A kind of polyurethane self-skinning foam and preparation method thereof
A self-skinning and polyurethane technology, applied in the field of polymer materials, can solve the problems of poor performance of polyurethane self-skinning foam and the pollution of foaming agents, and achieve the effect of improving the appearance and physical properties of the foam, improving the performance, and improving the thickness of the skin.
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Embodiment 1
[0044] The present embodiment provides a kind of polyurethane self-skinning foam, and its preparation method is as follows:
[0045] (1) Weigh PO / EO copolyether polyols, polymer polyols, crosslinking agents, surfactants, water, blowing agents, amine catalysts, organometallic catalysts and colorants according to the mass in the table below , mix, stir evenly, then adjust the temperature of the raw material to 22°C, weigh the MDI isocyanate according to the mass in the following table, preheat to 22°C, add it to the above mixture, stir evenly to obtain the mixture.
[0046] (2) Pour the mixture prepared in step (1) into a metal mold with a temperature of 30°C, control the overfill coefficient to 70%, close the mold and lock it with a clamp, mature for 3 minutes, open the mold, and machine the skin of the product Piercing, trimming, that is.
[0047]
[0048]
Embodiment 2
[0050] The present embodiment provides a kind of polyurethane self-skinning foam, and its preparation method is as follows:
[0051] (1) Weigh PO / EO copolyether polyol, crosslinking agent, surfactant, water, foaming agent, amine catalyst, organometallic catalyst and color paste according to the quality in the table below, mix and stir evenly , and then adjust the temperature of the raw material to 22°C, weigh the MDI isocyanate according to the mass in the following table, preheat it to 22°C, add it to the above mixture, and stir evenly to obtain the mixture.
[0052] (2) Pour the mixture prepared in step (1) into a metal mold with a temperature of 30°C, control the overfill coefficient to 70%, close the mold and lock it with a clamp, mature for 3 minutes, open the mold, and machine the skin of the product Piercing, trimming, that is.
[0053]
Embodiment 3
[0055] The present embodiment provides a kind of polyurethane self-skinning foam, and its preparation method is as follows:
[0056] (1) Weigh PO / EO copolyether polyols, polymer polyols, crosslinking agents, surfactants, foaming agents, amine catalysts, organometallic catalysts and colorants according to the quality in the table below, and mix , stir evenly, then adjust the temperature of the raw material to 22°C, weigh the MDI isocyanate according to the mass in the following table, preheat it to 22°C, add it to the above mixture, and stir evenly to obtain the mixture.
[0057] (2) Pour the mixture prepared in step (1) into a metal mold with a temperature of 30°C, control the overfill coefficient to 20%, close the mold and lock it with a clamp, mature for 3 minutes, open the mold, and machine the skin of the product Piercing, trimming, that is.
[0058]
[0059]
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Abstract
Description
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