Polyurethane for Filament Winding

Patent Title: FILAMENT WINDING PROCESSES USING POLYURETHANE RESINS AND SYSTEMS FOR MAKING COMPOSITES

 Number/Link: W2016183073

Applicant/Assignee: Covestro

Publication date: 17-11-2016

Gist”: Compositions comprising polymeric MDI, amine-initated polyethers and natural oil polyols are useful for filament winding

Why it is interesting: Filament winding is a process for the production of hollow composite structures whereby resin-impregnated fibers are wound on a mandrel and then cured. Typically the fibers are impregnated with polyesters or epoxies.  Polyurethane compositions are difficult to use in this process because of reactivity and moisture sensitivity. According to this invention an isocyanate reactive composition comprising at least 50% high functionality amine-initiated polyether polyols and up to 50% of a hydrophobic OH-functional vegetable oil, can be advantageously used for PU filament winding. In the examples blends of 3 and 4-functional amine-initated polyether polyols with mole weight of about 250, castor oil, or OH-functional soy-oil, are used together with a high 2,4′ polymeric MDI.

Filanent winding process

Filanent winding process

Leave a comment

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s