Weld seam glue

The invention discloses a weld seam glue which comprises the following components in percentage by weight: 15%-20% of polyvinyl chloride, 35%-38% of a plasticizer, 28%-32% of calcium carbonate, 7%-9%of hollow glass microspheres, 0.8%-1.2% of zinc oxide, 4%-6% of calcium oxide, 0.8%-1% of a liquid stabilizer without heavy metal ions and 3%-5% of end-capped polyurethane. The weld seam glue uses thehollow glass microspheres to fill the composition system of the weld seam glue, and the formula of the weld seam glue is optimized, so that the density of the system is reduced, the welding seam gluehas ultralow specific gravity, and the light weight of the automobile is realized. 本发明公开了种焊缝胶，由聚氯乙烯、增塑剂、碳酸钙、空心玻璃微球、氧化锌、氧化钙、无重金属离子的液态稳定剂和封端型聚氨酯组成，按照质量百分含量计，聚氯乙烯15％～20％、增塑剂35％～38％、碳酸钙28％～32％、空心玻璃微球7％～9％、氧化锌0.8％～1.2％、氧化钙4％～6％、液态稳定剂0.8％～1％、封端型聚氨酯3％～5％，该焊缝胶使用空心玻璃微球来填充焊缝胶的组成体系，优化焊缝胶的配方，从而降低体系的密度，使得焊缝胶具有超低比重，实现了汽车轻量化。