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CN-121973530-A - Polyurethane composite coiled material and preparation method and application thereof

CN121973530ACN 121973530 ACN121973530 ACN 121973530ACN-121973530-A

Abstract

The invention relates to the technical field of functional coiled materials, in particular to a polyurethane composite coiled material, a preparation method and application thereof. The invention provides a polyurethane composite coiled material which comprises a bottom layer, a middle layer and a surface layer which are sequentially arranged, wherein the preparation raw materials of the surface layer comprise (3-4) 1 parts by mass of a component A and a component B, the component B is isocyanate, and the component A comprises, by weight, 25-35 parts of bio-based polyol, 45-55 parts of flame-retardant polyester polyol, 3-9 parts of polyester polyol, 3-8 parts of alcohol chain extender, 1-5 parts of delayed type heat-sensitive catalyst, 1-12 parts of auxiliary agent and 0-5 parts of color paste. The characteristics of the important components in the surface layer and the middle layer and the respective proportion of the important components are different, the surface layer and the middle layer with different characteristics are obtained by means of specific component collocation and component proportion, and the two components are compounded together to further improve the performance of the composite coiled material under the synergistic effect.

Inventors

  • ZHANG CHAOSHE

Assignees

  • 浙江港流高分子科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260120

Claims (10)

  1. 1. The high-durability polyurethane composite coiled material is characterized by comprising a bottom layer, a middle layer and a surface layer which are sequentially arranged, wherein the surface layer is prepared from (3-4) 1-weight-ratio components A and B, the component B is isocyanate, the component A comprises, by weight, 25-35 parts of bio-based polyol, 45-55 parts of flame-retardant polyester polyol, 3-9 parts of polyester polyol, 3-8 parts of alcohol chain extender, 1-5 parts of delayed type heat-sensitive catalyst, 1-12 parts of auxiliary agent and 0-5 parts of color paste, and the alcohol chain extender has a symmetrical structure.
  2. 2. The high durability polyurethane composite coil of claim 1, wherein the polyester polyol is at least one of XCP-244, XCP-3000H, or XCP-R4500H; preferably, the alcohol chain extender is selected from at least one of 1, 4-butanediol or 1, 6-hexanediol; preferably, the delayed thermal catalyst is selected from at least one of S01, S019 or S130; preferably, the isocyanate comprises hexamethylene diisocyanate based polyisocyanate trimer and isophorone diisocyanate monomer; Preferably, the mass ratio of the hexamethylene diisocyanate-based polyisocyanate trimer to the isophorone diisocyanate monomer is (1-2): 1.
  3. 3. The high durability polyurethane composite coil of claim 1 wherein the bio-based polyol is a vegetable oil-based polyol; preferably, the vegetable oil-based polyol is selected from at least one of castor oil polyol, soybean oil polyol, palm oil polyol, olive oil polyol; Preferably, the castor oil polyol is of a type selected from at least one of CF-275T, CF-220T or CF-260T; preferably, the type of the flame retardant polyester polyol is selected from at least one of PF-2012, PF-2021 and PF-2014; preferably, the auxiliary agent comprises at least one of a leveling agent, an antifoaming agent and a water scavenger.
  4. 4. The high-durability polyurethane composite coiled material according to any one of claims 1 to 3, wherein the preparation raw materials of the middle layer comprise (2 to 2.5) 1 parts by weight of component C and component D, wherein the component D is isocyanate, and the component C comprises, by weight, 10 to 30 parts of bio-based polyol, 15 to 35 parts of flame-retardant polyester polyol, 1 to 10 parts of polycaprolactone polyol, 5 to 20 parts of aromatic diamine chain extender, 10 to 15 parts of flame retardant, 20 to 50 parts of inorganic filler, 1 to 10 parts of instant heat-sensitive catalyst, 0 to 5 parts of color paste and 0 to 15 parts of auxiliary agent.
