Bicomponent dip solution for bonding polyester chord thread and rubber and preparation process of bicomponent dip solution

Abstract

The invention provides a bicomponent dip solution for bonding a polyester chord thread and rubber and a preparation process of the bicomponent dip solution. The dip solution is composed a component A and a component B, wherein the component A comprises the raw materials in parts by mass: 120-170 parts of diisocyanate, 40-60 parts of dihydric alcohol, 5-7 parts of trihydric alcohol, 25-30 parts of hydrophilic solvent, 80-85 parts of sealing agent, 13-15 parts of neutralizer and 300-500 parts of deionized water, and the component A is prepared through processes such as pre-polymerization, sealing, neutralization, emulsification and the like; and the component B comprises 100 parts of epoxy resin, 3 parts of modifying agent, 1 part of methanoic acid and 1 part of emulsifier, and the component B is prepared through processes such as modification, neutralization, emulsification and the like. The product is good in stability, strong in bonding power, convenient to use, simple in preparation process, easy to operate and environment-friendly. The product is mainly used for bonding the polyester chord thread and the rubber.

Description

Technical field: [0001] The invention relates to a two-component adhesive and its preparation process, in particular to a two-component dipping solution for polyester cord and rubber bonding and its preparation process. Background technique: [0002] Polyester cord is an excellent skeleton material for rubber products, widely used in radial tires, conveyor belts and other fields. However, due to the low surface activity of the polyester cord, the bonding effect between the interface between the polyester cord and the rubber is not good. Carry out dipping treatment. At present, most of the dipping solutions used by domestic counterparts are the formula or improved formula of DuPont D-417. The common problems of these formulas during use are mainly: (1) DuPont D-417 formula or improved formula uses caprolactam-blocked MDI as the base material, which has poor water solubility and is dispersed and suspended in water by the effect of emulsifiers, and generally placed for 30 m...

AI Technical Summary

Problems solved by technology

The common problems of these formulas during use are mainly: (1) DuPont D-417 formula or improved formula uses caprolactam-blocked MDI as the base material, which has poor water solubility and is dispersed and suspended in water by the effect of emulsifiers. Generally, it is placed for 30 minutes The above will form a suspension with uneven concentration up and down, and even precipitate

Therefore, it must be stirred evenly before use, which is inconvenient to operate and prone to quality problems

(2) The DuPont D-417 formula or improved formula uses a two-component dipping solution, one of which uses an imported special water-based epoxy resin, which is not only expensive, but also has a good dipping solution. The glue must be used within 72 hours, and the adhesive force will decrease after 72 hours

Due to the large suspended particles in the suspension, the particles adhere to the cord during gluing, and the particles are easy to fall when blown by hot wind during drying, resulting in uneven gluing and resulting in fluctuations in the adhesive force between the cord and rubber Larger, resulting in unstable performance of the final product

Among them, the price of special water-based epoxy resin has risen rapidly in recent years, resulting in limited use