Этоксилированный триметилолпропан

Description

Ethoxylated trimethylolpropane is a trifunctional polyether polyol obtained by adding ethylene oxide units to the three hydroxyl groups of trimethylolpropane. Belongs to the class of low molecular weight polyester polyols, widely used as building blocks for cross-linked polymer networks. The three reactive terminal hydroxy groups make the molecule a trifunctional cross-linker, introducing branch points into the polymer structure. Unlike linear diols, such a trifunctional polyol does not form a chain, but a three-dimensional network, which directly determines the mechanical properties of the final polyurethane - rigidity, elasticity and resistance to residual deformation.

Basic Attributes

• CAS No: 50586-59-9
• Chemical formula: (C2H4O)n(C2H4O)n(C2H4O)nC6H14O3
• Molecular weight: 266.33
• Exact weight: 266.17293854
• EU number: 500-110-3

Physico-chemical characteristics

• Density: 1.14 g/ml at 25 °C
• Flash point: above 230°F (about 110°C)
• Refractive index: n20/D 1.478

Scope of application

The main area is the production of polyurethane foams, elastomers and sealants, where the trifunctional polyol acts as a cross-linking agent, defining a three-dimensional network structure. Used as a reactive diluent-comonomer in dental composites based on dimethacrylates, and also as a branching agent in the controlled radical polymerization of styrene by the ATRP method. In combination with lithium salts, for example lithium trifluoromethanesulfonate, it forms a polymer electrolyte used as a charge transfer medium in light-emitting electrochemical devices. The molecular weight varies depending on the degree of ethoxylation of trimethylolpropane: grades with an average molecular weight from 170 to 1014 and higher are commercially available, which allows you to select the cross-link density and flexibility of the final polymer for a specific formulation.

Safety Information

• Transport codes: NONH for all modes of transport - not classified as dangerous goods
• WGK Germany: 3
• Hazard class code: 36
• Safety instructions: 26
• Hazard Label: Xi (Annoyance)

Storage and transportation conditions

Store in a tightly closed container in a dry place at room temperature, away from open flame - flash point exceeds 230°F, but material remains flammable when heated for prolonged periods. The Xi mark requires avoiding contact with eyes and skin; In case of contact with eyes, rinse immediately with plenty of water (code S26). There are no special transport restrictions established according to the UN classification; transportation is carried out as for ordinary non-flammable industrial raw materials. The hygroscopicity of polyester polyols requires protection of the opened container from air moisture - excess moisture reduces the accuracy of dosing during subsequent reaction with isocyanates.