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Polyurethane resin composition, coating agent, polyurethane resin composition for forming skin layer of leather-like sheet, laminate, and leather-like sheet

一种聚氨酯树脂、皮革样片材的技术，应用在聚脲/聚氨酯涂料、合成树脂层状产品、涂层等方向，能够解决剥落、皮膜二次粘接性不够充分等问题

Active Publication Date: 2015-12-16
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since the film formed using the coating material is still insufficient in secondary adhesiveness, there is still a possibility that the film formed using the coating material and the adhesive or the like will be peeled off over time. Happening
In particular, when a thermoplastic polyurethane resin composition is used as the pattern member or filler material, it may cause peeling from the surface of the film over time.

Method used

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  • Polyurethane resin composition, coating agent, polyurethane resin composition for forming skin layer of leather-like sheet, laminate, and leather-like sheet
  • Polyurethane resin composition, coating agent, polyurethane resin composition for forming skin layer of leather-like sheet, laminate, and leather-like sheet
  • Polyurethane resin composition, coating agent, polyurethane resin composition for forming skin layer of leather-like sheet, laminate, and leather-like sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] In a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a nitrogen blowing tube, under nitrogen flow, add 400 parts by mass of polyoxytetramethylene glycol (weight-average molecular weight: 2000), which has an oxyethylene structure and oxygen Polyether polyol composed of random polymers with tetramethylene structure (weight average molecular weight 1800, mass ratio of oxyethylene structure to oxytetramethylene structure [oxyethylene structure / oxytetramethylene structure]=55 / 45) 144 Parts by mass, 13.4 parts by mass of dimethylolpropionic acid, 380.7 parts by mass of methyl ethyl ketone, after uniformly mixing, add 149.5 parts by mass of dicyclohexylmethane diisocyanate, then add 0.1 part by mass of dibutyltin dilaurate, and react at 80°C For about 4 hours, a methyl ethyl ketone solution of a urethane prepolymer (isocyanate group content: 1.5% by mass) having an isocyanate group at a molecular terminal was thus obtained.

[0116] Then, cool...

Embodiment 2

[0118] In a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a nitrogen blowing tube, under a nitrogen stream, 300 parts by mass of polyoxytetramethylene glycol (weight-average molecular weight: 2000) was added. Polyether polyol composed of a random polymer of tetramethylene structure (weight-average molecular weight 1800, mass ratio of oxyethylene structure to oxytetramethylene structure [oxyethylene structure / oxytetramethylene structure]=55 / 45) 270 Parts by mass, 10.1 parts by mass of dimethylol propionic acid, 6.8 parts by mass of 1,4-butanediol, 391 parts by mass of methyl ethyl ketone, after uniformly mixing, add 140 parts by mass of isophorone diisocyanate, and then add dilauric acid 0.1 mass part of dibutyltin was reacted at 80 degreeC for about 4 hours, and the methyl ethyl ketone solution of the urethane prepolymer (isocyanate group content: 1.4 mass %) which has an isocyanate group at a molecular terminal was obtained.

[0119] Then, ...

Embodiment 3

[0121] In a four-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a nitrogen blowing tube, under nitrogen flow, add 400 parts by mass of polyoxytetramethylene glycol (weight-average molecular weight: 3000), which has an oxyethylene structure and oxygen Polyether polyol composed of random polymers with tetramethylene structure (weight average molecular weight 1800, mass ratio of oxyethylene structure to oxytetramethylene structure [oxyethylene structure / oxytetramethylene structure]=55 / 45)72 Parts by mass, 17.9 parts by mass of dimethylolpropionic acid, 341.7 parts by mass of methyl ethyl ketone, after uniformly mixing, add 144.8 parts by mass of dicyclohexylmethane diisocyanate, then add 0.1 part by mass of dibutyltin dilaurate, and react at 80°C For about 4 hours, a methyl ethyl ketone solution of a urethane prepolymer (isocyanate group content: 2.1% by mass) having an isocyanate group at a molecular terminal was thus obtained.

[0122] Then, cool t...

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Abstract

The problem to be solved by the present invention is to provide a polyurethane resin composition capable of forming a film having excellent adhesion to adhesives, fillers, etc., and excellent durability such as heat and humidity resistance and hydrolysis resistance. The polyurethane resin composition of the present invention is characterized in that it contains a polyurethane resin (C) obtained by reacting a polyol (A) and a polyisocyanate (B), and the polyol (A) contains (a1- 1) Polyether polyol (a1), polyoxytetramethylene glycol (a2) and / or polycarbonate diol of an oxyalkylene structure (a1-[) other than the oxyethylene structure (a1-1) (a3), the polyether polyol (a1) is a material in the range of mass ratio [(a1-1) / (a1-2)]=3 / 7 to 9 / 1, and the polyether polyol ( The mass ratio of a1) is 10-50 mass %.

Description

technical field [0001] The present invention relates to a polyurethane resin composition that can be used in the fields of coating agents and adhesives, and is particularly suitable for forming skin layers of leather-like sheets and the like. Background technique [0002] Urethane resins are used in various applications including coating agents because they can form cured products such as films with relatively good flexibility. [0003] Generally speaking, the coating agent, especially the coating agent used for the surface coating of various substrates and the formation of the skin layer thereof, is required to be able to form durable materials such as heat and humidity resistance and hydrolysis resistance. Etc. skin. In addition, in recent years, as the application range of the coating agent has widened, various properties such as secondary adhesiveness and adhesiveness have been required in addition to the durability and the like. [0004] The secondary adhesiveness is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48B32B27/40C09D5/02C09D175/08D06N3/14
CPCC08G18/0823C08G18/44C08G18/4854C08G18/6659C08G18/6692C08G18/758C09D5/28C09D175/04D06N3/14D06N2211/28C08G18/4804C08G2170/80B32B7/12B32B27/40D06N3/0097D06N3/146Y10T428/249921B32B27/12C08G18/12C08G18/3234C08G18/3246C08G18/3228C08L75/04
Inventor 千代延一彦田中宽树后藤直孝上口美和
Owner DIC CORP