Synthetic leather and manufacturing method thereof

A technology of synthetic leather and manufacturing method, applied in textiles and papermaking, etc., can solve the problems of peeling, wrinkling, loss of hand feeling of synthetic leather, etc., and achieve the effect of excellent bending resistance

Active Publication Date: 2019-05-14
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented inventive artificially made plastic material has good qualities such as flexibility or durability for use with various products like clothing items that require high levels of comfort during wear time without causing damage from sharp edges or cracks caused by rubbing against other materials.

Problems solved by technology

The technical problem addressed in this patented technology relates to finding ways to improve the properties of an aliphatic type chemical called Polyurea without causing unwanted effects such as volatilization during curing processes.

Method used

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  • Synthetic leather and manufacturing method thereof
  • Synthetic leather and manufacturing method thereof

Examples

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Embodiment

[0067] Hereinafter, the present invention will be described in more detail using examples.

Synthetic example 1

[0068] [Synthesis Example 1] Synthesis of Urethane Prepolymer (A-1)

[0069] 100 parts by mass of 4,4'-diphenylmethane diisocyanate (hereinafter, abbreviated as "MDI"), 50 parts by mass of Polytetramethylene glycol (number average molecular weight: 2,000, hereinafter abbreviated as "PTMG"), 50 parts by mass of polyester polyol (6 molar adduct of propylene oxide of bisphenol A and sebacic acid The reactant, number average molecular weight: 2,000, hereinafter abbreviated as "PEs (1)") was reacted at 80° C. for 3 hours to obtain NCO%: 14.7% by mass of a urethane prepolymer.

[0070] Next, 2-hydroxyethyl acrylate (hereinafter, abbreviated as "HEA") was added and reacted at 60° C. for 2 hours to obtain an acryloyl group introduced into 15 mol % of the remaining isocyanate groups (that is, the molar ratio [isocyanate group / polymerizable unsaturated group] = 85 / 15) urethane prepolymer (A-1).

Synthetic example 2

[0071] [Synthesis Example 2] Synthesis of Urethane Prepolymer (A-2)

[0072] Add 100 mass parts of MDI, 50 mass parts of PTMG, 50 mass parts of polyester polyol (ethylene glycol and 1,4- The reactant of butanediol and sebacic acid, number average molecular weight: 2,000, hereinafter abbreviated as "PEs (2)"), was reacted at 80°C for 3 hours to obtain NCO%: 14.6% by mass of urethane pre Polymer.

[0073] Then, HEA was added and reacted at 60° C. for 2 hours to obtain an acryloyl group introduced into 15 mol % of the remaining isocyanate groups (that is, molar ratio [isocyanate group / polymerizable unsaturated group] = 85 / 15). Urethane prepolymer (A-2).

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Abstract

The invention aims to provide a synthetic leather, which has good hand feeling, high peeling strength, and excellent bending resistant properties. The synthetic leather has a layer made of a polycarbamate composition, which comprises following components: a main agent (i) containing a carbamate prepolymer (A) and a hardening agent (ii) containing polyol (B). The carbamate prepolymer (A) comprisesan isocyanate group and polymeric unsaturated groups. The mole ratio of isocyanate group to polymeric unsaturated groups is 75/25-98/2. The layer formed by the polycarbamate composition preferably comprises a foamed structure. Preferably, the polycarbamate composition is foamed by a gas filling method and/or a water foaming method.

Description

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Claims

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Application Information

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Owner DIC CORP
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