Foam composition, polyurethane plastic, and preparation method and application of polyurethane plastic

Abstract

The invention provides a foam composition, a polyurethane plastic, and a preparation method and application of the polyurethane plastic. The foam composition is prepared from the following components in parts by weight: 70 to 90 parts of polyalcohol composition, 1 to 12 parts of composite catalyzing additive, 1 to 3 parts of water, and 1 to 1 parts of foaming agent HFC-245fa. The polyurethane plastic comprises isocyanate and the foam composition according to a mass ratio of (1.2 to 1.35):1, and is used for manufacturing sheets, heat-insulation containers, heat-insulation building outer walls and filling rolling gates. The prepared polyurethane plastic has the advantages that the fluidity is good, the foam strength is high, the binding force with substrate is high, the environment-friendly effect is realized, the appearance core density of foam reaches 41.2kg / m<3> or above, the compression strength reaches 201KPa or above, the fluidity index reaches 10 or above, the adhering force reaches 2.8kgf or above, and the foam property is excellent. The prepared polyurethane plastic is used for manufacturing the sheets, the heat-insulation containers, the heat-insulation building outer walls and the filling rolling gates.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a foam composition, a polyurethane plastic and a method for preparing and using the polyurethane plastic. Background technique [0002] Polyurethane (referred to as PU) is a polymerization made of polyisocyanate and polyether polyol or polyester polyol or / and small molecule polyol, polyamine or water and other chain extenders or crosslinking agents. Technical indicators are composed of polyether monomer, foam stabilizer, crosslinking agent, catalyst, foaming agent and other components. By changing the type and composition of raw materials, the shape and performance of the product can be greatly changed, and the final product can be obtained from soft to hard. The forms of polyurethane products include soft, semi-rigid and rigid foam plastics, elastomers (polyurethane elastomers are referred to as TPU), paint coatings, adhesives, sealants, synthetic leather coating res...

AI Technical Summary

Problems solved by technology

Yet this invention has the following problems: with CO 2 That is, full water foaming is used as a foaming agent, which has a high thermal conductivity, but its application range is limited, and it is generally only used in pipeline insulation and other fields; in addition, the use of polyester rigid foam obtained by full water foaming and substrate Cohesion, fluidity and foam strength are not high enough

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