Method for the preparation of organopolysiloxanes having (METH)acrylate functions
A polysiloxane, acrylate-based technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve discomfort, yield and selectivity Problems to be improved, unpleasant odors, etc., to achieve the effect of improving yields, improving health and safety conditions, limiting the risk of equipment blockage
Pending Publication Date: 2019-05-21
ELKEM SILICONES FRANCE SAS
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- Description
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- Application Information
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Problems solved by technology
However, the yield and selectivity of this method could be improved
Furthermore, compositions comprising organopolysiloxanes with acrylate functionality obtained according to the teaching of patent EP1276825 have an unpleasant odor which is unpleasant for users of these compositions
Method used
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[0150] 1 - Preparation of compositions comprising organopolysiloxanes containing acrylate groups
[0151] Into a 250 ml reactor equipped with magnetic bar stirring, condenser, air inlet and thermostat jacket was added the following with stirring:
[0152]- 130 g of polydimethylsiloxane oil H functionalized with epoxy groups, with a dynamic viscosity of about 60 mPa.s at 25°C. This oil comprises a hydrocarbyl group Y comprising an epoxy group of the following formula (R-4):
[0153]
[0154] (R-4)
[0155] The molar content of epoxy groups in oil H is 232mmol / 100g, which is equivalent to 2-15 epoxy groups per molecule;
[0156] - 25g of acrylic acid,
[0157] - 0.086 g chromium III acetate,
[0158] -0.039g hydroquinone methyl ether (MEHQ), and
[0159] - Variable amount of solvent (see Table 1).
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Abstract
Description
technical field [0001] The present invention relates to a process for the preparation of organopolysiloxanes functionalized with (meth)acrylate groups, preferably acrylate groups. Throughout this document, it is understood that (meth)acrylate groups include acrylate groups, methacrylate groups, or a mixture of both. Background technique [0002] These (meth)acrylate functionalities are present in the hydrocarbyl groups bonded to the polysiloxane chain via Si-C bonds, which may be present in the chain or at the chain ends. These (meth)acrylate functional groups are capable of reacting via a free-radical route upon actinic and / or thermal activation according to a polyaddition polymerization mechanism. [0003] These organopolysiloxanes with (meth)acrylate functionality are widely used in silicone compositions crosslinkable via the free radical route for the production of elastomers, optionally in thin layers The form is coated on a flexible support made of the following subs...
Claims
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IPC IPC(8): C09D183/06C08F299/08C08G77/08
CPCC08F299/08C09D183/06C08G77/08C08G77/14C08G77/20B01J31/22B01J2531/0208B01J2531/62C08G77/38C08L83/06C08L2312/06
Inventor C·马利维尔尼H·巴奇尔
Owner ELKEM SILICONES FRANCE SAS