  5. 5. The high durability polyurethane composite coil according to claim 4 wherein the bio-based polyol is a vegetable oil-based polyol; preferably, the vegetable oil-based polyol is selected from at least one of castor oil polyol, soybean oil polyol, palm oil polyol, olive oil polyol; preferably, the castor oil polyol is selected from at least one of CF-275T, CF-220T or CF-260T; Preferably, the type of the flame retardant polyester polyol is at least one selected from PF-2021, PF-2014 and PF-2012; Preferably, the polycaprolactone polyol is polycaprolactone polyol PCL-2053; Preferably, the aromatic diamine chain extender is 3, 5-dimethyl thiotoluene diamine; Preferably, the flame retardant is a phosphorus halogen-free flame retardant; Preferably, the inorganic filler is at least one selected from calcium carbonate, talcum powder, aluminum hydroxide, gas silicon and white corundum; Preferably, the particle size of the inorganic filler is 600-1500 meshes; Preferably, the instant thermosensitive catalyst is S12; preferably, the auxiliary agent comprises at least one of a leveling agent, a defoaming agent and a water scavenger; preferably, the isocyanate comprises hexamethylene diisocyanate based polyisocyanate trimer and isophorone diisocyanate monomer; preferably, the mass ratio of the hexamethylene diisocyanate-based polyisocyanate trimer to the isophorone diisocyanate monomer is (0.5-2): 1.
  6. 6. The high-durability polyurethane composite coiled material according to any one of claims 1 to 3, wherein the preparation raw materials of the bottom layer comprise 1 part by mass of component E and component F, wherein the component E is isocyanate, and the component F comprises 1 to 10 parts by weight of bio-based polyol, 10 to 20 parts by weight of flame-retardant polyester polyol, 20 to 30 parts by weight of polyester polyol, 10 to 15 parts by weight of flame retardant, 20 to 50 parts by weight of inorganic filler, 0 to 5 parts by weight of color paste and 0 to 15 parts by weight of auxiliary agent.
  7. 7. The high durability polyurethane composite coil according to claim 6, wherein the bio-based polyol is a castor oil polyol of type CF-275T; preferably, the type of the flame retardant polyester polyol is selected from at least one of PF-2021, PF-2014 or PF-2012; Preferably, the polyester polyol is of model HDPOL-5520M; Preferably, the inorganic filler is at least one selected from calcium carbonate, talcum powder, aluminum hydroxide, gas silicon and white corundum; preferably, the particle size of the inorganic filler is 600-1200 meshes; preferably, the flame retardant is at least one selected from ammonium polyphosphate, magnesium hydroxide, aluminum hydroxide, tri (2-chloropropyl) phosphate, phosphorus halogen-free flame retardant, nano carbon black and floating beads; preferably, the auxiliary agent comprises at least one of a leveling agent, a defoaming agent and a water scavenger; preferably, the isocyanate is diphenylmethane diisocyanate.
  8. 8. A method for producing the high-durability polyurethane composite coiled material according to any one of claims 1 to 7, comprising: s1, mixing the component A, adding the component B to obtain a surface layer coating, mixing the component C, adding the component D to obtain a middle layer coating, mixing the component E, and adding the component F to obtain a bottom layer coating; S2, coating a surface layer coating on the base film, then thermally curing, and removing the release film to obtain a surface layer; S3, coating a middle layer of paint on the surface layer, and thermally curing to obtain a reinforcing layer, wherein grid cloth is added in the coating process; S4, coating a primer in the middle layer, cooling after heat curing, trimming and rolling to obtain the high-durability polyurethane composite coiled material.
  9. 9. The method according to claim 8, wherein in the step S2, the heat curing is performed by curing at 80 ℃ for 10-30 min, heating to 100 ℃ for 10-30 min, and heating to 120 ℃ for 10-30 min; And/or in the step S3-S4, the heat curing temperature is 80-120 ℃, and the heat curing time is 10-30 min; And/or, in the step S2, the base film is a polyethylene terephthalate film; and/or, in the step S3, the mesh cloth is polyester mesh cloth.
  10. 10. Use of the high-durability polyurethane composite coiled material according to any one of claims 1 to 7 or the high-durability polyurethane composite coiled material prepared by the preparation method according to any one of claims 8 to 9 on a ship floor.

