阅读说明：本技术 一种废旧聚氨酯发泡混凝土保温墙体材料的制作方法 (Method for manufacturing waste polyurethane foam concrete thermal insulation wall material ) 是由 姜贵全 张德智 牛伯羽 庞久寅 常广利 曲广雷 于 2020-12-23 设计创作，主要内容包括：本发明是一种废旧聚氨酯发泡混凝土保温墙体材料的制作方法,聚氨酯(PU)是一种新兴的有机高分子材料,因其优良的性能而被广泛应用,但是随之而来的就是大量的废料产生,常用的聚氨酯二次利用方法不光成本高,而且对环境有一定的负影响,本发明制作了一种独有的硅酸盐水泥发泡技术和聚氨酯表面处理技术,把处理后的聚氨酯填充到发泡水泥当中,制成新型废旧聚氨酯发泡混凝土保温砌块材料,不光能处理聚氨酯生产过程中的废料,还能处理已经成型的废旧聚氨酯废料,制成的新型保温砌块材料,不光对人体无害,无二次污染,而且环保利废,保温隔热,用在建筑围护结构中还能提高居住的舒适性等优点。(The invention relates to a method for preparing a waste polyurethane foam concrete thermal insulation wall material, Polyurethane (PU) is a new organic polymer material and is widely applied due to excellent performance, but a large amount of waste materials are generated, the common polyurethane secondary utilization method has high cost, but also has certain negative influence on the environment, the invention produces a unique portland cement foaming technology and polyurethane surface treatment technology, the treated polyurethane is filled into the foaming cement, the novel waste polyurethane foaming concrete thermal insulation building block material prepared can not only treat waste materials in the production process of polyurethane but also treat molded waste polyurethane waste materials, and the prepared novel thermal insulation building block material is not harmful to human bodies and has no secondary pollution, and the building enclosure structure has the advantages of environmental protection, waste utilization, heat preservation, heat insulation, improvement of living comfort and the like when used in the building enclosure structure.)

1. A method for preparing a waste polyurethane foam concrete thermal insulation wall material is characterized in that a waste polyurethane mixture is prepared by crushing waste polyurethane into 20-40 parts of particles with different particle diameters, 5-8 parts of nano silica aerogel powder, 5-8 parts of dimethyl phosphate, 20-30 parts of elastic emulsion styrene-acrylic emulsion, 2-6 parts of diethyl phosphate, 5-10 parts of charcoal powder and 5-10 parts of fly ash by mass, and mixing the above materials together by a stirrer for later use.

2. The waste polyurethane according to claim 1 is prepared by mixing with special cement slurry, wherein the mixture is prepared by mixing, by mass, 1-2 parts of potassium methyl silicate, 1-2 parts of polyvinyl alcohol, 2-5 parts of polyacrylamide, 3-4 parts of triethanolamine, 4-5 parts of melamine, 5-10 parts of polyacrylate emulsion, 3-8 parts of reinforcing fiber, 5-10 parts of silica fume, 160 parts of 42.5 silicate cement or 100 parts of 42.5 fast hardening sulphoaluminate cement, 80-120 parts of tap water, and 20-30 parts of the waste polyurethane mixture according to claim 1, and the waste polyurethane cement slurry is prepared for later use.

3. The manufacture of the waste polyurethane foam concrete thermal insulation wall material according to claim 2 further needs to prepare a unique foaming agent, wherein the foaming agent comprises, by mass, 0.1-1 part of lauryl alcohol, 0.5-1 part of soda ash, 1-2 parts of sodium dodecyl sulfate, 0.1-0.4 part of sodium dodecyl benzene sulfonate, 1-5 parts of styrene-butadiene emulsion, 1-3 parts of ethylene-vinyl acetate, 10-15 parts of polyvinyl acetate emulsion, 1-3 parts of latex powder, 1-5 parts of anhydrous calcium chloride, 1-2 parts of potassium methyl silicate, 0.5-2 parts of sodium polyacrylate, 0.1-0.6 part of calcium lignosulfonate, 2-4 parts of alpha-dilute sodium xanthate, 4-8 parts of water-soluble sodium silicate, 3-8 parts of sodium carbonate peroxide and 300 parts of tap water, and is diluted, stirred together, mixed uniformly and placed in a foaming high-pressure machine to be mixed with the foaming agent 2 to prepare a foaming mixture, and putting the mixture into a mould to prepare the waste polyurethane foam concrete thermal insulation wall material.

The technical field is as follows:

the invention relates to the field of constructional engineering, in particular to a method for manufacturing a waste polyurethane foam heat-preservation concrete block material with light weight, high strength, heat preservation, heat insulation, noise reduction, sound insulation, high durability and high fire resistance.

Technical background:

polyurethane articles are foams with a wide variety of morphologies and have a wide range of applications, such as: in many fields such as automobile manufacturing, electric appliance manufacturing, transportation, civil engineering and construction, the following byproduct waste materials are also many, the shape of the formed polyurethane is difficult to reverse, the natural decomposition difficulty is also large, and great burden is brought to the environment.

