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A kind of organosilicon modified flame retardant polyurethane and its preparation

A polyurethane and silicone technology, applied in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve problems such as low temperature resistance, flammability, flame retardancy, poor stain resistance, and poor weather resistance. Achieve the effect of improving product performance, excellent mechanical properties, and improving flame retardancy

Active Publication Date: 2020-12-29
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a polyurethane material modified by organosilicon and organophosphorus, which has improved heat resistance, flame retardancy and mechanical properties, and has low surface energy, good hydrophobicity and antifouling performance ; To solve the problems of poor weather resistance, poor stain resistance, high temperature resistance, poor inflammability and flame retardancy and toxicity of polyurethane adhesives in the prior art

Method used

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  • A kind of organosilicon modified flame retardant polyurethane and its preparation
  • A kind of organosilicon modified flame retardant polyurethane and its preparation
  • A kind of organosilicon modified flame retardant polyurethane and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 20 parts by weight of double-ended hydroxyethyl silicone oil with a molecular weight of 2000, 4 parts by weight of PTMG-1000, and a catalyst into the reaction bottle, and heat to 120° C. for 2 hours in vacuum. Cool down to room temperature, add 19 parts by weight of MDI-50, and heat up to 80°C for reaction. Titrate the isocyanate content with the di-n-butylamine acetone method, reach the predetermined value, stop the reaction, and obtain A 1 components.

[0037] Add 20 parts by weight of PPG-1000D and 8 parts by weight of PPG-3050D into the reaction bottle, heat to 120°C and vacuum dry for 2 hours. Cool down to room temperature, add 20 parts by weight of MDI-50, heat up to 80°C for reaction, titrate the isocyanate content with the di-n-butylamine acetone method, and stop the reaction to obtain A 2 components.

[0038] Add 80 parts by weight of PPG-2000D, 40 parts by weight of PPG-3050D and 0.48 parts by weight of catalyst into the reaction bottle, and dry it unde...

Embodiment 2

[0041] Add 20 parts by weight of double-ended hydroxypropyl silicone oil with a molecular weight of 3000, 5 parts by weight of PCL-2000, and a catalyst into the reaction bottle, and heat to 120° C. for 2 hours in vacuum. Cool down to room temperature, add 16 parts by weight of MDI-50, and heat up to 60°C for reaction. Titrate the isocyanate content with the di-n-butylamine acetone method, reach the predetermined value, stop the reaction, and obtain A 1 components.

[0042] Add 20 parts by weight of PEG-2000 and 4 parts by weight of PPG-3050D into the reaction bottle, heat to 120°C and vacuum dry for 2 hours. Cool down to room temperature, add 17 parts by weight of MDI-50, and heat up to 80°C for reaction. Titrate the isocyanate content with the di-n-butylamine acetone method, reach the predetermined value, stop the reaction, and obtain A 2 components.

[0043] Add 100 parts by weight of PPG-2000D, 20 parts by weight of PPG-3050D and 0.48 parts by weight of catalyst into th...

Embodiment 3

[0046] Add 20 parts by weight of double-ended hydroxypropyl polyether modified silicone oil with a molecular weight of 1000, 4 parts by weight of PPG-3050D, and a catalyst into a reaction bottle, and heat to 120° C. for 2 hours in vacuum. Cool down to room temperature, add 18 parts by weight of MDI-50, and heat up to 90°C for reaction. Titrate the isocyanate content with the di-n-butylamine acetone method, reach the predetermined value, stop the reaction to obtain A 1 components.

[0047] Add 40 parts by weight of PPG-4000D and 10 parts by weight of PPG-3050D into the reaction bottle, heat to 120°C and vacuum dry for 2 hours. Cool down to room temperature, add 27 parts by weight of MDI-50, and heat up to 70°C for reaction. Titrate the isocyanate content with the di-n-butylamine acetone method, reach the predetermined value, stop the reaction, and obtain A 2 components.

[0048] Add 60 parts by weight of PPG-2000D, 30 parts by weight of PPG-3050D and 0.36 parts by weight of...

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Abstract

The invention relates to organic silicon modified flame-retardant polyurethane and a preparation. The environment-friendly weather-resisting flame-retardant polyurethane is prepared by co-polymerizinghydroxyalkyl silicone oil, MDI-50, polyether polyalcohol, polyester polyalcohol, an amine chain extender, and a reaction-type organic phosphorus flame-retardant agent, an organic silicon chain segment and an organic phosphorus structural unit are introduced into a polyurethane main chain by virtue of chemical bonding way, so that the material can reserve the original advantages of polyurethane, can also improve the performance of polyurethane such as water resistance, weather resistance, heat resistance, flame retardance, mechanical performance, has good durance, and can prolong the outdoor service life. By regulating and controlling the silicone oil content, the chain extender content and the soft hard segment content in the organic silicon modified polyurethane, the product can better meet the application requirements. The problems of the existing polyurethane which is not resistant to heat, water and contamination can be solved, the flame retardance of polyurethane can be improved,and the organic silicon modified polyurethane conforms to an environment-friendly material. The synthetic process is simple, no solvent is used, and by adopting the double-component synthetic method,the product performance can be improved by adjusting the proportion of the two components.

Description

technical field [0001] The invention belongs to the field of modified flame-retardant polyurethane, in particular to a solvent-free and durable organic silicon modified flame-retardant polyurethane material or adhesive. Background technique [0002] Polyurethane is the abbreviation of polyurethane, and any compound containing many carbamate or ureido repeating units in the main polymer chain is collectively called polyurethane. The performance of polyurethane depends on the chemical composition of the chain, the length of soft and hard segments, the degree of crosslinking, and the interaction between segments. Since the physical cross-linking of polyurethane is destroyed at high temperature, its tensile strength, tear strength, and oil resistance all decrease significantly with the increase of temperature. Although the polyurethane material has good elasticity, its hysteresis loss is relatively large, and in the state of repeated denaturation, it generates high heat. In ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/61C08G18/32C08G18/12C09J175/08
CPCC08G18/12C08G18/324C08G18/3868C08G18/3887C08G18/4804C08G18/4854C08G18/61C08G18/6685C09J175/08
Inventor 陈汉佳周新婷石旭华
Owner SHANTOU UNIV
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