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The Research and Application of Automobile Inner Decorating Adhesives

Author: WangZhongHua
Tutor: LinZhongXiang
School: Nanjing Forestry University
Course: Chemical processes
Keywords: Acrylic emulsion Automotive interior plastic Hot Melt Adhesive Polyurethane Peel strength
CLC: TQ436.3
Type: Master's thesis
Year: 2010
Downloads: 232
Quote: 0
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Abstract


Instead of the traditional solvent-based adhesives in order to adapt to the social and environmental needs, the development of environment-friendly green automotive interior adhesive is necessary. Acrylic emulsion adhesive and single-component moisture-curing polyurethane hot melt adhesive is solvent-free and safe, of great significance to the development of the automotive industry. Using pre-emulsification and the seed polymerization process, to study the glass transition temperature, the influence of types of hard monomer, the functional monomer, a tackifying resin and other factors on the adhesive properties of the acrylic emulsion, and its application in the automotive interior parts. The studies show that the solids content of the same, using the seed emulsion prepared by the emulsion pressure sensitive adhesive having a low viscosity and the better the polymerization stability. When the glass transition temperature of -50 ° C, styrene (St) for the hard monomer, a functional monomer acrylate, 2 - hydroxyethyl acrylate (2-HEA) of an amount of 3% aqueous rosin tackifying resin added in an amount 5%, prepared by emulsion pressure sensitive adhesive has a good performance, its viscosity is 155 mPa · s, the initial adhesive strength on the 9th ball, holding the adhesive strength is greater than 48 h, 180 ° peel strength of 18.35 N/25mm . Order to synthesize the emulsion pressure sensitive adhesive having a high peel strength of the glass transition temperature of plus seed emulsion and the amount of the emulsion pressure sensitive adhesive performance, and KH-570 using silicone modified acrylic emulsion. The results show that, by an organic silicon change the performance of the KH-570 significantly improve the peel strength of the emulsion pressure sensitive adhesive; emulsion pressure sensitive adhesive peel strength with the plus seed latex glass transition temperature and the improvement of the amount is gradually increased, but the pressure-sensitive dft the transparency is gradually decreased with increasing plus seed latex glass transition temperature. When silicone KH-570 dosage was 1.0%, plus seed emulsion glass transition temperature of 0 ° C, an amount of 15.0%, the best the synthesized emulsion pressure sensitive adhesive performance. This study the emulsion pressure sensitive adhesive to eliminate the residual monomer and irritating odor, and a variety of post-processing method was found, and before the end of the reaction by added oleophilic tert-butyl hydrogen peroxide and formaldehyde sulfate sodium hydrogen as a redox initiator, with the appropriate amount of ferrous ions as the catalyst synthesis of acrylic emulsion pressure sensitive adhesive less residual monomers, small odor. The article also moisture-curing one-component polyurethane hot melt adhesive automotive interior adhesive polyurethane hot melt adhesive performance of the isocyanate index, the type of polyol and catalyst. The results showed that when the application polyethylene adipate diol (PBA), an isocyanate index of 1.8, the 120 ° C melt viscosity of the polyurethane hot melt adhesive was 2400 mPa · s, the open time of 55 s, the initial strength of 2.9 N/25mm, 48 h after the final strength of 8.9 N/25mm; use of di-n-butyl tin (T-12), and a mixture of catalyst A catalyst system, can significantly speed up single-component moisture-curing polyurethane hot melt adhesive curing in the curing rate, the amount of respectively 0.05% of the polyol quality can reach 12 h after the final adhesive strength. While polyurethane hot melt adhesive of the DSC analysis showed that the glass transition of the polymer does not appear, but the system of the transition from the crystalline phase to the liquid phase, therefore, the DSC curve can be used as the melting point of the single-component moisture-curing polyurethane hot melt adhesive or melted The temperature of the criterion.

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CLC: > Industrial Technology > Chemical Industry > Adhesive Industry > Various properties of adhesive > Pressure-sensitive adhesive
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