurethane semi-rigid foam composition provided by the invention has excellent sound absorption effect and low VOC (Volatile Organic Compounds) content and is especially suitable for automobile roofs.

Description

technical field [0001] The invention relates to the field of polyurethane materials, in particular to a polyurethane semi-rigid foam composition. Background technique [0002] Semi-rigid foam (referred to as semi-rigid foam) is a kind of foam whose hardness is between soft foam and hard foam. It is characterized by low density and high compressive strength. This excellent energy absorption function makes it especially suitable for various energy-absorbing materials. Therefore, semi-rigid polyurethane is widely used in the automotive industry, such as automotive dashboards, Roof lining, door trim panels, etc. Market demand requires semi-rigid foam to have good sound-absorbing effect, but the existing semi-rigid foam generally has poor sound-absorbing effect at low frequencies, and the VOC content is too high, which will cause harm to the environment and human body, so there is a strong demand for low-frequency sound absorption. Products with good sound absorption and low VO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G65/28C08G101/00
Inventor 陈玲霞吕佳男夏青青袁冲
Owner 上海井上高分子制品有限公司
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