Green tyre in composite structure between wheel track of polyurethane and tyre core of rubber, and fabricating method

Abstract

A composite type composed of polyurethane surface layer and main body of rubber is prepared through treating the surface of main body, synthesizing and modifying the prepolymer of polyurethane, and casting the surface layer. Its advantages are high elasticity and antiwear nature, and low rolling resistance.

Description

technical field

[0001] The invention relates to a composite tire and its manufacturing technology, more specifically to a polyurethane tread-rubber carcass composite structure green tire and its manufacturing method. Background technique

[0002] The so-called green tires generally refer to radial tires with low rolling resistance, low fuel consumption and low exhaust emissions in the world. Compared with ordinary tires, green tires can reduce rolling resistance by 22-25%, and save fuel by 3-8%. Since the French Michelin Company announced its vigorous development of green tires in 1991, major tire companies in Europe, the United States and Japan have successively accelerated the pace of green tire development. At present, green tires have become a hot topic in the development of the tire industry.

[0003] The research on green tires has a history of more than ten years. Generally speaking, there are two main directions.

[0004] 1. All-natural r...

Examples

Embodiment 2

[0108] Step 1: Surface treatment of rubber carcass

[0109] Place the radial tire carcass on a rotatable rack, grind the part to be bonded to the tread, spray or brush a layer of polyisocyanate surface treatment solution evenly, and pour the tread after 1.5 hours of parking, but The parking time should not exceed 12 hours, and the surface should not be contaminated with moisture and dust.

[0110] Step two:

[0111] This embodiment adopts polytetrahydrofuran diol-1,5-naphthalene diisocyanate prepolymer, and adopts prepolymerization post-mixing method to modify with nano-silica:

[0112] Weigh 2 parts by weight of white carbon black with an average particle diameter of 15-25 nm, heat to 250° C. under nitrogen protection, and activate for 6 hours. Weigh 1.5 parts by weight of 1,5-naphthalene diisocyanate (NDI), and dissolve it in 4.5 parts by weight of anhydrous toluene. Gradually raise the temperature to 80±2°C, react for 1.5 hours, and measure the reaction degree of 1,5-nap...

Embodiment 3

[0119] Step 1: Surface treatment of rubber carcass

[0120] On the tire building machine, the special transition layer film is directly attached to the formed carcass. After the carcass is vulcanized, the bonding part of the carcass and the tread is ground, and then the tread can be poured.

[0121] Step 2: Selection and modification of polyurethane prepolymerization system

[0122] In this embodiment, a mixture of polyether polyol and polyester polyol is selected, and the mixture is modified with nano-titanium dioxide after prepolymerization.

[0123] Weigh 50 parts by weight of polytetrahydrofuran diol with a molecular weight of 2000, and 50 parts by weight of hydroxyl-terminated polybutadiene with a molecular weight of 2000, put them into a reaction kettle, heat and melt, start stirring, and gradually heat up to 125-135 ° C, and vacuumize to -0.095~-0.098Mpa, keep for 2.5~3 hours to remove moisture; cool down to below 60℃, add 35 parts of diphenylmethane diisocyanate, con...

Embodiment 4

[0130] Step 1: Surface treatment of rubber carcass

[0131] Place the radial tire carcass on a rotatable rack, grind the part to be bonded to the tread, spray or brush a layer of polyisocyanate surface treatment solution evenly, and pour the tread after parking for 7.5 hours.

