The synthesis of alkyl carbamates from primary aliphatic amines and dialkyl carbonates in supercritical carbon dioxide
作者:Maurizio Selva、Pietro Tundo、Alvise Perosa
DOI:10.1016/s0040-4039(01)02390-5
日期:2002.2
130°C and in the presence of compressed CO2, primary aliphatic amines [RNH2, R=C10H21, C8H17, cHex, 1-(C10H7)CH2] react with organic carbonates (R′OCO2R; R′=Me, Et) to give alkyl carbamates (RNHCO2R′, 1). Although CO2 promotes the reaction also at a low pressure, good yields (∼80%) of 1 are achievable only with supercritical carbondioxide (scCO2) at 90 bar, which inhibits the formation of N-methylated
在130°C且存在压缩CO 2的情况下,伯脂肪族胺[RNH 2,R = C 10 H 21,C 8 H 17,cHex,1-(C 10 H 7)CH 2 ]与有机碳酸酯( R′OCO 2 R; R′= Me,Et)得到氨基甲酸烷基酯(RNHCO 2 R′,1)。尽管CO 2在低压下也能促进反应,但仅在90 bar的超临界二氧化碳(scCO 2)的情况下,才能达到1的良好收率(〜80%),这会抑制N-甲基化副产物的形成。
Adhesion-promoting system for rubber goods
申请人:Cytec Surface Specialties Germany GmbH & Co. KG
公开号:EP2253649A1
公开(公告)日:2010-11-24
The invention relates a mixture of a urethane-aldehyde resin UA prepared by condensation of an aldehyde A1 and an alkyl urethane U, and of a novolak PA, to a process for the preparation of the said mixture, and a method of use thereof as adhesion promoter in rubber goods.
本发明涉及一种由醛 A1 和烷基氨基甲酸酯 U 缩合制备的氨基甲酸酯-醛树脂 UA 与酚醛树脂 PA 的混合物,还涉及制备上述混合物的工艺以及将其用作橡胶制品增粘剂的方法。
PNEUMATIC TIRE
申请人:The Goodyear Tire & Rubber Company
公开号:EP3620308A1
公开(公告)日:2020-03-11
A pneumatic tire comprising a textile cord reinforced rubber component is disclosed. The rubber component comprises a textile cord contacting a rubber composition. The rubber composition comprises:
from 20 to 45 phr of a solution polymerized styrene-butadiene rubber having a bound styrene content ranging from 5 to 25 percent by weight, a vinyl-1,2 content ranging from 5 to 40 weight percent based on the butadiene content, and a Tg ranging from -85 to -50 °C;
from 55 to 80 phr of a polyisoprene rubber selected from the group consisting of natural rubber and synthetic polyisoprene rubber;
from 20 to 60 phr of a filler selected from carbon black, silica, and prehydrophobated silica;
from 1 to 10 phr of a resin selected from the group consisting of carbamic resins, alkyl phenol formaldehyde resins, and phenol formaldehyde resins; and
from 0.5 to 5 phr of a methylene donor.