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Thermosetting moisture-resistant welding seam sealant

A heat-hardening and sealant technology, applied in the field of weld sealants, can solve the problems of unsatisfactory waterproof and moisture-resistant functions, insufficient waterproof and moisture-resistant timeliness, and poor product appearance quality

Inactive Publication Date: 2013-01-23
张家港爱科思汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The original weld sealant PVC resin is used as the main component, and contains fillers, plasticizers, tackifiers, hygroscopic agents, and stabilizers. During the high humidity season, the moisture in the atmosphere will slowly penetrate into the applied weld sealant, and then after baking, bubbles will appear in the welded part, resulting in poor appearance quality of the product. It needs to be reprocessed, which wastes a lot of labor and material resources, reduces production efficiency, and greatly increases production costs.

Method used

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  • Thermosetting moisture-resistant welding seam sealant
  • Thermosetting moisture-resistant welding seam sealant
  • Thermosetting moisture-resistant welding seam sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The following is a detailed description based on Examples and Comparative Examples.

[0015] Table 1 is a comparison table of each component composition of the embodiment and comparative examples 1 and 2.

[0016]

[0017]

[0018] Table I

[0019] Table 2 is the moisture-resistant time test. Comparative examples 1, 2 and the examples are made of test pieces by the same smearing method, and then stored in 1, 2 storage chains. After being placed for 7 days, Comparative Examples 1, 2 and Examples were stored for different days in each storage chain to evaluate the appearance of bubbles after heating and hardening.

[0020]

[0021] Table II

[0022] According to the results in Table 2, it can be seen that under high temperature and high humidity conditions, comparative examples 1 and 2 will have poor appearance quality after being placed in the 1 storage chain for 24 hours, and after being placed in the 2 storage chain for 48 hours, while the examples are place...

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Abstract

The invention discloses a thermosetting moisture-resistant welding seam sealant. The sealant comprises the following components by weight percent: 20-35wt% of PVC (polyvinyl chloride) resin, 20-35wt% of filler, 25-35wt% of plasticizer, 1-15wt% of tackifier, 5-10wt% of hygroscopic agent and 1-5wt% of stabilizer, wherein, the hygroscopic agent is composed of 2.5-5wt% of uncoated calcium oxide and 2.5-5wt% of coated calcium oxide. The thermosetting moisture-resistant welding seam sealant has the advantages of good waterproof and moisture-resistant effect and long-acting water and moisture resistance so as to prevent rework of the product due to poor appearance quality caused by moisture absorption, thus improving production efficiency and lowering production cost.

Description

technical field [0001] The invention relates to a weld seam sealant, in particular to a heat-hardening and moisture-resistant weld seam sealant acting between the joints of the inner panel and the outer panel of the automobile. Background technique [0002] Generally speaking, the joints of the inner and outer plates of most automobile steel plates are coated with weld sealant to play the role of waterproof, anti-rust, and noise reduction. The weld sealant is applied before paint spraying, and then primed→ The hardening reaction is completed after the middle coat → top coat is baked in the oven. [0003] The original weld sealant PVC resin is used as the main component, and contains fillers, plasticizers, tackifiers, hygroscopic agents, and stabilizers. During the high humidity season, the moisture in the atmosphere will slowly penetrate into the applied weld sealant, and then after baking, bubbles will appear in the welded part, resulting in poor appearance quality of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/10C08K3/22C09K3/10C09J127/06C09J11/04
Inventor 裴仁哲朴一西张世俊
Owner 张家港爱科思汽车配件有限公司