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Premixed polyether polyol, polyurethane raw material composition and polyurethane foam for polyurethane imitated wood product and preparation method of polyurethane foam

A technology of polyurethane foam and raw material composition, applied in the field of polyurethane, can solve the problems of inability to bend, poor toughness, etc., and achieve the effects of strong stereoscopic effect and simple installation

Active Publication Date: 2018-05-11
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in this application is to provide a combination of polyether and polyurethane raw materials in order to overcome the shortcomings of conventional polyurethane (PU) foam products, wooden products, and gypsum products that have poor toughness and cannot be bent. Material, polyurethane foam and preparation method thereof

Method used

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  • Premixed polyether polyol, polyurethane raw material composition and polyurethane foam for polyurethane imitated wood product and preparation method of polyurethane foam
  • Premixed polyether polyol, polyurethane raw material composition and polyurethane foam for polyurethane imitated wood product and preparation method of polyurethane foam

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preparation example Construction

[0064] The present application also provides a method for preparing polyurethane foam for polyurethane imitation wood products, which includes the following steps: uniformly mixing the components of the above-mentioned combined polyether for electric water heaters; adding isocyanate and mixing uniformly; Foaming to obtain polyurethane foam, wherein the mass ratio of combined polyether and isocyanate is 1:1.0-1:1.1, more preferably 1:1.05-1:1.1.

[0065] In some embodiments, the components of the combined polyether are mixed homogeneously in a mixing vessel with a safety device. Wherein, the mixing container with safety device is a mixing tank, and in some embodiments, the mixing tank is a stainless steel mixing tank.

[0066] In some embodiments, the mixing time of the components of the combined polyether is 0.5-1 hour, more preferably 0.6-0.8 hour.

[0067] In some embodiments, the mixture of combined polyether and isocyanate is foamed using a high pressure foaming machine. ...

Embodiment 1

[0088] Table 1 shows the raw material composition and isocyanate ratio of the combined polyether in this embodiment.

[0089] 50 parts of polyether polyol YD-8669, 45 parts of polyether polyol NJ-8220, 5 parts of polyether polyol YNW-551C, 2 parts of foam stabilizer AK-8818, 1.4 parts of catalyst Dabco BX405, 0.7 parts of catalyst TMR -35, and 0.7 deionized water were added to the stainless steel mixing kettle and mixed evenly for 45 minutes, and stirred evenly.

[0090] Add 110.0 parts of isocyanate PM200 to the above combined polyether, after mixing evenly, pour it into a mold at 22°C for foaming, and obtain polyurethane foam soft imitation wood lines.

Embodiment 2

[0092] Table 1 shows the raw material composition and isocyanate ratio of the combined polyether in this embodiment.

[0093]55 parts of polyether polyol YD-8669, 35 parts of polyether polyol NJ-8220, 10 parts of polyether polyol YNW-551C, 2.5 parts of foam stabilizer AK-8818, 1.0 parts of catalyst Dabco BX405, 0.6 parts of catalyst TMR -35, and 0.6 deionized water were added to the stainless steel mixing kettle and mixed evenly for 45 minutes, and stirred evenly.

[0094] Add 113.1 parts of isocyanate PM200 to the above combined polyether, after mixing evenly, pour it into a mold at 22°C for foaming, and obtain polyurethane foam soft imitation wood lines.

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Abstract

The invention relates to premixed polyether polyol, polyurethane raw material composition and polyurethane foam for a polyurethane imitated wood product and a preparation method of the polyurethane foam. The premixed polyether polyol is prepared from components in parts by weight as follows: 50-60 parts of first polyether polyol, 35-45 parts of second polyether polyol, 5-10 parts of third polyether polyol, 2-3 parts of a foam stabilizer, 1.5-2.5 parts of a catalyst and 0.5-0.7 parts of a foaming agent, wherein viscosity of first polyether polyol is 3200 plus or minus 500 mPa.s and hydroxyl value is 425-455 mgKOH / g when first polyether polyol is at 25 DEG C; viscosity of second polyether polyol is 1500 plus or minus 500 mPa.s and hydroxyl value is 400-460 mgKOH / g when second polyether polyol is at 25 DEG C; viscosity of third polyether polyol is 500 plus or minus 100 mPa.s and hydroxyl value is 54.5-57.5 mgKOH / g when third polyether polyol is at 25 DEG C. The polyurethane imitated woodproduct prepared from premixed polyether polyol has the advantages of being high in toughness, bendable and suitable for dome, arc-shaped furniture / wall decoration and the like.

Description

technical field [0001] The present application relates to the technical field of polyurethane, in particular to a composite polyether for polyurethane imitation wood products, a polyurethane raw material composition, polyurethane foam and a preparation method thereof. Background technique [0002] Polyurethane is a high-performance polymer material with good oil resistance, toughness, wear resistance, aging resistance and adhesion. Its products involve light work, chemical industry, textile, medical treatment, electronics, construction, automobile, aerospace, etc. In many fields, it is known as the "fifth largest plastic". [0003] Beginning in the 1990s, polyurethane was applied to my country's home improvement and furniture industries, and around 2005, it began to be widely promoted. Polyurethane imitation wood products are lighter in weight than wood, and their strength and surface hardness are higher than wood. The mold is foamed to form various complex and delicate patt...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08J9/08C08G101/00
CPCC08G18/4804C08G18/7664C08G2110/0025C08G2110/0066C08G2110/0083
Inventor 李明徐军信延垒于楠李翔
Owner SHANGHAI DONGDA POLYURETHANE
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