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Hot-melt pressure sensitive adhesive for automobile interior part

A technology for hot-melt pressure-sensitive adhesives and automotive interior parts, which is applied in the directions of adhesives, adhesive types, mineral oil-hydrocarbon copolymer adhesives, etc. High problems, to achieve the effect of excellent bonding and sealing performance, high production efficiency, good softness and elasticity

Active Publication Date: 2012-10-10
中国航天科技集团公司第四研究院第四十二所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of the hot melt adhesive is complicated, the equipment requirements are high, and the production cost is increased
The colloid has high hardness at room temperature, and the bonding and sealing effect on flexible interior parts is not good.
[0004] Chinese Invention Patent Application Publication CN1401724A provides a hot melt adhesive formula, including polyamide, ethylene-vinyl acetate copolymer (EVA), tackifying resin, nano filler, etc. Mixed, then extruded and granulated, the softening point reaches 153°C, and is used for bonding and packaging electronic components. The hot melt adhesive has a high melting viscosity and is inconvenient to apply. The bonding effect of the parts is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Automobile hot-melt pressure-sensitive adhesive component ratio (mass %)

[0021] SIS (14% styrene content) 35

[0022] SEPS 10

[0023] Terpene resin (color number 3, softening point 100°C) 15

[0024] hydrogenated C 5 Petroleum resin (color number 3, softening point 108°C) 20

[0025] Nano-CaCO 3 7

[0026] Titanium dioxide 3

[0027] Microcrystalline wax (softening point 108°C) 5

[0028] Trioctyl trimellitate (TOTM) 4

[0029] Antioxidant 1010 1

[0030] SIS, SEPS, TOTM and antioxidants were weighed in proportion and added to a horizontal kneader that had been preheated for 60 minutes (wall temperature 180°C), kneaded for 40 minutes, and then added proportionally weighed terpene resin, hydrogenated C 5 Petroleum resin, microcrystalline wax, titanium dioxide, and nano fillers were kneaded at high temperature (175°C) for 40 minutes. Pour into a 25cm×15cm×7cm cube box (lined with high-temperature release paper) in a mol...

Embodiment 2

[0031] Embodiment 2: automobile hot-melt pressure-sensitive adhesive component ratio (mass %)

[0032] SIS (14% styrene content) 25

[0033] SEPS 21

[0034] Terpene resin (color number 3, softening point 100°C) 15

[0035] hydrogenated C 5 Petroleum resin (color number 2, softening point 105°C) 20

[0036] Nano-CaCO 3 7

[0037] Titanium dioxide 4

[0038] Microcrystalline wax (softening point 103°C) 4

[0039] Trioctyl trimellitate (TOTM) 3

[0040] Antioxidant BHT264 1

[0041] SIS, SEPS, TOTM and antioxidants were weighed in proportion and added to a horizontal kneader that had been preheated for 70 minutes (wall temperature 190°C), kneaded for 40 minutes and then added proportionally weighed terpene resin, hydrogenated C 5 Petroleum resin, microcrystalline wax, titanium dioxide, and nano fillers were kneaded at high temperature (170°C) for 50 minutes. Pour into a 25cm×15cm×7cm cube box (lined with high-temperature release paper) in a...

Embodiment 3

[0042] Embodiment 3: automobile hot-melt pressure-sensitive adhesive component ratio (mass %)

[0043] SIS (16% styrene content) 25

[0044] SEPS 15

[0045] hydrogenated C 5 Petroleum resin (color number 1, softening point 103°C) 40

[0046] Nano-Al 2 o 3 7

[0047] Titanium dioxide 3

[0048] Microcrystalline wax (softening point 105°C) 5

[0049] Trioctyl trimellitate (TOTM) 4

[0050] Antioxidant 1010 1

[0051]SIS, SEPS, TOTM and antioxidants were weighed in proportion and added to a horizontal kneader that had been preheated for 60 minutes (wall temperature 180°C), kneaded for 40 minutes and then added proportionally weighed terpene resin, hydrogenated C 5 Petroleum resin, microcrystalline wax, titanium dioxide, and nano fillers were kneaded at high temperature (185°C) for 60 minutes. Pour into a 25cm×15cm×7cm cube box (lined with high-temperature release paper) in a molten state, and wrap it with release paper after cooling.

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Abstract

The invention discloses a hot-melt pressure sensitive adhesive for an automobile interior part, which is used for bonding and sealing automobile body metals, plastics and rubber interior parts. The hot-melt pressure sensitive adhesive comprises the following components in percentage by weight: 25-35 percent of styrene-isoprene-styrene segmented copolymer, 10-25 percent of styrene-ethylene-propylene-styrene segmented copolymer, 30-45 percent of tackifying resin, 3-8 percent of nano CaCO3 or Al2O3, 3-8 percent of titanium white, 3-8 percent of microcrystalline wax used as a process auxiliary agent, 2-5 percent of trioctyl trimellitate used as a plasticizer and 0.5-1 percent of antioxidant. The preparation process of the hot-melt pressure sensitive adhesive comprises the following steps of: sequentially adding the materials into a horizontal kneading machine in proportion for heating and kneading; injecting the materials into a square die for molding; cooling and demoulding; and packaging with release paper. The hot-melt pressure sensitive adhesive has the advantages of high temperature resistance, high bonding strength, excellent bonding and sealing properties, good flexible elasticity, high production efficiency, simple operation, no spray gun blockage and environmental protection.

Description

technical field [0001] The invention relates to a hot-melt pressure-sensitive adhesive used for bonding and sealing automobile body metal, plastic and rubber interior parts. Background technique [0002] At present, the automobile and spare parts production industry that is vigorously developed in our country requires a large amount of industrial adhesives, which are widely used for bonding and sealing between metal materials, plastics, rubber and other materials. In the production line, the degree of automation is high and the production efficiency is high. The adhesive used requires good bonding and sealing performance and short curing time. At the same time, because the car is exposed to the sun in summer, the temperature inside the car is as high as 80°C to 100°C, so there are also high requirements for the temperature resistance of the adhesive, and it must not emit odor. In addition, many car interiors are very soft and feel good, so the adhesive colloid used should b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J153/02C09J147/00C09J157/02C09J125/08C09J11/06C09J11/04
Inventor 左向阳蔡彦
Owner 中国航天科技集团公司第四研究院第四十二所
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