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CN-121986222-A - Sustainable rubber compound for power transmission belt

CN121986222ACN 121986222 ACN121986222 ACN 121986222ACN-121986222-A

Abstract

The present invention relates to an article, such as a power transmission belt, comprising an elastomeric body and at least one reinforcing cord disposed in the elastomeric body. At least a portion of the elastomeric body is formed from a rubber compound including a Styrene Butadiene Rubber (SBR) sustainable polymer. The rubber compound may include additional sustainable materials, such as one or more of additional sustainable rubber, sustainable fiber, sustainable carbon black, sustainable plasticizers, and the like. The rubber compound may have a total sustainable content of 50% or greater, or even greater than 65%, for example, up to about 95% or greater in the rubber compound. The article may include additional sustainable materials, such as sustainable fabrics and/or sustainable reinforcing cords. The entire article may have a total sustainable content of 50% or greater, or up to about 95% or greater.

Inventors

  • Miles Tyson

Assignees

  • 康迪泰克德国有限公司

Dates

Publication Date
20260505
Application Date
20240925
Priority Date
20231009

Claims (20)

  1. 1. A belt (100, 200, 300) comprising: Elastomer body (102) At least one reinforcing core wire (104) arranged in the elastomer body; Wherein at least a portion of the elastomeric body (102) is formed from a rubber compound comprising one or more Styrene Butadiene Rubber (SBR) sustainable polymers.
  2. 2. The belt of claim 1, wherein: the one or more SBR sustainable polymers comprise styrene and/or butadiene monomers derived from sustainable naphtha; More particularly, wherein the sustainable naphtha is derived from renewable sources, including biomass materials, particularly plant-based materials.
  3. 3. The belt according to any one of the preceding claims, wherein: The one or more SBR-sustainable polymers are present in a total amount of 30 phr to 70 phr; More particularly, the one or more SBR-sustainable polymers are present in a total amount of 40 phr to 65 phr.
  4. 4. The belt according to any one of the preceding claims, wherein: The rubber compound comprises a total sustainable polymer content of 80 phr to 100 phr, including one or more SBR sustainable polymers; More particularly, wherein the rubber compound comprises a total sustainable polymer content of 100 phr, including one or more SBR sustainable polymers.
  5. 5. The belt according to any one of the preceding claims, wherein: The rubber compound includes one or more additional sustainable materials including one or more of natural rubber, sustainable carbon black, dispersed sustainable reinforcing fibers, sustainable plasticizers, and/or sustainable activators.
  6. 6. The tape of claim 5 or any other preceding claim, wherein: The rubber compound comprises one or more natural rubber in a total amount of 30 phr to 70 phr; more particularly, wherein the rubber compound comprises one or more natural rubbers in a total amount of 30 phr to 50 phr; More particularly wherein the total amount of the one or more natural rubbers is less than the total amount of the one or more SBR sustainable polymers.
  7. 7. The tape of claim 5 or any other preceding claim, wherein: the rubber compound comprises one or more dispersed sustainable reinforcement fibers in a total amount of 5 phr to 25 phr; More particularly, wherein the rubber compound comprises one or more dispersed sustainable reinforcement fibers in a total amount of 10 phr to 20 phr; In particular, wherein the one or more dispersed sustainable reinforcement fibers are derived from a plant based material.
  8. 8. The tape of claim 5 or any other preceding claim, wherein: the rubber compound comprises one or more sustainable plasticizer oils in a total amount of 5 phr to 20 phr; more particularly, wherein the rubber compound comprises one or more sustainable plasticizer oils derived from plant based materials and present in a total amount of 10 phr to 20 phr.
