阅读说明：本技术 一种新型聚氨酯菜板材料及其制备方法 (Novel polyurethane chopping board material and preparation method thereof ) 是由 赵冠宇 陈梁 荆晓东 于 2020-08-13 设计创作，主要内容包括：本发明属于化工领域,具体涉及一种新型聚氨酯菜板材料及其制备方法,将A组分制备预聚体,将聚醚多元醇DDL-2000D在100～120℃抽真空脱水1.5～2.0h,降温至45～55℃后加入计量的异氰酸酯,升温至70～80℃反应2～2.5h合成NCO含量为5～15％的预聚体；将预聚体与B组分混合均匀,倒入模具中,模具保持在85±5℃,在5～10MPa压力下反应成型,30min后脱模,然后在80℃下熟化24小时得到成品。用该材料制作的菜板具有具有硬度高,使用寿命长等优点。(The invention belongs to the field of chemical industry, and particularly relates to a novel polyurethane chopping board material and a preparation method thereof, wherein a prepolymer is prepared from a component A, polyether polyol DDL-2000D is subjected to vacuum-pumping dehydration for 1.5-2.0 h at 100-120 ℃, metered isocyanate is added after the temperature is reduced to 45-55 ℃, and the temperature is increased to 70-80 ℃ for reaction for 2-2.5 h to synthesize the prepolymer with the NCO content of 5-15%; and (3) uniformly mixing the prepolymer and the component B, pouring the mixture into a mold, keeping the temperature of the mold at 85 +/-5 ℃, reacting and forming under the pressure of 5-10 MPa, demolding after 30min, and curing for 24 hours at 80 ℃ to obtain a finished product. The chopping board made of the material has the advantages of high hardness, long service life and the like.)

1. a novel polyurethane chopping board material is characterized in that: the composition is prepared from a component A and a component B in parts by weight as follows:

the component A comprises:

30-60 parts of polyether polyol DDL-2000D

20-50 parts of isocyanate

And B component:

2. a novel polyurethane chopping board material according to claim 1, wherein: the polyether polyol DDL-2000D is 2-functionality and 2000-molecular-weight polyether polyol produced by Zibode Federal chemical industry Limited.

3. A novel polyurethane chopping board material according to claim 1, wherein: the isocyanate is MDI-50.

4. A novel polyurethane chopping board material according to claim 1, wherein: the polyether polyol DDL-1000D is 2-functionality polyether polyol with the molecular weight of 1000 produced by Zibode Federal chemical industry Limited.

5. A novel polyurethane chopping board material according to claim 1, wherein: the polyether polyol DEP-330N is polyether polyol with functionality of 3 and molecular weight of 4800, which is produced by Zibode Federal chemical industry Limited.

6. A novel polyurethane chopping board material according to claim 1, wherein: the chain extender is one or more of MOCA, TMP or 1, 4-butanediol.

7. A novel polyurethane chopping board material according to claim 1, wherein: the plasticizer is DOTP.

8. A novel polyurethane chopping board material according to claim 1, wherein: the catalyst is an organic zinc catalyst or an organic bismuth catalyst.

9. A preparation method of a novel polyurethane chopping board material as claimed in any one of claims 1 to 8, characterized by comprising the following steps:

(1) preparing a prepolymer from the component A, vacuumizing and dehydrating polyether polyol DDL-2000D at 100-120 ℃ for 1.5-2.0 h, cooling to 45-55 ℃, adding metered isocyanate, heating to 70-80 ℃, and reacting for 2-2.5 h to synthesize the prepolymer with NCO content of 5-15%;

(2) and (2) uniformly mixing the prepolymer prepared in the step (1) with the component B, pouring the mixture into a mold, keeping the temperature of the mold at 85 +/-5 ℃, carrying out reaction forming under the pressure of 5-10 MPa, demolding after 30min, and curing for 24 hours at 80 ℃ to obtain a finished product.

Technical Field

The invention belongs to the field of chemical industry, and particularly relates to a novel polyurethane chopping board material and a preparation method thereof.

Background

The chopping board is used as an essential tool in a kitchen, plays an important role in three meals a day, and common chopping boards on the market are made of wood, bamboo and plastic, but the hardness of the wood chopping board is insufficient, wood residues are chopped out in the using process, the chopping board is harmful to health when people eat the chopping board, and the plastic chopping board is not high in temperature resistance and can easily deform.

Disclosure of Invention

According to the defects of the prior art, the invention provides a novel polyurethane chopping board material and a preparation method thereof, and the chopping board made of the material has the advantages of high hardness, long service life and the like.

The novel polyurethane chopping board material is prepared from a component A and a component B in parts by weight as follows:

the component A comprises:

30-60 parts of polyether polyol DDL-2000D

20-50 parts of isocyanate

And B component:

furthermore, the polyether polyol DDL-2000D is 2-functionality and 2000-molecular-weight polyether polyol produced by Zibode Federal chemical industry Limited, and products made of the polyether polyol have good elasticity and strength.

Furthermore, the isocyanate is MDI-50 (a mixture of 2, 4-diphenylmethane diisocyanate and 4,4' -diphenylmethane diisocyanate), and has high reaction speed and good mechanical property.

Furthermore, the polyether polyol DDL-1000D is 2-functionality polyether polyol with the molecular weight of 1000 produced by Zibode Federal chemical industry Limited, and products made of the polyether polyol have high strength and good wear resistance.

Furthermore, the polyether polyol DEP-330N is a polyether polyol with functionality of 3 and molecular weight of 4800, which is produced by Zibode Federal chemical industry Limited, and products made of the polyether polyol have the advantages of fast curing and good toughness.

Furthermore, the chain extender is one or more of MOCA (3,3 '-dichloro-4, 4' -diaminodiphenylmethane), TMP (trimethylolpropane) or 1, 4-butanediol, and the chain extender plays a role in chain extension and curing.

Furthermore, the plasticizer is DOTP (dioctyl phthalate), and the effects of reducing viscosity and reducing cost are achieved.

Furthermore, the catalyst is an organic zinc catalyst or an organic bismuth catalyst.

The invention also provides a preparation method of the novel polyurethane chopping board material, which comprises the following steps:

(1) preparing a prepolymer from the component A, vacuumizing and dehydrating polyether polyol DDL-2000D at 100-120 ℃ for 1.5-2.0 h, cooling to 45-55 ℃, adding metered isocyanate, heating to 70-80 ℃, and reacting for 2-2.5 h to synthesize the prepolymer with NCO content of 5-15%;

(2) and (2) uniformly mixing the prepolymer prepared in the step (1) with the component B, pouring the mixture into a mold, keeping the temperature of the mold at 85 +/-5 ℃, carrying out reaction forming under the pressure of 5-10 MPa, demolding after 30min, and curing for 24 hours at 80 ℃ to obtain a finished product.

In summary, the invention has the following advantages:

(1) the polyurethane chopping board material prepared by the method has the advantages of good strength, high hardness, long service life and the like.

(2) The invention also provides a preparation method of the compound, and the preparation method is simple and easy to implement.

Detailed Description

The present invention is further illustrated by the following examples.