CN111645393A - Automobile interior decoration plate with self-repairing function and preparation method thereof - Google Patents

Automobile interior decoration plate with self-repairing function and preparation method thereof Download PDF

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Publication number
CN111645393A
CN111645393A CN202010357453.5A CN202010357453A CN111645393A CN 111645393 A CN111645393 A CN 111645393A CN 202010357453 A CN202010357453 A CN 202010357453A CN 111645393 A CN111645393 A CN 111645393A
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China
Prior art keywords
parts
self
repairing
aqueous
automobile interior
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CN202010357453.5A
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Chinese (zh)
Inventor
滕腾
杨天博
于洪阳
任晓珊
刘思旸
赵君陆
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FAW Group Corp
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FAW Group Corp
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Priority to CN202010357453.5A priority Critical patent/CN111645393A/en
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/02—Internal Trim mouldings ; Internal Ledges; Wall liners for passenger compartments; Roof liners
    • C—CHEMISTRY; METALLURGY
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    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3206—Polyhydroxy compounds aliphatic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4825—Polyethers containing two hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C08G18/6677—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203 having at least three hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
    • C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
    • C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
    • C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
    • C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C08L75/08—Polyurethanes from polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/536—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

The invention relates to an automobile interior decoration plate with a self-repairing function and a preparation method thereof. The automobile interior decoration plate comprises a plastic base layer and a surface layer which are integrally formed, wherein the surface layer is a self-repairing aqueous polyurethane layer covering the base layer; the invention synthesizes the waterborne polyurethane emulsion with the self-repairing function by adopting a prepolymer method, adds various auxiliary agents to prepare the surface layer slurry, and then adopts a double-material injection molding process to prepare the automobile interior decorative plate with the self-repairing function. The automobile interior decorative plate provided by the invention has certain scratch resistance, can realize self-repairing of a damaged coating at normal temperature, can realize multiple times of repairing of the same part, and effectively solves the problem of scraping and damage of the automobile interior decorative plate in the using process; also can provide different glossiness and excellent weather resistance; and due to the adoption of a spraying-free process, the VOC and air quality in the automobile is effectively improved, and the application value is higher.

Description

Automobile interior decoration plate with self-repairing function and preparation method thereof
Technical Field
The invention relates to the field of automobile interior trim manufacturing, in particular to an automobile interior trim board and a preparation method thereof, and particularly relates to an automobile interior trim board with a self-repairing function and a preparation method thereof.
Background
With economic development and social progress, more and more private cars enter thousands of households. As a part which can be reached by consumers, a plurality of automobile interior decorative plates are inevitably scratched and damaged in the using process, which not only affects the aesthetic feeling of the automobile interior decorative plates and reduces the high-grade feeling of the interior decorative plates, but also is quite unfavorable for the use of the automobile. Therefore, how to repair scratches and damages of the automobile interior trim panel has become a problem to be solved.
At present, the repairing mode of the scratch of the automobile interior decorative plate is basically carried out after the scratch appears in the carriage. When the automobile interior decorative plate is found to have obvious scratches, the common operation in the field is to perform paint repair or spray renovation and color change paint treatment on the plastic surface of the interior decorative plate, however, the mode is not only troublesome and labor-consuming, but also causes the problems of VOC pollution and the like in a period of time; in addition, the problem of warping of the paint layer is easy to occur in a paint repairing mode, once the paint repairing mode is repaired for many times, effective repair cannot be achieved, and only new automobile interior decorative plates can be replaced.
It is appreciated that self-repair techniques are emerging in other areas, such as in-mold decoration, furniture decoration, leather/synthetic leather manufacturing, and car clothing, to provide hope for scratch self-repair of automotive interior trim panels.
CN106432666A discloses a self-repairing film, which comprises a transparent carrier layer and a self-repairing functional layer coated on the transparent carrier layer, wherein the self-repairing functional layer is composed of the following components in parts by weight and is obtained by heat curing: 100 parts of polyol, 40-80 parts of isocyanate, 0.05-0.2 part of catalyst, 0-4 parts of flatting agent and 52-180 parts of solvent; the provided self-repairing film can well solve the problem that cracks exist in the field of in-mold decoration due to overlarge bent angles and meet the application requirement of a flexible display screen on flexibility.
CN109252387A discloses a leather/synthetic leather based on self-repairing waterborne polyurethane and a preparation method thereof, wherein the self-repairing waterborne polyurethane is used as a coating fabric, the leather/synthetic leather with the self-repairing function is prepared according to a dry-process leather/synthetic leather transfer coating process, and the problem of scraping and damage of the leather/synthetic leather in the using process is effectively solved.
CN109517513A discloses a method for manufacturing a normal-temperature self-repairing type waterborne polyurethane automobile garment with a self-extinction effect, which adopts self-extinction normal-temperature self-repairing waterborne polyurethane emulsion to be sprayed on the surface of an automobile to manufacture the normal-temperature self-repairing automobile garment.
