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High density polyurethane and raw material composition, combined polyether, preparation method and application thereof

A combination of polyether and polyurethane technology, applied in the field of polyurethane, can solve the problems of complex molding process, low foam strength, high VOC value, etc., and achieve the effect of simple construction process, high chemical stability and good weather resistance

Active Publication Date: 2014-02-12
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 the present invention is to overcome the poor bonding effect between the existing metal reinforcement material and the base material interface, while the glass fiber reinforcement material has many surface defects, the molding process is complicated, and the traditional polyurethane foam has low strength, and the catalyst added Large amount, high VOC value, large odor when used on site, and serious environmental pollution defects. Provide a high-density polyurethane and raw material composition, combined polyether, preparation method and use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Preparation of combined polyether:

[0053]20 parts of polyether polyol 6305C, 40 parts of polyether polyol 8307, 15 parts of polyether polyol DL-1000, 25 parts of polyether polyol 330N, 2 parts of foam stabilizer L-6860, 0.1 part of deionized water, catalyst BiCAT 81180.8 copies.

[0054] Put various raw materials into a stainless steel reaction kettle according to the above formula, and stir for 1 hour under the condition of a rotation speed of 500 rpm at room temperature to prepare a composite polyether.

[0055] (2) Preparation of high-density polyurethane: After mixing the combined polyether and isocyanate PM-200 in Example 1 evenly according to the mass ratio of 1:1.0, spray it on the surface of the extruded ABS board to be reinforced by a high-pressure spraying machine, and the spraying thickness is 2cm. Table 1 shows the performance after being placed at a constant temperature at 25°C±2°C for 24 hours.

[0056] The performance parameter of the high-densit...

Embodiment 2

[0059] (1) Preparation of combined polyether:

[0060] 40 parts of polyether polyol 6305C, 20 parts of polyether polyol 8307, 25 parts of polyether polyol DL-1000, 15 parts of polyether polyol 330N, 2 parts of foam stabilizer L-6860, 0.3 parts of deionized water, catalyst BiCAT 8118 0.6 parts.

[0061] Put various raw materials into a stainless steel reaction kettle according to the above formula, and stir for 1 hour under the condition of a rotation speed of 500 rpm at room temperature to prepare a composite polyether.

[0062] (2) Preparation of high-density polyurethane: After mixing the combined polyether and isocyanate PM-200 in Example 2 at a mass ratio of 1:1.0, spray it onto the PE board to be reinforced by a high-pressure sprayer, with a spray thickness of 2cm. The test performance is shown in Table 2 after being placed at a constant temperature at 25°C±2°C for 24 hours.

[0063] The performance parameter of the high-density polyurethane of table 2 embodiment 2

[...

Embodiment 3

[0067] (1) Preparation of combined polyether:

[0068] 30 parts of polyether polyol 6305C, 30 parts of polyether polyol 8307, 20 parts of polyether polyol DL-1000, 20 parts of polyether polyol 330N, 3 parts of foam stabilizer L-6860, 0.5 parts of deionized water, catalyst BiCAT8118 0.4 parts.

[0069] Put various raw materials into a stainless steel reaction kettle according to the above formula, and stir for 1 hour under the condition of a rotation speed of 500 rpm at room temperature to prepare a composite polyether.

[0070] (2) Preparation of high-density polyurethane: Mix the combined polyether and isocyanate PM-200 in Example 3 evenly at a mass ratio of 1:1.0, and then spray it on the surface of the decorative stone to be reinforced by a high-pressure sprayer, with a spray thickness of 2cm. After being placed at a constant temperature at 25°C±2°C for 24 hours, the test performance is shown in Table 3.

[0071] The performance parameter of the high-density polyurethane ...

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Abstract

The invention discloses a combined polyether, a polyurethane raw material composition, high density polyurethane and application thereof. The combined polyether comprises the following components by weight: 20-40 parts of sorbitol polyether polyol, 20-40 parts of sucrose polyether polyol, 15-25 parts of polyether polyol DL-1000, 15-25 parts of polyether polyol 330N, 2-3 parts of a foam stabilizer, 0.4-0.8 part of an organic bismuth catalyst, and 0.1-0.5 part of water. The sum of sorbitol polyether polyol, sucrose polyether polyol, polyether polyol DL-1000 and polyether polyol 330N is 100. The sorbitol polyether polyol satisfies: a hydroxyl value of 480-520mgKOH / g, a functionality degree of 4.3-4.8, an acid value of less than or equal to 0.15mgKOH / g, and viscosity of 5400-6200mPa.s under 25DEG C; the sucrose polyether polyol satisfies: a hydroxyl value of 330-370mgKOH / g, a functionality degree of 4.0-4.5, an acid value of less than or equal to 0.15mgKOH / g, and viscosity of 2000-4000mPa.s under 25DEG C. The high density polyurethane has high strength and high toughness, is molded by spray coating, needs no mould, is especially suitable for strengthening various materials with curved surfaces. The formed polyurethane strengthening layer is continuous and seamless, and has a good bonding effect with the substrate.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a high-density polyurethane, a raw material composition, a combined polyether, a preparation method and an application. Background technique [0002] At present, as reinforcement materials, they are mainly divided into two types: metal and glass fiber reinforced resin, and the bonding effect between metal reinforcement and substrate interface is poor. However, in the process of glass fiber reinforced resin, sometimes there are pinholes or voids on the molding surface due to poor resin flow, etc., and the molding process is more complicated. [0003] According to the density, rigid polyurethane foam can be divided into ordinary rigid foam and high-density structural rigid foam. High-density rigid foam has the advantages of high strength, good toughness, dense and tough crust, etc. The existing technology is mainly used as imitation wood materials, through molding, to replace wood as v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/76C09D175/08C08L75/08C08G101/00
CPCC08G18/4816C08L75/08C08G2110/0083
Inventor 李心强倪军于楠许凤华
Owner SHANGHAI DONGDA POLYURETHANE
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