Arquivamento - Art. 36 §1° da LPI
#11.2
05/09/2000
RPI 1531
Application data
Number
PI9203478Type
Filing
Publication
The application was abandoned: the INPI technical office action was not answered in time (art. 36 of the Brazilian IP Act). The technology is in the public domain in Brazil.
Talk to a specialistLatest action published by the INPI: 05/09/2000. We update with every new RPI gazette, published weekly.
Applicants
Sumitomo Bayer Urethane Co., Ltd.
JP
Inventors
T. I. (pessoa física)
JP
IPC Classification
Priority claims
JP
227898.91 · 09/09/1991
Abstract
A presente invenção apresenta um método para impedir a coloração de um composto de isocianato aromático, caracterizado pelo fato de um éster de fosfito orgânico da fórmula (vide fórmula): onde R^ 1^ , R^ 2^ , R^ 3^ e R^ 4^ são, iguais ou diferentes, um grupo hidrocarbono C~ 4-20~, 2,6-di-terc.-butil-4-metilfenol e trifenil fosfito serem adicionados ao composto de isocianato aromático.
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