Although the above documents have solved the problem of scratch damage repair, it is not negligible that the application field is very different from the automobile interior trim panel, for example, the car clothes disclosed in CN109517513A, although it belongs to the automobile manufacturing field with the automobile interior trim panel, however, it discloses that the water-based polyurethane emulsion is sprayed on the outside of the paint surface of the automobile itself, which is equivalent to the automobile accessory consumption, that is, what we often say, "invisible car clothes", and also, from the structural point of view, it discloses a polyurethane film which is actually coated on the surface of the car clothes, which is different from the rigid polyurethane material of the automobile interior trim panel, and as the car clothes, it belongs to a peelable two-layer structure in the macrostructure, and is also easily warped.
Therefore, how to use the scraping damage repair technology in other fields for reference, and simultaneously ensure that the self-repairing layer is strongly attached to the hard polyurethane material of the automobile interior decorative plate, and the hardness and the wear resistance of the automobile interior decorative plate are improved at one time, becomes a problem which needs to be solved urgently at present.
Disclosure of Invention
In view of the problems in the prior art, the invention provides an automobile interior trim panel with a self-repairing function and a preparation method thereof. The automobile interior decorative plate not only realizes that the automobile interior decorative plate has certain scratch resistance, but also can realize self-repairing of a damaged coating at normal temperature, and the same part can realize multiple times of repairing, thereby effectively solving the problem of scraping and damage of the automobile interior decorative plate in the using process; in addition, the self-repairing aqueous polyurethane layer and the plastic base layer are integrally formed, so that the problem of adhesion between the self-repairing layer and the rigid polyurethane material of the automobile interior panel is solved, and the hardness and the wear resistance of the automobile interior panel are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides an automotive interior trim panel having a self-repairing function, the automotive interior trim panel including a plastic base layer and a surface layer which are integrally formed; the surface layer is a self-repairing aqueous polyurethane layer covering the base layer.
The self-repairing aqueous polyurethane layer covering the base layer is adopted, so that the self-repairing problem of the automobile interior decorative plate is well solved, the automobile interior decorative plate has certain scratch resistance, the self-repairing of a damaged coating can be realized at normal temperature, and the same part can be repaired for multiple times; in addition, the plastic base layer and the surface layer containing the self-repairing waterborne polyurethane are integrally formed, so that the self-repairing waterborne polyurethane layer is strongly attached to the rigid polyurethane material of the automobile interior decorative plate, and the hardness and the wear resistance of the automobile interior decorative plate are further improved; meanwhile, the spraying-free process is adopted, so that the VOC and air quality in the automobile is effectively improved, and the application value is high.
Preferably, the material of the plastic substrate is selected from any one or a combination of at least two of PC, ABS, PVC, PE, PP, PET, POM or PBT, wherein a typical but non-limiting combination is: PC/ABS, PP/PE, ABS/PVC or PC/PE/PP.
Preferably, the self-repairing aqueous polyurethane layer is selected from a layer consisting of aqueous polyurethane or an aqueous polyurethane composite, wherein the aqueous polyurethane composite means that the self-repairing aqueous polyurethane layer contains other auxiliary components and the like besides the aqueous polyurethane component.
Preferably, the self-repairing waterborne polyurethane layer contains the following raw materials in parts by weight:
50-90 parts of polyol; 0.1-3 parts of an internal crosslinking agent; 30-60 parts of isocyanate; 0.01-0.3 part of tin catalyst; 3-6 parts of an alcohol chain extender; 1-5 parts of a chain extender containing a disulfide bond; 2-3 parts of triethylamine; 3-9 parts of a water-based hand feeling agent; 1-5 parts of an aqueous defoaming agent; 2-5 parts of a water-based leveling agent; 3-10 parts of water-based color paste; 2-5 parts of an aqueous thickener.
Preferably, the polyhydric alcohol is any one or a combination of at least two of hydrolysis-resistant polytetrahydrofuran diol, polypropylene glycol, polycarbonate diol or hydroxyl-terminated polytetramethylene glycol, wherein a typical but non-limiting combination is as follows: polypropylene glycol and polycarbonate diol; polypropylene glycol, polycarbonate diol and hydroxyl-terminated polytetramethylene glycol.
Preferably, the internal crosslinking agent is any one of trimethylolpropane, triethanolamine or diethylenetriamine, or a combination of at least two of them, wherein a typical but non-limiting combination is: trimethylolpropane and triethanolamine; triethanolamine and diethylenetriamine; trimethylolpropane and diethylenetriamine.
Preferably, the isocyanate is any one of isophorone diisocyanate, hexamethylene diisocyanate, 4' -dicyclohexylmethane diisocyanate or diphenylmethane diisocyanate or a combination of at least two thereof, wherein a typical but non-limiting combination is: isophorone diisocyanate and diphenylmethane diisocyanate; isophorone diisocyanate and 4,4' -dicyclohexylmethane diisocyanate; isophorone diisocyanate, diphenylmethane diisocyanate, and 4,4' -dicyclohexylmethane diisocyanate.
Preferably, the tin-based catalyst is any one of stannous octoate, dibutyltin dilaurate or dioctyltin dilaurate or a combination of at least two of them, wherein a typical but non-limiting combination is: stannous octoate and dibutyltin dilaurate; dibutyltin dilaurate and dioctyltin dilaurate; stannous octoate, dibutyltin dilaurate, and dioctyltin dilaurate.
Preferably, the alcohol chain extender is 1, 3-butanediol and/or 1, 4-butanediol.
Preferably, the chain extender containing disulfide bonds is 2,2 '-dithiodiethanol and/or 4,4' -diaminodiphenyl disulfide.
