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The Allyl Polyoxyethylene Ether Methyl End Capping Makes Reaction More Efficient

September 22, 2026

In the synthesis of polyether-modified silicones (especially Si-C type), do you often encounter these issues?
Side reactions between terminal hydroxyl groups and siloxane bonds, leading to increased product viscosity?
Difficulty in increasing active content, resulting in poor storage stability?
Product hydrolysis and degradation under complex formulation systems or long storage requirements?

To address these industry pain points, Hangzhou Danwei Technology Co., Ltd. proudly presents—

Allyl Polyoxyethylene Ether Methyl End Capping

CAS No.: 27252-80-8
Structural Formula: CH₂=CHCH₂O(C₂H₄O)ₙCH₃

Why Choose Methyl-Capped?

Because the active hydrogen of the terminal hydroxyl group is replaced by a methyl group, the side reaction between hydroxyl groups and siloxane bonds is effectively eliminated during hydrosilylation. This core advantage delivers significant performance improvements:
Reduced product viscosity, increased active content
Significantly fewer side reactions, improved polyether-modified silicone quality
Better storage stability, especially suitable for long storage periods and complex formulation systems involving hydrolysis

Multiple Product Grades to Meet Different Needs

We offer products with various EO addition numbers and support customization:

MW360 7EO: Suitable for conventional foam stabilization and emulsification systems

MW500 10EO: Balanced hydrophilic-lipophilic properties

MW600 12EO: High hydrophilicity, suitable for special formulations

Customized: Flexible adjustment according to customer requirements

Wide Range of Applications

With its excellent performance, this product can be widely used in:

Packaging & Storage