Search

CN-122011990-A - Quick-hardening high-strength adhesive for bonding rock wool-based composite board outer wall and preparation method thereof

CN122011990ACN 122011990 ACN122011990 ACN 122011990ACN-122011990-A

Abstract

The application relates to the technical field of building materials, in particular to a rapid hardening high-strength adhesive for bonding an outer wall of a rock wool-based composite board and a preparation method thereof. The adhesive comprises a component A and a component B, wherein the component A comprises 40-50 parts of E44 epoxy resin, 25-30 parts of polyurethane prepolymer, 10-15 parts of quartz powder, 5-10 parts of calcium carbonate, 0.5-1 part of wood fiber, 1-2 parts of silane coupling agent, 0.1-0.5 part of defoamer, 6-8 parts of polyamide curing agent and 0.5-1 part of DMP. The application accelerates the reaction of epoxy groups and amine hydrogen by matching polyamide curing agents with DMP-30, shortens the gel time, simultaneously matches E44 epoxy resin with polyurethane prepolymer, improves the impact strength by a sea-island structure, avoids the brittle fracture of rock wool interface, and in addition, the polyurethane prepolymer and the E44 epoxy resin react to release heat, improve the initial temperature of the system, accelerate the epoxy curing and mutually match multiple components, thus the prepared adhesive can achieve the effects of rapid hardening and higher strength when being used for the adhesion of rock wool composite board outer walls.

Inventors

  • TANG XUEPING
  • WANG MIN
  • ZHOU LIJUN
  • He Beishan
  • CAO RUI
  • HE MINGQUAN

Assignees

  • 湖南省衡洲建设有限公司

Dates

Publication Date
20260512
Application Date
20260310

Claims (10)

  1. 1. The quick-hardening high-strength adhesive for bonding the rock wool-based composite board outer wall is characterized by comprising a component A and a component B, wherein the component A and the component B comprise the following components in parts by weight: The component A comprises 40-50 parts of E44 epoxy resin, 25-30 parts of polyurethane prepolymer, 10-15 parts of quartz powder, 5-10 parts of calcium carbonate, 0.5-1 part of wood fiber, 1-2 parts of silane coupling agent and 0.1-0.5 part of defoamer; And the component B comprises 6-8 parts of polyamide curing agent and 0.5-1 part of DMP-30.
  2. 2. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 1, wherein the component B further comprises a curing auxiliary agent, and the curing auxiliary agent comprises at least one of 2-ethyl-4-methylimidazole, zinc acetylacetonate and 4-hydroxymethyl benzyl alcohol.
  3. 3. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 2, wherein the curing auxiliary agent is a dual-curing composition of 2-ethyl-4-methylimidazole and zinc acetylacetonate.
  4. 4. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 3, wherein the mass ratio of the 2-ethyl-4-methylimidazole to the zinc acetylacetonate in the dual-curing composition is 2:0.8-1.2.
  5. 5. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 2, wherein the curing auxiliary agent is a tri-curing composition of 2-ethyl-4-methylimidazole, zinc acetylacetonate and 4-hydroxymethyl benzyl alcohol.
  6. 6. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 1, wherein the A component further comprises a reinforcing auxiliary agent, and the reinforcing auxiliary agent comprises at least one of nano silicon dioxide, CTBN toughening agent and zirconia.
  7. 7. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 6, wherein the reinforcing auxiliary agent is a dual reinforcing composition of nano silicon dioxide and CTBN toughening agent.
  8. 8. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 7, wherein the mass ratio of the nano silicon dioxide to the CTBN toughening agent in the dual-reinforcement composition is 4:5-8.
  9. 9. The rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to claim 6, wherein the reinforcing auxiliary agent is a three-reinforcing composition of nano silicon dioxide, CTBN toughening agent and zirconium oxide.
  10. 10. The method for preparing the rapid hardening high strength adhesive for bonding the outer wall of the rock wool-based composite board according to any one of claims 1 to 9, which is characterized by comprising the following steps: The preparation of the component A comprises the steps of heating and stirring the E44 epoxy resin with the formula amount and the polyurethane prepolymer, sequentially adding the quartz powder, the calcium carbonate and the wood fiber with the formula amount, continuously stirring, adding the reinforcing auxiliary agent with the formula amount and the silane coupling agent, dispersing and mixing, adding the defoaming agent, and carrying out vacuum defoaming to obtain the component A; the preparation of the component B, namely stirring and mixing the polyamide curing agent, the DMP-30 and the curing auxiliary agent according to the formula amount to obtain the component B; And (3) respectively and independently storing the component A and the component B to obtain the quick-hardening high-strength adhesive for bonding the rock wool base composite board outer wall.