The aqueous hand feeling agent, the aqueous defoaming agent, the aqueous leveling agent, the aqueous color paste and the like are all auxiliary components commonly used in the field for preparing the aqueous polyurethane paste, and are not particularly limited.
In the raw materials contained in the self-repairing waterborne polyurethane layer, the polyol is 50-90 parts, for example, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts or 90 parts, preferably 55-88 parts; the internal crosslinking agent is 0.1 to 3 parts, and may be, for example, 0.1 part, 0.15 part, 0.2 part, 0.25 part, 0.3 part, 0.4 part, 0.5 part, 0.8 part, 1 part, 1.5 parts, 1.7 parts, 2 parts, 2.5 parts, 2.8 parts or 3 parts, preferably 0.5 to 2.8 parts; the isocyanate is 30 to 60 parts, and may be, for example, 30 parts, 32 parts, 35 parts, 40 parts, 43 parts, 45 parts, 47 parts, 50 parts, 52 parts, 55 parts, 58 parts or 60 parts, preferably 35 to 60 parts; the tin catalyst is 0.01 to 0.3 part, for example, 0.01 part, 0.02 part, 0.05 part, 0.08 part, 0.1 part, 0.12 part, 0.15 part, 0.18 part, 0.2 part, 0.22 part, 0.25 part, 0.28 part or 0.3 part, preferably 0.01 to 0.28 part; the alcohol chain extender is 3-6 parts, for example, 3 parts, 4 parts, 5 parts or 6 parts, preferably 3-5 parts; the chain extender containing disulfide bonds is 1-5 parts, such as 1 part, 2 parts, 3 parts, 4 parts or 5 parts, preferably 2-5 parts; the aqueous hand feeling agent is 3 to 9 parts, for example, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts or 9 parts, preferably 4 to 9 parts; the aqueous defoaming agent is 1-5 parts, for example, 1 part, 2 parts, 3 parts, 4 parts or 5 parts, preferably 2-5 parts; the aqueous leveling agent is 2 to 5 parts, for example, 2 parts, 3 parts, 4 parts or 5 parts, preferably 2 to 4 parts; the aqueous color paste is 3-10 parts, for example, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts or 9 parts, preferably 4-9 parts; the aqueous thickener is 2 to 5 parts, for example, 2 parts, 3 parts, 4 parts or 5 parts, preferably 2 to 4 parts.
In a second aspect, the present invention also provides a method for manufacturing an automotive interior trim panel having a self-repairing function as described in the first aspect, including the steps of:
(1) mixing polyol, an internal crosslinking agent, isocyanate, a tin catalyst, an alcohol chain extender, a chain extender containing a disulfide bond and triethylamine to prepare a self-repairing aqueous polyurethane emulsion;
(2) mixing the aqueous polyurethane emulsion prepared in the step (1) with various auxiliaries to obtain surface layer slurry;
(3) and (3) adopting a double-material injection molding process, and integrally molding to enable the surface layer slurry to uniformly cover the plastic base layer to obtain the automobile interior decoration plate with the self-repairing function.
According to the invention, a double-material injection molding process is adopted, the plastic base layer and the surface layer are integrally molded to prepare the automobile interior decorative plate with the self-repairing function, so that the waterborne polyurethane surface layer and the plastic base layer can be tightly combined, and the hardness and the scraping resistance of the automobile interior decorative plate are further improved; the double-material injection molding process belongs to a spraying-free process, can effectively improve the quality of VOC and air in a vehicle, can realize different glossiness by adjusting the preparation process of the surface layer slurry, and has excellent weather resistance.
Preferably, the preparation of the self-repairing aqueous polyurethane emulsion in the step (1) is carried out by a prepolymer method. Preferably, the preparation of the self-repairing aqueous polyurethane emulsion comprises the following steps:
(a) taking polyhydric alcohol and an internal crosslinking agent, heating, vacuum dehydrating, and cooling after dehydrating;
(b) adding isocyanate and a tin catalyst into the mixture obtained in the step (a), heating, stirring and reacting, then adding an alcohol chain extender and reacting to obtain a prepolymer A;
(c) and cooling the prepolymer A, adding a chain extender containing a disulfide bond to react, cooling the prepolymer, adding triethylamine, adding deionized water after a neutralization reaction, stirring, emulsifying and dispersing to obtain the self-repairing aqueous polyurethane emulsion.
Preferably, the preparation of the facing layer slurry in the step (2) comprises the following steps: and (2) taking the self-repairing aqueous polyurethane emulsion obtained in the step (1), adding an aqueous hand feeling agent, an aqueous defoaming agent, an aqueous flatting agent and an aqueous color paste, uniformly mixing, and then adding an aqueous thickening agent to adjust viscosity, thereby obtaining the surface layer slurry.
Preferably, the two-material injection molding process of step (3) comprises the following steps: and simultaneously feeding the surface layer slurry and the plastic base material from two feed inlets of a double-material injection molding machine, and integrally molding in a mold to uniformly cover the surface layer above the plastic base layer to obtain the self-repairing automobile interior decoration plate.
