groups of silicon-containing alkenes is reported. It includes a highly regioselective functionalization of 1,5-hexadiene through hydrosilylation and dehydrogenative silylation with organofunctional silanes and siloxanes. The established conditions enable selective monofunctionalization of 1,5-hexadiene regardless of the organosilicon modifier used as well as the type of functional group bonded to the silicon-based
An asymmetric organomodified disiloxane surfactant having the formula:
MM′
wherein M comprises branched hydrocarbon substituents and M′ comprises a cationic, anionic or zwitterionic substituent and a polyether substituent that may be combined as one moiety, wherein the disiloxane surfactant has an enhanced resistance to hydrolysis between a pH of about 3 to about 12.
A surfactant mixture comprising
a) an asymmetric organomodified disiloxane surfactant having the formula:
MM′
wherein M comprises branched hydrocarbon substituents and M′ comprises a cationic, anionic or zwitterionic substituent and a polyether substituents that may be combined as one moiety; and
b) an additional component selected from the group consisting of agricultural components, coating components, personal care components, home care components, oil or gas treating components, water processing components and pulp or paper treating components;
c)
wherein the mixture has an enhanced resistance to hydrolysis between a pH of about 3 to about 12.
一种表面活性剂混合物,包括a) 公式为 MM′ 的不对称有机改性二硅氧烷表面活性剂,其中 M 包含支链碳氢取代基,M′ 包含阳离子、阴离子或双电离取代基以及可能组合为一个基团的聚醚取代基;和 b) 从农业成分、涂料成分、个人护理成分、家居护理成分、油气处理成分、水处理成分和纸浆或纸张处理成分组成的另外组分;c) 其中该混合物在 pH 约为 3 到 12 之间具有增强的抗水解性。
Compositions comprising an asymmetric disiloxane surfactant composition comprising a silicone composition comprising a silicone having the formula:
MM′
where M or M′ comprises an alkylpolyalkyleneoxide bearing substituent selected from the group consisting of:
R
13
(C
2
H
4
O)
a
(C
3
H
6
O)
b
(C
4
H
8
O)
c
R
14
and
R
12
SiR
5
R
6
(R
13
(C
2
H
4
O)
a
(C
3
H
6
O)
b
(C
4
H
8
O)
c
R
14
)
that exhibit resistance to hydrolysis over a wide pH range.
SELECTIVE HYDROSILYLATION RHODIUM CATALYST METHOD AND PRODUCT
申请人:Farris David D.
公开号:US20080076939A1
公开(公告)日:2008-03-27
An asymmetric siloxane is made by reacting a silicone having the formula M
H
D
x
M′
H
where M
H
is R
1
R
2
HSiO
1/2
, M′
H
is R
4
R
5
HSiO
1/2
and x is an integer
0
≦x≦10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.