Novel environment-friendly non-foaming polyurethane resin material for handicrafts and preparation method of novel environment-friendly non-foaming polyurethane resin material

Abstract

The invention belongs to a novel environment-friendly non-foaming polyurethane resin material for handicrafts. The novel environment-friendly non-foaming polyurethane resin material comprises the following raw material components in parts by weight: 50-60 parts of polyether polyol, 10-15 parts of micromolecular polyol, 1-2 parts of methyl ethyl ketone, 15-30 parts of aliphatic diisocyanate, 1-2 parts of a water-based chain extender, 6-8 parts of a hydrophilic agent, 2-4 parts of a cross-linking agent, 5-6 parts of a catalyst and 5-7 parts of a salt-forming agent. The preparation method comprises the following steps: (1) uniformly mixing polyether polyol, micromolecular polyol, methyl ethyl ketone and aliphatic diisocyanate to form a basic resin solution; (2) adding a water-based chain extender, a hydrophilic agent, a cross-linking agent, a catalyst and a salt-forming agent into the basic resin solution, and uniformly stirring; and (3) heating the mixed solution to 80-90 DEG C, and carrying out polymerization reaction to form the polyurethane resin material. The preparation method is simple, environmentally friendly, free of peculiar smell, capable of meeting the environmental protection requirement, free of the foaming phenomenon, smooth in appearance and higher in temperature stability, mechanical performance and chemical stability.

Description

Technical Field

[0001] The present invention belongs to polyurethane resin materials, particularly an environmentally friendly non-foaming new polyurethane resin material for handicrafts and its preparation method. Background Art

[0002] Epoxy resin is a thermosetting resin material with excellent properties and has unique properties compared with other thermosetting resins (such as unsaturated resins, etc.), and is widely used in various fields of civil and industrial applications. Traditional epoxy resin materials are prone to foaming during the preparation process, which affects the appearance and performance of the products. At the same time, some resin materials also have problems such as poor environmental performance and complex preparation processes. Therefore, it is of great practical significance to develop a new type of polyurethane resin material that is environmentally friendly, non-foaming, and has a simple preparation process. Summary of the Invention

[0003] The purpose of the present invention is to provide an environmentally friendly non-foaming new polyurethane resin material for handicrafts. The preparation method of the present invention is simple, easy to operate, environmentally friendly and odorless, meeting environmental protection requirements, without foaming during the preparation process, having a flat appearance, and having higher temperature stability, mechanical properties, and chemical stability, and having a wide range of application fields.

[0004] The purpose of the present invention is to provide a preparation method of an environmentally friendly non-foaming new polyurethane resin material for handicrafts.

[0005] The purpose of the present invention is achieved as follows: For the environmentally friendly non-foaming new polyurethane resin material for handicrafts, the raw material components and their weight ratio content are: polyether polyol 50 - 60, small molecule polyol 10 - 15, methyl ethyl ketone 1 - 2, aliphatic diisocyanate 15 - 30, water-based chain extender 1 - 2, hydrophilic agent 6 - 8, crosslinking agent 2 - 4, catalyst 5 - 6, salt-forming agent 5 - 7.

[0006] Among them, the weight ratio of each raw material is polyether polyol 53 - 58, small molecule polyol 11 - 14, methyl ethyl ketone 1.5 - 2, aliphatic diisocyanate 18 - 28, water-based chain extender 1.5 - 2, hydrophilic agent 7 - 8, crosslinking agent 3 - 4, catalyst 5.5 - 6, salt-forming agent 5.5 - 7.

[0007] Among them, the weight ratio of each raw material is: polyether polyol 55, small molecule polyol 12, methyl ethyl ketone 1.8, aliphatic diisocyanate 23, water-based chain extender 1.8, hydrophilic agent 7.5, crosslinking agent 3.5, catalyst 5.8, salt-forming agent 6.5.

[0008] The water-based chain extender is polyester diol or epoxy polyester.

[0009] The hydrophilic agent is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI).

[0010] The crosslinking agent is polycarbodiimide. Polycarbodiimide crosslinking agent: The crosslinking agent contains carbodiimide groups (-N=C=N-), which can react with functional groups such as carboxyl groups (-COOH) in the polyurethane resin to achieve crosslinking.

[0011] The catalyst is dimethylcyclohexylamine. The catalyst is dimethylcyclohexylamine (DMCHA).

[0012] The salt-forming agent is triethylamine. The chemical formula of triethylamine is C6H15N, and it can react with acidic groups in the polyurethane resin to form triethylamine salts.

