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Thermoplastic polyurethane resin composition for plated dual molding, dual-molded article for plating, plated dual-molded article, and their production methods

A thermoplastic polyurethane and resin composition technology, applied in coating, liquid chemical plating, metal material coating process, etc., can solve the problems of unclear characteristics, such as the relationship between plating treatment resistance and resistance, and achieve the effect of inhibiting discoloration

Inactive Publication Date: 2011-03-02
NIPPON POLYURETHANE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermoplastic polyurethane resins disclosed in Document 2 are used to obtain keyboards with excellent overmolding properties, oleic acid resistance, weather resistance, and transparency, and the correlation between their characteristics and resistance to plating treatment is not clear

Method used

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  • Thermoplastic polyurethane resin composition for plated dual molding, dual-molded article for plating, plated dual-molded article, and their production methods
  • Thermoplastic polyurethane resin composition for plated dual molding, dual-molded article for plating, plated dual-molded article, and their production methods
  • Thermoplastic polyurethane resin composition for plated dual molding, dual-molded article for plating, plated dual-molded article, and their production methods

Examples

Experimental program
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Effect test

Embodiment 1、2 and comparative example 1～3

[0067]

[0068] In Example 1, a thermoplastic polyurethane resin composition was obtained in the following manner. That is, 857.3 parts of polyol D and 142.7 parts of 1,4-BD were added to a mixing tank, followed by mixing, thereby obtaining a polyol premix. The temperature of the resulting polyol premix was then adjusted to 75°C. On the other hand, HDI was charged in another mixing tank, and then the temperature was adjusted so that the temperature was 50°C.

[0069] Next, the polyol premix and HDI were charged into a twin-screw extruder (manufactured by Ikegai Co., Ltd.). In addition, the temperatures in the vicinity of the hopper of the twin-screw extruder, the middle portion, and the front end were adjusted to 160° C., 180° C., and 200° C., respectively. Then with the input amount of polyol premixed material is 2139g / min, the input amount of HDI is the condition of 861g / min to add these raw materials continuously from the hopper mouth of twin-screw extruder, eject molte...

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Abstract

Disclosed is a thermoplastic polyurethane resin composition for plated dual molding, which comprises (A) an organic diisocyanate mainly composed of (a1) hexamethylene diisocyanate, (B) a polymer polyol mainly composed of (b1) polycarbonate diol, and (C) a chain-elongating agent mainly composed of (c1) an aliphatic diol having 2 to 10 carbon atoms.

Description

technical field [0001] The present invention relates to a thermoplastic polyurethane resin composition for two-color molding with plating (hereinafter sometimes referred to as "TPU"), a two-color molding for plating, a two-color molding with plating, and methods for producing them. Background technique [0002] The two-color molded body with plating refers to a molded body in which a molded body made of a hard component on which a plating layer is formed and a molded body made of a soft component without a plating layer are integrally formed. Such a plated two-color molded body is used, for example, as keys used for inputting electronic equipment such as home phones, mobile phones, and POS terminals. In addition, such a two-color molded body with a plating layer is obtained by integrating a molded body formed of a hard resin such as polycarbonate resin and a molded body formed of a rubber-like elastic body such as silicone rubber, for example, using an adhesive. And manufac...

Claims

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Application Information

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IPC IPC(8): C08G18/65B29C45/14C23C18/16C25D5/56B29K75/00
CPCC08G18/44C08G18/73C08G18/664C25D5/56
Inventor 榎田健
Owner NIPPON POLYURETHANE IND CO LTD
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