The invention utilizes a harmless chemical treatment method to treat the waste polyurethane, and the treated polyurethane is mixed with a special portland cement material to prepare the environment-friendly heat-insulating wall material.

The invention content is as follows:

the invention utilizes a chemical method to carry out chemical treatment on the waste polyurethane, the treated waste polyurethane has certain disordered cross-linking strength, no chemical volatile matter pollution, and can also carry out hydration reaction with Portland cement, thereby solving the problems of difficult utilization, low application value and the like of the waste polyurethane, thoroughly solving the defect that the waste polyurethane can not be reused in a large area, reducing the dependence of a building on natural resources in the construction period, reducing the problems of high building energy consumption and the like of the building in the operation period by the application of the invention.

Polyurethane is crushed by a ball mill to prepare light aggregate with different thicknesses of 1 MM-50 MM, and the light aggregate is sieved by square-hole sieves of 1.18MM, 2.50MM, 5.00MM, 10.00MM, 16.00MM, 20.00MM, 25.00MM, 31.50MM, 40.00MM and 50.00MM, and the fineness modulus of the light particles of the waste polyurethane is controlled in uniform and continuous gradation, so that the minimum clearance of the crushed particles of the waste polyurethane is ensured, and uniform and dense cement slurry is facilitated.

20-40 parts of waste polyurethane crushed particles, 5-8 parts of nano silicon dioxide aerogel powder, 5-8 parts of dimethyl phosphate, 20-30 parts of styrene-acrylic emulsion, 2-6 parts of diethyl phosphate, 5-10 parts of charcoal powder and 5-10 parts of fly ash are mixed together by a stirrer and then are dried, and the moisture content in gaps between the materials is controlled to be about 5-10% for later use.

Because the waste polyurethane has low strength, good toughness and light density, the silicate cement for mixing is specially treated to increase the compressive strength of the cement, ensure that the waste polyurethane mixture can be uniformly and compactly combined with the silicate cement, and the waste polyurethane cement is prepared by mixing 1-2 parts of methyl potassium silicate, 1-2 parts of polyvinyl alcohol powder, 3-4 parts of triethanolamine, 4-5 parts of melamine, 5-10 parts of polyacrylate emulsion, 3-8 parts of reinforcing fiber, 5-10 parts of silica fume, 42.5 silicate cement or 110-150 parts of 42.5 quick-hardening sulphoaluminate cement, 80-120 parts of tap water and 20-30 parts of the waste polyurethane cement in the mixing part 1 in parts by mass.

Because the waste polyurethane foam concrete thermal insulation wall material is an ultra-light material, and meanwhile, the structural characteristics of the waste polyurethane and the energy-saving aim of the invention are achieved, the silicate cement is required to be specially treated to prepare a special foam cement slurry mixture, and the lowest density, uniform closed pores and the like are ensured. The foaming agent is characterized by comprising, by mass, 0.1-1 part of lauryl alcohol, 0.5-1 part of soda ash, 3-5 parts of sodium dodecyl benzene sulfonate, 10-15 parts of polyvinyl acetate emulsion, 1-2 parts of methyl potassium silicate, 0.5-2 parts of sodium polyacrylate, 0.1-0.6 part of calcium lignosulfonate, 2-4 parts of alpha-dilute sodium xanthate (powder), 4-8 parts of water-soluble sodium silicate, 3-8 parts of sodium peroxycarbonate and 400 parts of tap water, uniformly stirring and mixing the components, putting the components into a high-pressure foaming machine for foaming, physically foaming and mixing the components with waste polyurethane cement paste to prepare a foamed waste polyurethane cement paste mixture, and putting the foamed polyurethane cement paste mixture into a mold to prepare the waste polyurethane foamed concrete thermal insulation wall material.

The specific implementation method comprises the following steps:

embodiment 1

Polyurethane is crushed by a ball mill to prepare light aggregate with different thicknesses of 1MM to 50MM, the light aggregate is sieved by square-hole sieves of 1.18MM, 2.50MM, 5.00MM, 10.00MM, 16.00MM, 20.00MM, 25.00MM, 31.50MM, 40.00MM and 50.00MM, and the fineness modulus of the light particles of the waste polyurethane is controlled in uniform continuous gradation, so that the minimum particle gap of crushed waste polyurethane is ensured, and the strength after the cement slurry is hardened is ensured.

20-40 parts of waste polyurethane crushed particles, 5-8 parts of nano silicon dioxide aerogel powder, 5-8 parts of dimethyl phosphate, 20-30 parts of styrene-acrylic emulsion, 2-6 parts of diethyl phosphate, 5-10 parts of charcoal powder and 5-10 parts of fly ash, wherein the waste polyurethane crushed particles, the nano silicon dioxide aerogel powder, the dimethyl phosphate, the styrene-acrylic emulsion, the diethyl phosphate, the charcoal powder and the fly ash are mixed together by a stirrer and dried in the air, and the water content of the material is controlled to be about 5-10% for later use.

