Organic silicon/montmorillonite composite modified polyester-type polyurethane elastomer as well as preparation method and application thereof

Abstract

The invention belongs to the field of polymer materials and particularly relates to an organic silicon / montmorillonite composite modified polyester-type polyurethane elastomer as well as a preparation method and an application thereof. The polyurethane elastomer comprises the following components: 100 parts by mass of polyester-type polyurethane prepolymer, 0.5-100 parts by mass of isocyanate-terminated polydimethylsiloxane, 1-40 parts by mass of polyester polyol, 0.5-15 parts by mass of organic montmorillonite, 0.1-1.5 parts by mass of a defoaming agent, 0-5 parts by mass of a chain extender and 2-15 parts by mass of a curing agent. According to the polyurethane elastomer, since the polyurethane is jointly modified by virtue of organic silicon and montmorillonite, the polyurethane elastomer integrates the excellent performances of organic silicon, montmorillonite and polyurethane and thus the material has a plurality of performances, such as excellent surface property, heat resistance and good mechanical properties.

Description

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a silicone / montmorillonite composite modified polyester polyurethane elastomer and a preparation method and application thereof. Background technique

[0002] Polyurethane elastomer is a kind of polymer material ranging from rubber to plastic. It has good mechanical properties, wear resistance, fatigue resistance, oil resistance, aging resistance, etc. It has a wide range of uses and can be used for solid tires, printing, Rubber rollers, washer ball joints, bush bearings, sole gears, etc. However, its high internal heat generation, low temperature resistance, flammability, poor surface properties and dielectric properties limit its application in some fields.

[0003] Silicone has the characteristics of low surface energy, high and low temperature resistance, weather resistance, hydrophobicity, and electrical insulation. The use of silicone to modify polyurethane ca...

Examples

Embodiment 1

[0074] (1) Preparation of polyester polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 17.4g of toluene diisocyanate (TDI) and 100g of toluene diisocyanate (TDI) with an average molecular weight of 2000 and a hydroxyl value of 54-58 polyethylene adipate diol, stirred and reacted at 75°C for 5 hours to obtain a polyester polyurethane prepolymer;

[0075] (2) Preparation of isocyanate-terminated polydimethylsiloxane: In a 1000mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen gas conduit, add 12g of toluene diisocyanate (TDI), 500g of double-terminated hydroxyl poly(dimethicone) Methylsiloxane (silanol-terminated, average molecular weight 15,000) and 0.5 g of dibutyltin dilaurate were stirred and reacted for 6 hours at 90°C under the protection of nitrogen to prepare isocyanate-terminated polydimethylsiloxane ;

[0076] (3) Preparation of orga...

Embodiment 2

[0079] (1) Preparation of polyester polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 17g of hexamethylene diisocyanate (HDI) and 100g of hexamethylene diisocyanate (HDI) with an average molecular weight of 2000, hydroxyl Polycaprolactone diol with a value of 55-58 was stirred and reacted at 85°C for 6 hours to obtain a polyester polyurethane prepolymer;

[0080] (2) Preparation of isocyanate-terminated polydimethylsiloxane: In a 1000mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 5g of hexamethylene diisocyanate (HDI), 750g of double-ended Hydroxypolydimethylsiloxane (silanol-terminated, average molecular weight 50,000) and 0.7g dibutyltin dilaurate were stirred and reacted for 5 hours at 95°C under nitrogen protection to prepare isocyanate-terminated polydimethylsiloxane Silicone;

[0081] (3) Preparation of organic montmo...

Embodiment 3

[0084] (1) Preparation of polyester polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 67g of isophorone diisocyanate (IPDI) and 100g of an average molecular weight of 500, hydroxyl The polycarbonate diol with a value of 220-230 was stirred and reacted at 75°C for 10 hours to obtain a polyester polyurethane prepolymer;

[0085] (2) Preparation of isocyanate-terminated polydimethylsiloxane: In a 500-mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen gas conduit, add 9 g of isophorone diisocyanate (IPDI), 200 g of double-ended Hydroxypolydimethylsiloxane (silanol-terminated, average molecular weight 10,000) and 0.8 g of dibutyltin dilaurate were stirred and reacted for 7 hours at 85°C under nitrogen protection to prepare isocyanate-terminated polydimethylsiloxane Silicone;

[0086] (3) Preparation of organic montmorillonite: In a 500mL three-n...

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a silicone / montmorillonite composite modified polyester polyurethane elastomer and a preparation method and application thereof. Background technique

[0002] Polyurethane elastomer is a kind of polymer material ranging from rubber to plastic. It has good mechanical properties, wear resistance, fatigue resistance, oil resistance, aging resistance, etc. It has a wide range of uses and can be used for solid tires, printing, Rubber rollers, washer ball joints, bush bearings, sole gears, etc. However, its high internal heat generation, low temperature resistance, flammability, poor surface properties and dielectric properties limit its application in some fields.

[0003] Silicone has the characteristics of low surface energy, high and low temperature resistance, weather resistance, hydrophobicity, and electrical insulation. The use of silicone to modify polyurethane ca...

Examples

Embodiment 1

[0074] (1) Preparation of polyester polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 17.4g of toluene diisocyanate (TDI) and 100g of toluene diisocyanate (TDI) with an average molecular weight of 2000 and a hydroxyl value of 54-58 polyethylene adipate diol, stirred and reacted at 75°C for 5 hours to obtain a polyester polyurethane prepolymer;

[0075] (2) Preparation of isocyanate-terminated polydimethylsiloxane: In a 1000mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen gas conduit, add 12g of toluene diisocyanate (TDI), 500g of double-terminated hydroxyl poly(dimethicone) Methylsiloxane (silanol-terminated, average molecular weight 15,000) and 0.5 g of dibutyltin dilaurate were stirred and reacted for 6 hours at 90°C under the protection of nitrogen to prepare isocyanate-terminated polydimethylsiloxane ;

[0076] (3) Preparation of orga...

Embodiment 2

[0079] (1) Preparation of polyester polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 17g of hexamethylene diisocyanate (HDI) and 100g of hexamethylene diisocyanate (HDI) with an average molecular weight of 2000, hydroxyl Polycaprolactone diol with a value of 55-58 was stirred and reacted at 85°C for 6 hours to obtain a polyester polyurethane prepolymer;

[0080] (2) Preparation of isocyanate-terminated polydimethylsiloxane: In a 1000mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 5g of hexamethylene diisocyanate (HDI), 750g of double-ended Hydroxypolydimethylsiloxane (silanol-terminated, average molecular weight 50,000) and 0.7g dibutyltin dilaurate were stirred and reacted for 5 hours at 95°C under nitrogen protection to prepare isocyanate-terminated polydimethylsiloxane Silicone;

[0081] (3) Preparation of organic montmo...

Embodiment 3

[0084] (1) Preparation of polyester polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 67g of isophorone diisocyanate (IPDI) and 100g of an average molecular weight of 500, hydroxyl The polycarbonate diol with a value of 220-230 was stirred and reacted at 75°C for 10 hours to obtain a polyester polyurethane prepolymer;

[0085] (2) Preparation of isocyanate-terminated polydimethylsiloxane: In a 500-mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen gas conduit, add 9 g of isophorone diisocyanate (IPDI), 200 g of double-ended Hydroxypolydimethylsiloxane (silanol-terminated, average molecular weight 10,000) and 0.8 g of dibutyltin dilaurate were stirred and reacted for 7 hours at 85°C under nitrogen protection to prepare isocyanate-terminated polydimethylsiloxane Silicone;

[0086] (3) Preparation of organic montmorillonite: In a 500mL three-n...

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