[0013] The preparation method of the environmentally friendly non-foaming new polyurethane resin material for handicrafts has the following steps: ① Mix polyether polyol, small molecule polyol, methyl ethyl ketone and aliphatic diisocyanate evenly to form a basic resin solution; ② Add a water-based chain extender, a hydrophilic agent, a crosslinking agent, a catalyst and a salt-forming agent to the basic resin solution and stir evenly; ③ Heat the mixed solution to 80-90°C for a polymerization reaction until a uniform polyurethane resin material is formed.

[0014] Compared with traditional epoxy resin materials, the polyurethane resin material has higher temperature stability, mechanical properties, chemical stability and a wider application field. The following is a detailed elaboration of its advantages: Excellent temperature stability: Polyurethane resin materials, such as polyimide, can be used in high-temperature environments up to 400°C, significantly expanding the temperature range of material use.

[0015] This high-temperature stability gives the polyurethane resin material significant advantages in applications in high-temperature environments, such as aircraft engines and spacecraft structural components in the aerospace field.

[0016] 1. Excellent mechanical properties: The polyurethane resin material has higher strength and stiffness and can be used in applications that require high mechanical stability. Its mechanical properties do not change significantly within a wide temperature range, maintaining good stability and reliability. 2. Good chemical stability: The polyurethane resin material has good resistance to most organic solvents, acids and bases, showing good chemical corrosion resistance. This chemical stability enables the material to maintain its performance in harsh environments and extends its service life.

[0017] 3. Wide application fields: Due to the high performance and special properties of the polyurethane resin material, it is widely used in many fields such as aerospace, automotive industry, electronic equipment, and medical. In these fields, the polyurethane resin material replaces traditional materials with its unique advantages, improving the performance and reliability of products.

[0018] In summary, the polyurethane resin material has significant advantages over traditional epoxy resins in terms of temperature stability, mechanical properties, chemical stability, and application fields. Beneficial effects

[0019] 1. The polyurethane resin material of the present invention is environmentally friendly and odorless, meeting environmental protection requirements.

[0020] 2. The polyurethane resin material of the present invention does not produce foaming during the preparation process, and has a flat appearance.

[0021] 3. The preparation method of the present invention is simple, easy to operate, and suitable for large-scale production.

[0022] The comparison between the product of the present invention and traditional epoxy resin tests is shown in the following table.

[0023] Serial number Category Hardness (shore D) Tensile strength (Mpa) Elongation Flexural strength (Mpa) Flexural modulus (Mpa) Impact strength (J / m) Shrinkage rate (‰) Weather resistance 1 New polyurethane resin 85D 60Mpa 13% 80Mpa 2000Mpa 7kJ / m2 3‰ Has good weather resistance 2 Traditional epoxy resin 80D 40 - 90Mpa 10% 60Mpa 25000Mpa 2 - 7kJ / m2 20‰ The cured product is easily degraded and chain - broken after sunlight irradiation Specific implementation manners Example 1

[0024] The preparation method of the environmentally friendly and non-foaming new polyurethane resin material for handicrafts has the following steps: Mix 50 parts of polyether polyol, 10 parts of small molecule polyol, 1 part of methyl ethyl ketone, and 15 parts of aliphatic diisocyanate evenly to form a basic resin solution. Add 1 part of water-based chain extender, 6 parts of hydrophilic agent, 2 parts of cross-linking agent, 5 parts of catalyst, and 5 parts of salt-forming agent to the basic resin solution, and stir evenly. Heat the mixed solution to 80 °C and carry out a polymerization reaction for 4 hours to form a uniform polyurethane resin material. Example 2

[0025] The preparation method of the environmentally friendly and non-foaming new polyurethane resin material for handicrafts has the following steps: Mix 60 parts of polyether polyol, 15 parts of small molecule polyol, 2 parts of methyl ethyl ketone, and 30 parts of aliphatic diisocyanate evenly to form a basic resin solution. Add 2 parts of water-based chain extender, 8 parts of hydrophilic agent, 4 parts of cross-linking agent, 6 parts of catalyst, and 7 parts of salt-forming agent to the basic resin solution, and stir evenly. Heat the mixed solution to 90 °C and carry out a polymerization reaction for 6 hours to form a uniform polyurethane resin material. Example 3

[0026] Preparation method of an environmentally friendly non-foaming new polyurethane resin material for handicrafts, comprising the following steps: Mix 55 parts of polyether polyol, 12.5 parts of small molecule polyol, 1.5 parts of methyl ethyl ketone and 22.5 parts of aliphatic diisocyanate evenly to form a base resin solution. Add 1.5 parts of water-based chain extender, 7 parts of hydrophilic agent, 3 parts of crosslinking agent, 5.5 parts of catalyst and 6 parts of salifying agent to the base resin solution and stir evenly. Heat the mixed solution to 85 °C and carry out a polymerization reaction for 5 hours to form a uniform polyurethane resin material.

