Gutta-percha bead filler for tire and preparation method thereof
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The technology of eucommia rubber and apex rubber is applied in the field of eucommia rubber apex rubber for tires and its preparation, which can solve the problems of fatigue failure of rubber products, and achieve the effects of less deformation, high hardness and good flexural resistance than permanent use.
Inactive Publication Date: 2017-08-25
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Embodiment 1
[0025] A rubber eucommia apex rubber for tires, consisting of the following components by weight:
[0026] 50 parts of natural Eucommia gum
[0027] Natural rubber 50 parts
[0028] Zinc oxide 5 parts
[0029] 3 parts stearic acid
[0030] Anti-aging agent 2.5 parts
[0031] Accelerator 0.8 parts
[0032] Anti-scorch agent 0.3 part
[0033] Sulfur 2.6 parts
[0034] Carbon black N330 50 parts
[0035] The prepared apex rubber of the formula of above-mentioned embodiment 1, vulcanization performance parameter is as follows:
[0036] 300% modulus stress 16.02MPa; tensile strength 19.96MPa; elongation at break 367%; Shore A hardness 73; wear volume 0.29cm 3 / 1.61km; 180,000 times of bending resistance.
Embodiment 2
[0038] A kind of eucommia apex rubber for tires, consisting of the following ingredients by weight
[0039] Eucommia gum 100 parts
[0040] Zinc oxide 8 parts
[0041] 3 parts stearic acid
[0042] Anti-aging agent 2.5 parts
[0043] Accelerator 0.8 parts
[0044] Anti-scorch agent 0.3 parts
[0045] Sulfur 2.6 parts
[0046] Carbon black N330 50 parts
[0047] The prepared tire apex rubber of the formula of above-mentioned embodiment 2, vulcanizate performance parameter is as follows:
[0048] 300% modulus stress 19.44MPa;
[0049] Tensile strength 20.79MPa;
[0050] Elongation at break 408%;
[0051] The Shore A hardness is 99;
[0052] Abrasion volume 0.24cm 3 / 1.61km;
[0053] The bending resistance is 240,000 times without cracking.
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Abstract
The invention provides a gutta-percha bead filler for a tire and a preparation method thereof and relates to a bead filler for a tire and a preparation method thereof. Gutta-percha is synthesized (TPI) or natural gutta-percha (EUG), the number-average molecular weight is 150,000-500,000 and the molecular weight distribution index PI is 1.8-3.5. The natural gutta-percha is derived from a gutta-percha extract contained in leaves, peels and shells in eucommia ulmoides plants. The invention adjusts a production technology for preparing the gutta-percha bead filler for a tire with higher hardness and strength. According to the invention, after the gutta-percha is combined with the others, various mechanical properties of the sizing material, such as, overall hardness, ageing resistance, fatigue resistance, shearing resistance and dynamic temperature rise, are improved, wherein the improvement of permanent deformation under compression and dynamic heat dissipating is especially obvious; after the bead filler is prepared, the shape of a tire ring can be excellently kept; the operation stability of a tire can be increased, the rolling resistance can be reduced and the fatigue resistance can be enhanced; the gutta-percha bead filler is suitable for the manufacturing of various tire products.
Description
technical field [0001] The invention relates to an apex rubber for tires and a preparation method thereof, in particular to a eucommia apex rubber for tires and a preparation method thereof. Background technique [0002] Eucommia rubber, also known internationally as gutta-pereha, is a natural polymer material produced from the Eucommia tree, which is isomers with natural rubber. Eucommia rubber is extracted from Eucommia ulmoides and other plants, and its main component is trans-1,4-polyisoprene (EUG for short), which crystallizes rapidly and presents two crystal forms below 60°C. Crystalline polymer with high hardness and high tensile strength. At present, the rubber composition modified by Eucommia rubber has the advantages of high hardness, wear resistance, tear resistance, corrosion resistance, fatigue resistance, and small permanent deformation. It can be used together with natural rubber and synthetic rubber, and is used to prepare high-quality rubber. Good material...
Claims
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Application Information
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