TH33389B - The process for producing polyolefin foam is physically formed and insulating foam is prepared from polyolefin foam. - Google Patents

Abstract

The invention DC60 involves a process for the production of polyolefin-resistant foam. Temperature rise and composite polypropylene and / or polyethylene, in which the assembly process is combined with the first mixing and melting of one or more types of polyolefins which contain Range Melt was measured by differential scannyl calorie method at a heating rate of 10 ° C / min, within the range of 95 to 170 ° C, and a polyole may be selected. Other types of fin and / or additives To produce a homogeneous mixture whose melting temperature ranges from 120 to 160 degrees Celsius. As a homogeneous mixture in an extruder, the blending of the melted mix with an agent produces a foaming agent. Physical and subsequently cooling to such mixing so that the melted mixture is transferred from the cycle The liquid enters the semi-crystalline cycle, and the cold mix expands into the foam. Later invention In connection with foam insulation is produced with such a process. The invention involves a process for producing polyphenol foam, which is resistant to The temperature rises and is assembled too. Polypropylene and / or polyethylene Where the assembly process - combines with the first mixing and melting of one or more types of polyolefins whose range is Melt was measured by differential scannyl calorimetric method at a heating rate of 10 ํ / min within a range of 95 to 170 ํ, and a polyolefin may be selected. Other types and / or additives To form a homogeneous mixture whose melting temperature ranges from 120 to 160 ํ. As a homogeneous mixture in an extruder, the blending of the melted mix with an agent produces a foaming agent. Physical and subsequently cooling to such mixing so that the melted mixture is transferred from the cycle The liquid enters the semi-crystalline cycle, and the cold mix expands into the foam. Later invention In connection with foam insulation is produced with such a process.

Claims (9)

1.process for the production of polyolefin foam, which has a higher temperature resistance and Assembled with polypropylene and / or polyethylene, and in one or more options of Other polyolefins and / or one or more conventional plastic foam additives, consisting of a) the mixing and melting of polyolefins whose melting range is measured by trajectory. Way of Differential scannil calorie meter at a heating rate of 10 ํ / min in the range of 95 to 170 ํ or a mixture of one or more of the said polyolefins. And in an alternative way olefin species Other and / or additives to form a homogeneous mixture of one phase and Where the melting temperature was measured by the differential scannil calimetri method. At the giving rate The heat is 1 ํ / min. Equal to 120 to 160 ํ; b) Feeding of the homogeneous mixture was obtained in a) step into the extruder and heating. The mixture in one order of the extruder until it reaches an effective temperature for The melt of the mixture; c) the mixing of the molten mixture; b) in the second part of the extruder at increased pressure. With a foaming agent which contains a substance which means Fluid at temperature and pressure in the extruder, but which evaporates at reduced pressure; d) the cooling of the resulting mixture in c) cools to such temperature for transfer in the mix. Fused from a liquid to a semi-crystalline phase; And e) extrusion of the cold mixture occurs in d) through the extruder die, so that the mixture is extruded. It expands by evaporation of the agent to form foam to form polyolefin foam, and later to cool. Connect the foam until the outside temperature is reached. 2. Process according to claim 1, where mixing in step a) is performed in a joint massager. 3. Process according to claim 1 or item 2, in which the annealing range of the procedure a) temperature is defined as from 120 to 200 ํ. 4. Process according to Clause 1, 2 or Item 3. Which polypropylene has a range Melting ranges from 140 to 170 ํ are used as polyolefins with a melting range of 95 to 170 ํ. 5. Process according to either Clause 1,2 or Clause 3, in which the polypropylene range Melting ranges from 140 to 170 ํ are used as polyolefins with a melting range of 95 to 170 ํ, and polyethylene is used as another polyolefin. 6. Process in accordance with either Clause 1,2 or No. 3, in which polyethylene intermittent Melting in the range of 95 to 135 ounce is used as polyolefins. It has an internal melting range of 95 to 170 ํ and polyethylene is used as another polyolefin. 7. Process according to any of the preceding claims. Which is a foaming agent of Alkanes with carbon from 3 to 8 atoms are used. 8. Foam insulation consisting of a) polypropylene and / or polyethylene; b) flame retardant; And c) may choose one or more of the other polyolefins and / or one or more of Plastic additive - another type of foam, in which insulating foam is produced using the claim process. Any of the above 9. Foam insulation according to claim 8, which includes from 40 to 95% by weight of Polypropylene with a melting range of 140 to 170 ํ, 0 to 55% by weight of other polyolefins and up to 17% by weight of extinguishing agent and optional. Other additives 1 0. Foam insulation according to claim 8, which includes from 0 to 40% by weight of Polypropylene with a melting range of 140 to 170 ํ, 55 to 95% by weight of other polyolefins and up to 17% by weight of extinguishing agents and may choose additives. another