WO2017012239A1 - 一种低voc聚氨酯合成革及其制备方法 - Google Patents

一种低voc聚氨酯合成革及其制备方法 Download PDF

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WO2017012239A1
WO2017012239A1 PCT/CN2015/096541 CN2015096541W WO2017012239A1 WO 2017012239 A1 WO2017012239 A1 WO 2017012239A1 CN 2015096541 W CN2015096541 W CN 2015096541W WO 2017012239 A1 WO2017012239 A1 WO 2017012239A1
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component
resin
synthetic leather
low voc
solvent
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PCT/CN2015/096541
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English (en)
French (fr)
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毛国兵
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江苏国信复合材料科技股份有限公司
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Publication of WO2017012239A1 publication Critical patent/WO2017012239A1/zh

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    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4202—Two or more polyesters of different physical or chemical nature
    • 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
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • 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
    • C09D7/65—Additives macromolecular
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
    • 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
    • C08G2101/00—Manufacture of cellular products
    • 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
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather

Definitions

  • the invention belongs to the field of synthetic leather, and particularly relates to a low VOC polyurethane ecological synthetic leather and a preparation method thereof.
  • the target product of this project is mainly produced by replacing solvent-free polyurethane resin with traditional solvent-based polyurethane resin.
  • solvent-free polyurethane resin with traditional solvent-based polyurethane resin.
  • domestically staying in solvent-based resin for production, its DMF solvent residue, environmental pollution problems in production and use of the place can not be completely and effectively solved.
  • Solvent-free ecological synthetic leather processing uses solvent-free polyurethane resin instead of solvent-based resin as raw material, and the finished leather product is produced through a new tannery production line.
  • Solvent-free resin does not contain toxic organic chemical solvents, which is harmless to the environment and meets the high requirements of ecological environment protection.
  • Solvent-free polyurethane on synthetic leather is the latest high-tech material.
  • the solvent-free polyurethane leather making technology is mainly developed and controlled by world-class companies such as Basf, Bayer, and Germany. The research on solvent-free polyurethane for synthetic leather in China started relatively late. Domestic technology applications are still in the stage of exploration of simple varieties.
  • the object of the present invention is to provide a low VOC ecological synthetic leather by using a solventless polyurethane resin instead of a conventional solvent type resin.
  • Another object of the present invention is to provide an improved process for the preparation of the above solvent-free ecological synthesis.
  • the object of the invention can be achieved by the following measures:
  • a low VOC polyurethane synthetic leather comprising a top layer and a foam layer, both of which are made of a two-component polyurethane resin, which is made of a component A and a component B.
  • component A is a solvent-free hydroxy mixture resin portion
  • component B is an isocyanate moiety
  • a and B components are used in an amount of OH:NCO of 2:1 to 1.5, respectively, in terms of OH and NCO
  • the mass composition of the component A is: 100 parts of solvent-free hydroxy mixture resin, 0.1-0.4 part of antifoaming agent, 0.1-0.4 part of thickener, 0.2-0.5 part of leveling agent, 0.05-0.2 part of silicone dry slip agent , driers 0.05-0.1 parts, cross-linking agent 0.2-0.4 parts.
  • the solventless hydroxy mixture resin is a solventless polyester polyol mixed resin or a solventless polyether polyol mixed resin, preferably a solventless polyester polyol mixed resin, which is produced by domestic manufacturers such as Huafeng and Asahikawa.
  • the isocyanate is toluene diisocyanate.
  • the OH:NCO ratio of the solvent-free hydroxy mixture resin portion and the isocyanate portion in terms of OH and NCO, respectively, is preferably from 2:1.1 to 1.3 (molar ratio).
  • the antifoaming agent in the present application is selected from the group consisting of polyether modified polyorganosiloxane antifoaming agent;
  • the thickening agent is selected from CA-908 waterborne polyurethane thickener, K-800 waterborne polyurethane thickener or CA-902 Waterborne polyurethane thickener.
  • the leveling agent is selected from the group consisting of Changhui BNK-LK600 leveling agent, D-3000 waterborne polyurethane leveling agent or RA1103 waterborne polyurethane leveling agent;
  • the silicone dry slip agent is selected from MOLYKOTE 557 silicone dry slip agent or Dow Corning 557 organic Silicon dry slip agent.
  • the drier is dibutyltin dilaurate;
