CN109181520B - Thermal repair coating with shape memory function and preparation method thereof - Google Patents

Thermal repair coating with shape memory function and preparation method thereof Download PDF

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Publication number
CN109181520B
CN109181520B CN201811031054.9A CN201811031054A CN109181520B CN 109181520 B CN109181520 B CN 109181520B CN 201811031054 A CN201811031054 A CN 201811031054A CN 109181520 B CN109181520 B CN 109181520B
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shape memory
agent
memory function
coating
solvent
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CN109181520A (en
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周振平
曾显栋
肖�琳
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Nalinwei Nano Technology Nantong Co ltd
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Nalinwei Nano Technology Nantong Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/06—Polyurethanes from polyesters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses a thermal repair coating with a shape memory function and a preparation method thereof. The thermal repair coating with the shape memory function is composed of the following raw materials in percentage by mass: 20-40% of elastic resin, 20-30% of heat-sensitive resin, 10-20% of curing agent, 40-50% of solvent and 2-8% of auxiliary agent. The invention has the advantages that: the prepared thermal repair coating with the shape memory function forms a cross-linked network with a soft segment area and a hard segment area after thermal curing, the soft and hard balance ensures that the coating has good strength and flexibility, after the surface of a paint film is scratched or scratched, the scratch can be self-repaired after heat treatment for several seconds, and the coating is restored as new.

