Composition for rigid polyurethane foam and application thereof

Abstract

The invention discloses a composition for rigid polyurethane foam. The polyurethane foam is prepared from the following components in parts by weight: 3 to 5 parts of polyether polyol A, 2 to 4 partsof polyether polyol B, 2 to 4 parts of polyester polyol C, 0.1 to 0.5 part of foam stabilizer, 0.1 to 0.3 part of pore opening agent, 0.2 to 0.6 part of catalyst, 0.2 to 1.0 part of water and 1 to 3 parts of flame retardant. The preparation method can be used for preparing the rigid polyurethane foam, and comprises the following steps: mixing the composition for the rigid polyurethane foam with isocyanate, and pouring the mixture into a foaming reaction mold for foaming reaction molding. The rigid polyurethane foam is of an open-cell structure, the foam density is larger than or equal to 30 kg / m < 3 >, the compressive strength is larger than or equal to 100 kPa, the aperture ratio is larger than or equal to 80%, the flame retardant property reaches the DIN 4102 B2 level, and the rigid polyurethane foam has good heat preservation performance and voice absorption performance and can be used for preparing plates with voice absorption performance.

Description

technical field [0001] The invention relates to a composition for rigid polyurethane foam, a rigid polyurethane foam prepared by foaming the same, and an application thereof, which belong to the technical field of chemical synthesis. Background technique [0002] Rigid polyurethane foam is an organic material with excellent performance, which has the advantages of low density, high strength, and excellent thermal insulation performance; it is widely used in construction, cold chain, thermal insulation and other fields. Rigid polyurethane sheet is a composite material consisting of two layers of metal panels or other material panels bonded with rigid polyurethane foam. The outer layer of the polyurethane sheet is a metal panel with a waterproof coating, and the inner layer can be any material, such as color steel plate, aluminum foil, non-woven fabric, etc. Polyurethane board has high overall strength, strong bearing capacity, and excellent thermal insulation performance. It...

AI Technical Summary

Problems solved by technology

Polyurethane foam is a porous material. The existing polyurethane foam for boards has a closed-cell structure. Although it has better thermal insulation performance, it will increase the noise pollution inside the factory building.

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