Preferably, the preparation method of the automobile interior trim panel with the self-repairing function, provided by the invention, specifically comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 50-90 parts of polyol and 0.1-3 parts of internal crosslinking agent, dehydrating under vacuum at the temperature of 110-120 ℃ for 3-5 hours, cooling to 45-70 ℃ after dehydration, adding 30-60 parts of isocyanate and 0.01-0.3 part of tin catalyst, heating to 80-90 ℃, stirring and reacting for 1-3 hours, then adding 3-6 parts of alcohol chain extender and reacting for 3-4 hours to obtain prepolymer A; cooling the prepolymer A to 45-60 ℃, adding 1-5 parts of chain extender containing disulfide bonds to react for 1-2 hours, cooling the prepolymer to below 45 ℃, adding 2-3 parts of triethylamine, neutralizing for 5-10 minutes, adding deionized water, stirring, emulsifying and dispersing, wherein the rotating speed of a disperser is 1500-2500r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: taking 100 parts of polyurethane emulsion, adding 3-9 parts of aqueous hand feeling agent, 1-5 parts of aqueous defoaming agent, 2-5 parts of aqueous flatting agent and 3-10 parts of aqueous color paste, uniformly mixing, and then adding 2-5 parts of aqueous thickening agent to adjust the viscosity to 1000-2000 Pa.s to obtain surface layer paste;
(3) preparing the automobile interior decorative plate with the self-repairing function: simultaneously feeding the surface layer slurry and the base material from two feed inlets of a double-material injection molding machine, and integrally molding in a mold; the molding pressure is 10-120MPa, and the molding temperature is 100-.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the self-repairing automobile interior decorative plate, the waterborne polyurethane with the self-repairing function is used as the surface layer and is integrally formed with the plastic base layer, so that the automobile interior decorative plate has good scratch resistance and a normal-temperature self-repairing function, particularly, multiple times of repairing can be realized at the same position, the problem of scratch damage of the surface layer of the automobile interior decorative plate can be effectively solved, the attractiveness of the automobile interior decorative plate is maintained, and the service life of the automobile interior decorative plate is effectively prolonged;
(2) according to the invention, the self-repairing water-based polyurethane layer and the plastic base layer are integrally formed, so that the problem of adhesion between the self-repairing layer and the rigid polyurethane material of the automobile interior decorative plate is solved, and the hardness and the wear resistance of the automobile interior decorative plate are improved;
(3) the automobile interior decorative plate with the self-repairing function is integrally formed by adopting a double-material injection molding process, belongs to a spraying-free process, and can effectively improve the VOC and air quality in an automobile; in addition, the self-repairing waterborne polyurethane layer provided by the invention can realize different glossiness (high gloss/matte) through process adjustment, and meanwhile, the self-repairing waterborne polyurethane layer has excellent weather resistance and wide application prospect.
Drawings
Fig. 1 is a schematic structural view of an automotive interior trim panel having a self-repairing function according to the present invention.
Wherein, 1 is a self-repairing aqueous polyurethane layer, and 2 is a plastic base layer.
Detailed Description
The following further describes the technical means of the present invention to achieve the predetermined technical effects by means of embodiments with reference to the accompanying drawings, and the following detailed descriptions of the embodiments and structures of the present invention are provided.
As shown in figure 1, the invention provides an automobile interior decoration plate with a self-repairing function, which comprises a self-repairing water-based polyurethane layer 1 and a plastic base layer 2, wherein the self-repairing water-based polyurethane layer 1 and the plastic base layer 2 are integrally formed by adopting a double-material injection molding process.
Example 1
The embodiment provides a preparation method of an automobile interior decoration plate with a self-repairing function, which comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 70 parts of 1, 6-hexanediol polycarbonate and 1 part of internal crosslinking agent trimethylolpropane, carrying out vacuum dehydration for 3 hours at 120 ℃, cooling to 55 ℃, adding 25 parts of hexamethylene diisocyanate and 0.3 part of stannous octoate, uniformly mixing, heating to 90 ℃, stirring for reaction for 2 hours, adding 5 parts of alcohol chain extender 1, 3-butanediol into a reactor, and reacting for 3 hours to obtain a prepolymer A; cooling the prepolymer A to 55 ℃, adding 2 parts of chain extender 2,2' -dithiodiethanol containing disulfide bonds, reacting for 2 hours, cooling to 40 ℃, adding 2 parts of triethylamine, neutralizing, reacting for 10 minutes, adding deionized water, strongly stirring, emulsifying and dispersing, wherein the rotating speed of a disperser is 2000r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: adding 100 parts of aqueous polyurethane emulsion, 4 parts of aqueous hand feeling agent, 2 parts of aqueous defoaming agent, 4 parts of aqueous flatting agent and 4 parts of aqueous color paste, uniformly mixing, and adding 4 parts of aqueous thickening agent to adjust the viscosity to 1500 Pa.s to obtain surface layer paste;
(3) preparing a self-repairing automobile interior decoration plate: preparing a base material by using PC granules, respectively adding the surface layer slurry and the base material into two material openings of a double-material injection molding machine, and carrying out in-mold forming at 125 ℃ and 100MPa to ensure that the surface layer uniformly covers the base layer, thereby obtaining the automobile interior decoration plate with the self-repairing function.
The automobile interior decoration plate with the self-repairing function prepared by the embodiment is composed of a PC plastic base layer and a surface layer which are integrally formed, wherein the surface layer is a self-repairing water-based polyurethane layer covering the base layer.