Description

Thermal repair coating with shape memory function and preparation method thereof
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a thermal repair coating with a shape memory function.
Background
Shape memory materials are a research hotspot in recent years, and the unique functions of the shape memory materials provide abundant solutions for various industries. In the coating industry, coatings with shape memory function are also rather sought after, but the actual application effect is not ideal, and higher energy is often required to be given to complete the memory deformation, or the preparation process of the coating is complicated. In addition, the degree of shape recovery is not complete, and the weather resistance and stability of the coating are also difficult. If the shape memory thermal-restoration coating which has long-term outdoor durability and can be highly restored by only improving lower energy can be prepared by a simple process, the coating has significant influence on the whole coating industry.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a thermal repair coating with a shape memory function.
The invention also provides a preparation process of the thermal repair coating with the shape memory function.
The purpose of the invention is realized by the following technical scheme.
A thermal repair coating with a shape memory function is composed of the following raw materials in percentage by mass: 20-40% of elastic resin, 20-30% of heat-sensitive resin, 10-20% of curing agent, 40-50% of solvent and 2-8% of auxiliary agent.
The elastic resin consists of 30-60% of acrylic modified polyurethane resin and 40-70% of polyester modified polyurethane resin.
The heat-sensitive resin is polyether modified polyurethane resin. The curing agent is polyisocyanate.
The curing agent is polyisocyanate.
The auxiliary agent comprises 10% of BYK306 leveling agent, 70% of silicon dioxide elastic powder, 10% of DISPERBYK-163 stabilizer and 10% of BYK052 defoaming agent.
The solvent is one or more of ethyl acetate, toluene, xylene, N, N-dimethylformamide and butyl acetate.
The preparation method of the thermal repair coating with the shape memory function comprises the following steps:
(1) adding solvent into a stirring kettle, sequentially adding 0.2-0.8% of BYK052 defoaming agent, 20-40% of elastic resin and 20-30% of heat-sensitive resin under a stirring state, and dispersing at 3000rpm for 1-2 hours at a high speed to obtain the component A.
(2) Uniformly mixing and stirring 40-50% of solvent, 1.4-5.6% of silicon dioxide elastic powder, 0.2-0.8% of BYK052 defoaming agent and 0.2-0.8% of DISPERBYK-163 stabilizing agent, putting into a horizontal sand mill for dispersing, and grinding and dispersing at 2500-3000rpm for 3-5 hours to obtain a component B.
(3) And sequentially adding 10-20% of polyisocyanate curing agent, 42-58% of component B and 0.2-0.8% of BYK306 flatting agent into 40-70% of component A, stirring and feeding at the same time, and dispersing at 3000rpm for 1-2 hours at a high speed of 2000-2 ℃ to obtain the thermal repair coating with the shape memory function.
The invention has the advantages that: the prepared thermal repair coating with the shape memory function forms a cross-linked network with a soft segment area and a hard segment area after thermal curing, the soft and hard balance ensures that the coating has good strength and flexibility, after the surface of a paint film is scratched or scratched, the scratch can be self-repaired after heat treatment (50-60 ℃) for several seconds, and the coating is restored as new.
Detailed Description
The present invention is further illustrated by the following examples, which are provided for the purpose of illustration only and are not intended to be limiting.
Example 1:
a thermal restoration coating with a shape memory function is composed of the following raw materials in percentage by mass: 10% of acrylic acid modified polyurethane resin, 10% of polyester modified polyurethane resin, 15% of polyether modified polyurethane resin, 20% of polyisocyanate, 1% of BYK306 leveling agent, 2% of silica elastic powder, 1% of DISPERBYK-163 stabilizer, 1% of BYK052 defoaming agent and 40% of solvent.
The preparation steps are as follows:
A. adding a solvent into a stirring kettle, sequentially adding a BYK052 defoaming agent, elastic resin and thermosensitive resin under a stirring state, and dispersing at a high speed of 3000rpm for 1 hour to obtain a component A.
B. Uniformly mixing and stirring a solvent, silicon dioxide elastic powder, a BYK052 defoaming agent and a DISPERBYK-163 stabilizing agent, putting the mixture into a horizontal sand mill for dispersing, and grinding and dispersing at 2500rpm for 3 hours to obtain a component B.
C. And (3) sequentially adding a polyisocyanate curing agent, the component B and the BYK306 flatting agent into the component A, stirring and adding at the same time, and dispersing at a high speed of 3000rpm for 1 hour to obtain the thermal repair coating RX-1 with the shape memory function.
Example 2:
a thermal restoration coating with a shape memory function is composed of the following raw materials in percentage by mass: 15% of acrylic acid modified polyurethane resin, 5% of polyester modified polyurethane resin, 20% of polyether modified polyurethane resin, 20% of polyisocyanate, 1% of BYK306 leveling agent, 2% of silica elastic powder, 1% of DISPERBYK-163 stabilizer, 1% of BYK052 defoaming agent and 40% of solvent.
The preparation steps are as follows:
A. adding a solvent into a stirring kettle, sequentially adding a BYK052 defoaming agent, elastic resin and thermosensitive resin under a stirring state, and dispersing at a high speed of 3000rpm for 1 hour to obtain a component A.
B. Uniformly mixing and stirring a solvent, silicon dioxide elastic powder, a BYK052 defoaming agent and a DISPERBYK-163 stabilizing agent, putting the mixture into a horizontal sand mill for dispersing, and grinding and dispersing at 2500rpm for 3 hours to obtain a component B.
C. And (3) sequentially adding a polyisocyanate curing agent, the component B and the BYK306 flatting agent into the component A, stirring and adding at the same time, and dispersing at a high speed of 3000rpm for 1 hour to obtain the thermal repair coating RX-2 with the shape memory function.
Example 3:
a thermal restoration coating with a shape memory function is composed of the following raw materials in percentage by mass: 15% of acrylic acid modified polyurethane resin, 5% of polyester modified polyurethane resin, 20% of polyether modified polyurethane resin, 30% of polyisocyanate, 1% of BYK306 leveling agent, 2% of silica elastic powder, 1% of DISPERBYK-163 stabilizer, 1% of BYK052 defoaming agent and 40% of solvent.
The preparation steps are as follows:
A. adding a solvent into a stirring kettle, sequentially adding a BYK052 defoaming agent, elastic resin and thermosensitive resin under a stirring state, and dispersing at a high speed of 3000rpm for 1 hour to obtain a component A.
B. Uniformly mixing and stirring a solvent, silicon dioxide elastic powder, a BYK052 defoaming agent and a DISPERBYK-163 stabilizing agent, putting the mixture into a horizontal sand mill for dispersing, and grinding and dispersing at 2500rpm for 3 hours to obtain a component B.
C. And (3) sequentially adding a polyisocyanate curing agent, the component B and the BYK306 flatting agent into the component A, stirring and adding at the same time, and dispersing at a high speed of 3000rpm for 1 hour to obtain the thermal repair coating RX-3 with the shape memory function.
Example 4:
a thermal restoration coating with a shape memory function is composed of the following raw materials in percentage by mass: 10% of acrylic acid modified polyurethane resin, 10% of polyester modified polyurethane resin, 20% of polyether modified polyurethane resin, 30% of polyisocyanate, 1% of BYK306 leveling agent, 2% of silica elastic powder, 1% of DISPERBYK-163 stabilizer, 1% of BYK052 defoaming agent and 40% of solvent.
The preparation steps are as follows:
A. adding a solvent into a stirring kettle, sequentially adding a BYK052 defoaming agent, elastic resin and thermosensitive resin under a stirring state, and dispersing at a high speed of 3000rpm for 1 hour to obtain a component A.
B. Uniformly mixing and stirring a solvent, silicon dioxide elastic powder, a BYK052 defoaming agent and a DISPERBYK-163 stabilizing agent, putting the mixture into a horizontal sand mill for dispersing, and grinding and dispersing at 2500rpm for 3 hours to obtain a component B.
C. And (3) sequentially adding a polyisocyanate curing agent, the component B and the BYK306 flatting agent into the component A, stirring and adding at the same time, and dispersing at a high speed of 3000rpm for 1 hour to obtain the thermal repair coating RX-4 with the shape memory function.
Example 5:
a thermal restoration coating with a shape memory function is composed of the following raw materials in percentage by mass: 5% of acrylic acid modified polyurethane resin, 15% of polyester modified polyurethane resin, 20% of polyether modified polyurethane resin, 20% of polyisocyanate, 1% of BYK306 leveling agent, 2% of silica elastic powder, 1% of DISPERBYK-163 stabilizer, 1% of BYK052 defoaming agent and 40% of solvent.
The preparation steps are as follows:
A. adding a solvent into a stirring kettle, sequentially adding a BYK052 defoaming agent, elastic resin and thermosensitive resin under a stirring state, and dispersing at a high speed of 3000rpm for 1 hour to obtain a component A.
B. Uniformly mixing and stirring a solvent, silicon dioxide elastic powder, a BYK052 defoaming agent and a DISPERBYK-163 stabilizing agent, putting the mixture into a horizontal sand mill for dispersing, and grinding and dispersing at 2500rpm for 3 hours to obtain a component B.
C. And (3) sequentially adding a polyisocyanate curing agent, the component B and the BYK306 flatting agent into the component A, stirring and adding at the same time, and dispersing at a high speed of 3000rpm for 1 hour to obtain the thermal repair coating RX-5 with the shape memory function.
Examples sample test results:
sample numbering Antifouling properties Thermal repair performance
RX-1 +++ Complete thermal repair of scratches
RX-2 +++ Complete thermal repair of scratches
RX-3 ++ Complete thermal repair of scratches
RX-4 ++ Complete thermal repair of scratches
RX-5 ++ Complete thermal repair of scratches
Note: the thermal repair performance test conditions were that the copper brush was stroked against the sample under a pressure of 2 kg. The samples were then heat treated (50-60 degrees) for 5 seconds.

