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CN-116997701-B - Roof component

CN116997701BCN 116997701 BCN116997701 BCN 116997701BCN-116997701-B

Abstract

Provided is a roof member having excellent adhesion of a top layer. A roof member has a base material, a polyurethane layer disposed on the base material, and a top layer disposed on the polyurethane layer, at least a part of the polyurethane layer being composed of a foamed polyurethane layer, the top layer containing a fluorine-containing polymer.

Inventors

  • Know all about

Assignees

  • ＡＧＣ株式会社

Dates

Publication Date
20260505
Application Date
20220317
Priority Date
20210319

Claims (11)

  1. 1. A roof member having: A base material, A polyurethane layer disposed on the substrate, and A top layer disposed on the polyurethane layer, At least a portion of the polyurethane layer is comprised of a foamed polyurethane layer, The top layer comprises a fluoropolymer and, The fluoropolymer is a fluoropolymer having a polar crosslinkable group or a crosslinked product of a fluoropolymer having a polar crosslinkable group, The fluoropolymer having polar crosslinkable groups is a fluoropolymer having hydroxyl groups, The hydroxyl value of the fluorine-containing polymer with hydroxyl is 35-65 mgKOH/g.
  2. 2. The roofing member of claim 1, wherein the fluoropolymer has units based on more than 1 monomer selected from the group consisting of vinyl ethers and vinyl esters.
  3. 3. The roof member according to claim 1 or 2, wherein the content of fluorine atoms in the fluorine-containing polymer is 1 to 80 mass%.
  4. 4. The roof member according to claim 1 or 2, wherein the fluoropolymer has a glass transition temperature of 100 ℃ or less.
  5. 5. A roof member according to claim 1 or 2, wherein the fluoropolymer has a crosslinked structure.
  6. 6. A roof element according to claim 1 or 2, wherein the top layer has a glass transition temperature of 100 ℃ or less.
  7. 7. The roof member according to claim 1 or 2, wherein the top layer further comprises a pigment.
  8. 8. A roof element according to claim 1 or 2, wherein the top layer has an elongation of 1.0% or more.
  9. 9. A roof element according to claim 1 or 2, wherein the substrate is slate.
  10. 10. The roof member according to claim 1 or 2, wherein the polyurethane layer has a foamed polyurethane layer and a non-foamed polyurethane layer in this order from the substrate side.
  11. 11. The roof member according to claim 1 or 2, wherein a ratio of the thickness of the top layer to the foamed polyurethane layer is 0.00001 to 1.0.

Description

Roof component Technical Field The present invention relates to roof elements. Background As a method for repairing a roof, there is a method of forming a layer containing a resin on a base material of a roof. Patent document 1 discloses a construction structure in which a heat insulating foamed layer, a reinforcing waterproof layer, and a surface layer are formed on a predetermined roof or other material. Prior art literature Patent literature Patent document 1 Japanese patent application No. 3131191 Disclosure of Invention Problems to be solved by the invention The roof member preferably has good adhesion of the layers. The inventors of the present invention studied the construction structure described in patent document 1, and found that the adhesion of the surface layer (top layer) was insufficient. The present invention provides a roof member having excellent adhesion of a top layer. Solution for solving the problem The present inventors have conducted intensive studies and as a result, have found that the following constitution can solve the problems. [1] A roof member having: A base material, A polyurethane layer disposed on the substrate, and A top layer disposed on the polyurethane layer, At least a part of the polyurethane layer is formed of a foamed polyurethane layer, The top layer comprises a fluoropolymer. [2] The roof member according to [1], wherein the aforementioned fluorine-containing polymer has a unit based on 1 or more monomers selected from the group consisting of vinyl ethers and vinyl esters. [3] The roof member according to [1] or [2], wherein the fluorine atom content in the fluorine-containing polymer is 1 to 80% by mass. [4] The roof member according to any one of [1] to [3], wherein the fluoropolymer has a glass transition temperature of 100 ℃ or lower. [5] The roof member according to any one of [1] to [4], wherein the fluorine-containing polymer has a crosslinked structure. [6] The roof member according to any one of [1] to [5], wherein the fluoropolymer is a fluoropolymer having a polar crosslinkable group or a crosslinked product of a fluoropolymer having a polar crosslinkable group. [7] The roof member according to [6], wherein the fluoropolymer having a polar crosslinkable group is a fluoropolymer having a hydroxyl group. [8] The roof member according to [7], wherein the hydroxyl value of the hydroxyl group-containing fluoropolymer is 20 to 100mgKOH/g. [9] The roof member according to any one of [1] to [8], wherein the glass transition temperature of the top layer is 100 ℃ or lower. [10] The roof member according to any one of [1] to [9], wherein the top layer further contains a pigment. [11] The roof member according to any one of [1] to [10], wherein the elongation of the top layer is 1.0% or more. [12] The roof member according to any one of [1] to [11], wherein the base material is slate. [13] The roof member according to any one of [1] to [12], wherein the polyurethane layer has a foamed polyurethane layer and a non-foamed polyurethane layer in this order from the substrate side. [14] The roof member according to any one of [1] to [13], wherein a ratio of a thickness of the top layer to the foamed polyurethane layer is 0.00001 to 1.0. ADVANTAGEOUS EFFECTS OF INVENTION According to the present invention, a roof member having excellent adhesion of the top layer can be provided. Drawings Fig. 1 is a schematic side view showing an example of a roof member according to the present invention. Detailed Description The meaning of terms in the present invention is as follows. (Meth) acrylate refers to the generic term acrylate and methacrylate. Similarly, (meth) acrylic acid refers to the generic term for acrylic acid and methacrylic acid. The (meth) acrylic resin is a resin formed of a (meth) acrylate-based unit as a main polymer. The unit in the polymer is a generic term for an atomic group directly formed by polymerization of a monomer, based on the monomer 1 molecule and an atomic group obtained by chemically converting a part of the atomic group after polymerization. The content (mol%) of each unit relative to all units contained in the polymer was determined by analyzing the polymer by a nuclear magnetic resonance spectroscopy (NMR) method. The hydroxyl value was measured according to JIS K0070-3 (1992). The glass transition temperature (Tg) of the top layer is the temperature, measured by DMA (dynamic viscoelasticity measurement), indicating the maximum tan delta (loss tangent). The glass transition temperature (Tg) is a value of the intermediate point glass transition temperature measured by a Differential Scanning Calorimeter (DSC) method. The number average molecular weight (Mn) is a value measured by gel permeation chromatography using polystyrene as a standard substance. The thickness of the roof member is a value measured using an eddy current film thickness meter. As an eddy current film thickness meter, for example, sankoudenshi Inc. EDY-5000 can be used. The t