  9. 9. The tape of claim 5 or any other preceding claim, wherein: The rubber compound comprises one or more sustainable carbon blacks, in particular one or more recycled carbon blacks, in a total amount of 25 phr to 200 phr; More particularly, wherein the rubber compound comprises one or more sustainable carbon blacks, particularly one or more recycled carbon blacks, in a total amount of 75 phr to 125 phr; More particularly, wherein the rubber compound does not contain any carbon black in excess of 50 phr, other than the one or more sustainable carbon blacks.
  10. 10. The tape according to any of the preceding claims, Wherein the rubber compound comprises: (i) One or more SBR-sustainable polymers in total from 30 phr to 70 phr; (ii) One or more natural rubber in a total amount of 30 phr to 70 phr, in particular, the total amount of one or more natural rubber is less than the total amount of one or more SBR sustainable polymer; (iii) One or more sustainable plasticizer oils in a total amount of 5 phr to 20 phr, and (Iii) One or more sustainable carbon blacks, particularly recycled carbon blacks, in total amounts of 50 phr to 200 phr, the one or more sustainable carbon blacks having an average size in the range of 20 nm to 60 nm, and (Iv) In particular, no more than 50 phr of any carbon black other than one or more sustainable carbon blacks; More particularly, wherein the ratio of total SBR sustainable polymer to total sustainable plasticizer oil to total sustainable carbon black is in the range of 30:50:5 to 70:200:20, more particularly 40:75:10 to 65:150:20.
  11. 11. The tape according to any of the preceding claims, Wherein the rubber compound comprises: (i) One or more SBR-sustainable polymers in total from 30 phr to 70 phr; (ii) One or more natural rubber in a total amount of 30 phr to 70 phr, in particular, the total amount of natural rubber is less than the total amount of SBR sustainable polymer; (iii) One or more non-sustainable plasticizer oils in an amount of 5 phr to 20 phr, and (Iii) One or more sustainable carbon blacks, in particular recycled carbon blacks, in total amounts of 25 phr to 100 phr, having an average size in the range of 60 nm to 100 nm, (Iv) One or more additional carbon blacks in total ranging from 25 phr to 100 phr, the additional carbon blacks having an average size ranging from 20 nm to 60 nm, (V) In particular, no more than 50 phr of any carbon black, except for sustainable carbon black and additional carbon black; more particularly, wherein the ratio of total SBR sustainable polymer to total additional carbon black to total sustainable carbon black is in the range of 30:25:25 to 70:75:75, more particularly 40:30:30 to 65:60:60.
  12. 12. The belt of any one of the preceding claims, wherein the rubber compound: (i) Having a total sustainable material content of at least 50%, greater than 60%, greater than 70%, greater than 80%, or greater than 90%, and/or up to 95%, based on the weight of the composite, comprising SBR sustainable polymer, and/or (Ii) Has a total sustainable polymer content of at least 50%, greater than 60%, greater than 70%, greater than 80% or greater than 90%, and/or up to 95% based on the weight of the composite, including SBR sustainable polymers, and/or (Iii) Not containing any plasticizer oil other than sustainable plasticizer oil, more than 10 phr or more than 5phr, and/or (Iv) Not containing any carbon black other than sustainable carbon black, greater than 50 phr or greater than 20 phr, and/or (V) Any dispersed reinforcing fibers are not included, except for dispersed sustainable reinforcing fibers, more than 10 phr, or more than 5 phr, or more than 1 phr.
  13. 13. The belt of any one of the preceding claims, wherein the rubber compound has: (i) Elongation at break greater than 70%, more particularly in the range 70% to 300%, and/or (Ii) An elastic modulus at 50% strain of greater than 500 psi, more particularly 500 psi to 1500 psi, and/or (Iii) A tensile strength of greater than 500 psi, more particularly from 1000 psi to 4000 psi, and/or (Iv) The shore a hardness is in the range of 70 to 90.
  14. 14. The belt according to any one of the preceding claims, wherein: The rubber compound forms at least a majority of the elastomeric body; at least one reinforcing core is formed of a sustainable material, in particular of recycled polyethylene terephthalate (PET), and The belt has a total sustainable content of greater than 50%, greater than 60%, greater than 70%, greater than 80%, or greater than 90%, and/or up to 95% by weight based on the total weight of the belt.
