阅读说明：本技术 一种环保耐热型单组份pu及其制备方法 (Environment-friendly heat-resistant single-component pu and preparation method thereof ) 是由 陈小兵 罗斌 李军 张存刚 于 2020-09-01 设计创作，主要内容包括：本发明公开了一种环保耐热型单组份PU及其制备方法,所述环保耐热型单组份PU的成分包括聚酯多元醇、MEK、异氰酸酯、三官能团扩链剂、交联剂、催化剂、小分子扩链剂、EAC、AC。该环保耐热型单组份PU及其制备方法,通过在对鞋材贴合时,可不用和固化剂配套使用,就具有较好的初粘性能及耐热性能；并且该PU胶不含三苯溶剂,使得防止侵入人体使得出现短时间吸入高浓度的气体或长期吸入低浓度气体均可引起作业工人身体损害,造成急性或慢性中毒,为此在使用过程中增加装置使用时的安全性,同时减小对身体造成伤害的现象。(The invention discloses an environment-friendly heat-resistant single-component PU and a preparation method thereof. When the environment-friendly heat-resistant single-component PU and the preparation method thereof are used for bonding shoe materials, the PU can be used without being matched with a curing agent, and has better initial adhesive property and heat resistance; the PU adhesive does not contain a triphenyl solvent, so that the PU adhesive can prevent the PU adhesive from invading a human body, causing the body damage of workers caused by the short-time inhalation of high-concentration gas or the long-term inhalation of low-concentration gas, and causing acute or chronic poisoning, thereby increasing the safety of the device during use in the use process and simultaneously reducing the phenomenon of causing the injury to the body.)

1. The utility model provides a heat-resisting type of environmental protection monocomponent PU which characterized in that: the environment-friendly heat-resistant single-component PU comprises polyester polyol, MEK, isocyanate, a trifunctional group chain extender, a cross-linking agent, a catalyst, a micromolecular chain extender, EAC and AC.

2. The environmentally friendly heat resistant single component PU according to claim 1, wherein: the PU adhesive mainly comprises the following components: 300 parts of polyester polyol 270-one, 300-500 parts of MEK, 16-18 parts of isocyanate, 0.4-0.7 part of trifunctional chain extender, 0.03-0.1 part of cross-linking agent, 0.04-0.08 part of catalyst, 0.4-1 part of micromolecular chain extender, 300-400 parts of EAC and 600-1000 parts of AC.

3. A preparation method of environment-friendly heat-resistant single-component PU is characterized by comprising the following steps: the preparation method of the environment-friendly heat-resistant single-component PU comprises the following steps:

the first step is as follows:

adding 270 parts of polyester polyol into a reaction bottle, heating to 110-120 ℃ to start melting, stirring at low speed and vacuumizing for 30min after complete melting.

The second step is that:

cooling to 80-85 ℃, adding 150 parts of MEK, 16.8 parts of HDI, 0.6 part of TMP, 0.08 part of triethanolamine and 0.04-0.08 part of bismuth catalyst into the reaction bottle, and starting to react for 3-4 hours.

The second step is that:

and adding BDO and HDO in 0.1-1 part and MEK in 200 parts in steps, and reacting for 1-2 hours.

The second step is that:

cooling to below 50 ℃, adding 300-400 parts of EAC and 600-1000 parts of AC to dilute the reaction product.

4. The preparation method of the environment-friendly heat-resistant single-component PU according to claim 3, wherein the preparation method comprises the following steps: the preparation method of the environment-friendly heat-resistant single-component PU comprises the following second preparation method:

the first step is as follows:

adding 270 parts of polyester polyol into a reaction bottle, heating to 110-120 ℃ to start melting, stirring at low speed and vacuumizing for 30min after complete melting;

the second step is that:

cooling to 80-85 ℃, adding 150 parts of MEK, 16.7 parts of HDI, 0.6 part of TMP, 0.5-1 part of N3300 and 0.04-0.08 part of bismuth catalyst into a reaction bottle, and starting to react for 3-4 hours;

the third step:

adding 0.1-1 part of BDO/HDO and 200 parts of MEK step by step, and reacting for 1-2 hours;

the fourth step:

cooling to below 50 ℃, adding 300-400 parts of EAC and 600-1000 parts of AC to dilute the reaction product.

Technical Field

The invention relates to the field of synthesis of environment-friendly pu in fine chemical engineering, and particularly relates to environment-friendly heat-resistant single-component pu and a preparation method thereof.

Background

At present, China is the first shoe producing country in the world, and the requirements on the shoe making industry are higher and higher. As the demand for various shoes used in special circumstances has increased, the demand for special properties of adhesives for shoes has also increased. Due to the variety and color of shoe materials (such as PVC, PC, TPR, rubber, EVA-PE plastic and the like), the requirements on initial viscosity, yellowing resistance, heat resistance, environmental protection and the like of the adhesive for shoes are increasing, and the adhesive in the market at present mainly comprises a two-component solvent adhesive, is slightly deficient in heat resistance and mostly contains solvents such as triphenyl. The invention mainly relates to an environment-friendly single-component adhesive with high initial adhesion and high heat resistance under the comprehensive market condition

The disadvantages are as follows:

the adhesive in the current market is mainly a bi-component solvent adhesive, most of which contains solvents such as triphenyl, and the like, and has slightly deficient heat resistance.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an environment-friendly heat-resistant single-component pu and a preparation method thereof, and solves the problems that the adhesive in the current market is mainly a bi-component solvent adhesive, mostly contains solvents such as triphenyl and the like, and has slightly insufficient heat resistance.

