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Waterborne polyurethane dispersion and method for preparing same

A water-based polyurethane and dispersion technology, applied in polyurea/polyurethane coatings, leather surface treatment, coatings, etc., can solve problems such as stickiness

Pending Publication Date: 2021-12-21
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, synthetic leather produced using aqueous polyurethane dispersions has been reported to have many problems, such as stickiness

Method used

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  • Waterborne polyurethane dispersion and method for preparing same
  • Waterborne polyurethane dispersion and method for preparing same
  • Waterborne polyurethane dispersion and method for preparing same

Examples

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example

[0123] Some embodiments of the invention will now be described in the following examples, in which all parts and percentages are by weight unless otherwise indicated.

[0124] Information on the raw materials used in the examples is listed in Table 1 below:

[0125] Table 1. Raw materials used in the examples:

[0126]

[0127]

[0128] By adding the isocyanate prepolymer shown in Table 1 (Voralast TM GE 143ISO) was combined with the polyol raw materials listed in Table 2 to prepare 2K non-solvent PU foam.

[0129] Table 2. Polyol raw materials used in 2K PU composites

[0130]

[0131] In the following examples, a synthetic leather article comprising a skin film derived from an aqueous polyurethane dispersion and a 2k PU base layer was prepared by the following steps 1) to 4).

[0132] 1) Preparation of waterborne polyurethane dispersion

[0133] Charge 7112T (25.00 g), IPDI (11.11 g) and OH-terminated siloxane (if present) into a 1000 ml three-neck flask and mi...

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Abstract

A waterborne polyurethane dispersion is provided. The waterborne polyurethane dispersion comprises residual moiety of a hydroxy-terminated siloxane compound in the main chain and exhibits good anti-stickiness and / or wet color fastness while retaining superior mechanical properties. A laminated synthetic leather article prepared with said waterborne polyurethane dispersion as well the method for preparing the synthetic leather article are also provided.

Description

technical field [0001] The present disclosure relates to an aqueous polyurethane dispersion and a method for preparing the same, a laminated synthetic leather article comprising a skin film derived from the aqueous polyurethane dispersion, and a method for preparing the same. Laminated synthetic leather articles prepared from aqueous polyurethane dispersions exhibit excellent anti-blocking properties, mechanical properties and wet color fastness. Background technique [0002] Synthetic leather finds a wide variety of applications in people's everyday lives, from clothing, footwear, bags and luggage, home decorations to car seats. Synthetic leather offers similar properties and feel to natural leather at a cost advantage. Synthetic leather is manufactured by coating polymers on or impregnating polymers into a fabric substrate, and the most commonly used polymer is polyurethane (PU). Currently, most of the PU leather is made of solvent-based PU, but the evaporation of the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/61C08G18/12C08G18/06C09D175/04C14C11/00
CPCC08G18/12C08G18/61C09D175/04C08G18/755C08G18/0823C08G18/0866C09D175/06C08G18/246C08G18/3228C08G18/10C08G18/3206C08G18/632C08G18/4829C08G18/6674C08G18/485C08G18/42C08G18/6651C08G2101/00C08G2110/0083C08G18/4812C08G18/2063C08G18/18D06N3/14D06N3/147D06N3/128C08G18/48C08G18/63C08G18/66C08G18/3893C08G18/348C08G18/6541C08J5/18C08J2375/04C08J2475/04C08L75/04C08L2203/16C08G2150/00
Inventor 冯艳丽倪秀元包铭庞凌云陈红宇冯少光
Owner DOW GLOBAL TECH LLC
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