[0132] Step 2: Selection and modification of polyurethane prepolymer system

[0133] The hydroxyl-terminated polybutadiene-diphenylmethane diisocyanate prepolymer is selected and modified with nanometer titanium dioxide. First, put 100 parts by weight of hydroxyl-terminated polybutadiene with a molecular weight of 1000 into the reactor, heat to melt, start stirring, and gradually raise the temperature to 128-132°C, vacuumize to -0.095-0.098Mpa, and keep it for 2.5 hours to remove Moisture; lower the temperature to below 60°C, add 48 parts by weight of diphenylmethane diisocyanate, continue to stir and keep the temperature at 73°C, and react for 2 hours to obtain a polyurethane prepolymer; take samples ...

technical field

[0001] The invention relates to a composite tire and its manufacturing technology, more specifically to a polyurethane tread-rubber carcass composite structure green tire and its manufacturing method. Background technique

[0002] The so-called green tires generally refer to radial tires with low rolling resistance, low fuel consumption and low exhaust emissions in the world. Compared with ordinary tires, green tires can reduce rolling resistance by 22-25%, and save fuel by 3-8%. Since the French Michelin Company announced its vigorous development of green tires in 1991, major tire companies in Europe, the United States and Japan have successively accelerated the pace of green tire development. At present, green tires have become a hot topic in the development of the tire industry.

[0003] The research on green tires has a history of more than ten years. Generally speaking, there are two main directions.

[0004] 1. All-natural r...

Examples

Embodiment 2

[0108] Step 1: Surface treatment of rubber carcass

[0109] Place the radial tire carcass on a rotatable rack, grind the part to be bonded to the tread, spray or brush a layer of polyisocyanate surface treatment solution evenly, and pour the tread after 1.5 hours of parking, but The parking time should not exceed 12 hours, and the surface should not be contaminated with moisture and dust.

[0110] Step two:

[0111] This embodiment adopts polytetrahydrofuran diol-1,5-naphthalene diisocyanate prepolymer, and adopts prepolymerization post-mixing method to modify with nano-silica:

[0112] Weigh 2 parts by weight of white carbon black with an average particle diameter of 15-25 nm, heat to 250° C. under nitrogen protection, and activate for 6 hours. Weigh 1.5 parts by weight of 1,5-naphthalene diisocyanate (NDI), and dissolve it in 4.5 parts by weight of anhydrous toluene. Gradually raise the temperature to 80±2°C, react for 1.5 hours, and measure the reaction degree of 1,5-nap...

Embodiment 3

[0119] Step 1: Surface treatment of rubber carcass

[0120] On the tire building machine, the special transition layer film is directly attached to the formed carcass. After the carcass is vulcanized, the bonding part of the carcass and the tread is ground, and then the tread can be poured.

[0121] Step 2: Selection and modification of polyurethane prepolymerization system

[0122] In this embodiment, a mixture of polyether polyol and polyester polyol is selected, and the mixture is modified with nano-titanium dioxide after prepolymerization.

[0123] Weigh 50 parts by weight of polytetrahydrofuran diol with a molecular weight of 2000, and 50 parts by weight of hydroxyl-terminated polybutadiene with a molecular weight of 2000, put them into a reaction kettle, heat and melt, start stirring, and gradually heat up to 125-135 ° C, and vacuumize to -0.095~-0.098Mpa, keep for 2.5~3 hours to remove moisture; cool down to below 60℃, add 35 parts of diphenylmethane diisocyanate, con...

Embodiment 4

[0130] Step 1: Surface treatment of rubber carcass

[0131] Place the radial tire carcass on a rotatable rack, grind the part to be bonded to the tread, spray or brush a layer of polyisocyanate surface treatment solution evenly, and pour the tread after parking for 7.5 hours.

[0132] Step 2: Selection and modification of polyurethane prepolymer system

[0133] The hydroxyl-terminated polybutadiene-diphenylmethane diisocyanate prepolymer is selected and modified with nanometer titanium dioxide. First, put 100 parts by weight of hydroxyl-terminated polybutadiene with a molecular weight of 1000 into the reactor, heat to melt, start stirring, and gradually raise the temperature to 128-132°C, vacuumize to -0.095-0.098Mpa, and keep it for 2.5 hours to remove Moisture; lower the temperature to below 60°C, add 48 parts by weight of diphenylmethane diisocyanate, continue to stir and keep the temperature at 73°C, and react for 2 hours to obtain a polyurethane prepolymer; take samples ...