润滑科技信息平台

专利摘要

本发明涉及用于增强橡胶化合物的导电性和物理机械性能的添加剂,尤其包括复合弹性体基材料(橡胶)的弹性模量、拉伸强度、抗撕裂性和耐磨性,并且涉及复合弹性体基材料(橡胶)。本发明提出一种添加剂,其含有1至20重量%的碳纳米管、3至90重量%的高粘度有机橡胶和8至95重量%的低分子量有机分散介质。本发明还提出了该添加剂的制备方法。 ......

基本信息

专利类型:
发明专利
申请/专利号:
US18/039247
申请日期:
2022-02-21
专利申请人:
分类号:
C08K3/04 ; C08J3/20
发明/设计人:
PREDTECHENSKIY, MIKHAIL RUDOLFOVICH ， KHASIN, ALEXANDR ALEXANDROVICH ， KARPUNIN, RUSLAN VLADIMIROVICH ， SKURATOV, ANDREY YURIEVICH ， FILIPPOV, ILYA ANATOLYEVICH ， ANUFRIEVA, ANGELINA NIKOLAEVNA ， KRUCH, VLADIMIR ANDREEVICH
权利要求: 1. An additive to rubber compounds for enhancing electrical conductivity and physical and mechanical properties of rubber, the additive comprising:1 to 20 wt % carbon nanotubes;3 to 90 wt % high-viscosity organic rubber; and8 to 95 wt % low-molecular-weight organic dispersion medium capable of dissolving the high-viscosity organic rubber (R)and selected from the group consisting of (a) oil with flash point of more than 200° C. and kinematic viscosity of less than 1 St at 100° C., (b) a polar solvent with relative dielectric permittivity of more than 5 at 25° C., and (c) an ester or a mixture of more than one esters of aliphatic alcohols with acids selected from the group consisting of (1) phthalic acid, (2) terephthalic acid, (3) sebacic acid, (4) adipic acid, and (5) cyclohexanedicarboxylic acid.2. The additive of claim 1, wherein the high-viscosity organic rubber is selected from the group consisting of: natural rubber, synthetic isoprene rubbers, styrene butadiene rubber, nitrile butadiene rubber, hydrogenated nitrile butadiene rubber, butadiene rubber or butyl rubber, halobutyl rubber, ethylene propylene rubber, ethylene propylene diene rubber containing ethylene norbornene or dicyclopentadiene as the third monomer, propylene oxide rubber, acrylate rubber, carboxylate rubber, chloroprene rubber, fluoroelastomer, and a mixture of two or more of these rubbers.3. The additive of claim 1, wherein the high-viscosity organic rubber has a viscosity ML(1+4) of more than 20 Mooney units at 100° C.4. The additive of claim 3, wherein the high-viscosity organic rubber has a viscosity ML(1+4) of more than 40 Mooney units at 100° C.5. The additive of claim 4, wherein the high-viscosity organic rubber has a viscosity ML(1+4) of more than 60 Mooney units at 100° C.6. The additive of claim 1, wherein the dispersion medium is a polar solvent with a relative dielectric permittivity of more than 40 at 25° C.7. The additive of claim 6, wherein the dispersion medium comprises at least 10 wt % propylene carbonate.8. The additive of claim 6, wherein the dispersion medium comprises at least 10 wt % 1,2-butylene carbonate, or 2,3-butylene carbonate, or a mixture thereof.9. The additive of claim 1, wherein more than 25 wt % carbon nanotubes are single-walled or double-walled carbon nanotubes.10. The additive of claim 1, wherein the carbon nanotubes have a ratio of intensities of the G/D bands of more than 10 in Raman spectrum at 532 nm.11. The additive of claim 10, wherein the carbon nanotubes have a ratio of intensities of the G/D bands of more than 40 in Raman spectrum at 532 nm.12. The additive of claim 10, wherein the carbon nanotubes have a ratio of intensities of the G/D bands of more than 60 in Raman spectrum at 532 nm.13. The additive of claim 1, wherein a ratio of a mass fraction of the carbon nanotubes to a mass fraction of rubber bound to the carbon nanotubes is less than 4.14. The additive of claim 1, wherein at least some of the carbon nanotubes are bundled.15. The additive of claim 14, wherein a thickness of at least a part of the carbon nanotube bundles is more than 300 nm.16. The additive of claim 1, further comprising particles of one or more metals from groups 8-11 or their alloys.17. The additive of claim 1, wherein the additive has a volume resistivity of not more than 2 Ohm·m at a temperature of 25° C.18. The additive of claim 1, wherein the additive has a viscosity of more than 5 and less than 90 Mooney units at a temperature of 100° C.19. The additive of claim 1, wherein a viscosity of the additive is characterized by a needle penetration depth of less than 15 mm at a temperature of 25° C. over 5 s at a defined load of 100 g.20. A method for producing the additive according to claim 1, wherein the method comprises the following sequential stages: (1) dissolving the high-viscosity rubber (R) in the dispersion medium, and (II) dispersing carbon nanotubes in the solution of stage (I).21. The method of claim 20, further comprising an additional stage of preliminary wetting and mixing of carbon nanotubes in the dispersion medium or one of the components of the dispersion medium, or in the solution of rubber (R) in the dispersion medium, between stages (I) and (II).22. The method of claim 21, wherein, after stage (II), the method further comprises stage (III) of mixing a resultant slurry of carbon nanotubes, a dispersion medium, and a high-viscosity organic rubber (R), with a high-viscosity organic rubber (R2), and wherein a ratio of a weight of rubber (R2) to a weight of the slurry after stage (II) is less than or equal to 5.23. A method for producing rubber, wherein the method comprises adding an additive according to claim 1 to the rubber.24. The method of claim 23, wherein the adding further comprises adding a filler, and/or a plasticizer, and/or an antioxidant, and/or a silane coupling agent, and/or a curing agent, and/or a cure accelerator, and/or a cure retarder, and/or a stabilizer, and/or a dye, and/or a pigment into the rubber.25. The method of claim 23, wherein the adding is performed using an internal mixer.26. The method of claim 23, wherein the adding is performed using two roll rubber mill.27. A rubber with enhanced electrical conductivity and physical and mechanical properties, the rubber comprising 0.01 to 1 wt % carbon nanotubes and wherein the rubber is produced by the method of claim 23.