Description

Quick-hardening high-strength adhesive for bonding rock wool-based composite board outer wall and preparation method thereof Technical Field The application relates to the technical field of building materials, in particular to a rapid hardening high-strength adhesive for bonding an outer wall of a rock wool-based composite board and a preparation method thereof. Background The rock wool is produced with basalt, dolomite, etc. as main material and through high speed centrifugation at 1450 deg.c in an international advanced four-shaft centrifuge to form fiber, spraying certain amount of adhesive, dustproof oil and water repellent, collecting in a cotton collecting machine, pendulum process, spreading in three-dimensional process, solidification and cutting to form rock wool products of different sizes and purposes. Rock wool is widely used as a heat-insulating material in the building and industrial fields. The rock wool base composite board has large area, the traditional adhesive has insufficient bonding strength, and the integral falling off is easy to be caused by gravity or wind pressure (especially high-rise buildings). The construction of the outer wall is carried out in a proper environment (the temperature is more than 5 ℃ and no rain exists), and the influence of weather mutation can be reduced by rapid solidification, so that the single-day paving amount is improved. Therefore, the development of a quick-hardening high-strength adhesive suitable for the adhesion of the rock wool-based composite board outer wall is very necessary. Disclosure of Invention The application provides a quick-hardening high-strength adhesive for bonding a rock wool composite board outer wall, which aims to solve the problems that the adhesive is quick to solidify and has higher bonding strength when the rock wool composite board outer wall is bonded. In a first aspect, the application provides a rapid hardening high strength adhesive for bonding an outer wall of a rock wool-based composite board, which adopts the following technical scheme: The quick-hardening high-strength adhesive for bonding the rock wool-based composite board outer wall comprises a component A and a component B, wherein the component A and the component B comprise the following components in parts by weight: The component A comprises 40-50 parts of E44 epoxy resin, 25-30 parts of polyurethane prepolymer, 10-15 parts of quartz powder, 5-10 parts of calcium carbonate, 0.5-1 part of wood fiber, 1-2 parts of silane coupling agent and 0.1-0.5 part of defoamer; And the component B comprises 6-8 parts of polyamide curing agent and 0.5-1 part of DMP-30. By adopting the technical scheme, the polyamide curing agent is used as a main curing agent, a flexible long-chain structure is provided, the cross-linking brittleness of the epoxy resin is reduced, and meanwhile, the active amine group and the epoxy group react in a ring-opening way, so that medium-speed curing is realized. The DMP-30 accelerator is used as a tertiary amine catalyst to accelerate the reaction of epoxy groups and amine hydrogen and shorten the gel time. The E44 epoxy resin provides a rigid framework and high adhesion, and forms a compact crosslinked network after curing, so that the foundation strength is given. The polyurethane prepolymer is introduced into the flexible chain segment, and stress is dispersed through the sea-island structure, so that the impact strength is improved, and the brittle fracture of a rock wool interface is avoided. In addition, the polyurethane prepolymer contains-NCO groups and can react with-OH groups of epoxy resin to generate an oxazolidone structure, the reaction releases heat obviously, the initial temperature of the system is increased, and the epoxy curing is accelerated. The low-viscosity resin system (E44 epoxy resin and polyurethane prepolymer) can permeate into a rock wool porous structure, and after curing, rivet type mechanical interlocking is formed, and the damage of a bonding interface needs to overcome the mechanical anchoring force. The polyurethane chain segment and the epoxy are rigid and flexible, the thermal expansion coefficient of the adhesive layer is close to that of rock wool, avoiding the debonding risk caused by temperature difference. The application accelerates the reaction of epoxy groups and amine hydrogen by matching polyamide curing agents with DMP-30, shortens the gel time, simultaneously combines E44 epoxy resin with polyurethane prepolymer, disperses stress by a sea island structure, improves impact strength, avoids brittle fracture of rock wool interface, and further, the polyurethane prepolymer and the E44 epoxy resin react to release heat obviously, improve the initial temperature of a system, accelerate epoxy curing, and mutually match multiple components to prepare the adhesive which can achieve rapid hardening and keep higher strength when used for bonding the outer wall of the rock wool base composite board. Preferably