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BlueSky Chemical D-34 Crosslinking Agent

BlueSky Chemical D-34 Crosslinking Agent is oxime silane-based crosslinkers for producing neutral moisture-curing silicone sealants. Using these silane compounds, hydroxyl-functionalized silicone polymers are crosslinked to obtain a silicone elastomer under the effect of a catalyst and moisture. When using D-34, no acetic acid or amine is released in contrast to acid or alkaline cross- linking systems, but methyl ethyl ketoxime. As this cleavage product reacts neutrally, sealing compounds based on crosslinker oxime can be used even on sensitive substrates such as marble. D-34 is a clear colorless to pale yellow fluid with a typical smell (MEKO).The product readily hydrolyzes upon contact with moisture.

Functions: Crosslinking Agent

Chemical Family: Silanes

Enhanced TDS

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Chemical Family

Silanes

CASE Ingredients Functions

Crosslinking Agent

Technologies

CASE Ingredients

Product Families

CASE Ingredients — Monomers & Intermediates

Chain Extenders & Crosslinkers

Structural Formula

BlueSky Chemical D-34 Crosslinking Agent - Structural Formula

Applications & Uses

Markets

Adhesives & Sealants

Applications

Adhesives & Sealants — Other Adhesives & Sealants Applications

Compatible Substrates & Surfaces

Metal

Application and Performance
  • Be used as a cross-linking agengt for RTV.
  • D-34 is often the main crosslinker of choice for oxime silicone sealants and can be used by itself or in combination with other oximesilanes to provide the sealant with targeted properties (such as desired cure rate, adhesion, etc). In contrast to acidic or basic curing systems, no acidic acid or amine, but 2-butanoneoxime is liberated during application.
  • Due to the neutral character of 2-butanoneoxime, sealants based on D-34 can be applied even on (corrosion) sensitive substrates like metals or marble.

Properties

Physical Form

Liquid

Appearance
Colorless or Lightly Yellow Transparent
Typical Properties
ValueUnitsTest Method / Conditions
Density (25°C)1.033g/ml-
Di-substituted Content45.0 - 55.0％-
Mono-substituted Content35.0 - 45.0%-

Technical Details & Test Data

Reactivity

D-34 readily undergoes hydrolysis upon contact with moisture. D-34 are liquid raw materials for neutral condensation curing silicone sealants. In the presence of a (tin) catalyst these silanes react with hydroxyfunctional silicone polymers; exposure to moisture results in the formation of crosslinked, elastomeric silicones.

Storage & Handling

Product Handling and Storage

The “Best use before end” date of each batch is shown on the product label. Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.