KR920017813A - Composite composed of upper layer and base layer of thermoplastic polyurethane, method for producing same and use thereof - Google Patents

Abstract

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Description

Composite composed of upper layer and base layer of thermoplastic polyurethane, method for producing same and use thereof

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Claims (10)

(A) an upper layer, a structure such as an elastic foamed polyurethane sheet composed of thermoplastic polyurethane, and (B) a base layer, (Ba) at least one essentially linear polyester or poly having a molecular weight of 600 to 3000 1 mole of esterol, (Bb) 6 to 15 moles of organic diisocyanate and (Bb) 5 to 14 moles of one or more alkanediols or dialkylene glycols, (Bd) the total weight of components (Ba) to (Bc) For composites made from thermoplastic polyurethane elastomers prepared by reacting in the presence of 0.05 to 0.3% by weight of water. 2. The composite according to claim 1, wherein the thermoplastic polyurethane elastomer (B) is prepared in the presence of a (Be) catalyst and, if desired, (Bf) adjuvants and / or additives. The method of claim 1, wherein the thermoplastic polyurethane elastomer (B) has a molecular weight of (Ba) 600 to 3000, one mole of at least one essentially linear polyadipic acid rolyalkylene glycol or polyoxy tetramethylene glycol, ( Bb) 6 to 15 moles of diisocyanic acid 4 to 4 moles of 4'-diphenylmethane and 5 to 14 moles of (Bc) 1, 4-butanediol, relative to the total weight of the components (Ba) to (Bc), 0.05 To 0.3 part by weight in the presence of water, thereby producing a composite. The process according to claim 1, wherein in the preparation of the thermoplastic polyurethane elastomer (B), the equivalent number of NCO groups of the organic diisocyanate (Bb) versus polyesterol or polyetherol (Ba) and alkanediol or dialkylene glycol ( Bc) the composite of the total number of hydroxyl groups of 0.85: 1 to 1.1: 1. The composite according to claim 1, wherein the thermoplastic polyurethane elastomer (B) has a density of 0.95 to 1.1 g / cm 3 and a stiffness of 400 to 2000 N / mm 2. 2. The composite according to claim 1, wherein the structure A, such as an elastic foamed polyurethane sheet made of thermoplastic polyurethane, has a smooth, essentially void free surface on one side. The structure (A) according to claim 1, wherein the structure (A), such as an elastic foamed polyurethane sheet composed of thermoplastic polyurethane (A), is (i) at least one powdered thermoplastic polyurethane (A) and (ii) 23 ° C. at high temperatures. Composite, characterized in that it is prepared by sintering a mixture containing at least one blowing agent which is a solid. The structure (A), such as an elastic foamed polyurethane sheet, comprising a thermoplastic polyurethane, has a thickness of 0.1 to 25 mm, and (i) 50 to 350 at a weight of 190 ° C. and 212 N (21.6 Kp). One or more powdered thermoplastic polyurethanes (A) and (ii) azoisobutyronitrile, azodicarbonamide, diphenylsulfon disulfo hydrazide having a melt flow index (MFI) and Shore A repulsion hardness of 60 to 98 and And a mixture containing at least one blowing agent powdered at 23 ° C. selected from the group consisting of 4,4′-oxybis (benzenesulfohydrazide) at 180-280 ° C. using a mold. A method of producing a composite made from a thermoplastic polyurethane elastomer using a mold, as (A) an upper layer, a structure such as an elastic foamed polyurethane sheet made of thermoplastic polyurethane, and (B) a base layer, comprising: A prepolymer obtained by reacting at least one essentially linear polyesterol or polyether (Ba) with a molecular weight of from 3000 to 6 to 15 moles of organic diisocyanate (Ba) and containing NCO groups, To 14 moles of one or more alkanediols or dialkylene glycols (Bc), 0.05 to 0.3% by weight, and, if necessary, catalysts (Be), auxiliaries and / or the total weight of components (Ba) to (Bc) Or a liquid reaction mixture (B) prepared by mixing with a mixture containing addition (Bf) in such a way that the upper layer (A) is brought into contact with the reaction mixture in terms of facing the mold cavity. Was introduced, the method comprising as to seal the mold and, curing the reaction mixture, demolding the resulting composite on. Use of the composite according to claim 1 as a vehicle shock absorbing accessory, preferably an instrument panel for a motor vehicle. ※ Note: The disclosure is based on the initial application.