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Compositions containing purified non-Hevea rubber and related purification methods

A non-Hevea plant, non-Hevea technology for use in compositions containing purified non-Hevea rubber and related purification fields, capable of solving complex and necessary problems

Active Publication Date: 2015-03-04
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the process of extracting rubber from non-Hevea plants is often more complex and necessary than the process of gathering rubber from Hevea trees

Method used

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  • Compositions containing purified non-Hevea rubber and related purification methods
  • Compositions containing purified non-Hevea rubber and related purification methods
  • Compositions containing purified non-Hevea rubber and related purification methods

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0090] Example 1 (Purification of rubber from TKS plant matter)

[0091] As described in more detail herein, rubber was isolated and purified from samples of TKS harvested plant matter according to the following procedure. Crude TKS harvested plant matter was prepared by adding the harvested plant matter and toluene to an Erlenmeyer flask (the flask was stoppered after material addition to minimize any evaporation of the solvent) with stirring. Add to toluene at room temperature (plant matter added at a weight / volume ratio of 1:20 or 100 g harvested plant matter / 2000 mL toluene). TKS Harvested plant matter consists primarily of root material from rubber grass plants (the plants were about 2-3 years old at the time of harvesting) that are harvested and washed thoroughly with water to remove all visible dirt , and dry. (The washed and dried roots have been pebble-milled, sieved, and separated by a water-based flotation process to separate most of the cellulosic plant materia...

example 2

[0094] Example 2 - Preparation of Rubber Compound Using TKS Source Natural Rubber

[0095] To evaluate the effect of impurity levels on rubber compounds, rubber compounds were prepared using purified TKS source natural rubber with different impurity levels. (The abbreviation "TKS" is used to refer to rubber grass.) A rubber compound containing a commercially available Hevea source natural rubber was used as a control. The TKS source natural rubber denoted below as "Compounded TKS" was obtained from a sample of harvested TKS purified using the procedure described in Example 1 above. The TKS source natural rubber denoted below as "harvested TKS" was a sample provided by the Ohio State University Agricultural Research and Development Center; methods used to purify the harvested TKS included passing water Flotation Pebble milling, sieving and separation (more precise details not available). Each natural rubber source was found to contain the amounts listed in Table 1 below. R...

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Abstract

Provided herein are organic solvent-based processes for the isolation of purified natural rubber from non-Hevea plants. The processes are particularly useful with plant matter that comprises at least 90% by weight roots sourced from Taraxacum kok-saghyz (Russian dandelion), Scorzonera tau-saghyz (Tau-Saghyz), Scorzonera uzbekistanica, and combinations thereof. Also provided herein is a purified non-Hevea rubber product containing 100 phr of rubber sourced from Taraxacum kok-saghyz, Scorzonera tau-saghyz, Scorzonera uzbekistanica, and combinations thereof, having a specified purity level. Additionally provided are sulfur-vulcanizable rubber compounds and sulfur-vulcanized rubber compounds that incorporate 10-100 phr of purified non-Hevea rubber product sourced from Taraxacum kok-saghyz, Scorzonera tau-saghyz, Scorzonera uzbekistanica, and combinations thereof, having a specified purity level.

Description

[0001] Cross References to Related Applications [0002] This application claims a U.S. provisional patent entitled "COMPOSITIONS CON TAINING PURIFIED NON-HEVEA RUBBER AND RELATED PURIFICATION METHODS" filed May 16, 2012 Priority and any other benefit to Application Serial No. 61 / 647,778, the entire disclosure of which is incorporated herein by reference. Background technique [0003] The Hevea plant or tree (also known as Hevea brasiliensis or rubber tree) is a well known source of natural rubber, also known as polyisoprene. Rubber sources such as Hevea brasiliensis, Banyan (Hevea india) and Cryptostegia grandiflora (Gum vine of Madagascar) produce natural rubber in the form of sap in which the rubber is suspended in a free-flowing aqueous solution, so The sap can be recovered by cutting the pulp of the plant. Various non-hevea plants are also known to contain natural rubber, but their rubber is stored in individual cells of the plant (such as stems, roots, or leaves) and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C1/00C08C1/04C08L7/00B01D11/02
CPCC08L7/00C08C1/00C08C1/04B01D11/0288Y02W30/62B01D11/02C08C2/06C08K3/00C08C2/02
Inventor 艾米·兰德尔A·O·国真
Owner BRIDGESTONE CORP
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