Claims
- 1. A modified natural rubber obtained by a modification of a deproteinized natural rubber having a nitrogen content of less than 0.10% by weight; wherein said modification is either of:A) graft copolymerizing said deproteinized natural rubber with 2-hydroxyethyl methacrylate, said modified natural rubber having a graft efficiency of 62.7% or more; or B) epoxidizing said deproteinized natural rubber with trifluoroperacetic acid, wherein an epoxidation rate is sufficient to produce a modified deproteinized natural rubber having an epoxidation ratio of 26.0% or more in 5 hours.
- 2. A modified natural rubber obtained by a modification of a deproteinized natural rubber having a nitrogen content of less than 0.10% by weight; wherein said modification is a graft copolymerization of said deproteinized natural rubber with methyl methacrylate in the presence of t-butyl hydroperoxide, and tetraethylenepentamine, said modified natural rubber having a graft efficiency of 62.7% or more.
- 3. A modified natural rubber obtained by a modification of a deproteinized natural rubber having a nitrogen content of less than 0.10% by weight; wherein said modification is an epoxidation of the deproteinized natural rubber with hydrogen peroxide and formic acid or glacial acetic acid, wherein an epoxidation rate is sufficient to produce a modified deproteinized natural rubber having an epoxidation ratio of 26.0% or more in 5 hours.
- 4. A modified natural rubber obtained by a modification of a deproteinized natural rubber having a nitrogen content of less than 0.10% by weight; wherein said modification is a graft copolymerization of said deproteinized natural rubber with styrene in the presence of t-butyl hydrperoxide, and traethylenepentamine, said modified natural rubber having a graft efficiency of 62.7% or more.
Parent Case Info
This application is a continuation of Ser. No. 08/448,890 filed May 24, 1995 now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0584597 |
Mar 1994 |
EP |
2098222 |
Nov 1982 |
GB |
Continuations (1)
|
Number |
Date |
Country |
Parent |
08/448990 |
May 1995 |
US |
Child |
08/941132 |
|
US |