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Flame-retardant polyurethane microcapsule as well as preparation method and use method thereof

A polyurethane microcapsule, flame-retardant technology, applied in the field of flame-retardant polyurethane materials, can solve the problems of large capsule size and environmental pollution

Active Publication Date: 2021-03-30
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method involved in this patent uses two solvents, cyclohexane and acetone, which has environmental pollution problems, and the particle size is 20-40 μm, and the capsule size is large

Method used

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  • Flame-retardant polyurethane microcapsule as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of microcapsules: (1) react 100g PEG1000 and 210g T-80 at 80-85°C for 2h for later use; (2) mix 1.23g of emulsifier: sodium lauryl sulfate and 1.23g of dispersant: seaweed Sodium bicarbonate was added to 90°C deionized water, stirred to dissolve, and then placed at room temperature; (3) 10g of flame retardant was added to (2) solution, and stirred and dispersed at 3000rpm for 20min; (4) Added to (2) ) was added 5.26g BDO and 0.15g T12, and the dispersion was maintained at 3000rpm for 10min; (5) 17.6g of spare prepolymer (1) was added to (2), and the rotation speed was increased to 3500rpm, and the stirring reaction was continued for 2h, after drying, Obtain flame-retardant polyurethane microcapsule powder. SEM electron microscope picture as figure 1 shown.

[0034] Preparation of the elastomer:

[0035] (1) Mix the prepared 1.26g of flame-retardant polyurethane microcapsule powder with 100g of polyol, heat and stir, the material temperature rises to 90-12...

Embodiment 2

[0038] Preparation of microcapsules: (1) react 100g PEG1000 and 150g T-80 at 80-85°C for 2h for later use; (2) mix 1.23g of emulsifier: sodium lauryl sulfate and 1.23g of dispersant: seaweed Sodium acid was added to 90°C deionized water, stirred to dissolve, and then placed at room temperature; (3) 10g of flame retardant was added to (2) solution, and stirred and dispersed at 3300rpm for 20min; (4) Added to (2) ) was added 5.26g BDO and 0.12g T12, and the dispersion was maintained at 3300rpm for 10min; (5) 17.6g of spare prepolymer (1) was added to (2), the speed was increased to 3500rpm, and the stirring reaction was continued for 2h, after drying, Obtain flame-retardant polyurethane microcapsule powder;

[0039] Preparation of the elastomer:

[0040] (1) Mix 3.78g of the prepared flame-retardant polyurethane microcapsule powder with 100g of polyol, heat and stir, the temperature of the material rises to 90-120°C, vacuum dehydrate for 1-3 hours and drop to room temperature f...

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Abstract

The invention discloses a flame-retardant polyurethane microcapsule as well as a preparation method and a use method thereof, and the flame-retardant polyurethane microcapsule is composed of a capsulewall and a capsule core substance, and comprises the following components in percentage by mass: 10-40% of polyol, 40-55% of isocyanate, 2-10% of an emulsifier, 2-10% of a dispersing agent, 10-25% ofa chain extender, 0.3-0.7% of a catalyst and 20-30% of a flame retardant. The flame-retardant polyurethane microcapsule is in a regular spherical shape, the particle size is 0.5-3 microns, which is uniform and small. When the flame-retardant capsule is applied to a polyurethane elastomer, the microcapsule is good in dispersity, good mechanical properties of a base material are maintained, and theflame-retardant property of the microcapsule is enhanced. The addition amount of the flame-retardant polyurethane capsule in the elastomer raw material is 1-3% of the mass of the polyol component.

Description

technical field [0001] The invention relates to the technical field of flame-retardant polyurethane materials, in particular to flame-retardant polyurethane microcapsules and a preparation method and application thereof. Background technique [0002] Polyurethane is widely used in transportation, construction, aerospace and other fields, but it is extremely flammable and belongs to flammable materials. At present, among the methods used to improve the flame retardancy of polyurethane at home and abroad, the most common method is to add flame retardants. The green environmental protection and easy storage of flame retardants are the biggest requirements for their application at present. Microcapsule technology refers to the processing technology of coating the core material with natural or synthetic polymer materials to form a nano-scale skin-core structure, so as to change the physical and chemical properties of the core material or control the slow release of the core mate...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K9/10C08K3/32C08K5/523C08K5/5333C08K5/521B01J13/14
CPCC08K9/10C08K3/32C08K5/523C08K5/5333C08K5/521B01J13/14C08L2201/02C08K2003/323C08L75/04
Inventor 尹璐石雅琳苏丽丽
Owner LIMING RES INST OF CHEM IND
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