Description

Polyurethane composite coiled material and preparation method and application thereof Technical Field The invention relates to the technical field of functional coiled materials, in particular to a polyurethane composite coiled material, a preparation method and application thereof. Background The marine environment places extremely stringent demands on the durability of the flooring product. The ship is in the corrosive atmosphere with high humidity and high salt fog for a long time, the deck needs to be frequently washed and cleaned, and meanwhile, the possible working conditions such as greasy dirt, chemical splashing and the like need to be dealt with. In addition, continuous vibration and impact during ship operation, and mandatory regulations for fire safety of materials, require excellent durability, mechanical stability and long-term reliability of flooring materials. Currently, commonly used marine floor products, such as wood/wood plastic floors, rubber or plastic sheets, PVC floors, coated floors and the like, have the defect of insufficient durability in practical application. The wood or wood plastic floor is easy to absorb moisture, deform and rot in a humid environment, is inflammable and has short service life. Rubber or plastic sheets also have flammability problems, have poor fatigue resistance, and are prone to permanent deformation or cracking under long-term vibration. PVC floor has poor heat resistance, abrasion resistance and solvent resistance, is easy to scratch, stain penetration, aging embrittlement and other problems, and is difficult to meet the long-term use requirement of ship environment. In the coating type terrace, the epoxy terrace material has contradiction that the hardness and the flexibility are difficult to be compatible, a paint film of the epoxy terrace material is easy to crack and peel due to insufficient toughness, has poor weather resistance, is easy to yellow and pulverize, and influences long-term attractive appearance and protection effect. Although the polyurethane terrace is improved in wear resistance and construction convenience, the field construction quality is greatly influenced by environmental factors, the curing period is longer, and the comprehensive performance of the existing materials, in particular the durability in corrosion resistance, tearing resistance and long-term dynamic load resistance, is still to be improved. Therefore, there is an urgent need in the art to develop a novel ship flooring material having excellent mechanical properties, excellent corrosion and abrasion resistance, good dimensional stability, and efficient construction convenience, so as to overcome the bottleneck of the prior art in terms of long-term durability of flooring products. Disclosure of Invention The invention provides a polyurethane composite coiled material, a preparation method and application thereof, and aims to overcome the defect of poor durability of floors in the prior art. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides a polyurethane composite coiled material which comprises a bottom layer, a middle layer and a surface layer which are sequentially arranged, wherein the surface layer is prepared from (3-4) 1-weight-ratio components A and B, the components B are isocyanate, the components A comprise 25-35 parts by weight of bio-based polyol, 45-55 parts by weight of flame-retardant polyester polyol, 3-9 parts by weight of polyester polyol, 3-8 parts by weight of alcohol chain extender, 1-5 parts by weight of delayed type heat-sensitive catalyst, 1-12 parts by weight of auxiliary agent and 0-5 parts by weight of color paste, and the alcohol chain extender has a symmetrical structure. The composite coiled material provided by the invention is divided into a bottom layer, a middle layer and a surface layer, wherein the surface layer is responsible for the characteristics of wear resistance, scratch resistance, attractive appearance and the like, the middle layer determines the toughness and the strength of the whole composite coiled material, and the bottom layer plays roles of shock absorption and leveling. In the formula of the surface layer, three different types of polyols, namely biological polyol, flame-retardant polyester polyol and polyester polyol, are selected for compounding, so that the soft section main body of the surface layer can be determined. In addition, urethane linkages (-NHCOO-) are formed by reacting an isocyanate with a less reactive alcohol chain extender. The urethane bond has lower cohesive energy and relatively better molecular chain segment movement capability, which is helpful to form a hard segment region with more uniform microstructure and smaller internal stress, and the structure can effectively reduce microcracks caused by internal stress, thereby improving ageing resistance. Meanwhile, the alcohol chain extender has mild reaction and provi