  • the crosslinker is selected from the group consisting of DT-100 crosslinker, EVA intermediate temperature crosslinker, XR-100 crosslinker, DT-100W high temperature crosslinker.
  • the color paste may further be a solventless color paste, and the domestic dark blue may be sold and produced.
  • the choice of catalyst is determined by the nature of the polyol portion of the solventless resin A component, specifically a tertiary amine catalyst or an organometallic catalyst.
  • the surface layer and the foam layer in the low VOC polyurethane synthetic leather are prepared by pouring and drying the two-component in-line curing process.
  • the specific preparation method of the polyurethane synthetic leather comprises the following steps:
  • A. Casting fabric The components A and B are respectively mixed according to the ratio of the tank pressure to the solvent-free dry equipment line and poured onto the release paper, and uniformly coated by a spray gun casting machine; 80 ° C Drying at -100 ° C, drying time is 2 to 10 min, to obtain a surface layer resin;
  • Casting foam layer resin Mixing component A and component B according to the ratio of the tank to the solvent-free dry process line according to the ratio, and pouring onto the dried surface layer resin, and performing 100 ° C Semi-drying at ⁇ 120°C for 1 to 3 minutes;
  • step B the semi-baked foam layer resin of step B is applied to the base fabric, and then oven-cured at 100 ° C to 120 ° C for 5 to 15 minutes;
  • step D Separate winding: After the above step C to the product is matured, the release paper is peeled off, and the desired low VOC polyurethane synthetic leather without any solvent is obtained.
  • the release paper in this method adopts plain paper, and adopts the vacuum absorbing operation of 40 ° C ⁇ 60 ° C in the grain processing of step D, which can break the limitation of the traditional release paper pattern, so that the product can meet various needs.
  • the invention eliminates pollution from the source, and the raw materials used do not contain any organic solvent, and have no harm to the producers and users.
  • the products are environmentally friendly and ecological, and are the transformation and upgrading direction of the synthetic leather industry. It will subvert the existing raw materials and processes of synthetic leather. VOC is close to 0.
  • the present invention uses a solvent-free polyurethane resin which is a two-component cross-linking curing type, and has a full film formation, and its physical properties far exceed that of solvent-based polyurethane, and has excellent resistance. Chemical properties, if the use of yellowing resistant aliphatic isocyanate, its yellowing resistance test is more than 4 grades.
  • the invention discloses a low VOC polyurethane synthetic leather, which is mainly divided into a surface layer and a foam layer.
  • the surface layer and the foam layer are prepared by using two-component solvent-free polyurethane, and the two-component online curing is utilized. The process is carried out by pouring and drying.
  • the two-component polyurethane resin is divided into two components, A ⁇ B.
  • the A component is a solvent-free hydroxy mixture resin portion
  • the B component is an isocyanate resin portion.
  • component A 100 parts of solvent-free polyester polyol mixed resin (Xuchuan), 0.1 parts of polyether modified polyorganosiloxane defoamer, 0.2 parts of CA-908 waterborne polyurethane thickener, Changhui BNK -LK600 leveling agent 0.2 parts, MOLYKOTE 557 silicone dry slip agent 0.1 part, dibutyl tin dilaurate 0.05 part, DT-100 cross-linking agent 0.3 part, solvent-free color paste 0.1 part, tertiary amine catalyst 0.1 part.
  • the specific preparation method comprises the following steps:
  • Casting fabric the solvent-free resin surface layer resin A component (including various additives) and B component according to the ratio of mass ratio 2:1.2, respectively, through the tank pressure to the solvent-free dry process equipment line Mix and pour onto release paper (plain paper) for uniform coating by spray gun casting machine. Dry at 80 ° C, drying time is about 4 minutes.
  • step 3 of the product After step 3 of the product is matured, the release paper is peeled off, and the desired low VOC polyurethane synthetic leather without any solvent is obtained.
  • Grain processing According to the requirements of the grain, the corresponding vacuum wheel is used to heat the 50° vacuum. Winding up and getting the finished product. Its VOC is close to 0, and its resistance to yellowing is more than 4 grades.
  • the low VOC polyurethane synthetic leather was prepared according to the method of Example 1, wherein the mass composition of the component A was 100 parts of the solventless polyester polyol mixed resin (Xuchuan), and the polyether modified polyorganosiloxane defoaming agent was 0.2 parts. , PUR62 water-based polymerization 0.3 parts of urethane thickener, 0.2 parts of Changhui BNK-LK600 leveling agent, 0.1 parts of Dow Corning 557 silicone dry slip agent, 0.1 parts of dibutyl tin dilaurate, 0.2 parts of DT-100 crosslinker, solvent-free color paste 0.1 part, 0.1 part of a tertiary amine catalyst. Its VOC is close to 0, and its resistance to yellowing is more than 4 grades.

