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High-performance polyurethane elastomer and preparation method thereof

A polyurethane elastomer, high-performance technology, applied in the field of high-performance polyurethane elastomer and its preparation, can solve the problems of environmental pollution, deterioration of prepolymer, physical injury of operators, etc., and achieves high bearing performance, low dynamic heat generation, The effect of reducing environmental pollution

Active Publication Date: 2014-07-16
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Li Yanfei, Pang Kunwei, Ou Zhimin. Synthesis and performance research of p-phenylene diisocyanate polyurethane elastomer [J]. Polyurethane Industry, 2007, 22(2), 21-24, studied the heat resistance of PPDI polyurethane elastomer , where HQEE is used as the chain extender. When HQEE is used alone as the chain extender, the PPDI prepolymer component must be kept at a relatively high temperature (not lower than 100°C) to ensure that HQEE does not precipitate during the casting process. It is a great disadvantage for PPDI, which is easy to sublimate, not only will cause the prepolymer to deteriorate at high temperature, but also easily cause environmental pollution and cause bodily harm to operators

Method used

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  • High-performance polyurethane elastomer and preparation method thereof
  • High-performance polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of component A: Dehydrate 400g of PCL with a number average molecular weight of 2000 at 95-100°C for 2h at a vacuum degree of -0.1MPa, add 67.6g of PPDI, react at 70-80°C for 1.5h, and vacuum dehydrate Soak and set aside.

[0032] (2) Preparation of component B: After melting 100g of HER at 85°C, mix it with 0.4g of catalyst (a solution with 33% triethylenediamine content prepared in propylene glycol) and keep it in a liquid state.

[0033] (3) Preparation of elastomer: Keep component A at 75-80°C, component B at 80-85°C, mix A / B components uniformly according to the weight ratio of 100 / 9 and defoam, pour 120 In the mold at ℃, demould for 60 minutes, vulcanize for 20 hours at 120 ℃, and measure performance after 7 days at room temperature. The properties of the obtained materials are shown in Table 2.

Embodiment 2

[0035] (1) Preparation of component A: Dehydrate 400g of PCL with a number average molecular weight of 1000 at 95-100°C for 2h at a vacuum of -0.1MPa, add 118g of PPDI, react at 70-80°C for 1.5h, and vacuum defoam , the material is ready for use.

[0036] (2) Preparation of component B: Melt 60g of HER and 30g of HQEE at 100°C, mix with 0.45g of catalyst (a solution with 33% triethylenediamine content prepared in propylene glycol) and keep it in a liquid state .

[0037] (3) Preparation of elastomer: Keep component A at 75-80°C, component B at 85-90°C, mix A / B components uniformly according to the weight ratio of 100 / 12 and defoam, pour 120 In the mold at ℃, demould for 30 minutes, vulcanize for 20 hours at 120 ℃, and measure performance after 7 days at room temperature. The properties of the obtained materials are shown in Table 2.

Embodiment 3

[0039] (1) Preparation of component A: Dehydrate 400g of PCL with a number-average molecular weight of 1000 at 95-100°C for 2h at a vacuum of -0.1MPa, add 104.5g of PPDI, and react at a temperature of 70-80°C for 1.5h , vacuum defoaming, and discharge for later use.

[0040](2) Preparation of component B: After melting 50g of HER, 50g of HQEE and 15.7g of TIPA at 100°C, they were evenly mixed with 0.4g of T12 catalyst and kept in a liquid state.

[0041] (3) Preparation of elastomer: Keep component A at 75-80°C, component B at 85-90°C, mix A / B components uniformly according to the weight ratio of 100 / 8.3 and defoam, pour 120 In the mold at ℃, demould for 60 minutes, vulcanize for 20 hours at 120 ℃, and measure performance after 7 days at room temperature. The properties of the obtained materials are shown in Table 2.

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Abstract

The invention discloses a high-performance polyurethane elastomer and a preparation method thereof. The high-performance polyurethane elastomer comprises two parts, i.e., a prepolymer component (component A) and a chain extender (component B), wherein the component A comprises the following materials in parts by weight: 100 parts of macromolecular dihydric alcohol and 14-35 parts of PPDI; the component B comprises the following materials in parts by weight: 100 parts of chain extender and 0.1-0.5 part of catalyst; the weight ratio of the component A to the component B is 100: 6-15; the chain extender is micromolecular dihydric alcohol, three-functionality-degree alcohol amine, three-functionality-degree alcohol or combination thereof; the micromolecular dihydric alcohol is selected from resorcinol-bi(beta-ethoxyl) ether (HER) or composition of the resorcinol-bi (beta-ethoxyl) ether (HER) and p-hydroquinone-bi(beta-ethoxyl) ether (HQEE) in the weight ratio of 1:0-2. The obtained elastomer material has the advantages that the permanent deformation is small, the resilience is excellent, the heat resistance and the mechanical performance are good and the temperature for the use and the operation of the prepolymer is low.

Description

technical field [0001] The invention relates to a high-performance polyurethane (PU) elastomer and a preparation method thereof, in particular to a high-performance polyurethane elastomer with excellent resilience, low compression set, good heat resistance, mechanical properties and dynamic mechanical properties . Background technique [0002] The polyurethane elastomer molecular chain contains a large number of polar groups (such as ester groups, ether groups, carbamate groups, urea groups, biuret groups and allophanate groups, etc.), and has a strong intermolecular Force and hydrogen bonding, thus endowing elastomers with many excellent properties, such as good mechanical properties, including tensile strength, tear strength and abrasion resistance. And it still has good elasticity and elongation in the range of high hardness (Shore 80A ~ 80D), but this strong intermolecular interaction makes PU elastomer endogenous under dynamic use conditions (such as repeated compressi...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/44C08G18/48C08G18/32
CPCC08G18/10C08G18/4238C08G18/4277C08G18/7614C08G18/3215C08G18/3281C08G18/3206
Inventor 苏丽丽石雅琳韦永继张永
Owner LIMING RES INST OF CHEM IND
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