Alkane foaming B1-grade flame-retardant polyurethane rigid foam and preparation method thereof

The invention discloses alkane foaming B1-grade flame-retardant polyurethane rigid foam and a preparation method thereof. Alkane is adopted as a foaming agent, polyether/polyester polyol with a specific flame-retardant effect, a catalyst, a foam stabilizer, a flame retardant, other special assistants and the like are matched to prepare combined polyether, and the combined polyether reacts with polyisocyanate to generate high-index PIR foam. The B1 flame-retardant polyurethane rigid foam disclosed by the invention is mainly suitable for a continuous line production process, and has the advantages of high flame retardance, environmental protection, low density, high production tolerance, excellent foam performance and the like compared with other types of PIR plate foam. 本发明公开了一种烷烃类发泡B1级阻燃聚氨酯硬质泡沫及其制备方法，采用烷烃作为发泡剂，配以特定阻燃作用的聚醚/聚酯多元醇、催化剂、泡沫稳定剂、阻燃剂及其它特殊助剂等制备成组合聚醚，并与多异氰酸酯反应生成高指数的PIR泡沫。本发明中的B1阻燃聚氨酯硬质泡沫主要适用于连续线生产工艺，与其它的PIR板材泡沫相比，具有高阻燃、环保、密度低、生产宽容度高，泡沫性能优异等优点。