Abstract

本发明公开了一种低VOC聚氨酯合成革及其制备方法，其包括面层和发泡层，所述面层和发泡层均采用双组份聚氨酯树脂制成，该双组份聚氨酯树脂由A组分和B组分制成，其中A组分为无溶剂羟基混合物树脂部分，B组分为异氰酸酯部分，A、B组分的用量分别以OH和NCO计二者的OH:NCO配比为2:1～1.5。该种低VOC聚氨酯合成革采用无溶剂聚氨酯树脂通过浇注设备制备而成，并且采用真空吸纹，突破了离型纸纹路的限制，产品环保、低耗，投资低、性能优异，将对合成革行业颠覆性的转型升级创造发明。

Description

一种低VOC聚氨酯合成革及其制备方法 技术领域
本发明属于合成革领域，具体涉及低VOC聚氨酯生态合成革及其制备方法。
背景技术
本项目目标产品主要采用无溶剂聚氨酯树脂替代传统溶剂型聚氨酯树脂来生产。目前国内停留于溶剂型树脂来生产，其DMF溶剂残留，在生产及使用场所造成环境污染问题不能得到彻底有效解决。
无溶剂生态合成革加工采用无溶剂聚氨酯树脂代替溶剂型树脂为原料，通过新型制革生产线制得革成品。无溶剂树脂不含有毒的有机化学溶剂，对环境无危害，达到生态环保的高要求。合成革上用无溶剂聚氨酯是目前最新的高科技材料。目前无溶剂聚氨酯制革技术主要由德国Basf公司、Bayer公司、等世界级知名公司研发、控制。我国合成革用无溶剂聚氨酯的研究起步相对较迟。国内的技术应用还处于简单品种的摸索阶段。
PU树脂在离型纸上的应用，是目前合成革生产的主流形式，聚氨酯合成革的纹路受到离型纸的种类限制。因此需寻找新的工艺，突破离型纸纹路少的限制。
发明内容
本发明的目的是采用无溶剂聚氨酯树脂替代传统溶剂型树脂，提供低VOC的生态合成革。
本发明的另一目的是提供一种上述无溶剂生态合成革新的制备工艺方法。
本发明的目的可以通过以下措施达到：
一种低VOC聚氨酯合成革，其包括面层和发泡层，所述面层和发泡层均采用双组份聚氨酯树脂制成，该双组份聚氨酯树脂由A组分和B组分制成，其中A组分为无溶剂羟基混合物树脂部分，B组分为异氰酸酯部分，A、B组分的用量分别以OH和NCO计二者的OH:NCO配比为2:1～1.5；所述A组分的质量组成为：无溶剂羟基混合物树脂100份，消泡剂0.1-0.4份，增稠剂0.1-0.4份，流平剂0.2-0.5份，有机硅干滑剂0.05-0.2份，催干剂0.05-0.1份，交联剂0.2-0.4份。
无溶剂羟基混合物树脂为无溶剂聚酯多元醇混合树脂或无溶剂聚醚多元醇混合树脂，优选为无溶剂聚酯多元醇混合树脂，该树脂国内的华峰、旭川等厂家均有生产。
所述异氰酸酯为甲苯二异氰酸酯。无溶剂羟基混合物树脂部分和异氰酸酯部分分别以OH和NCO计二者的OH:NCO配比优选为2:1.1～1.3(摩尔比)。
本申请中的消泡剂选自聚醚改性聚有机硅氧烷消泡剂；所述增稠剂选自CA-908水性聚氨酯增稠剂、K-800水性聚氨酯增稠剂或CA-902水性聚氨酯增稠剂。流平剂选自长辉BNK-LK600流平剂、D-3000水性聚氨酯流平剂或RA1103水性聚氨酯流平剂；所述有机硅干滑剂选自MOLYKOTE 557有机硅干滑剂或道康宁557有机硅干滑剂。催干剂为二月桂酸二丁基锡；所述交联剂选自DT-100交联剂、EVA中温交联剂、XR-100交联剂、DT-100W高温交联剂。
在A组分中可进一步包括色浆为无溶剂色浆，国内深蓝等均有销售与生产。催化剂选择与无溶剂树脂A组分多元醇部分的性质来确定，具体为叔胺类催化剂或有机金属类催化剂。
本低VOC聚氨酯合成革中的面层和发泡层利用双组份在线固化的工艺进行浇注烘干制得。该聚氨酯合成革的具体制备方法包括如下步骤：
