Flame-retardant polyurethane modified polyisocyanurate foam, and preparation method and application of foam

Abstract

The invention belongs to the field of high molecular materials, and relates to polyurethane foam, and a preparation method and an application of the polyurethane foam, in particular to flame-retardant polyurethane modified polyisocyanurate foam, and a preparation method and an application of the flame-retardant polyurethane modified polyisocyanurate foam. The flame-retardant polyurethane modified polyisocyanurate foam comprises the following components in parts by mass: 100 parts of polyol, 1.5-12.0 parts of composite catalyst, 0.1-3.0 parts of foam stabilizer, 10-50 parts of foaming agent, 30-100 parts of composite flame retardant, and 200-600 parts of isocyanate. With the adoption of the preparation method, a finished product with uniform and consistent aperture size and foam density can be prepared, and the synthesis preparation method is simple, can be applied to both manual foaming and spray forming, and facilitates scale production and application. The polyisocyanurate foam, the preparation method and the application have the advantages that the heat conductivity coefficient is kept less than 25mW / m*K; a foam combustion limit oxygen index (OI) is greater than or equal to 33 and a smoke density ratio (SDR) is less than 15; and the frequent problem that the smoke density ratio is increased synchronously due to the increase of the formula foam oxygen index as an organic flame retardant is only adopted in the prior art is overcome.

Description

technical field [0001] The invention relates to a polyurethane foam and its preparation method and application, in particular to a flame-retardant polyurethane modified polyisocyanurate foam, its preparation method and application, and belongs to the field of polymer materials. Background technique [0002] Since the birth of polyurethane foam materials, especially in recent decades, a variety of polyether or polyester polyols and organic functional isocyanates have been developed, based on polyurethane soft and hard foams prepared by foaming components containing active hydrogen atoms and isocyanate reactive components. High-quality foam, because of its low thermal conductivity, low density, and easy on-site processing and forming, has been used in building insulation, energy-saving engineering, vehicle manufacturing and interior decoration, industrial pipelines, cold storage and refrigerators and other related thermal insulation technology fields. Wider and wider applicati...

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Problems solved by technology

The flame retardant effect obtained by using halogen-containing and phosphorus-containing organic flame retardants in the PIR foam synthesis formula is relatively significant, but there are problems such as poor combustion smoke suppression effect, high smoke density, and high smoke toxicity, while inorganic flame retardants are used. Usually the formulation is used in a large amount, the mixing stability of the inorganic flame retardant and the polyol component and the uniformity of the foam product are poor, and the powder fineness of the inorganic flame retardant has a significant impact on the combustion oxygen index and mechanical properties of the final foam product influences

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