Because the waste polyurethane has low strength, good toughness and light density, the silicate cement for mixing is specially treated to increase the compressive strength of the cement, so that the waste polyurethane mixture can be uniformly and compactly combined with the silicate cement, and the waste polyurethane cement is prepared from 1-2 parts of methyl potassium silicate, 1-2 parts of polyvinyl alcohol powder, 3-4 parts of triethanolamine, 4-5 parts of melamine, 5-10 parts of polyacrylate emulsion, 3-8 parts of reinforcing fiber, 5-10 parts of silica fume, 150 parts of 42.5 silicate cement 110-one, 80-120 parts of tap water and 20-40 parts of the waste polyurethane mixture of claim 1 by mass parts.

The preparation method of the special foaming cement slurry mixture for the waste polyurethane foaming concrete heat-insulating wall material comprises the following steps of taking the mass parts as units, diluting 0.1-1 part of lauryl alcohol, 0.5-1 part of soda ash, 3-5 parts of sodium dodecyl benzene sulfonate, 10-15 parts of polyvinyl acetate emulsion, 1-2 parts of methyl potassium silicate, 0.5-2 parts of sodium polyacrylate, 0.1-0.6 part of calcium lignosulfonate, 2-4 parts of alpha-dilute sodium xanthate (powder), 4-8 parts of water-soluble sodium silicate, 3-8 parts of sodium peroxycarbonate and 400 parts of tap water, stirring and mixing uniformly, placing into a high-pressure foaming machine for foaming, and mixing with the waste polyurethane cement slurry physically, preparing a mixture of foamed waste polyurethane cement paste, putting the mixture into a mould, curing for 28 days, and preparing the waste polyurethane foamed concrete heat-insulating wall material.

Embodiment 2

Polyurethane is crushed by a ball mill to prepare light aggregate with different thicknesses of 1MM to 50MM, the light aggregate is sieved by square-hole sieves of 1.18MM, 2.50MM, 5.00MM, 10.00MM, 16.00MM, 20.00MM, 25.00MM, 31.50MM, 40.00MM and 50.00MM, and the fineness modulus of the light particles of the waste polyurethane is controlled in uniform continuous gradation, so that the minimum particle gap of crushed waste polyurethane is ensured, and the strength after the cement slurry is hardened is ensured.

20-40 parts of waste polyurethane crushed particles, 5-8 parts of nano silicon dioxide aerogel powder, 5-8 parts of dimethyl phosphate, 20-30 parts of styrene-acrylic emulsion, 2-6 parts of diethyl phosphate, 5-10 parts of charcoal powder and 5-10 parts of fly ash, wherein the waste polyurethane crushed particles, the nano silicon dioxide aerogel powder, the dimethyl phosphate, the styrene-acrylic emulsion, the diethyl phosphate, the charcoal powder and the fly ash are mixed together by a stirrer and dried in the air, and the water content of the material is controlled to be about 5-10% for later use.

Because the waste polyurethane has low strength, good toughness and light density, the silicate cement for mixing is specially treated to increase the compressive strength of the cement, ensure that the waste polyurethane mixture can be uniformly and compactly combined with the silicate cement, and the waste polyurethane cement is prepared by mixing 1-2 parts of methyl potassium silicate, 1-2 parts of polyvinyl alcohol powder, 3-4 parts of triethanolamine, 4-5 parts of melamine, 5-10 parts of polyacrylate emulsion, 3-8 parts of reinforcing fiber, 5-10 parts of silica fume, 110-150 parts of 42.5 quick-hardening sulphoaluminate cement, 80-120 parts of tap water and 20-40 parts of the waste polyurethane mixture in the right part 1 in parts by mass to prepare the waste polyurethane cement slurry for later use.

The preparation method of the special foaming cement slurry mixture for the waste polyurethane foaming concrete heat-insulating wall material comprises the following steps of taking the mass parts as units, diluting 0.1-1 part of lauryl alcohol, 0.5-1 part of soda ash, 3-5 parts of sodium dodecyl benzene sulfonate, 10-15 parts of polyvinyl acetate emulsion, 1-2 parts of methyl potassium silicate, 0.5-2 parts of sodium polyacrylate, 0.1-0.6 part of calcium lignosulfonate, 2-4 parts of alpha-dilute sodium xanthate (powder), 4-8 parts of water-soluble sodium silicate, 3-8 parts of sodium peroxycarbonate and 400 parts of tap water, stirring and mixing uniformly, placing into a high-pressure foaming machine for foaming, and mixing with the waste polyurethane cement slurry physically, preparing a mixture of foamed waste polyurethane cement paste, putting the mixture into a mould, curing for 28 days, and preparing the waste polyurethane foamed concrete heat-insulating wall material.