A、浇注面料：将A组分与B组分根据配比分别通过料罐气压至无溶剂干法设备线上进行混合并浇注到离型纸上，通过喷枪浇注机实现均匀涂覆；80℃-100℃烘干，烘干时间为2～10min，制得面层树脂；
B、浇注发泡层树脂：将A组分与B组分根据配比分别通过料罐气压至无溶剂干法设备线上进行混合并浇注到上述烘干的面层树脂上，并进行100℃～120℃1～3min的半烘干；
C、贴合、熟化：将步骤B的半烘干的发泡层树脂贴合基布后进行100℃～120℃5～15min烘箱熟化；
D、分离收卷：上述步骤C到产品熟化后进行离型纸剥离，收卷得到所需的不含任何溶剂的低VOC聚氨酯合成革。
本法中的离型纸采取平纹纸，在步骤D的纹路处理中采用40℃～60℃真空吸纹操作，能破传统离型纸花纹少的限制，使产品能满足各种需求。
本发明的有益效果：
1.本发明从源头上杜绝了污染，所用原材料中不含任何有机溶剂，对生产者及使用者均无任何危害，产品环保、生态，为合成革行业转型升级方向。将颠覆合成革现有的生产原料及工艺。VOC接近0.
2.能耗低，因本产品不含溶剂，无需溶剂排放，无需排风装置，极大的降低了综合能 耗。
3.节约投资，因本产品不含溶剂，无需溶剂回收及废水处理装置，降低了投资规模。
4.产品质量优异：本发明为达到低VOC要求，采用的是无溶剂聚氨酯树脂属于双组份交联固化型，且成膜丰满，其物理性能远远超过溶剂型聚氨酯，具有极佳的耐化学品性能，若采用耐黄变的脂肪族异氰酸酯，其耐黄变性能测试超过4级以上。
具体实施方式
实施例1
一种低VOC聚氨酯合成革，该合成革主要分面层和发泡层，为彻底降低VOC,面层与发泡层均采用双组份无溶剂聚氨酯制备而成，利用双组份在线固化的工艺进行浇注烘干制得。双组份聚氨酯树脂分为A\B两个组分。A组分为无溶剂羟基混合物树脂部分，B组分为异氰酸酯树脂部分。A组分的质量组成：无溶剂聚酯多元醇混合树脂100份(旭川)，聚醚改性聚有机硅氧烷消泡剂0.1份，CA-908水性聚氨酯增稠剂0.2份，长辉BNK-LK600流平剂0.2份，MOLYKOTE 557有机硅干滑剂0.1份，二月桂酸二丁基锡0.05份，DT-100交联剂0.3份，无溶剂色浆0.1份，叔胺类催化剂0.1份。
具体制备方法包括如下步骤：
1.浇注面料：将无溶剂树脂面层树脂A组分(含各种助剂)与B组分根据配比按质量比2:1.2，分别通过料罐气压至无溶剂干法设备线上进行混合并浇注到离型纸(平纹纸)上，通过喷枪浇注机实现均匀涂覆。80℃烘干，烘干时间为4min左右。
2.浇注发泡层树脂：在上述烘干的面层树脂上，与步骤1工艺一样，浇注无溶剂的发泡层树脂A组分与B组分根据配比按质量比2:1.2比进行浇注，并进行100°烘干时间为2min半烘干。
3.贴合、熟化：将步骤2的半烘干的发泡层树脂贴合基布后进行烘箱熟化。100°烘干时间为6min,。
4.分离收卷：上述步骤3到产品熟化后进行离型纸剥离，收卷得到所需的不含任何溶剂的低VOC聚氨酯合成革
5.纹路处理：根据纹路要求，采用相应真空轮进行加热50°真空吸纹。收卷，得到成品。其VOC接近0，耐黄变性能测试超过4级以上。
实施例2
按实施例1的方法制备低VOC聚氨酯合成革，其中A组分的质量组成：无溶剂聚酯多元醇混合树脂100份(旭川)，，聚醚改性聚有机硅氧烷消泡剂0.2份，PUR62水性聚 氨酯增稠剂0.3份，长辉BNK-LK600流平剂0.2份，道康宁557有机硅干滑剂0.1份，二月桂酸二丁基锡0.1份，DT-100交联剂0.2份，无溶剂色浆0.1份，叔胺类催化剂0.1份。其VOC接近0，耐黄变性能测试超过4级以上。

