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Hot melt adhesive composition, manufacturing method of the same, and car headlamp

A technology of hot-melt adhesives and compositions, applied in the direction of adhesive types, polyurea/polyurethane adhesives, mineral oil hydrocarbon copolymer adhesives, etc., can solve the problem of simultaneously improving initial viscosity, reactivity and Problems such as processability, increased processing cost, etc., achieve the effect of excellent initial adhesion, effective curing, excellent anti-foaming and cross-linking ability

Active Publication Date: 2018-08-07
HYUNDAI MOBIS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that it is difficult to simultaneously improve the initial viscosity, reactivity, and workability, and the processing cost increases

Method used

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  • Hot melt adhesive composition, manufacturing method of the same, and car headlamp
  • Hot melt adhesive composition, manufacturing method of the same, and car headlamp
  • Hot melt adhesive composition, manufacturing method of the same, and car headlamp

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0080] 15 wt% of polyether polyol and 15 wt% of polyester polyol were introduced into the reactor, and then the contents of the reactor were heated to 160°C and stirred at a speed of 150 rpm to melt the plasticizer. Next, 9 wt % of diphenylmethane diisocyanate and 0.2 parts by weight of an amine catalyst were added to the heated reactor, followed by reaction at 200° C. for 30 minutes. Then, 40 wt% of petroleum resin, 11 wt% of polyester elastomer resin, and 10 wt% of ethylene-vinyl acetate resin were added to the reactor, followed by stirring at 150 rpm for 30 minutes, thereby preparing a hot melt adhesive composition .

[0081] Example 2 and Comparative Examples 1 to 5

[0082] Hot melt adhesive compositions were prepared in the same manner as described in Example 1 except that the compositions and their contents were changed as shown in Table 1 below.

[0083] Methods used to evaluate physical properties

[0084] (1) Melt viscosity: The hot-melt adhesives prepared in ...

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PUM

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Abstract

An embodiment of the present invention relates to a hot melt adhesive composition comprising 35 to 40 wt% of petroleum resin, 10 to 14 wt% of polyester elastomer resin, 10 to 14 wt% of ethylene vinylacetate resin, 14 to 19 wt% of polyether polyol, 15 to 21 wt% of polyester polyol, 8 to 10 wt% of methylene diphenyl diisocyanate, and 0.1 to 0.5 wt% of an amine catalyst, wherein the hot melt adhesive composition has 20,000 to 50,000 cps of melting viscosity measured at 150 DEG C. The hot melt adhesive composition according to the present invention is excellent in workability as well as initial adhesion, initial adhesive force, initial adhesive properties and heat resistance, has excellent crosslinking properties and bubble preventing properties after final curing, has an excellent curing time reduction effect, and is excellent in impact resistance after curing.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Application No. 10-2016-0144658 filed on November 1, 2016, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a hot-melt adhesive composition for vehicle headlamps, its preparation method and vehicle headlamps. Background technique [0004] A vehicle headlamp is a lamp attached to the front of a vehicle to illuminate the road ahead in order to allow safe driving of the vehicle even at night. Generally, a headlamp includes a light source, a reflector configured to reflect light from the light source forward, and a lens configured to adjust luminous efficiency of the reflected light. This headlamp is manufactured by assembling a lens, a lamp, and a reflector, but has a disadvantage in that moisture and fine particles enter the gap between the assembled parts, causing condensation or reducing luminous ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J157/02C09J175/04C09J167/00C09J123/08B60Q1/04F21S45/50F21W107/10
CPCB60Q1/04C09J157/02F21V31/005C08L2201/08C08L2205/035C08L2203/206C08L75/04C08L67/00C08L23/0853B29C66/12469B29C66/1312B29C66/542B29C66/71B29L2031/30F21S41/29F21S41/28B29C65/4815B29L2031/747B29K2069/00B29K2023/12C08L31/04C08L71/02C09J175/04C08L57/02C09J9/00C08G18/4018C08G18/7664C09J2301/304C09J2301/312C09J175/08C09J175/06B29L2031/3055C08F240/00C09J2431/006C09J2467/006C09J2471/006
Inventor 刘旼根李祯焕金圣昊金东准
Owner HYUNDAI MOBIS CO LTD
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