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Cellulose-reinforced polyurethane/epoxy resin interpenetrating polymer network hard composite foam material and preparation method thereof

A technology of epoxy resin and interpenetrating network, which is applied in the field of foam materials and its preparation, can solve the problems of poor sound absorption performance and low mechanical properties, and achieve the effect of good sound absorption effect and improved compressive strength

Inactive Publication Date: 2016-02-24
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of poor sound absorption performance and low mechanical properties of the existing polyurethane and epoxy resin interpenetrating polymers, and provides a cellulose-reinforced polyurethane / epoxy resin interpenetrating network rigid Composite foam material and preparation method thereof

Method used

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  • Cellulose-reinforced polyurethane/epoxy resin interpenetrating polymer network hard composite foam material and preparation method thereof
  • Cellulose-reinforced polyurethane/epoxy resin interpenetrating polymer network hard composite foam material and preparation method thereof
  • Cellulose-reinforced polyurethane/epoxy resin interpenetrating polymer network hard composite foam material and preparation method thereof

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specific Embodiment approach 1

[0041] Specific embodiment 1: This embodiment is a cellulose-reinforced polyurethane / epoxy resin interpenetrating network rigid composite foam material, and the sound absorption performance of the cellulose-reinforced polyurethane / epoxy resin interpenetrating network rigid composite foam material is 80 %~92%;

[0042] The cellulose-reinforced polyurethane / epoxy resin interpenetrating network rigid composite foam material consists of 8 to 12 parts of polyether polyol, 10 to 16 parts of isocyanate, 0.05 to 0.25 parts of water, 2 parts by weight ~3.5 parts of foaming agent, 0.05 part~0.2 part of foam stabilizer, 0.04 part~0.15 part of initiator, 0.1 part~5 part of hydrosol of nanocellulose fiber with a mass percentage of 1%, 0.05 part~0.4 part of chain extension agent, 0.05-0.4 parts of cross-linking agent and 0.1-8 parts of epoxy resin;

[0043] Described mass percent is that the hydrosol of the nanocellulose fiber of 1% is specifically prepared according to the following steps...

specific Embodiment approach 2

[0053] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the polyether polyol is a mixture of one or two of polyether polyol 4110 and polyether polyol 330; The isocyanate is a mixture of one or two of diphenylmethane diisocyanate and polymethyl polyphenylisocyanate; the foam stabilizer is silicone oil; the initiator is triethylenediamine, dilauric acid One or a mixture of two of dibutyltin, stannous octoate, potassium oleate and potassium octoate; the water is deionized water. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0054] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the foaming agent is a physical foaming agent. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a cellulose-reinforced polyurethane / epoxy resin interpenetrating polymer network hard composite foam material and a preparation method thereof, relates to a foam material and a preparation method thereof and aims at solving the problems that existing polymer formed through mutual interpenetrating of two types of polymer, namely polyurethane and epoxy resin, is poor in sound absorption property and low in mechanical property. The sound absorption property of the composite foam material ranges from 80% to 92%, and the composite foam material is prepared from polyether polyol, isocyanate, water, a foaming agent, foam stabilizer, initiator, hydrosol of nano-crystalline cellulose with the mass percentage being 1%, chain extender, a cross-linking agent and epoxy resin. The preparation method comprises the steps of firstly, mixing the polyether polyol, the foam stabilizer, the initiator, the foaming agent, the chain extender and the water with cellulose obtained after pretreatment, then adding the epoxy resin and the cross-linking agent, and obtaining a mixture; then mixing the isocyanate with the mixture, conducting stirring till bubbles are generated, leaving the mixture standing still, obtaining a foamed mixture, finally, conducting curing on the foamed mixture at the room temperature, and then conducting curing at the high temperature.

Description

technical field [0001] The invention relates to a foam material and a preparation method thereof. Background technique [0002] Among polyurethane foam products, rigid polyurethane foam has been widely used in thermal insulation industry, packaging industry, shipbuilding industry and other fields due to its excellent mechanical properties, acoustic properties, electrical properties, and chemical resistance properties. Although rigid polyurethane foam has a certain strength, it cannot fully meet the engineering requirements in some occasions, so people have done a lot of research on the enhancement of rigid polyurethane foam. Usually, the methods of strengthening rigid polyurethane foam include fiber reinforcement, particle reinforcement, and interpenetrating network polymer reinforcement. Fiber reinforcement can easily cause air bubbles in the product and foam instability during post-processing; particle reinforcement can easily cause the viscosity of the foaming system to ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/58C08G18/64C08G18/32C08J9/14
CPCC08G18/6674C08G18/3206C08G18/3281C08G18/4045C08G18/4081C08G18/4804C08G18/6484C08G18/6688C08J9/145C08J2375/08
Inventor 李长玉刘守新樊星
Owner NORTHEAST FORESTRY UNIVERSITY
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