阅读说明：本技术 一种粘接墙体与聚氨酯软泡的自喷胶制备方法 (Preparation method of self-spraying adhesive for bonding wall and polyurethane flexible foam ) 是由 秦俭 龚小平 黄建 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种,聚氨酯泡沫与不平整墙体,粘接的自喷胶,及其制备方法。该自喷胶可实现,聚氨酯保温层与不平整墙体的无间粘接,且同时释放压缩产生的应力。适合双聚氨酯保温装饰一体板之施工使用。(The invention discloses a self-spraying adhesive for bonding polyurethane foam and an uneven wall body and a preparation method thereof. The self-spraying adhesive can realize the seamless bonding of the polyurethane heat-insulating layer and an uneven wall body, and simultaneously release the stress generated by compression. Is suitable for the construction of double polyurethane heat-insulating and decorating integrated plates.)

1. A polyurethane heat-insulating decorative integrated board is a self-spraying adhesive for adhering to wall without gap, and is prepared through spraying said adhesive onto wall, pressing the heat-insulating polyurethane layer on wall by 10-30 sin while releasing compressive stress, and sequentially adding trichloroethylene (5-15%), 2-vinyloxyethanol (6-12%), NHK (0.1-0.5%), toluene (3-5%), polyether polyol (25-35%), polyol (12-18%) and polyol (6 Kg/cm) to high-pressure tank²Compressing air to finish the preparation; the high-pressure tank is a handheld high-pressure tank with a nozzle and the pressure resistance of which is more than or equal to 1.0 MPa; the above percentages are volume ratios; the above materials are commercially pure.

Technical Field

The building field, building outer wall heat preservation intergral template construction is glued, and heat preservation decoration intergral template bonding is glued.

Background

Heat preservation and decoration integrated board is widely applied to modern buildings. The outstanding advantage lies in that the double functions of heat preservation and facade decoration are integrated. However, the heat-insulating and decorating integrated board has a few unsatisfactory parts, such as: the safety hazard of the integrated board can be caused by the back wind pressure formed by dry hanging.

Disclosure of Invention

Wind pressure from the front is easily endurable for the integrated board. The integrated board is supported by the strong supporting force of the wall body, and can effectively meet the wind pressure from the front. However, the wind pressure from the back is fatal, once the integrated board loses the support of the wall body, the veneer layer, the mounting connecting pieces and the like of the integrated board become extremely fragile, and the integrated board is easy to fall off and fall off due to back pressure. In a city with high buildings, the falling off of the integrated plate is a disaster which can not be borne by any person. The back pressure is mainly caused by the gap between the dry hanging wallboard and the wall body, the chimney effect is caused, the wall body cannot be airtight due to construction, materials and the like, and the dry hanging integrated board is subjected to wind pressure from the back due to ventilation and the chimney effect. The best method for solving the back pressure is to realize the non-interval installation between the integrated plate and the wall body.

The soft and hard double-foam polyurethane heat-insulation decorative integrated board has the advantages that the elasticity of the lower layer of soft polyurethane can be tightly pressed on the uneven wall surface, and seamless connection is realized. But the integral plate is subjected to a spring back stress caused by compression. The resilience stress imposes a great deal of useless burden on the integrated plate strip, such as strength, flatness, structural parts and the like. The seamless connection with the wall body can be realized, and the stress release can be realized, which is the core problem to be solved by the technology. If the soft polyurethane can promote the hardening of the soft polyurethane and can be bonded with a wall body, the technical scheme is more perfect.

Through experimental trials, the technical scheme is expected to be realized by preparing a glue. The dissolution of the polyurethane flexible foam material was investigated. The dissolution of polyurethane foam was studied, the process of dissolving polyurethane compressed instead of stressed by a trace amount of solvent was studied, and the change of foam structure generated when compressive stress was released by dissolution was studied. The method of re-crosslinking after dissolution of the soft foam polyurethane was investigated. The reason that the volatilization of the solvent damages the foam structure is researched, the combination of various solvents is tried, and the method for generating the rigid foam by re-crosslinking is researched. The following optimized mixture ratio is obtained through induction: the technical scheme is realized by using 5-15% of trichloroethylene, 6-12% of 2-ethyleneoxy ethanol, 0.1-0.5% of NHK550, 3-5% of methylbenzene, 25-35% of polyether polyol and 12-18% of polyol, and further using a handheld high-pressure tank as a container, matching with a nozzle and adding compressed air to prepare the self-spraying adhesive for bonding the wall body and the polyurethane flexible foam. The production process is optimized by adding 5-15% of trichloroethylene, 6-12% of 2-ethyleneoxy ethanol, 0.1-0.5% of NHK550, 3-5% of toluene, 25-35% of polyether polyol, 12-18% of polyol and air, and pressurizing to 6Kg/cm²The preparation is completed.

Detailed description of the preferred embodiment 1

The construction is combined by the self-spraying glue mode. A preparation method of self-spraying glue for bonding a wall body and a polyurethane soft foam is elaborated.

Material preparation

Trichloroethylene, 2-ethyleneoxy ethanol, NHK550, toluene, polyether polyol, 200mL hand-held autoclave with nozzle.

Equipment preparation

An air compressor.

Preparation of self-spraying glue

Adding 20mL of trichloroethylene, 24mL of 2-ethyleneoxy ethanol, 1mL of NHK550, 8mL of toluene, 65mL of polyether polyol and 30mL of polyalcohol into a 200mL high-pressure tank in sequence, introducing compressed air, and pressurizing to 6Kg/cm²And finishing the preparation of the self-spraying glue.

Construction and testing

4 pieces of 1200X 600 double polyurethane heat preservation metal surface integrated plates are arranged on the wall body with the unevenness and the difference of about 10 mm. And (3) taking a standard of 15mm compression, installing and fixing an expansion bolt on the wall, and spraying the prepared self-spraying glue in sequence. And tightly pressing and installing the integrated plate by using an expansion bolt. And after 30min, the expansion bolt is removed.

The result of the detection

The integrated plate does not rebound and fall off.