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A kind of waterproof polyurethane coating for zipper and preparation method thereof

A polyurethane coating, polyurethane prepolymer technology, applied in the direction of coating, can solve the problems of coating stretchability, poor toughness, zipper not having washability, affecting clothing texture, etc., to improve mechanical properties and waterproof. properties, improving cross-linking stability, and improving mechanical properties

Active Publication Date: 2020-06-23
东莞市瑞翔新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing waterproof coatings have the following problems: 1. The formed coating has poor stretchability and toughness. In the process of repeated bending of the zipper tape, the coating is easy to crack, which affects the texture of the clothing; 2. Most of the existing waterproof coatings are solvent-based coatings, and there are very few water-based coatings, and generally water-based coatings do not perform well in water resistance, so the zipper will not be washable.

Method used

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  • A kind of waterproof polyurethane coating for zipper and preparation method thereof
  • A kind of waterproof polyurethane coating for zipper and preparation method thereof
  • A kind of waterproof polyurethane coating for zipper and preparation method thereof

Examples

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Embodiment 1

[0032] A preparation method for a waterproof polyurethane coating material for slide fasteners, comprising the steps of:

[0033](1) Preparation of polyurethane prepolymer: 50 parts by weight of polyether polyol, 0.5 parts by weight of catalyst, and 25 parts by weight of isocyanate are mixed, and the temperature is raised to 60° C. to obtain a mixed solution, and 7.5 parts by weight of composite fibers are added to the mixed solution. and 7 parts by weight of chain extender, heat up to 75°C, and react for 5.2h to obtain a polyurethane prepolymer;

[0034] (2) Preparation of coating: adding 12.5 parts by weight of composite fibers, 20 parts by weight of reactive diluent monomers, 0.5 parts by weight of photoinitiator and the polyurethane prepolymer obtained in step (1) into 15 parts by weight of deionized water, After stirring at 1300 rpm for 12.5 minutes, 8 parts by weight of a leveling agent was added, and the mixture was stirred at 500 rpm for 7 minutes to obtain the waterpr...

Embodiment 2

[0045] A preparation method of a waterproof polyurethane coating material for a zipper, comprising the following steps:

[0046] (1) Preparation of polyurethane prepolymer: 40 parts by weight of polyether polyol, 0.1 part by weight of catalyst, and 20 parts by weight of isocyanate were mixed, and the temperature was raised to 50° C. to obtain a mixed solution, and 5 parts by weight of composite fibers were added to the mixed solution. and 4 parts by weight of chain extender, heat up to 70°C, and react for 3.5h to obtain a polyurethane prepolymer;

[0047] (2) Preparation of coating: adding 5 parts by weight of composite fibers, 15 parts by weight of reactive diluent monomers, 1 part by weight of photoinitiator and the polyurethane prepolymer obtained in step (1) into 10 parts by weight of deionized water, After stirring at 1200 rpm for 10 min, 6 parts by weight of leveling agent were added, and the mixture was stirred at 400 rpm for 4 min to obtain the waterproof polyurethane ...

Embodiment 3

[0058] A preparation method of a waterproof polyurethane coating material for a zipper, comprising the following steps:

[0059] (1) Preparation of polyurethane prepolymer: 60 parts by weight of polyether polyol, 1 part by weight of catalyst, and 30 parts by weight of isocyanate are mixed, and the temperature is raised to 70° C. to obtain a mixed solution, and 10 parts by weight of composite fibers are added to the mixed solution. and 10 parts by weight of chain extender, heat up to 80 ° C, and react for 7 h to obtain a polyurethane prepolymer;

[0060] (2) Preparation of coating: adding 20 parts by weight of composite fibers, 25 parts by weight of reactive diluent monomers, 2 parts by weight of photoinitiator and the polyurethane prepolymer obtained in step (1) into 20 parts by weight of deionized water, After stirring at 1400rpm for 15min, 10 parts by weight of leveling agent was added, and the mixture was stirred at 600rpm for 10min to obtain the waterproof polyurethane coa...

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Abstract

The invention relates to the technical field of waterproof coatings for zippers, in particular to a waterproof polyurethane coating for a zipper and a preparation method thereof. The waterproof polyurethane coating is prepared from polyester polyol, isocyanate, composite fiber, a chain extender, a catalyst, an active diluting monomer, a photoinitiator, a leveling agent and deionized water, whereinthe composite fiber is composed of nano-cellulose silk and a polyacrylamide layer wrapped around the nano-cellulose silk. According to the waterproof polyurethane coating and the preparation method thereof, the nano-cellulose silk is coated and modified through the polyacrylamide layer, so that the nano-cellulose silk can have stable suspension property in the coating, the dispersion of the nano-cellulose silk in the coating is facilitated, the polyacrylamide layer has more hydroxyl groups, the polyacrylamide layer and the isocyanate can be subjected to cross-linking polymerization, the carbon-carbon double bonds of the polyacrylamide layer can be subjected to polymerization reaction with the active diluting monomer under the action of the photoinitiator, the dispersion stability of the composite fiber is further improved, and the coating can have good tensile property, toughness and waterproofness.

Description

technical field [0001] The invention relates to the technical field of zipper waterproof coatings, in particular to a waterproof polyurethane coating used for zippers and a preparation method thereof. Background technique [0002] A zipper is a connecting piece that relies on continuously arranged chain elements to merge or separate items. It is now widely used in clothing, bags, tents, etc. Nowadays, there are many kinds of zippers, and some functional clothing, such as jackets, need to have a waterproof effect. In the existing zipper clothing, due to the water absorption of the fiber, water can easily penetrate from the zipper tape, thereby limiting the application of the zipper on waterproof clothing. [0003] Coating waterproof paint on the zipper tape to form a waterproof layer is one of the methods that can improve the water resistance of the zipper tape. However, the existing waterproof coatings have the following problems: 1. The formed coating has poor stretchabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C09D4/06C09D7/65
CPCC09D4/06C09D7/65C09D7/70
Inventor 吴小锐
Owner 东莞市瑞翔新型材料科技有限公司
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