[0027] The following table is the weight part ratio table of the raw materials for Example 1, Example 2 and Example 3.

[0028] Serial number Polyether polyol Small molecule polyol Methyl ethyl ketone Aliphatic diisocyanate Water - based chain extender Hydrophilic agent Cross - linker Catalyst Salt - forming agent 1 50 parts 10 parts 1 part 15 parts 1 part 6 parts 2 parts 5 parts 5 parts 2 60 parts 15 parts 2 parts 30 parts 2 parts 8 parts 4 parts 6 parts 7 parts 3 55 parts 12.5 parts 1.5 parts 22.5 parts 1.5 parts 7 parts 3 parts 5.5 parts 6 parts

[0029] The following table is the parameter table of the raw materials for Example 1, Example 2 and Example 3.

[0030] Serial number Deformation temperature Hardness (shore D) Tensile strength (Mpa) Elongation Flexural strength (Mpa) Flexural modulus (Mpa) Impact strength (J / m) Shrinkage rate (‰) Whether there is foaming phenomenon 1 80℃ 85D 60Mpa 13% 80Mpa 2000Mpa 7kJ / m2 3‰ None 2 90℃ 83D 62Mpa 11% 81Mpa 2000Mpa 7kJ / m2 3‰ None 3 85℃ 83.5D 61Mpa 11% 81.5Mpa 2000Mpa 7kJ / m2 3‰ None

Claims

1. Environmentally friendly and non-foaming new polyurethane resin material for handicrafts, characterized by: The raw material components and weight proportions thereof are: 50-60 of polyether polyol, 10-15 of small molecule polyol, 1-2 of methyl ethyl ketone, 15-30 of aliphatic diisocyanate, 1-2 of water-based chain extender, 6-8 of hydrophilic agent, 2-4 of crosslinking agent, 5-6 of catalyst and 5-7 of salt-forming agent.

2. The environmentally friendly non-foaming new polyurethane resin material for handicrafts according to claim 1 is characterized in that: Among them The weight proportion of the raw materials is 53-58 of polyether polyol, 11-14 of small molecule polyol, 1.5-2 of methyl ethyl ketone, 18-28 of aliphatic diisocyanate, 1.5-2 of water-based chain extender, 7-8 of hydrophilic agent, 3-4 of crosslinking agent, 5.5-6 of catalyst and 5.5-7 of salt-forming agent.

3. The environmentally friendly non-foaming new polyurethane resin material for handicrafts according to claim 1 is characterized by: Among them The weight proportion of the raw materials is: 55 parts of polyether polyol, 12 parts of small molecule polyol, 1.8 parts of methyl ethyl ketone, 23 parts of aliphatic diisocyanate, 1.8 parts of water-based chain extender, 7.5 parts of hydrophilic agent, 3.5 parts of cross-linking agent, 5.8 parts of catalyst and 6.5 parts of salt-forming agent.

4. The environmentally friendly non-foaming new polyurethane resin material for handicrafts according to claim 1, 2 or 3, characterized in that: The water-based chain extender is polyester diol or epoxy polyester.

5. The environmentally friendly non-foaming new polyurethane resin material for handicrafts according to claim 1, 2 or 3, characterized in that: The hydrophilizing agent is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI).

6. The environmentally friendly non-foaming new polyurethane resin material for handicrafts according to claim 1, 2 or 3, characterized in that: The crosslinking agent is polycarbodiimide.

7. The environmentally friendly non-foaming new polyurethane resin material for handicrafts according to claim 1, 2 or 3, characterized in that: The catalyst is dimethylcyclohexylamine.

8. The environmentally friendly non-foaming new polyurethane resin material for handicrafts according to claim 1, 2 or 3, characterized in that: The salt-forming agent is triethylamine.

9. A method for preparing an environmentally friendly, non-foaming, novel polyurethane resin material for handicrafts, characterized by: The process includes the following steps: ① uniformly mixing polyether polyol, small molecule polyol, methyl ethyl ketone and aliphatic diisocyanate to form a base resin solution; ② adding a water-based chain extender, a hydrophilic agent, a cross-linking agent, a catalyst and a salt-forming agent to the base resin solution and stirring the mixture evenly; ③ heating the mixed solution to 80-90° C. to perform a polymerization reaction until a uniform polyurethane resin material is formed.