Example 2
The embodiment provides a preparation method of an automobile interior decoration plate with a self-repairing function, which comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 70 parts of polypropylene glycol and 1 part of internal crosslinking agent trimethylolpropane, carrying out vacuum dehydration for 3 hours at 120 ℃, adding 30 parts of 4,4' -dicyclohexylmethane diisocyanate and 0.2 part of dibutyltin dilaurate after cooling to 55 ℃, uniformly mixing, heating to 90 ℃, stirring and reacting for 2 hours, adding 5 parts of alcohol chain extender 1, 4-butanediol into a reactor, and reacting for 3 hours to obtain a prepolymer A; cooling the prepolymer A to 55 ℃, adding 2 parts of chain extender 4,4' -diaminodiphenyl disulfide containing disulfide bonds, reacting for 2 hours, cooling to 40 ℃, adding 2 parts of triethylamine, neutralizing, reacting for 10 minutes, adding deionized water, strongly stirring, emulsifying and dispersing, wherein the rotating speed of a disperser is 2000r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: adding 100 parts of aqueous polyurethane emulsion, 5 parts of aqueous hand feeling agent, 2 parts of aqueous defoaming agent, 3 parts of aqueous flatting agent and 5 parts of aqueous color paste, uniformly mixing, and adding 5 parts of aqueous thickening agent to adjust the viscosity to 1500 Pa.s to obtain surface layer paste;
(3) preparing the automobile interior decorative plate with the self-repairing function: preparing a base material by using PC granules, respectively adding the surface layer slurry and the base material into two material openings of a double-material injection molding machine, and carrying out in-mold forming at 125 ℃ and 100MPa to ensure that the surface layer uniformly covers the base layer, thereby obtaining the automobile interior decoration plate with the self-repairing function.
The automobile interior decoration plate with the self-repairing function prepared by the embodiment is composed of a PC plastic base layer and a surface layer which are integrally formed, wherein the surface layer is a self-repairing water-based polyurethane layer covering the base layer.
Example 3
The embodiment provides a preparation method of an automobile interior decoration plate with a self-repairing function, which comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 55 parts of polypropylene glycol and 0.2 part of triethanolamine as an internal crosslinking agent, dehydrating for 4 hours in vacuum at the temperature of 115 ℃, adding 30 parts of hexamethylene diisocyanate and 0.01 part of dioctyltin dilaurate after cooling to 55 ℃, uniformly mixing, heating to 90 ℃, stirring for reaction for 2 hours, adding 5 parts of alcohol chain extender 1, 3-butanediol into a reactor, and reacting for 2.5 hours to obtain a prepolymer A; cooling the prepolymer A to 55 ℃, adding 1 part of chain extender 2,2' -dithiodiethanol containing disulfide bonds, reacting for 1.5 hours, then cooling to 35 ℃, adding 3 parts of triethylamine, neutralizing, reacting for 10 minutes, adding deionized water, strongly stirring, emulsifying and dispersing, wherein the rotating speed of a disperser is 2000r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: adding 4 parts of aqueous hand feeling agent, 3 parts of aqueous defoaming agent, 3 parts of aqueous flatting agent and 5 parts of aqueous color paste into 100 parts of aqueous polyurethane emulsion, uniformly mixing, and adding 3 parts of aqueous thickening agent to adjust the viscosity to 1200 Pa.s to obtain surface layer paste;
(3) preparing the automobile interior decorative plate with the self-repairing function: preparing a base material by using PC/ABS mixed granules with the weight ratio of 1:1, respectively adding the surface layer slurry and the base material into two material openings of a double-material injection molding machine, and carrying out in-mold molding at 100 ℃ and 50MPa to ensure that the surface layer uniformly covers the base layer, thereby obtaining the automobile interior decoration plate with the self-repairing function.
The automobile interior decoration plate with the self-repairing function prepared by the embodiment is composed of a PC/ABS composite plastic base layer and a surface layer which are integrally formed, wherein the surface layer is a self-repairing aqueous polyurethane layer covering the base layer.
Example 4
The embodiment provides a preparation method of an automobile interior decoration plate with a self-repairing function, which comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 55 parts of polytetrahydrofuran diol and 0.5 part of internal crosslinking agent diethylenetriamine, dehydrating for 3 hours in vacuum at 120 ℃, adding 35 parts of diphenylmethane diisocyanate and 0.01 part of dibutyltin dilaurate after cooling to 55 ℃, uniformly mixing, heating to 90 ℃, stirring for reaction for 2 hours, adding 3 parts of alcohol chain extender 1, 4-butanediol into a reactor, and reacting for 3 hours to obtain a prepolymer A; cooling the prepolymer A to 55 ℃, adding 2 parts of chain extender 4,4' -diamino diphenyl disulfide containing disulfide bonds, reacting for 2 hours, cooling to 38 ℃, adding 2 parts of triethylamine, neutralizing, reacting for 8 minutes, adding deionized water, strongly stirring, emulsifying and dispersing, wherein the rotating speed of a disperser is 1800r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: preparing an automobile interior decoration plate: adding 100 parts of aqueous polyurethane emulsion, 4 parts of aqueous hand feeling agent, 2 parts of aqueous defoaming agent, 2 parts of aqueous flatting agent and 4 parts of aqueous color paste, uniformly mixing, and adding 2 parts of aqueous thickening agent to adjust the viscosity to 1800 Pa.s to obtain surface layer paste;
(3) preparing the automobile interior decorative plate with the self-repairing function: preparing a base material by using PVC granules, respectively adding the surface layer slurry and the base material into two material openings of a double-material injection molding machine, and molding in a mold at 120 ℃ and 120MPa to ensure that the surface layer uniformly covers the base layer, thereby obtaining the automobile interior decoration plate with the self-repairing function.
