Polystyrene foamed plastic and preparation method thereof, and composite board prepared from polystyrene foamed plastic

Abstract

The invention discloses a polystyrene foamed plastic and a preparation method thereof, and a composite board prepared from the polystyrene foamed plastic. The invention is characterized in that the polystyrene foamed plastic is prepared by carrying out uniform mixing and steam pressurization or mold extrusion or high-pressure permeation polymerization on the following raw materials in parts by weight: 20-40 parts of expandable polystyrene material and 2-6 parts of inorganic MUEC colloidal liquid. The preparation method comprises the following steps: adding the expandable polystyrene beads into a prefoaming machine, prefoaming, drying, forming by coating drying and steam pressurization polymerization or coating and mold extrusion polymerization or steam pressurization and high-pressure permeation polymerization, and cutting the formed block into boards with various sizes by a cutting apparatus. An outer side protective layer (2) is attached to one surface of the polystyrene foamed plastic board, and a finishing coat (3) is attached to the outer side protective layer (2), thereby constituting the composite board; and the composite board is manufactured by one step in the factory. The board and composite board have the advantages of low inflammability, high heat resistance, high compression strength, low apparent density, low water absorptivity, favorable dimensional stability, sound insulation, aging resistance and environment friendliness.

Description

Technical field: [0001] The invention relates to the technical field of building thermal insulation building materials, in particular to a preparation method of polystyrene foam plastic and a composite board made of it. Background technique: [0002] At present, building energy consumption accounts for 12%-20% of the national energy consumption. With the average annual economic growth rate of 7-8%, energy consumption is also growing at a figure of 2.8%-4%. Building energy consumption will account for 30% --- 35%, building energy saving is one of the effective ways to reduce energy consumption. The energy loss of existing houses is roughly as follows: walls account for about 50%; roofs account for about 10%; doors and windows account for about 25%; basements and grounds account for about 15%. an important part of the rate. [0003] The application of building external insulation materials has basically gone through several stages such as polystyrene board-extruded board-pol...

AI Technical Summary

Problems solved by technology

[0003] The application of building external insulation materials has basically gone through several stages such as polystyrene board-extruded board-polyurethane-phenolic-A-grade insulation board, among which polystyrene board has a market share of 90%, and polyurethane 10%. In terms of construction difficulty, organic thermal insulation materials have certain advantages, especially polyurethane. When the apparent density is 35-40Kg / m3, the thermal conductivity is only 0.02-0.024W / (m.k); Accidents occur from time to time, so the fire resistance of organic thermal insulation materials has been questioned, so new products such as modified phenolic boards, foamed cement boards, foamed glass boards, rock wool boards, and vacuum boards have emerged as the times require. The technical process is not very mature, brittle, high thermal conductivity, high density, low strength, high water absorption, difficult construction, high price, construction is obviously affected by climate and other hard conditions, which limit its market share, such as vacuum board, Its thermal conductivity is extremely low, and its thickness is only about 1cm. It is a very good thermal insulation material for external walls in theory; but in practical applications, it is prone to hollowing, air leakage, non-puncture, high apparent density, and poor adhesion. Flaws affect the vacuum board market; with the emergence of modified polystyrene boards, the market demand is increasing, and modified polystyrene boards have begun to stand out in the market, but product quality and performance vary, and most of them are difficult to achieve A2 fire protection Requirements, the fire protection and thermal insulation properties of the product have not been qualitatively changed

Images