Combined polyether, polyurethane raw material composition, wood-like material and preparation methods thereof

A technology of raw material composition and combined polyether, which is applied in the field of combined polyether and polyurethane raw material composition, can solve the problems of low surface hardness, uneven foaming, affecting the appearance of products, etc., and achieve high production efficiency and short demoulding time , the effect of low production cost

Active Publication Date: 2017-02-22
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 by this invention is to overcome the polyurethane imitation wood material of the prior art compared with the imitation wood product that adopts HCFC-141b foaming agent to make, under the situation of equal density, surface hardness is lower, and through When adding solid fillers to improve surface hardness, manual foaming can only be used, resulting in uneven foaming and large cavities on the surface, which seriously affect the appearance of the product. A combination of polyether and polyurethane raw materials is provided. Imitation wood material and preparation method

Method used

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  • Combined polyether, polyurethane raw material composition, wood-like material and preparation methods thereof
  • Combined polyether, polyurethane raw material composition, wood-like material and preparation methods thereof

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Embodiment 1

[0040] Table 1

[0041]

[0042] The dosage of each component of the combined polyether in this embodiment is shown in Table 1. The combined polyether can be prepared according to conventional methods in the field. Generally, the above-mentioned components are stirred at room temperature according to their parts by weight and mixed uniformly.

[0043] The preparation method of polyurethane imitation wood material is made up of following steps:

[0044] Control 1 part of combined polyether and 1 part of polymethylene polyphenyl polyisocyanate PM200 at a material temperature of 20±1°C, mix at a speed of 3000r / min and stir well, then pour into a mold with a constant temperature of 30-35°C, and mature Open the mold after 8 minutes, and you get it.

Embodiment 2

[0046] The dosage of each component of the combined polyether in this embodiment is shown in Table 1. The combined polyether can be prepared according to conventional methods in the field. Generally, the above-mentioned components are stirred at room temperature according to their parts by weight and mixed uniformly.

[0047] The preparation method of polyurethane imitation wood material is made up of following steps:

[0048] Control 1 part of combined polyether and 1 part of 44V20 at a material temperature of 20±1°C, mix at a speed of 3000r / min and stir well, pour it into a mold with a constant temperature of 30-35°C, and open the mold after aging for 10 minutes.

Embodiment 3

[0050] The dosage of each component of the combined polyether in this embodiment is shown in Table 1. The combined polyether can be prepared according to conventional methods in the field. Generally, the above-mentioned components are stirred at room temperature according to their parts by weight and mixed uniformly.

[0051] The preparation method of polyurethane imitation wood material is made up of following steps:

[0052] Control 1 part of combined polyether and 1.05 parts of M20S at a material temperature of 20±1°C, mix at a speed of 3000r / min and fully stir evenly, pour into a mold with a constant temperature of 30-35°C, and open the mold after aging for 12 minutes.

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Abstract

The invention discloses a combined polyether, a polyurethane raw material composition, a wood-like material and preparation methods thereof. The combined polyether comprises the following components in parts by weight: 100 parts of polyether glycol, 1.5-2.5 parts of foam stabilizer, 0.8-1.7 parts of catalyst, 1.0-1.7 parts of water and 3-8 parts of crosslinking agent. The polyether glycol comprises polyether glycol A with the viscosity of 2500-4100 mPa.s, polyether glycol B with the viscosity of 2000-2800 mPa.s and polyether glycol C with the hydroxyl value of 163-173 mg KOH/g. When the density of the wood-like material is 175-224 kg/m<3>, the surface hardness reaches Shore D46-53, the compression strength is 4.5-5.8 MPa, and the bending strength is 11.0-12.3. The wood-like material has the advantages of high production efficiency and short stripping time, and can implement stripping for a common mold within 8-12 minutes. The wood-like material is foamed completely in water, and thus, is friendly to the environment and low in production cost.

Description

technical field [0001] The invention relates to a composite polyether, a polyurethane raw material composition, a wood-like material and a preparation method. 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 industry, chemical industry, textile, medical treatment, electronics, construction, automobile, aerospace And many other fields, known as the "fifth largest plastic". [0003] Since the 1990s, polyurethane was applied to my country's furniture industry, and around 2005, it began to be widely promoted. Polyurethane furniture is lighter than wood, and its strength and surface hardness are higher than wood, and it can be foamed through molds. Shaped to make a variety of complex and delicate patterns, saving the labor of wood carving and processing. The cost of polyurethane furniture is also lower than that of solid wood, and its a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G101/00
CPCC08G18/4804C08G18/4883C08G18/6674C08G18/6688C08G2110/0066C08G2110/0083
Inventor 贾雪芹于楠信延垒许其恒夏连波
Owner SHANGHAI DONGDA POLYURETHANE
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