LOW-MOLECULAR WEIGHT NATURAL RUBBER - MITSUBISHI GAS CHEMICAL CO

Title:

LOW-MOLECULAR WEIGHT NATURAL RUBBER

Document Type and Number:

Japanese Patent JP2007277450

Kind Code:

A

Abstract:

To obtain a low-molecular weight natural rubber useful as a raw material for adhesives, sealants, caulking agents, plasticizers, polyelectrolyte materials, polyurethanes, etc.

The low-molecular weight natural rubber is obtained by reacting a natural rubber latex by light irradiation in the presence of a titanium dioxide photocatalyst and hydrogen peroxide to effect oligomerization. The low-molecular weight natural rubber thus obtained has hydroxy group on its molecular end while retaining its double bonds and contains no residues left that are problematic in the final product's color and various physical properties, and has an intrinsic viscosity of 3-0.2 dL/g.

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Inventors:

TANAKA YASUYUKI
SAKDAPIPANICH JITLADDA
KAWAHARA NARIMOTO
KONDO OSAMU
TSUNODA MINORU
HAMAGUCHI TAKAYOSHI
KURATA HIROSHI

Application Number:

JP2006107383A

Publication Date:

October 25, 2007

Filing Date:

April 10, 2006

Export Citation:

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Assignee:

MITSUBISHI GAS CHEMICAL CO
UNIV NAGAOKA TECHNOLOGY
MAHIDOL UNIV

International Classes:

C08C19/08

Attorney, Agent or Firm:

Takashi Nagai

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