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Mold and coating used for mold

A coating and mold technology, applied in anti-corrosion coatings, fire-proof coatings, coatings, etc., can solve the problems of short coating life, high cleaning frequency, and short cleaning cycle, and achieve excellent weather resistance and aging resistance, and chemical corrosion resistance Excellent, good chemical resistance effect

Pending Publication Date: 2019-07-09
ZHEJIANG LAIFU MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tire mold is the main process equipment in the tire vulcanization process. Due to the effect of thermo-oxidative aging and vulcanization impurities, after a period of use, the surface of the mold will produce dirt, and even some dirt dead spots will be formed, which will affect the appearance of the tire and often cause difficulty in demoulding. The problem is that the labor intensity of the workers is high, and the mold is usually cleaned regularly by liquid cleaning or dry ice cleaning to maintain the cleanliness of the mold surface. However, the cleaning cycle is short and the cleaning frequency is high, which affects the production efficiency. This problem has always been troubled. tire industry
PTFE coating has acid resistance, alkali resistance and extremely low surface energy, so the coating has good anti-adhesion / non-stick performance, but the process of PTFE coating is complicated, and due to the characteristics of the material, it is not compatible with the substrate (such as Stainless steel, iron, aluminum, etc.) have poor adhesion, weak adhesion, short service life of the coating, and easy peeling of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: The influence of adhesive resins with different compositions on coating properties

[0018] The constituent resin of the binder resin is selected from polyphenylene sulfide (PPS), polyamideimide (PAI), polytetrafluoroethylene (PTFE), perfluoroethylene propylene copolymer (FEP), and choose one of them as pure The aqueous resin dispersion or at least two mixtures are mixed to form a hybrid aqueous resin dispersion. In the paint composition, the filler is made of chromium oxide green micropowder, and the addition amount is 10%; the auxiliary agent is composed of 3% dispersant, 1% defoamer and 1% leveling agent, among which the dispersant is coupled with 1.5% titanate It is composed of +1.5% anionic active agent, the leveling agent is a multifunctional silicone leveling agent; the solvent is 50% deionized water, and the amount of addition is; the binding resin (including a single-component pure resin and at least two resins The mixed type water-based resin dispersi...

Embodiment 2

[0028] Example 2: The effect of different composition fillers on coating performance

[0029] The effect of fillers in coatings is mainly reflected in the hardness and wear resistance of the coatings. Based on this consideration, we initially screened the selection range of fillers in chrome oxide green (Cr 2 O 3 ) Micro powder, silicon carbide (SiC) micro powder, nano silicon dioxide powder (SiO 2 ) Powder, molybdenum disulfide (MoS 2 ) The four basic ingredients of micropowder, especially chromium oxide green micropowder and silicon carbide micropowder, can not only give good hardness / strength and wear resistance, but also give the coating a yellow-green color with good recognition.

[0030] In the paint composition, the water-based resin dispersion is 15% polyphenylene sulfide + 20% perfluoroethylene propylene copolymer; the auxiliary agent is composed of 3% dispersant, 1% defoamer and 1% leveling agent. Among them, dispersant It is composed of 1.5% titanate coupling agent + 1.5%...

Embodiment 3

[0035] Example 3: Influence of different composition additives on coating performance

[0036] Additives mainly affect the performance stability of the coating and the mixing uniformity of the components in the coating molding. Based on this consideration, after preliminary research, it is determined that the additives are composed of dispersant, defoamer and leveling agent. The dispersant accounts for 2 to 5% of the total mass of the coating, and the defoamer is 0.5 to 2%. The leveling agent is 0.5-2%; among them, the dispersant improves the dispersion uniformity of the mixed water-based resin dispersion, the defoamer ensures the stability of the coating quality during the mixing process, and the leveling agent ensures the stability and smoothness of the use. The additives formed by the three combinations ensure the overall usability and ease of operation of the coating. The formed coating has excellent weather resistance and aging resistance and stability, and is suitable for p...

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Abstract

The application provides a mold and a coating used for the mold, and belongs to the technical field of coating compositions. The coating comprises the following components, in percentages by mass: 25-35% of bonding resin, 5-15% of a filler, 2-10% of an auxiliary agent and 35-50% of a solvent, wherein the bonding resin adopts a mixed water-based resin dispersion liquid; the filler is one or a mixture of more selected from the group consisting of chromium oxide green micro powder, silicon carbide micro powder, nano silicon dioxide powder and molybdenum disulfide micro powder; and the solvent iswater. When the coating provided by the invention is applied to the mold, especially fluorine-silicon modified tire mold processing, the demolding property is ensured, the adhesion between the coatingand the mold is improved, and the green environmentally-friendly pollution-free processing is realized.

Description

Technical field [0001] The application relates to a mold and a coating for the mold, belonging to the technical field of coating compositions. Background technique [0002] The tire mold is the main process equipment in the tire vulcanization process. Due to the effect of thermal oxidative aging and vulcanization impurities, after a period of use, the surface of the mold will produce dirt, and even some dirt corners will be formed, which affects the appearance of the tire and often has difficulty in demolding The problem is that workers’ labor intensity is high. Generally, liquid cleaning or dry ice cleaning is often used to clean the mold regularly to maintain the cleanliness of the mold surface. However, the short cleaning cycle and high cleaning frequency affect production efficiency. This problem has been plagued by Tire industry. [0003] In order to protect the mold, and improve the tire appearance quality and mold release, some domestic tire manufacturers currently use PTFE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D181/02C09D179/08C09D127/18C09D127/20C09D5/08C09D7/61B29C33/56
CPCB29C33/56C08K2003/2251C08K2003/3009C08K2201/011C08L2201/08C08L2205/02C08L2205/03C08L2205/035C09D5/08C09D5/18C09D7/61C09D127/18C09D127/20C09D179/08C09D181/02C08L79/08C08L81/02C08L27/18C08K13/02C08K3/22C08K3/34C08K3/36C08K3/30
Inventor 施征东潘伟润
Owner ZHEJIANG LAIFU MOLD
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