Claims (10)

  1. 一种低VOC聚氨酯合成革，其特征在于其包括面层和发泡层，所述面层和发泡层均采用双组份聚氨酯树脂制成，该双组份聚氨酯树脂由A组分和B组分制成，其中A组分为无溶剂羟基混合物树脂部分，B组分为异氰酸酯部分，A、B组分的用量分别以OH和NCO计二者的OH:NCO配比为2:1～1.5；所述A组分的质量组成为：无溶剂羟基混合物树脂100份，消泡剂0.1-0.4份，增稠剂0.1-0.4份，流平剂0.2-0.5份，有机硅干滑剂0.05-0.2份，催干剂0.05-0.1份，交联剂0.2-0.4份，无溶剂色浆0.1-0.4份，催化剂0.1-0.4份。
  2. 根据权利要求1所述的低VOC聚氨酯合成革，其特征在于所述无溶剂羟基混合物树脂为无溶剂聚酯多元醇混合树脂或无溶剂聚醚多元醇混合树脂；所述异氰酸酯为甲苯二异氰酸酯。
  3. 根据权利要求2所述的低VOC聚氨酯合成革，其特征在于所述无溶剂羟基混合物树脂为无溶剂聚酯多元醇混合树脂；所述异氰酸酯为甲苯二异氰酸酯；无溶剂羟基混合物树脂部分和异氰酸酯部分分别以OH和NCO计二者的OH:NCO配比为2:1.1～1.3。
  4. 根据权利要求1所述的低VOC聚氨酯合成革，其特征在于所述消泡剂选自聚醚改性聚有机硅氧烷消泡剂；所述增稠剂选自CA-908水性聚氨酯增稠剂、K-800水性聚氨酯增稠剂或CA-902水性聚氨酯增稠剂。
  5. 根据权利要求1所述的低VOC聚氨酯合成革，其特征在于所述流平剂选自长辉BNK-LK600流平剂、D-3000水性聚氨酯流平剂或RA1103水性聚氨酯流平剂；所述有机硅干滑剂选自MOLYKOTE 557有机硅干滑剂或道康宁557有机硅干滑剂。
  6. 根据权利要求1所述的低VOC聚氨酯合成革，其特征在于所述催干剂为二月桂酸二丁基锡；所述交联剂选自DT-100交联剂、EVA中温交联剂、XR-100交联剂、DT-100W高温交联剂。
  7. 根据权利要求1所述的低VOC聚氨酯合成革，其特征在于所述催化剂为叔胺类催化剂或有机金属类催化剂。
  8. 根据权利要求1所述的低VOC聚氨酯合成革，其特征在于所述面层和发泡层利用双组份在线固化的工艺进行浇注烘干制得。
  9. 权利要求1所述的低VOC聚氨酯合成革的制备方法，其特征在于包括如下步骤：
    A、浇注面料：将A组分与B组分根据配比分别通过料罐气压至无溶剂干法设备线上进行混合并浇注到离型纸上，通过喷枪浇注机实现均匀涂覆；80℃-100℃烘干，烘干时间为2～10min，制得面层树脂；
    B、浇注发泡层树脂：将A组分与B组分根据配比分别通过料罐气压至无溶剂干法设备线上进行混合并浇注到上述烘干的面层树脂上，并进行100℃～120℃1～3min的半烘干；
    C、贴合、熟化：将步骤B的半烘干的发泡层树脂贴合基布后进行100℃～120℃5～15min烘箱熟化；
    D、分离收卷：上述步骤C到产品熟化后进行离型纸剥离，收卷得到所需的不含任何溶剂的低VOC聚氨酯合成革。
  10. 根据权利要求9所述的方法，其特征在于所述离型纸采取平纹纸，在步骤D的纹路处理中采用40℃～60℃真空吸纹操作。
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