Polyurethane solid tire material and preparation method thereof
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A solid tire and polyurethane technology, applied in the field of polyurethane materials, can solve the problems of easily polluting the environment and containing organic solvents
Inactive Publication Date: 2016-02-17
JIAXING HEXIN CHEM IND
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Chinese patent CN200610033348 "A Polyurethane Solid Tire and Its Manufacturing Method" introduces oligomer polyol-diphenylmethane diisocyanate/toluene diisocyanate syste
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[0014] The preparation method of this polyurethane solid tire material comprises the following steps:
[0015] (1) Polyesterification of dibasic acid and polyol under the action of catalyst B under the protection of nitrogen at 140°C-250°C until the acid value drops below 1mgKOH / g and the hydroxyl value is 30-200mgKOH / g The reaction is stopped at a time of g to obtain a polyester polyol; the functionality of the polyester polyol is controlled at 2 to 2.7.
[0016] (2) Preparation of component A: Add the polyester polyol prepared in step (1), chain extender, foaming agent, catalyst A, and foam stabilizer into the reactor, heat up to 50-80°C and mix evenly, then Cool to 35-40°C and discharge to obtain component A; the final product is liquid at 40-50°C, with a viscosity of about 200-600CPs.
[0017] (3) Preparation of component B: react the polyester polyol prepared in step (1) with polyether polyol and isocyanate in the presence of a side reaction terminator at 70-80°C for 2-3...
Embodiment 1
[0020] Preparation of polyester polyol 1: Mix 518gAA, 222gPTA, 203gEG, 203gDEG, 33.5gTMP and 5g catalyst tetraisobutyl titanate, heat to 240°C under nitrogen protection for polyesterification reaction, react for 20Hr, acid value is 0.3mgKOH / g, hydroxyl value 70mgKOH / g, stop the reaction, and make polyester polyol 960g.
Embodiment 2
[0022] Preparation of polyester polyol 2: Mix 470gAA, 117gPTA, 111gEG, 258gDEG, 22gTMP and 5g catalyst tetraisobutyl titanate, heat to 230°C under nitrogen protection for polyesterification reaction, reaction 18Hr, acid value 0.3mgKOH / g , The reaction was stopped when the hydroxyl value was 56 mgKOH / g, and 960 g of polyester polyol was obtained.
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Abstract
The invention relates to a polyurethane solid tire material. The polyurethane solid tire material comprises a component A and a component B, wherein the component A is a mixture prepared by mixing polyester polyol, a chain extender, a foaming agent, a catalyst A and a foam stabilizer according to a mass ratio of 100:(5 to 30):(0.3 to 3.0):(0.3 to 3.0):(0.3 to 2.5), the component B is prepared by prepolymerizing isocyanate, polyester polyol and polyether polyol under the existence of a side reaction inhibitor according to a mass ratio of 100:(20 to 50):(0 to 30), and the polyester polyol in the component A and the component B is prepared by prepolymerizing binary acid and polyhydric alcohols under the action of a catalyst B. The component A and the component B are fully mixed, and are then injected into a mold for reaction to form, and demolding and aging are performed, so as to prepare a tire product. The prepared tire product has the advantages of low density, stable size, high tread hardness, good abrasion resistance and good bonding capability with other accessories of the tire.
Description
technical field [0001] The invention belongs to the field of polyurethane materials, and in particular relates to a polyurethane solid tire material and a preparation method thereof. Background technique [0002] Polyurethane is a material with excellent performance. Among all elastomers, polyurethane rubber has the best wear resistance, so it is called "wear-resistant rubber". Compared with natural rubber, its wear resistance can be improved by 2 to 10 times as much. At the same time, it also has high mechanical strength and tear resistance, coupled with its excellent shock absorption and buffer performance, it has a better ability to "overcome rigidity with softness", and is more suitable for making various tire products use. Polyurethane tires have a wide range of applications, and the use effect is also very distinctive. Solid tires made of polyurethane are very wear-resistant and durable, and light in weight. Tire Air Refill. It is applied to small carts, baby carri...
Claims
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