  15. 15. The belt according to any one of the preceding claims, wherein: the one or more natural rubber is present in a total amount of 30 phr to 70 phr; The one or more SBR-sustainable polymers are present in a total amount of 30 phr to 70 phr, One or more sustainable carbon blacks, particularly recovered carbon blacks, are present at levels from 25 phr to 125 phr, One or more dispersed sustainable reinforcing fibers are present in a total amount of 5 phr to 20 phr, In particular, one or more antioxidants are present in a total amount of 1 phr to 10 phr, In particular, the one or more activators are present in a total amount of 4 phr to 20 phr.
  16. 16. The belt according to any one of the preceding claims, wherein: The rubber compound is a first rubber compound of the elastomeric body forming at least a first section of the elastomeric body and having a first sustainable content; The elastomeric body further comprises a second rubber compound comprising one or more Styrene Butadiene Rubber (SBR) sustainable polymers, the second rubber compound being different from the first rubber compound and having a second sustainable content, the second compound forming at least a second section of the elastomeric body, the second section being different from the first section; the first sustainable content and the second sustainable content are combined together in a total amount of greater than 50% by weight based on the total weight of the belt.
  17. 17. A rubber compound comprising: one or more natural rubber in a total amount of 30 phr to 70 phr; one or more SBR sustainable polymers in total ranging from 30 phr to 70 phr, One or more sustainable carbon blacks, in particular recycled carbon blacks, in total amounts of 25 phr to 150 phr, One or more dispersed sustainable reinforcement fibers in a total amount of 5 phr to 20 phr, Optionally, one or more antioxidants in a total amount of 1 phr to 10 phr, and Optionally, one or more activators in total amounts of 4 phr to 20 phr.
  18. 18. The rubber compound according to claim 17, And one or more sustainable plasticizer oils in a total amount of 5 phr to 20 phr, Wherein the one or more dispersed sustainable reinforcement fibers comprise cotton having an average size in the range of 2 mm to 7mm, Wherein the one or more sustainable carbon blacks have an average size ranging from 20 nm to 60 nm and are present in the rubber compound in a total amount of 75 phr to 150 phr; More particularly, the rubber compound does not contain any carbon black of more than 50 phr, other than the one or more recovered carbon blacks; more particularly, wherein the ratio of total SBR sustainable polymer to total sustainable plasticizer oil to total recycled carbon black is in the range of 30:50:5 to 70:200:20, more particularly 40:75:10 to 65:150:20.
  19. 19. The rubber compound according to claim 17, And one or more non-sustainable plasticizer oils in a total amount of 5 phr to 20 phr, Wherein the one or more dispersed sustainable reinforcement fibers comprise cotton having an average size in the range of 2 mm to 7mm, Wherein the one or more sustainable carbon blacks have an average size ranging from 60 nm to 100 nm and are present in the rubber compound in a total amount of 25 phr to 100 phr; The compound further comprises one or more additional carbon blacks having an average size in the range of 20nm to 60 nm and being present in the rubber compound in a total amount of 25 phr to 100 phr; more particularly, the rubber compound does not contain any carbon black of more than 50 phr, except for the recovered carbon black and additional carbon black; More particularly, wherein the ratio of SBR sustainable polymer to additional carbon black to recycled carbon black is in the range of 30:25:25 to 70:75:75, more particularly 40:30:30 to 65:60:60.
  20. 20. The rubber compound according to any one of claims 17 to 19, having: (i) Elongation at break greater than 70%, more particularly in the range 70% to 300%, and/or (Ii) An elastic modulus at 50% strain of greater than 500 psi, more particularly 500 psi to 1500 psi, and/or (Iii) A tensile strength of greater than 500 psi, more particularly from 1000 psi to 4000 psi, and/or (Iv) The shore a hardness is in the range of 70 to 90.

