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 int

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

Examples

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Example

[0041] Specific embodiment 1: This embodiment is a cellulose-reinforced polyurethane / epoxy resin interpenetrating network rigid composite foam material. 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 is composed of 8 parts to 12 parts of polyether polyol, 10 parts to 16 parts of isocyanate, 0.05 parts to 0.25 parts of water, and 2 parts by weight. ~3.5 parts of foaming agent, 0.05 parts to 0.2 parts of foam stabilizer, 0.04 parts to 0.15 parts of initiator, 0.1 parts to 5 parts of 1% by mass nano-cellulose fiber hydrosol, 0.05 parts to 0.4 parts of chain extension It is prepared from 0.05 to 0.4 parts of cross-linking agent and 0.1 to 8 parts of epoxy resin;

[0043] The hydrosol of nanocellulose fibers with a mass percentage of 1% is specifically prepared accordi...

Example Embodiment

[0053] Embodiment 2: The difference between this embodiment and Embodiment 1 is: the polyether polyol is one or a mixture of polyether polyol 4110 and polyether polyol 330; The isocyanate is one or a mixture of diphenylmethane diisocyanate and polymethyl polyphenyl isocyanate; the foam leveling agent is silicone oil; the initiator is triethylenediamine and dilauric acid One of dibutyltin, stannous octoate, potassium oleate and potassium octoate or a mixture of two of them; the water is deionized water. Others are the same as the first embodiment.

Example Embodiment

[0054] Specific embodiment three: The difference between this embodiment and specific embodiment one or two is that the blowing agent is a physical blowing agent. Others are the same as 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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