The automobile interior decoration plate with the self-repairing function prepared by the embodiment is composed of a PVC plastic base layer and a surface layer which are integrally formed, wherein the surface layer is a self-repairing water-based polyurethane layer covering the base layer.
Example 5
The embodiment provides a preparation method of an automobile interior decoration plate with a self-repairing function, which comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 88 parts of hydroxyl-terminated polytetramethylene glycol and 2.8 parts of internal crosslinking agent trimethylolpropane, dehydrating for 3 hours in vacuum at 120 ℃, adding 60 parts of isophorone diisocyanate and 0.3 part of stannous octoate after cooling to 55 ℃, uniformly mixing, heating to 90 ℃, stirring and reacting for 2 hours, adding 5 parts of alcohol chain extender 1, 3-butanediol into a reactor, and reacting for 3 hours to obtain a prepolymer A; cooling the prepolymer A to 55 ℃, adding 5 parts of chain extender 2,2' -dithiodiethanol containing disulfide bonds, reacting for 2 hours, cooling to 40 ℃, adding 2 parts of triethylamine, neutralizing, reacting for 10 minutes, adding deionized water, strongly stirring, emulsifying and dispersing, wherein the rotating speed of a disperser is 2000r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: adding 9 parts of aqueous hand feeling agent, 5 parts of aqueous defoaming agent, 4 parts of aqueous flatting agent and 9 parts of aqueous color paste into 100 parts of aqueous polyurethane emulsion, uniformly mixing, and adding 4 parts of aqueous thickening agent to adjust the viscosity to 2000 Pa.s to obtain surface layer paste;
(3) preparing the automobile interior decorative plate with the self-repairing function: preparing a base material by using PP/PE composite granules with the weight ratio of 2:1, respectively adding the surface layer slurry and the base material into two material openings of a double-material injection molding machine, and carrying out in-mold molding at 150 ℃ and 40MPa to ensure that the surface layer uniformly covers the base layer, thereby obtaining the automobile interior decoration plate with the self-repairing function.
The automobile interior decoration plate with the self-repairing function prepared by the embodiment is composed of a PP/PE composite plastic base layer and a surface layer which are integrally formed, wherein the surface layer is a self-repairing aqueous polyurethane layer covering the base layer.
Example 6
The embodiment provides a preparation method of an automobile interior decoration plate with a self-repairing function, which comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 90 parts of polytetrahydrofuran diol and 2 parts of internal cross-linking agent triethanolamine, carrying out vacuum dehydration for 4 hours at 120 ℃, adding 55 parts of 4,4' -dicyclohexylmethane diisocyanate and 0.3 part of dioctyltin dilaurate after cooling to 65 ℃, uniformly mixing, heating to 88 ℃, stirring for reaction for 2 hours, adding 5 parts of alcohol chain extender 1, 4-butanediol into a reactor, and reacting for 3 hours to obtain a prepolymer A; cooling the prepolymer A to 55 ℃, adding 5 parts of chain extender 4,4' -diaminodiphenyl disulfide containing disulfide bonds, reacting for 2 hours, cooling to 45 ℃, adding 3 parts of triethylamine, neutralizing, reacting for 10 minutes, adding deionized water, stirring strongly, emulsifying and dispersing, wherein the rotating speed of a disperser is 2500r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: adding 8 parts of aqueous hand feeling agent, 4 parts of aqueous defoaming agent, 5 parts of aqueous flatting agent and 9 parts of aqueous color paste into 100 parts of aqueous polyurethane emulsion, uniformly mixing, and adding 5 parts of aqueous thickening agent to adjust the viscosity to 2000 Pa.s to obtain surface layer paste;
(3) preparing the automobile interior decorative plate with the self-repairing function: preparing a base material by using PC/PE/PP composite granules with the weight ratio of 1:1:1, respectively adding the surface layer slurry and the base material into two material openings of a double-material injection molding machine, and carrying out in-mold forming at 145 ℃ and 100MPa to ensure that the surface layer uniformly covers the base layer, thereby obtaining the automobile interior decoration plate with the self-repairing function.
The automobile interior decoration plate with the self-repairing function prepared by the embodiment is composed of a PC/PE/PP composite plastic base layer and a surface layer which are integrally formed, wherein the surface layer is a self-repairing aqueous polyurethane layer covering the base layer.
Comparative example 1
The only difference compared to example 1 is that step (3) in example 1 is replaced by the following operation:
preparing a self-repairing automobile interior decoration plate: preparing a base material by using PC granules, pressing the base material into a plastic base layer, and spraying the prepared waterborne polyurethane surface layer slurry on the surface of the plastic base layer by adopting spraying equipment so as to obtain the automobile interior decoration plate.
