Thermoplastic polyamide resin composition having improved paint adhesion
A technology of polyamide resin and composition, which is applied in the direction of thin material handling, transportation and packaging, and can solve the problems of product discoloration and low heat resistance
Inactive Publication Date: 2010-06-02
RHODIA POLYAMIDE
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Problems solved by technology
[0008] Conventionally, International Patent Application Publication No. WO2005 / 113695 discloses a composition having improved paint adhesion by adding phenol novolac resin to polyamide; however, this composition has some problems such as low Resistance to heat, and discoloration of the product after coating due to heat and UV radiation
Method used
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Examples
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Effect test
Embodiment 1-10 and comparative example 1-14
[0085] Embodiment 1-10 and comparative example 1-14: the preparation of polyamide resin composition
[0086] The ingredients selected above were uniformly mixed in a super mixer according to the respective mixing ratios of the Examples and Comparative Examples. Although a single-screw extruder or a twin-screw extruder may be used, a twin-screw extruder (inner diameter 30 mm, L / D=30) is used in the present invention. When A-I is used alone in the polyamide resin component or when A-I is used in the form of a mixture, the barrel temperature in the extruder is set at 260-280°C; when A-2 is used alone in the polyamide resin component , the barrel temperature was set at 250°C. Under the condition that the rotational velocity of the screw is 250-300 RPM and the pressure of the vacuum pump is 50-70 cmHg, the gas in the screw is evacuated. At this time, the processing capacity is 25-30 kg / hr, whereby it is completely melt-mixed in the barrel of the extruder, and the formed compositi...
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Abstract
The thermoplastic polyamide resin composition of the present invention includes the essential components of polyamide resin, polyalcohol and epoxy resin. Said composition may comprise the one or more optional additives from the group consisting of thermoplastic impact modifier, reinforcement agent, and polyoxide. The thermoplastic polyamide resin composition of the invention provides superior impact resistance, heat resistance, low degree of deformation, low degree of contraction, and external appearance but also superior paint adhesion properties without having to use a primer. Said composition functions as an adhesion medium, such that it may advantageously be applied to the interior and exterior parts of an automobile requiring painting.
Description
technical field [0001] The thermoplastic polyamide resin composition of the present invention includes polyamide resin, polyol and epoxy resin as main components. The composition may comprise one or more optional additives selected from thermoplastic impact modifiers, reinforcing agents and polyoxides. The thermoplastic polyamide resin composition of the present invention provides not only excellent impact resistance, heat resistance, low deformation, low shrinkage, and appearance, but also excellent paint adhesion without using a primer. The composition is used as an adhesive medium so that it can advantageously be applied to interior and exterior parts of automobiles to be coated. [0002] The present invention relates to a thermoplastic polyamide resin composition having improved paint adhesion, and more particularly, to a thermoplastic polyamide resin composition exhibiting excellent paint adhesion without using a primer, the resin composition being The coating process i...
Claims
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IPC IPC(8): C08L77/00
CPCC08L29/04C08L77/02C08L63/00C08L77/00C08L77/06C08L71/12C08L2205/03Y10T428/31511Y10T428/31725Y10T428/31739Y10T428/31765C08L2666/02C08L2666/22C08L2666/04C08L2201/08
Inventor L-W·张Y-C·柳J-S·李
Owner RHODIA POLYAMIDE