A kind of low-temperature foaming aid and preparation method thereof

Abstract

The invention provides a low temperature blowing promoter and a preparing method thereof. The low temperature blowing promoter comprises a component A and a component B, wherein by weight, the component A comprises 140 to 200 parts of potassium chloride, 80 to 120 parts of sodium borate and 180 to 250 parts of DOPT plasticizer, and the component B comprises 350 to 450 parts of zinc chloride, 80 to 120 parts of sodium bicarbonate, 35 to 50 parts of titanate coupling agents and 280 to 350 parts of DOPT plasticizer. The preparing method for the low temperature blowing promoter comprises the steps that the component A is mixed and steeped for one hour according to the proportions, and then primary grinding is carried out for eight hours; then, the component B is poured in and mixed evenly, then fine grinding is carried out for six hours at room temperature; and a product is obtained after fineness detection is carried out. The low temperature blowing promoter has the advantages of being good in dispersity and gentle in decomposition in the heat, effectively lowering PVC foaming temperature, increasing cell evenness, thickening bubble walls, reducing the using amount of the plasticizer and the like.

Description

technical field [0001] The invention relates to a foaming aid, in particular to a low-temperature foaming agent capable of reducing the foaming temperature of PVC and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) foam material is a new type of material that has developed rapidly in recent years. It is usually coated or pasted on the surface of the fabric, then heated to make it plasticized, and rolled flattened or embossed. Get PVC faux leather. PVC artificial leather is similar to natural leather. It has the advantages of light texture, convenient processing, water resistance and wear resistance, etc. It is widely used in clothing, shoes and hats, bags, furniture, automotive interiors and other fields. [0003] PVC foam molding is divided into three processes: the formation of the bubble core, the expansion of the bubble core and the curing of the foam body. The expansion of the bubble nucleus has a decisive influence on the cells of...

AI Technical Summary

Problems solved by technology

Among them, organic foaming agents include azo compounds, nitroso compounds, sulfonyl hydrazide compounds, azide compounds, diazo compounds, etc., which are prone to generate nitrogen and a small amount of carbon dioxide, carbon monoxide, ammonia and other gases under the action of heat to cause Foaming effect, has the advantages of narrow decomposition temperature range and good dispersion in polymers; but the disadvantage is high decomposition temperature and fast decomposition and degassing speed

Under high temperature, PVC accumulates a large amount of internal heat, resulting in local damage or even scorching of PVC foam, and the instantaneous generation of a large amount of gas will cause PVC cells to collapse or merge, seriously reducing the quality of PVC foam materials

Inorganic foaming agents include ammonium carbonate, ammonium bicarbonate, and sodium bicarbonate, etc., which easily generate carbon dioxide under the action of heat to cause foaming, and have the advantages of low cost, non-toxic, and low decomposition temperature; but the disadvantage is the speed of decomposition and degassing slow, reducing productivity