Evaluation of self-repair function: the automobile interior trim panels with self-repairing function obtained in the above examples 1 to 6 and the automobile interior trim panel prepared in the comparative example 1 were subjected to a self-repairing function test mainly by an appearance test and a scratch test, and the specific test method was as follows:
and (3) apparent testing: the male fingernail (less than or equal to 1mm) and the female fingernail (less than or equal to 2mm) are respectively used for horizontal scraping, and no additional force is applied to the fingers.
Testing by an instrument: a German Erichsen scratch tester is used, the diameter of a needle point is 0.5-0.75 mm, and the pressure is 10-20 newtons.
Evaluation criteria: disappearing immediately within 3min at room temperature
Within 30min at room temperature
Delta disappearance within 30min after 60 ℃ hot air
Does not disappear
The test results are shown in table 1:
TABLE 1
Figure BDA0002473982360000141
As can be seen from table 1, when the appearance test is performed, the automobile interior trim panel prepared by integrally forming the plastic base layer and the waterborne polyurethane layer as the surface layer in examples 1 to 6 has nail scratches that disappear immediately within 3min at room temperature, while the automobile interior trim panel prepared by directly spraying the waterborne polyurethane slurry on the surface of the plastic base layer in comparative example 1 has no nail scratches that disappear, which indicates that the automobile interior trim panels provided in examples 1 to 6 have self-repairing capability when being scratched by nails is better than that of comparative example 1.
When an instrument test is performed, the surface scratches of the automobile interior trim panels prepared in examples 1 to 6 disappear within 30min after being exposed to room temperature or 60 ℃ hot air, while the surface scratches of the automobile interior trim panels prepared in comparative example 1 do not disappear, which indicates that the automobile interior trim panels provided in examples 1 to 6 have a good self-repairing function.
In conclusion, the waterborne polyurethane emulsion is synthesized by a prepolymer method, the surface layer slurry is prepared by adding the auxiliary agents, and the automobile interior trim panel is prepared by a double-material injection molding process. In addition, the preparation method provided by the invention adopts a spraying-free process, effectively improves the quality of VOC and air in the automobile, and has wide application prospect.
The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims (8)

1. An automobile interior decoration plate with a self-repairing function is characterized by comprising a plastic base layer and a surface layer which are integrally formed; the surface layer is a self-repairing aqueous polyurethane layer covering the base layer.
2. The automotive interior trim panel of claim 1, wherein the plastic base layer is made of a material selected from any one or a combination of at least two of PC, ABS, PVC, PE, PP, PET, POM, and PBT.
3. The automobile interior decoration panel according to claim 1, wherein the self-repairing aqueous polyurethane layer comprises the following raw materials in parts by weight:
50-90 parts of polyol; 0.1-3 parts of an internal crosslinking agent; 30-60 parts of isocyanate; 0.01-0.3 part of tin catalyst; 3-6 parts of an alcohol chain extender; 1-5 parts of a chain extender containing a disulfide bond; 2-3 parts of triethylamine; 3-9 parts of a water-based hand feeling agent; 1-5 parts of an aqueous defoaming agent; 2-5 parts of a water-based leveling agent; 3-10 parts of water-based color paste; 2-5 parts of an aqueous thickener;
preferably, the polyalcohol is any one or the combination of at least two of hydrolysis-resistant polytetrahydrofuran diol, polypropylene glycol, polycarbonate diol or hydroxyl-terminated polytetramethylene glycol;
preferably, the internal crosslinking agent is any one or a combination of at least two of trimethylolpropane, triethanolamine or diethylenetriamine;
preferably, the isocyanate is any one of isophorone diisocyanate, hexamethylene diisocyanate, 4' -dicyclohexylmethane diisocyanate or diphenylmethane diisocyanate or a combination of at least two of the isophorone diisocyanate, the hexamethylene diisocyanate, the diphenylmethane diisocyanate or the diphenylmethane diisocyanate;
preferably, the tin catalyst is any one of stannous octoate, dibutyltin dilaurate or dioctyltin dilaurate or a combination of at least two of the foregoing;
preferably, the alcohol chain extender is 1, 3-butanediol and/or 1, 4-butanediol;
preferably, the chain extender containing disulfide bonds is 2,2 '-dithiodiethanol and/or 4,4' -diaminodiphenyl disulfide.
4. The method for manufacturing an automobile interior trim panel having a self-repairing function according to any one of claims 1 to 3, characterized by comprising the steps of:
(1) mixing polyol, an internal crosslinking agent, isocyanate, a tin catalyst, an alcohol chain extender, a chain extender containing a disulfide bond and triethylamine to prepare a self-repairing aqueous polyurethane emulsion;
(2) mixing the aqueous polyurethane emulsion prepared in the step (1) with various auxiliaries to obtain surface layer slurry;
(3) and (3) adopting a double-material injection molding process, and integrally molding to enable the surface layer slurry to uniformly cover the plastic base layer to obtain the automobile interior decoration plate with the self-repairing function.