Description

Sustainable rubber compound for power transmission belt Technical Field The present application claims priority to U.S. non-provisional application serial No. 18/483,235, filed on 10/09 at 2023, the entire disclosure of which is incorporated herein by reference. The present invention relates generally to a sustainable rubber compound, and more particularly to a sustainable rubber compound for power transmission belts. Background In various applications, power transmission belts are used to transfer power from one rotating shaft or pulley to another rotating shaft or pulley within a machine or system. A typical power transmission belt includes an elastomeric body having an inner pulley engaging section, an outer section, and a load bearing section located between the inner and outer sections. The load-bearing section typically includes reinforcing cords and provides the belt with a majority of the tensile strength. The inner pulley engagement section of the belt may include longitudinal or transverse grooves or ribs that engage with grooves of corresponding pulleys in the drivetrain. For some belts, a groove or rib structure may also be provided in the outer section of the belt. Disclosure of Invention The elastomeric body of the drive belt is formed of a rubber compound, wherein one common rubber in the compound includes Styrene Butadiene Rubber (SBR). SBR is formed from two monomers, namely styrene and butadiene. Styrene is a hydrocarbon complex derived from petrochemical sources such as crude oil or petroleum derived naphtha. Styrene provides stiffness and hardness to SBR rubber, making SBR rubber more suitable for certain applications. Butadiene is another hydrocarbon complex derived from crude oil or naphtha by petrochemical processes such as hydrocarbon cracking. However, the current goal is to avoid petroleum derived materials and instead use sustainable materials to form rubber composites. At least one aspect of the present disclosure solves one or more problems associated with conventional petroleum-derived SBR by providing a rubber compound having an SBR-sustainable polymer. Such SBR sustainable polymers may include styrene and/or butadiene monomers derived from sustainable naphtha. The sustainable naphtha may be derived from a sustainable source such as an organic feedstock or a biomass feedstock. This may include, for example, sources of plant-based materials such as sugar cane or corn, vegetable oils, waste fats, organic waste or agricultural residues. The rubber compound may include additional sustainable materials, such as one or more of additional sustainable rubber, sustainable fiber, sustainable carbon black, sustainable plasticizers, and the like. The rubber compound may have a total sustainable content of 50% or greater, or even greater than 65%, for example, up to about 95% or greater in the rubber compound. The sustainable rubber compound and/or variations thereof may comprise a majority of the elastomeric body of the article. The article may include additional sustainable materials, such as sustainable fabrics and/or sustainable reinforcing cords. In exemplary embodiments, the entire article may have a total sustainable content of 50% or greater, or even greater than 65%, for example, up to about 95% or greater in the article. According to one aspect, a belt is provided that includes an elastomeric body and at least one reinforcing cord disposed in the elastomeric body, wherein at least a portion of the elastomeric body is formed from a rubber composite comprising one or more Styrene Butadiene Rubber (SBR) sustainable polymers. According to another aspect, a rubber compound is disclosed that includes one or more natural rubber in a total amount of 30 phr to 70 phr, one or more SBR sustainable polymers in a total amount of 30 phr to 70 phr, one or more sustainable carbon blacks in a total amount of 25 phr to 150 phr, one or more dispersed sustainable reinforcing fibers in a total amount of 5 phr to 20 phr, optionally one or more antioxidants in a total amount of 1 phr to 10 phr, and optionally one or more activators in a total amount of 4 phr to 20 phr. In an exemplary embodiment, the rubber compound further comprises one or more sustainable plasticizer oils in a total amount of about 5 phr to about 20 phr, the one or more dispersed sustainable reinforcement fibers comprise cotton having an average size in the range of 2mm to 7mm, and the one or more sustainable carbon blacks have an average size in the range of 20 nm to 60 nm and are present in the rubber compound in a total amount of 75 phr to 150 phr. In an exemplary embodiment, the rubber compound further comprises one or more non-sustainable plasticizer oils in a total amount of 5 phr to 20 phr, the one or more dispersed sustainable reinforcement fibers comprise cotton having an average size in the range of 2 mm to 7mm, the one or more sustainable carbon blacks have an average size in the range of 60 nm to 100 nm and are present in