In order to achieve the purpose, the invention provides the following technical scheme:

the environment-friendly heat-resistant single-component pu comprises polyester polyol, MEK, isocyanate, a trifunctional group chain extender, a cross-linking agent, a catalyst, a small molecular chain extender, EAC and AC.

Preferably, the environment-friendly heat-resistant single-component pu is prepared from the following main components: 300 parts of polyester polyol 270-one, 300-500 parts of MEK, 16-18 parts of isocyanate, 0.4-0.7 part of trifunctional chain extender, 0.03-0.1 part of cross-linking agent, 0.04-0.08 part of catalyst, 0.4-1 part of micromolecular chain extender, 300-400 parts of EAC and 600-1000 parts of AC.

The preparation method of the environment-friendly heat-resistant single-component pu comprises the following steps:

the first step is as follows:

adding 270 parts of polyester polyol into a reaction bottle, heating to 110-120 ℃ to start melting, stirring at low speed and vacuumizing for 30min after complete melting.

The second step is that:

cooling to 80-85 ℃, adding 150 parts of MEK, 16.8 parts of HDI, 0.6 part of TMP, 0.08 part of triethanolamine and 0.04-0.08 part of bismuth catalyst into the reaction bottle, and starting to react for 3-4 hours.

The second step is that:

and adding BDO and HDO in 0.1-1 part and MEK in 200 parts in steps, and reacting for 1-2 hours.

The second step is that:

cooling to below 50 ℃, adding 300-400 parts of EAC and 600-1000 parts of AC to dilute the reaction product.

Preferably, the preparation method of the environment-friendly heat-resistant single-component pu comprises the following second preparation method:

the first step is as follows:

adding 270 parts of polyester polyol into a reaction bottle, heating to 110-120 ℃ to start melting, stirring at low speed and vacuumizing for 30min after complete melting;

the second step is that:

cooling to 80-85 ℃, adding 150 parts of MEK, 16.7 parts of HDI, 0.6 part of TMP, 0.5-1 part of N3300 and 0.04-0.08 part of bismuth catalyst into a reaction bottle, and starting to react for 3-4 hours;

the third step:

adding 0.1-1 part of BDO/HDO and 200 parts of MEK step by step, and reacting for 1-2 hours;

the fourth step:

cooling to below 50 ℃, adding 300-400 parts of EAC and 600-1000 parts of AC to dilute the reaction product.

The beneficial effects are as follows:

when the environment-friendly heat-resistant single-component pu and the preparation method thereof are used for bonding shoe materials, the environment-friendly heat-resistant single-component pu can be used without being matched with a curing agent, and has better initial adhesive property and heat resistance; the pu glue does not contain a triphenyl solvent, so that the pu glue is prevented from invading a human body, causing the body damage of workers due to the fact that high-concentration gas is inhaled in a short time or low-concentration gas is inhaled in a long time, and causing acute or chronic poisoning.

Drawings

FIG. 1 is a table showing the raw material mixture ratio of the polyurethane adhesive for shoes;

FIG. 2 is a schematic diagram showing the effect of the addition of the chain extender on the overall performance of pu adhesives.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, an environmentally friendly heat resistant mono-component pu includes polyester polyol, MEK, isocyanate, a trifunctional chain extender, a cross-linking agent, a catalyst, a small-molecule chain extender, EAC, and AC.

Wherein, a heat-resisting type of environmental protection single component pu, pu glues each component main component and contains: 300 parts of polyester polyol 270-one, 300-500 parts of MEK, 16-18 parts of isocyanate, 0.4-0.7 part of trifunctional chain extender, 0.03-0.1 part of cross-linking agent, 0.04-0.08 part of catalyst, 0.4-1 part of micromolecular chain extender, 300-400 parts of EAC and 600-1000 parts of AC.

The preparation method of the environment-friendly heat-resistant single-component pu comprises the following steps:

the first step is as follows:

adding 270 parts of polyester polyol into a reaction bottle, heating to 110-120 ℃ to start melting, stirring at low speed and vacuumizing for 30min after complete melting.

The second step is that:

cooling to 80-85 ℃, adding 150 parts of MEK, 16.8 parts of HDI, 0.6 part of TMP, 0.08 part of triethanolamine and 0.04-0.08 part of bismuth catalyst into the reaction bottle, and starting to react for 3-4 hours.

The second step is that:

and adding BDO and HDO in 0.1-1 part and MEK in 200 parts in steps, and reacting for 1-2 hours.

The second step is that:

cooling to below 50 ℃, adding 300-400 parts of EAC and 600-1000 parts of AC to dilute the reaction product.

The preparation method of the environment-friendly heat-resistant single-component pu comprises the following second preparation method:

the first step is as follows:

adding 270 parts of polyester polyol into a reaction bottle, heating to 110-120 ℃ to start melting, stirring at low speed and vacuumizing for 30min after complete melting;

the second step is that:

cooling to 80-85 ℃, adding 150 parts of MEK, 16.7 parts of HDI, 0.6 part of TMP, 0.5-1 part of N3300 and 0.04-0.08 part of bismuth catalyst into a reaction bottle, and starting to react for 3-4 hours;

the third step:

adding 0.1-1 part of BDO/HDO and 200 parts of MEK step by step, and reacting for 1-2 hours;

the fourth step:

cooling to below 50 ℃, adding 300-400 parts of EAC and 600-1000 parts of AC to dilute the reaction product.

In conclusion, the pu adhesive prepared by the invention can be used without being matched with a curing agent when being attached to shoe materials, and has better initial adhesive property and heat resistance; the pu glue does not contain a triphenyl solvent, so that the pu glue is prevented from invading a human body, causing the body damage of workers due to the fact that high-concentration gas is inhaled in a short time or low-concentration gas is inhaled in a long time, and causing acute or chronic poisoning.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.