阅读说明：本技术 一种硬质聚氨酯泡沫材料及其制备方法 (Rigid polyurethane foam material and preparation method thereof ) 是由 邓万学 褚明 于 2018-08-20 设计创作，主要内容包括：本发明公开了一种硬质聚氨酯泡沫材料及其制备方法,属于聚氨酯材料技术领域,由A组分和B组分组成；所述A组分包括以下质量份组分：多亚甲基多苯基多异氰酸酯100份；所述B组分包括以下质量份组分：蔗糖聚醚多元醇90～100份、发泡剂10～25份、扩链剂1～10份、泡沫稳定剂2～6份、交联剂2～10份、催化剂0.5～8份和玻璃纤维8～30份,所述玻璃纤维的直径为0.2～0.4mm,本发明的硬质聚氨酯泡沫材料具有强度高、质量轻、导热低、尺寸稳定性良好、绝热效果好、闭孔率95％以上、隔音效果好、耐磨防腐良好等优点。(The invention discloses a hard polyurethane foam material and a preparation method thereof, belonging to the technical field of polyurethane materials and comprising a component A and a component B; the component A comprises the following components in parts by mass: 100 parts of polymethylene polyphenyl polyisocyanate; the component B comprises the following components in parts by mass: 90-100 parts of sucrose polyether polyol, 10-25 parts of a foaming agent, 1-10 parts of a chain extender, 2-6 parts of a foam stabilizer, 2-10 parts of a cross-linking agent, 0.5-8 parts of a catalyst and 8-30 parts of glass fibers, wherein the diameter of the glass fibers is 0.2-0.4 mm.)

1. A rigid polyurethane foam characterized by: consists of a component A and a component B;

the component A comprises the following components in parts by mass: 100 parts of polymethylene polyphenyl polyisocyanate;

the component B comprises the following components in parts by mass: 90-100 parts of sucrose polyether polyol, 10-25 parts of a foaming agent, 1-10 parts of a chain extender, 2-6 parts of a foam stabilizer, 2-10 parts of a cross-linking agent, 0.5-8 parts of a catalyst and 8-30 parts of glass fibers, wherein the diameter of the glass fibers is 0.2-0.4 mm.

2. A rigid polyurethane foam according to claim 1, characterized in that: the mass fraction of NCO in the polymethylene polyphenyl polyisocyanate is 30-32%.

3. A rigid polyurethane foam according to claim 1, characterized in that: the catalyst is an amine and/or organometallic catalyst.

4. A rigid polyurethane foam according to claim 1, characterized in that: the foaming agent is one of HFC-245fa, n-pentane and isopentane.

5. A rigid polyurethane foam according to claim 1, characterized in that: and the chain extender is one or more than one of ethylene glycol, glycerol, trimethylolpropane and 1, 4-cyclohexanol.

6. A process for preparing a rigid polyurethane foam according to any one of claims 1 to 5, characterized in that: and adding the component A into the component B, and stirring at a high speed to enable the component A to foam freely, wherein the free foaming temperature is 10-50 ℃, and the time is 30-40 min.

Technical Field

The invention belongs to the technical field of polyurethane materials, and particularly relates to a rigid polyurethane foam material and a preparation method thereof.

Background

The rigid polyurethane foam material, polyurethane rigid foam for short, is mostly of a closed-cell structure, has the excellent characteristics of good heat insulation effect, light weight, large specific strength, convenient construction and the like, has the characteristics of sound insulation, shock resistance, electric insulation, heat resistance, cold resistance, solvent resistance and the like, and is widely applied to the fields of heat insulation materials of refrigerator bodies of refrigerators and freezer cases, refrigerator houses, refrigerated trucks and the like, heat insulation materials of buildings, storage tanks, pipelines and the like.

However, the rigid polyurethane foam material in the prior art has unsatisfactory strength, and cannot be applied to the fields of road repair, main structure gap filling support, wood-like furniture and the like.

Disclosure of Invention

The invention provides a hard polyurethane foam material and a preparation method thereof for overcoming the problems in the prior art, and the hard polyurethane foam material has the advantages of high strength, light weight, low heat conduction, good dimensional stability, good heat insulation effect, more than 95% of closed cell rate, good sound insulation effect, good wear resistance and corrosion resistance and the like.

In order to solve the problems in the prior art, the following technical scheme is adopted.

A rigid polyurethane foam characterized by: consists of a component A and a component B;

the component A comprises the following components in parts by mass: 100 parts of polymethylene polyphenyl polyisocyanate;

the component B comprises the following components in parts by mass: 90-100 parts of sucrose polyether polyol, 10-25 parts of a foaming agent, 1-10 parts of a chain extender, 2-6 parts of a foam stabilizer, 2-10 parts of a cross-linking agent, 0.5-8 parts of a catalyst and 8-30 parts of glass fibers, wherein the diameter of the glass fibers is 0.2-0.4 mm.

Further, the mass fraction of NCO of the polymethylene polyphenyl polyisocyanate is 30-32%

Further, the catalyst is an amine and/or organometallic catalyst.

Further, the foaming agent is one of HFC-245fa, n-pentane and isopentane.

Further, the chain extender is one or more of ethylene glycol, glycerol, trimethylolpropane and 1, 4-cyclohexanol.

A preparation method of a hard polyurethane foam material is characterized by comprising the following steps: and adding the component A into the component B, and stirring at a high speed to enable the component A to foam freely, wherein the free foaming temperature is 10-50 ℃, and the time is 30-40 min.

Compared with the prior art, the invention has the following beneficial effects:

the rigid polyurethane foam material disclosed by the invention has the characteristics of high strength, light weight, low heat conduction, good dimensional stability, good heat insulation effect, more than 95% of closed pore rate, good sound insulation effect, good wear resistance and corrosion resistance and the like, and is widely applied to the fields of heat insulation materials, sound insulation materials, sandwich laminated plates, structural materials, aerospace materials, highway repair, main structure gap filling support, wood-like furniture and the like.

Detailed Description

The technical solution of the invention will be clearly and completely described below with reference to the embodiments of the invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.