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Flame-retardant polyurethane and preparation method thereof

A polyurethane and flame-retardant technology, applied in the field of flame-retardant polyurethane and its preparation, can solve the problems of easy migration, low hardness, poor matrix compatibility, etc., and achieve the effect of simple process, good performance and long-lasting flame retardancy

Active Publication Date: 2022-04-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN201910348766.1 discloses a polyurethane with synergistic flame retardancy of ammonium polyphosphate and magnesium hydroxide, which not only retains the thermal insulation performance of polyurethane, but also combines the good flame retardancy of ammonium polyphosphate and magnesium hydroxide, but essentially belongs to Additive flame retardants have disadvantages such as easy migration and poor compatibility with the matrix
Patent CN95104528.8 discloses a polyurethane elastomer mainly composed of polydiene polyol and castor oil. The addition of castor oil can effectively improve mechanical properties such as tensile strength, and the prepared polyurethane elastomer has good Cushioning performance, but lower hardness

Method used

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  • Flame-retardant polyurethane and preparation method thereof
  • Flame-retardant polyurethane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Preparation of component A

[0033] In parts by weight, 50 parts of hydroxyl-terminated polybutadiene, 10 parts of polycaprolactone diol, 30 parts of polypropylene glycol, 10 parts of trimethylolpropane, 5 parts of 9,10-dihydro-9-oxygen Hetero-10-phosphaphenanthrene-10-oxide was stirred at 1000 rpm and vacuum at 120°C for 3 hours, mixed evenly and cooled to 50°C to obtain the component A.

[0034] (2) Take 56 parts of component A and 40 parts of component B (4,4'-diphenylmethane diisocyanate) in the same container, and stir at room temperature for 5 minutes until the mixture is uniform to obtain a solvent-free two-component polyurethane.

Embodiment 2

[0036] (1) Preparation of component A

[0037] In parts by weight, 60 parts of hydroxyl-terminated polybutadiene, 10 parts of polycaprolactone triol, 10 parts of polypropylene glycol, 5 parts of trimethylolethane, 10 parts of 9,10-dihydro-9- Oxa-10-phosphaphenanthrene-10-oxide, stirred at 1500 rpm and vacuum at 100°C for 3 hours, mixed uniformly and cooled to 70°C to obtain the component A.

[0038] (2) Take 60 parts of component A and 40 parts of component B (toluene diisocyanate) in the same container, stir at room temperature for 6 minutes until they are evenly mixed to obtain a solvent-free two-component polyurethane.

Embodiment 3

[0040] (1) Preparation of component A

[0041] In parts by weight, 40 parts of hydroxyl-terminated polybutadiene, 25 parts of polycaprolactone diol, 25 parts of polypropylene glycol, 10 parts of trimethylolpropane, 10 parts of 9,10-dihydro-9-oxygen Hetero-10-phosphaphenanthrene-10-oxide was stirred at 1600 rpm and vacuum at 110°C for 2.5 hours, mixed evenly and cooled to 50°C to obtain the component A.

[0042] (2) Take 60 parts of component A and 40 parts of component B (toluene diisocyanate) in the same container, stir at room temperature for 8 minutes until they are evenly mixed to obtain a solvent-free two-component polyurethane.

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Abstract

The invention provides flame-retardant polyurethane and a preparation method thereof, and belongs to the technical field of new material preparation. The flame-retardant polyurethane comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 40-60 parts of hydroxyl-terminated polybutadiene, 10-30 parts of polymer polyol, 10-30 parts of polypropylene glycol, 5-10 parts of a cross-linking agent and 5-10 parts of a flame retardant; the component B is isocyanate; the component A and the component B in the polyurethane are mixed according to the weight ratio of (1.4-1.6): 1. The DOPO and the HTPB are added at the same time, the good mechanical property and flame retardant property can be guaranteed, the requirements for equipment and the environment are low, the technology is simple, operation is convenient, and economical efficiency is good.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a flame-retardant polyurethane and a preparation method thereof. Background technique [0002] Polyurethane (PU) is a block polymer formed by the reaction of diisocyanate or polyisocyanate (hard segment) and polyol (soft segment) with more than 2 hydroxyl groups. The PU main chain contains many carbamate groups, so a large number of hydrogen bonds can be formed in the molecule and between the molecules, so that physical cross-linking occurs in the molecular chain. Due to the thermodynamic incompatibility of the cross-linked soft and hard phases, it makes The aggregation of hard segments and soft segments leads to microphase separation, that is, the uniform cross distribution of soft and hard segments acts as an elastic crosslinking effect, which makes polyurethane have excellent mechanical properties and various characteristics such as insulation, oil resistance, hydrolysis r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/69
CPCC08G18/696C08G18/698Y02E60/10
Inventor 陈国清樊洋任明法李明浩
Owner DALIAN UNIV OF TECH
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