Production method of TPR shoe material surface treatment agent

Abstract

The invention discloses a production method of a TPR (thermoplastic rubber) shoe material surface treatment agent. The method comprises the following steps of: (1) heating an organic solvent in a reaction kettle; (2) adding 90-110 parts of an SBS elastomer, 55-65 parts of high-chlorinated polyethylene and 5 parts of chlorinated rubber into the organic solvent, and heating the reaction kettle; (3) adding 80-90 parts of a monomer MMA (methyl methacrylate); (4) adding 3.2 parts of an initiator, and conducting stirring and heating; (5) adding 12-17 parts of a monomer BA and 0.8 parts of the initiator, carrying out stirring and thermal insulation reaction; (6) after 2-5h of reaction, inputting 4 parts of a terminator, and lowering the temperature; (7) lowering the temperature to 50DEG C, thus obtaining a semi-finished product of the TPR treatment agent; and (8) using a mixed organic solvent semi-finished product to adjust the viscosity so as to obtain a finished product of the treatment agent. According to the invention, the heat resistance and yellowing resistance of the treatment agent are improved, the monomer conversion rate of the reaction system is improved, and the polarity of the treatment agent is greatly improved, so that effects of the treatment agent can be achieved.

Description

【Technical field】 [0001] The invention relates to the treatment of rubber materials, in particular to a method for surface treatment of rubber materials used in the shoemaking industry. 【Background technique】 [0002] Thermoplastic Rubber-TPR, also known as Thermoplastic Elastomer-TPE, is a material that combines rubber and thermoplastic specials. Thermoplastic elastomers have many possible structures. The most fundamental one is At least two mutually dispersed polymer phases are required. At normal service temperature, one phase is fluid and the other phase is solid, and there is an interaction between the two phases, that is, rubber elasticity at normal temperature and plasticity at high temperature. The chemically formed polymer material has the mechanical properties and performance similar to rubber, and can be processed and recycled as thermoplastics. It builds a bridge between plastics and rubber. [0003] The commonly used thermoplastic styrene-butadiene rubber elast...

AI Technical Summary

Problems solved by technology

At present, the existing TPR treatment agent can no longer treat complex TPR shoe materials. To deal with this kind of TPR shoe material with oily surface and other unknown impurities, a new treatment agent must be used, and toluene is not used to meet environmental protection requirements.

The TPR shoe material used in traditional shoemaking has high purity TPR and is easy to handle. Only neoprene or TPR rubber is dissolved in toluene and then heated up to directly dilute with a high-concentration polymer grafted with monomer MMA (methyl methacrylate). It can be bonded after post-processing, but with the improvement of shoe material quality requirements, many new materials have been developed, and other materials have also begun to appear in TPR shoe materials, and the difficulty of surface treatment has increased. The function is to soften the shoe material or make it easy to bond before bonding. However, some existing conventional treatment agents are basically unable to process or fail to achieve the desired effect before bonding with adhesives. That is to say, it does not have the effect of treatment and softening for emerging materials, and cannot effectively improve the polarity of the shoe material surface, which may easily cause low bonding and peeling strength.

[0004] Existing TPR treatment agent, after testing, the peeling situation of leather and various TPR shoe materials is not ideal, and the existing problems are: no pulling force, TPR shoe surface glue will be stripped after peeling; there is pulling force, the pulling force is not enough, and the adhesion point is not face

Therefore, the original TPR treatment agent has insufficient modification, insufficient oil resistance, and insufficient polarity, and cannot act as a bridge between the shoe material and the adhesive; Sex is not strong

Although a TPR treatment agent with better treatment effect has begun to appear in the market, it is mainly through the dissolution of SBS elastomer and high-chlorinated polyethylene rubber in toluene and the grafting reaction of monomer MMA to obtain long-chain TPR. Polymer compound, diluted and adjusted as TPR treatment agent, but there are still problems such as insufficient modification, poor permeability, and high toxicity

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