A kind of novel polyether ester elastomer and preparation method thereof

Abstract

The invention provides a novel polyether ester elastomer and a preparation method thereof. The polyether ester elastomer of the invention is prepared by mixing and reacting components comprising the following parts by mass: 100 parts by mass of polyester polyol; 100 parts by mass of polyether polyol; 25-100 parts by mass of alcohol; 5-55 parts by mass of isocyanate; preferably, 50-100 parts by mass of polyether polyol; preferably, 8-28 parts by mass of isocyanate. The polyether ester elastomer provided by the invention can be prepared by reaction in a relatively short time, and has good rebound performance.

Description

technical field

[0001] The invention relates to the field of elastomer materials, in particular to a novel polyether ester elastomer and a preparation method thereof. Background technique

[0002] Thermoplastic polyetherester elastomer is a new type of engineering grade elastomer material, which combines the characteristics of thermoplastics and rubber, and has diversified properties, such as good mechanical strength, heat resistance, hydrolysis resistance, UV resistance, chemical resistance It is widely used in automobile industry, electronics industry, electronic appliances, industrial products, sporting goods and shoemaking and other fields.

[0003] Most industrial polyether ester elastomers are synthesized from polybutylene terephthalate (PBT) made from terephthalic acid (PTA) or dimethyl terephthalate (DMT) and butanediol (BDO). ) is the hard segment, and polytetrahydrofuran (PTMG) is the soft segment. The preparation process of the polymer usually includes the ester...

Examples

Embodiment 1

[0040] Preparation of polyester polyol: Mix 830g of terephthalic acid (PTA), 1080g of butanediol (BDO) and 1.0g of tetrabutyl titanate catalyst and vacuum dehydrate, control the system temperature at 180°C for prepolymerization, and react for 3 hours , raise the temperature to 220°C and lower the pressure slowly to 6KPa, keep the temperature for 2 hours to obtain a polyester polyol with a number average molecular weight of 1000 and an acid value of 0.5mgKOH / g, cool down to about 100°C for use.

[0041] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1): the above-mentioned polyester polyol of 200g, 200g (M n =1000) polytetrahydrofuran (PTMG) and 100 g of diphenylmethane diisocyanate (MDI) were added into a twin-screw extruder to react and pelletize at 180° C. for 30 minutes.

Embodiment 2

[0043] Preparation of polyester polyol: 830g of terephthalic acid, 900g of butanediol and 1.0g of tetrabutyl titanate catalyst were mixed and vacuum dehydrated, and the temperature of the system was controlled at 180°C for prepolymerization. After 3 hours of reaction, the temperature was raised to 220°C and Slowly lower the pressure to 6KPa, keep it warm for 2 hours to obtain a polyester polyol with a number average molecular weight of 2000, and an acid value of 0.3 mgKOH / g, and lower the temperature to about 100°C for use.

[0044] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1.03): the above-mentioned polyester polyol of 400g, 400g (M n =2000) polytetrahydrofuran and 103 g of diphenylmethane diisocyanate were added into a twin-screw extruder to react and pelletize at 180° C. for 30 minutes.

Embodiment 3

[0046] Preparation of polyester polyol: 830g of terephthalic acid, 900g of butanediol and 1.0g of tetrabutyl titanate catalyst were mixed and vacuum dehydrated, and the temperature of the system was controlled at 180°C for prepolymerization. After 3 hours of reaction, the temperature was raised to 220°C and Slowly lower the pressure to 6KPa, keep it warm for 2 hours to obtain a polyester polyol with a number average molecular weight of 2000, and an acid value of 0.3 mgKOH / g, and lower the temperature to about 100°C for use.

[0047] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1.08): the above-mentioned polyester polyol of 400g, 200g (M n =1000) polytetrahydrofuran and 216g of diphenylmethane diisocyanate were added to the reactor and reacted at 180°C. The reaction time was 50 minutes, and granulation was carried out after the reaction was completed.

technical field

[0001] The invention relates to the field of elastomer materials, in particular to a novel polyether ester elastomer and a preparation method thereof. Background technique

[0002] Thermoplastic polyetherester elastomer is a new type of engineering grade elastomer material, which combines the characteristics of thermoplastics and rubber, and has diversified properties, such as good mechanical strength, heat resistance, hydrolysis resistance, UV resistance, chemical resistance It is widely used in automobile industry, electronics industry, electronic appliances, industrial products, sporting goods and shoemaking and other fields.

[0003] Most industrial polyether ester elastomers are synthesized from polybutylene terephthalate (PBT) made from terephthalic acid (PTA) or dimethyl terephthalate (DMT) and butanediol (BDO). ) is the hard segment, and polytetrahydrofuran (PTMG) is the soft segment. The preparation process of the polymer usually includes the ester...

Examples

Embodiment 1

[0040] Preparation of polyester polyol: Mix 830g of terephthalic acid (PTA), 1080g of butanediol (BDO) and 1.0g of tetrabutyl titanate catalyst and vacuum dehydrate, control the system temperature at 180°C for prepolymerization, and react for 3 hours , raise the temperature to 220°C and lower the pressure slowly to 6KPa, keep the temperature for 2 hours to obtain a polyester polyol with a number average molecular weight of 1000 and an acid value of 0.5mgKOH / g, cool down to about 100°C for use.

[0041] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1): the above-mentioned polyester polyol of 200g, 200g (M n =1000) polytetrahydrofuran (PTMG) and 100 g of diphenylmethane diisocyanate (MDI) were added into a twin-screw extruder to react and pelletize at 180° C. for 30 minutes.

Embodiment 2

[0043] Preparation of polyester polyol: 830g of terephthalic acid, 900g of butanediol and 1.0g of tetrabutyl titanate catalyst were mixed and vacuum dehydrated, and the temperature of the system was controlled at 180°C for prepolymerization. After 3 hours of reaction, the temperature was raised to 220°C and Slowly lower the pressure to 6KPa, keep it warm for 2 hours to obtain a polyester polyol with a number average molecular weight of 2000, and an acid value of 0.3 mgKOH / g, and lower the temperature to about 100°C for use.

[0044] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1.03): the above-mentioned polyester polyol of 400g, 400g (M n =2000) polytetrahydrofuran and 103 g of diphenylmethane diisocyanate were added into a twin-screw extruder to react and pelletize at 180° C. for 30 minutes.

Embodiment 3

[0046] Preparation of polyester polyol: 830g of terephthalic acid, 900g of butanediol and 1.0g of tetrabutyl titanate catalyst were mixed and vacuum dehydrated, and the temperature of the system was controlled at 180°C for prepolymerization. After 3 hours of reaction, the temperature was raised to 220°C and Slowly lower the pressure to 6KPa, keep it warm for 2 hours to obtain a polyester polyol with a number average molecular weight of 2000, and an acid value of 0.3 mgKOH / g, and lower the temperature to about 100°C for use.

[0047] Preparation of polyether ester elastomer (the isocyanate index NCO / OH in the formula system is 1.08): the above-mentioned polyester polyol of 400g, 200g (M n =1000) polytetrahydrofuran and 216g of diphenylmethane diisocyanate were added to the reactor and reacted at 180°C. The reaction time was 50 minutes, and granulation was carried out after the reaction was completed.

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