Surface-modified and fiber-reinforced polyurethane composite material and preparation method thereof

A technology of surface modification and fiber reinforcement, which is applied in the field of polyurethane materials, can solve the problems of not fully meeting the requirements of use, affecting the effect of fiber reinforcement, and easy agglomeration of fibers, etc., to achieve improved interface bonding, good performance, and high mechanical strength. Effect

Active Publication Date: 2019-02-15
VESACH FURNITURE & DECORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although rigid polyurethane foam has a certain strength, it cannot fully meet the requirements of use in many occasions. Therefore, it is necessary to improve its mechanical properties
Among them, fiber reinforcement is one of the more effective ways at present, but the combination of untreated fiber and polyurethane is only a simple mechanical combination, the interface is poorly combined, the compatibility is poor, and it is easy to be pulled out on the fractured surface of polyurethane, and Untreated fibers are easy to agglomerate and unevenly distributed in polyurethane materials, thus affecting the fiber reinforcement effect

Method used

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  • Surface-modified and fiber-reinforced polyurethane composite material and preparation method thereof
  • Surface-modified and fiber-reinforced polyurethane composite material and preparation method thereof
  • Surface-modified and fiber-reinforced polyurethane composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The surface-modified fiber-reinforced polyurethane composite material of this embodiment includes the following components in parts by weight: 100 parts of composite polyether polyol, 1.0 parts of silicone oil, 1.2 parts of catalyst, 1 part of coupling agent, 8 parts of composite foaming agent, 5 parts of fuel, 30 parts of isocyanate and 18 parts of surface modified palm fiber.

[0031] Wherein, the preparation method of the surface-modified palm fiber is as follows: after alkali treatment of the palm fiber with lye for 1 hour, heat treatment at 80° C. for 30 minutes; In the aluminate coupling agent, after reacting for 1 h, dry to obtain the surface-modified palm fiber; the components of the lye are shown in Tables 1-2 respectively.

[0032] Table 1

[0033]

[0034] Table 2

[0035]

[0036] The composite polyether polyol comprises polyether polyol 1 and polyether polyol 2, the hydroxyl value of polyether polyol 1 is 150mgKOH / g, the hydroxyl value of polyether ...

Embodiment 2

[0046] The surface-modified fiber-reinforced polyurethane composite material of this embodiment includes the following components in parts by weight: 100 parts of composite polyether polyol, 0.8 parts of silicone oil, 1.2 parts of catalyst, 2.4 parts of coupling agent, 10 parts of composite foaming agent, 5 parts of fuel, 30 parts of isocyanate and 16 parts of surface modified palm fiber.

[0047] Wherein, the preparation method of the surface-modified palm fiber is as follows: after alkali treatment of the palm fiber with lye, heat treatment at 80° C. for 25 minutes; In the aluminate coupling agent, after reacting for 1h, dry to obtain the surface modified palm fiber; the concentration of NaOH in the lye is 6wt%, and NaOH 2 The concentration of S is 0.5wt%, Na 2 S 2 o 4 The concentration is 1.0wt%.

[0048] The composite polyether polyol comprises polyether polyol 1 and polyether polyol 2, the hydroxyl value of polyether polyol 1 is 200mgKOH / g, the hydroxyl value of polye...

Embodiment 3

[0056] The surface-modified fiber-reinforced polyurethane composite material of this embodiment includes the following components in parts by weight: 100 parts of composite polyether polyol, 1.4 parts of silicone oil, 0.9 parts of catalyst, 1.8 parts of coupling agent, 12 parts of composite foaming agent, 6 parts of fuel, 28 parts of isocyanate and 20 parts of surface modified palm fiber.

[0057] Wherein, the preparation method of the surface-modified palm fiber is as follows: after alkali treatment of the palm fiber with lye, heat treatment at 80° C. for 25 minutes; In the aluminate coupling agent, after reacting for 1h, dry to obtain the surface modified palm fiber; the concentration of NaOH in the lye is 6wt%, and NaOH 2 The concentration of S is 0.5wt%, Na 2 S 2 o 4 The concentration is 1.0wt%.

[0058] The composite polyether polyol comprises polyether polyol 1 and polyether polyol 2, the hydroxyl value of polyether polyol 1 is 180mgKOH / g, the hydroxyl value of polye...

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Abstract

The invention discloses a surface-modified and fiber-reinforced polyurethane composite material and a preparation method thereof. The composite material comprises the following components in parts byweight: 100 parts of compound polyether polyol, 0.3-1.5 parts of silicone oil, 0.8-1.4 parts of a catalyst, 1-3 parts of a coupling agent, 6.7-12.5 parts of a compound foaming agent, 4-9 parts of a fire retardant, 27-36 parts of isocyanate, and 12-20 parts of surface modifying palm fibers. According to the surface-modified and fiber-reinforced polyurethane composite material, the surface modifyingpalm fibers are used for preparing the fiber-reinforced polyurethane composite material; the palm fibers are high in elasticity, high in toughness, and high in breaking tenacity, so that the strengthof the polyurethane composite material is improved; the palm fibers are subjected to surface modification, so that the boundary combination condition of the fibers and a material substrate can be improved. The surface-modified and fiber-reinforced polyurethane composite material are relatively high in mechanical strength and high in fireproof and flame retarding performances.

Description

technical field [0001] The invention relates to the technical field of polyurethane materials, in particular to a surface-modified fiber-reinforced polyurethane composite material and a preparation method thereof. Background technique [0002] Polyurethane material is a kind of polymer with repeated -NHCOO- groups on the main chain obtained by the reaction of polyol and polyisocyanate. It is a synthetic material between rubber and plastic. Among them, rigid polyurethane foam is a material that does not undergo obvious deformation under a certain load, and cannot return to the original state after deformation due to excessive load. Rigid polyurethane foam is usually obtained by compounding polyol, isocyanate and various additives. It has low thermal conductivity, low density, certain strength and hardness, and can effectively improve its resistance after being treated with additives. Flammability, water resistance and corrosion resistance, widely used in furniture field. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L97/02C08J9/14C08J5/06C08G18/48C08H8/00
CPCC08G18/4804C08H8/00C08J5/06C08J9/141C08J9/142C08J2375/08C08J2497/02
Inventor 黄茂强黄茂荣余洪涛林耀裕王艾陈晖霓
Owner VESACH FURNITURE & DECORATION
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