5. The preparation method according to claim 4, wherein the self-repairing aqueous polyurethane emulsion in the step (1) is prepared by a prepolymer method;
preferably, the preparation of the self-repairing aqueous polyurethane emulsion comprises the following steps:
(a) taking polyhydric alcohol and an internal crosslinking agent, heating, vacuum dehydrating, and cooling after dehydrating;
(b) adding isocyanate and a tin catalyst into the mixture obtained in the step (a), heating, stirring and reacting, then adding an alcohol chain extender and reacting to obtain a prepolymer A;
(c) and cooling the prepolymer A, adding a chain extender containing a disulfide bond to react, cooling the prepolymer, adding triethylamine, adding deionized water after a neutralization reaction, stirring, emulsifying and dispersing to obtain the self-repairing aqueous polyurethane emulsion.
6. The method according to claim 4 or 5, wherein the preparing of the facing layer slurry of step (2) comprises:
and (2) taking the self-repairing aqueous polyurethane emulsion obtained in the step (1), adding an aqueous hand feeling agent, an aqueous defoaming agent, an aqueous flatting agent and an aqueous color paste, uniformly mixing, and then adding an aqueous thickening agent to adjust viscosity, thereby obtaining the surface layer slurry.
7. The method for preparing according to one of claims 4 to 6, wherein the two-shot injection molding process of step (3) comprises the steps of:
and simultaneously feeding the surface layer slurry and the plastic base material from two feed inlets of a double-material injection molding machine, and integrally molding in a mold to uniformly cover the surface layer above the plastic base layer to obtain the self-repairing automobile interior decoration plate.
8. Preparation process according to one of claims 4 to 7, characterized in that it comprises the following steps:
(1) preparing a self-repairing aqueous polyurethane emulsion: taking 50-90 parts of polyol and 0.1-3 parts of internal crosslinking agent, dehydrating under vacuum at the temperature of 110-120 ℃ for 3-5 hours, cooling to 45-70 ℃ after dehydration, adding 30-60 parts of isocyanate and 0.01-0.3 part of tin catalyst, heating to 80-90 ℃, stirring and reacting for 1-3 hours, then adding 3-6 parts of alcohol chain extender and reacting for 3-4 hours to obtain prepolymer A; cooling the prepolymer A to 45-60 ℃, adding 1-5 parts of chain extender containing disulfide bonds to react for 1-2 hours, cooling the prepolymer to below 45 ℃, adding 2-3 parts of triethylamine, neutralizing for 5-10 minutes, adding deionized water, stirring, emulsifying and dispersing, wherein the rotating speed of a disperser is 1500-2500r/min, and obtaining the self-repairing waterborne polyurethane emulsion;
(2) preparing surface layer slurry: taking 100 parts of polyurethane emulsion, adding 3-9 parts of aqueous hand feeling agent, 1-5 parts of aqueous defoaming agent, 2-5 parts of aqueous flatting agent and 3-10 parts of aqueous color paste, uniformly mixing, and then adding 2-5 parts of aqueous thickening agent to adjust the viscosity to 1000-2000 Pa.s to obtain surface layer paste;
(3) preparing the automobile interior decorative plate with the self-repairing function: simultaneously feeding the surface layer slurry and the base material from two feed inlets of a double-material injection molding machine, and integrally molding in a mold; the molding pressure is 10-120MPa, and the molding temperature is 100-.
CN202010357453.5A 2020-04-29 2020-04-29 Automobile interior decoration plate with self-repairing function and preparation method thereof Pending CN111645393A (en)

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Publication number Priority date Publication date Assignee Title
CN112521845A (en) * 2020-12-01 2021-03-19 安徽科创美涂料科技股份有限公司 Cationic polyurethane-based self-repairing real stone paint and preparation method thereof
CN114851671A (en) * 2022-03-21 2022-08-05 上海品诚控股集团有限公司 Paint-spraying-free intelligent healing automobile exterior trimming part and preparation method thereof
CN114872388A (en) * 2022-04-30 2022-08-09 维尔特新材料科技(无锡)有限公司 Low-VOCs-release glass magnesium board composite floor and preparation method thereof
CN115124679A (en) * 2022-07-11 2022-09-30 陕西科技大学 Self-repairing hyperbranched waterborne polyurethane and preparation method and application thereof

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CN105612085A (en) * 2013-10-04 2016-05-25 韦巴斯托股份公司 Method for manufacturing an exterior vehicle component and exterior vehicle component
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Publication number Priority date Publication date Assignee Title
CN112521845A (en) * 2020-12-01 2021-03-19 安徽科创美涂料科技股份有限公司 Cationic polyurethane-based self-repairing real stone paint and preparation method thereof
CN114851671A (en) * 2022-03-21 2022-08-05 上海品诚控股集团有限公司 Paint-spraying-free intelligent healing automobile exterior trimming part and preparation method thereof
CN114872388A (en) * 2022-04-30 2022-08-09 维尔特新材料科技(无锡)有限公司 Low-VOCs-release glass magnesium board composite floor and preparation method thereof
CN114872388B (en) * 2022-04-30 2023-09-22 维尔特新材料科技(无锡)有限公司 Low-VOCs-release glass magnesium board composite floor and preparation method thereof
CN115124679A (en) * 2022-07-11 2022-09-30 陕西科技大学 Self-repairing hyperbranched waterborne polyurethane and preparation method and application thereof
CN115124679B (en) * 2022-07-11 2023-09-12 陕西科技大学 Self-repairing hyperbranched waterborne polyurethane and preparation method and application thereof

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Application publication date: 20200911