Low fog value polyester composition and preparation thereof
A technology of composition and fog value, which is applied in the field of polymer material preparation, can solve the problems of fogging of transparent lampshade materials, affecting the surface effect of metal plating layer, affecting the long-term use and appearance of car lights, etc., to improve the processing and molding efficiency, excellent Dimensional stability and stable product quality
Inactive Publication Date: 2009-06-24
SHANGHAI KUMHO SUNNY PLASTICS
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Problems solved by technology
Under long-term high-temperature use conditions, the small molecules partially decomposed by the material and the small molecules added in the material modification will volatilize and condense on the lampshade, resulting in fogging of the transparent material of the lampshade, which affects the long-term use and appearance of the lamp; And the precipitation of small molecules will also affect the surface effect of the metal plating layer
Method used
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Embodiment
[0060] formula:
[0061] The formulations of Examples A and B and Examples 1-8 are shown in Table 1.
[0062] Table 1
[0063]
[0064] Among them: a is polybutylene terephthalate, Ultradur B4500 of Basf; b is polyethylene terephthalate, PET of Shanghai Petrochemical; c is 4A molecular sieve of Shanghai Sinopharm Reagent; d is Shanghai Sinopharm Reagent E is Shell’s EP1001; f is RheinChmie’s Stabaxol P200; g is CIBA’s IG-1010; h is CIBA’s IG-168; i is Rohm&Hass’s Paraloid EXL-2691A; j is Atfona’s Lotader AX8900; k is 2500 mesh talcum powder; 1 is Nyad 5000 from Nyco. Processing technology:
[0065] High-speed mixer: rotating speed 650rpm, time 30min.
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Abstract
The invention relates to a polyester composition with low fog value and a preparation method thereof. Hypocrystalline thermoplastic polyester, micromolecule absorbent, long lasting stabilizing agent, antioxidizer, nucleating agent and toughener are evenly mixed at the mixture ratio according to the parts by weight, and then stirred by a high-speed mixer; the mixture is transmitted into a double screw extruder by main feeding, and then mineral filling material is added into the extruder from side feeding; finally, granules are extruded, and the product is obtained. The finished piece material of the polyester composition with low fog value can be maintained for 24h at the temperature of 150-185 DEG C, and the light transmission rate of a glass sheet which is fogged is reduced by 0-5%. Furthermore, the preparation operating process is simple and continuous, and has high production efficiency and stable product quality.
Description
Technical field [0001] The invention relates to the field of polymer material preparation, in particular to a low haze value polyester composition and a preparation method thereof. Background technique [0002] The automobile industry is developing rapidly, maintaining a growth rate of more than 10% every year, and automobile design is also developing in the direction of safety, comfort, light weight, energy saving, and individualization. In order to cope with this trend, the materials used in automobile lamps have been gradually replaced by polyester and mineral filler materials from the heat-resistant PC materials commonly used in the past. Compared with heat-resistant PC materials, the outstanding features of polyester plus mineral fillers are high heat resistance, good processability and low cost. It has excellent fluidity and heat resistance, and can realize the integration of the reflector and decorative ring of the headlight; compared with the heat-resistant PC material, t...
Claims
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IPC IPC(8): C08L67/02C08K13/04C08K7/26C08L63/00C08L79/00B29B9/02B29C47/92B29C48/40B29C48/92
CPCB29C48/04B29C48/40
Inventor 辛敏琦李荣群李强
Owner SHANGHAI KUMHO SUNNY PLASTICS
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