Claims (3)

1. A thermal repair coating with a shape memory function is characterized in that: the composite material consists of the following raw materials in percentage by mass: 20-40% of elastic resin, 20-30% of heat-sensitive resin, 10-20% of curing agent, 40-50% of solvent and 2-8% of auxiliary agent; the auxiliary agent consists of 10% of BYK306 leveling agent, 70% of silicon dioxide elastic powder, 10% of DISPERBYK-163 stabilizer and 10% of BYK052 defoaming agent; the sum of the mass percentages of the raw materials is 100 percent;
the elastic resin consists of 30-60% of acrylic modified polyurethane resin and 40-70% of polyester modified polyurethane resin;
the heat-sensitive resin is polyether modified polyurethane resin; the curing agent is polyisocyanate.
2. The thermal restoration coating with the shape memory function as claimed in claim 1, wherein: the solvent is one or more of ethyl acetate, toluene, xylene, N, N-dimethylformamide and butyl acetate.
3. A method for preparing the heat-restoration coating with shape memory function as claimed in claim 1 or 2, characterized in that: the method comprises the following steps:
(1) adding a solvent into a stirring kettle, sequentially adding a BYK052 defoaming agent, elastic resin and heat-sensitive resin under a stirring state, and dispersing at a high speed of 3000rpm for 1-2 hours to obtain a component A;
(2) uniformly mixing and stirring a solvent, silicon dioxide elastic powder, a BYK052 defoaming agent and a DISPERBYK-163 stabilizing agent, putting the mixture into a horizontal sand mill for dispersion, and grinding and dispersing the mixture at 2500-3000rpm for 3-5 hours to obtain a component B;
(3) and (3) sequentially adding a polyisocyanate curing agent, the component B and the BYK306 flatting agent into the component A, stirring and adding the materials, and dispersing at the high speed of 3000rpm of 2000-2 hours to obtain the thermal repair coating with the shape memory function.
CN201811031054.9A 2018-09-05 2018-09-05 Thermal repair coating with shape memory function and preparation method thereof Active CN109181520B (en)

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CN109181520B true CN109181520B (en) 2021-09-10

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101921382B (en) * 2010-09-17 2012-07-04 上海交通大学 Method for preparing shape memory polyurethane resin
CN107001557A (en) * 2014-12-15 2017-08-01 三井化学株式会社 Self-repairability polyurethane resin raw material, self-repairability polyurethane resin, self-repairability coating material, self-repairability elastomeric material, the manufacture method of the manufacture method of self-repairability polyurethane resin raw material and self-repairability polyurethane resin
CN105713497A (en) * 2015-12-18 2016-06-29 广州源辉化工有限公司 Immediate restoration paint for mobile terminal and spraying method thereof
CN106800878A (en) * 2016-12-30 2017-06-06 佛山佛塑科技集团股份有限公司 A kind of plastic sheeting and its coating of oil-stain-preventing selfreparing
CN106832205B (en) * 2017-01-20 2019-06-18 长兴材料工业（广东）有限公司 A kind of shape memory modified polyurethane resin and preparation method thereof

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