Modified polyurethane composition and preparation thereof

A technology of composition and polyurethane, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problem that the mechanical strength and dielectric strength of the product cannot fully reach the best state, poor electrical insulation performance, and low dielectric strength and other issues, to achieve the effect of wide source of raw materials, improved flame retardancy, and high dielectric strength

Inactive Publication Date: 2006-03-15
SHANXI NUOBANG POLYURETHANE
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention overcomes the shortcomings of the existing "one-step" production, and has the advantages of short curing time and long storage time, but has low dielectric strength and no flame retardancy, so it is only suitable for insulation and potting of wires and cables below 35KV; The announcement number is 1232850, and the Chinese patent titled "Special Adhesive for Polyurethane Cable Shielding Composite Tape and Manufacturing Method" has the advantages of oil resistance, water resistance, high temperature resistance, and strong adhesion, but poor electrical insulation performance and no flame retardancy The inventor has obtained a Chinese patent with t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0013] First, 150 grams of propylene oxide homopolyether-2000; 8 grams of ethylenediamine polyether-403; 80 grams of castor oil are added in a 500ml reaction kettle equipped with a stirrer, a temperature controller and a water cooler, and heated Stir to heat up and start vacuuming. When the temperature rises to 140-150°C, keep the vacuum degree greater than 700mmHg, continue vacuuming for 2.0-3.0 hours, and then cool to room temperature; add 60 grams of trichloroethylene; toluene diisocyanate (TDI- 80) 90 g; Stir and heat up to 60°C-80°C, react at constant temperature for 2.0-3.0 hours and cool down to obtain component A, which is sealed and stored.

[0014] Secondly, in a 500ml reactor equipped with a stirrer, a temperature controller and a water cooler, add 140 grams of 3,3'-dichloro-4,4'diphenyldiaminomethane; Then add 340 grams of tetrahydrofuran to dissolve it, add 20 grams of hard coal tar pitch, stir and dissolve, then take 80 grams of dimethyl methylphosphonate; for di...

specific Embodiment approach 2

[0016] According to the method of specific embodiment 1, propylene oxide homopolyether-2000 140 grams in A component; Ethylenediamine polyether-403 6 grams; Castor oil 70 grams; Trichlorethylene 50 grams; Toluene diisocyanate (TDI-80) 80 grams; 130 grams of 3,3-dichloro-4,4'diphenyldiaminomethane in component B; 80 grams of dimethyl methylphosphonate; 7 grams of adipic acid; 40 grams of modified resin additives; 300 grams of tetrahydrofuran; 10 grams of hard coal tar pitch to obtain high dielectric strength polyurethane resin products.

specific Embodiment approach 3

[0017] According to the method of Embodiment 1, 160 grams of polyether-2000 in component A; 10 grams of amine ether-403; 90 grams of castor oil, 70 grams of trichlorethylene; 100 grams of toluene diisocyanate (TDI-80) 150 grams of 3,3'-dichloro-4,4'diphenyldiaminomethane in component B; 100 grams of dimethyl methylphosphonate; 10 grams of adipic acid; 640 grams of resin additives , 400 grams of tetrahydrofuran, and 30 grams of hard coal pitch to obtain high dielectric strength polyurethane resin composition products.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A modified polyurethane composition and its production are disclosed. The process is carried out by taking propylene epoxide s-polyether, castor oil and toluene diisocyanate as raw materials, adding into ethylenediamine polyether, synthesizing A component, accelerating curing time after mixing A with B components, taking 3,-dichloride-4,4,diphenyl bisamine methane as raw materials, adding into vinyl chloride-vinyl acetate copolymer and dimethyl ester methyl phosphonate and producing B component from coal tar pitch. It achieves low cost, simple process, to increase tensile strength, dielectric strength, fire and water resistances of polyaminoresin. It can be used for various coating materials of cable, protective cover of wire and electronic components.

Description

technical field [0001] The invention relates to a polyurethane composition, in particular to a modified polyurethane composition used for wire and cable covering materials and potting and repairing and a preparation method thereof. Background technique [0002] At home and abroad, tetrahydrofuran homopolyether polyurethane is used in the laying of transoceanic submarine cables. It has the advantages of high strength, voltage resistance, and extreme seabed conditions. However, these materials require thermoplastic molding, which is costly and inconvenient to use. In terms of the selection of composite insulating materials, predecessors have tried many methods. For example, the mixing of polyurethane and polycarbonate under melting conditions, the blending of polyether polyurethane and chlorinated polyethylene, the blending of tertiary amine-containing polyurethane and polyvinyl chloride block, etc., have achieved relatively good results in hydrolysis resistance and voltage re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L75/08C08J3/24C08L95/00
Inventor 李万捷赵亮张腊王志忠
Owner SHANXI NUOBANG POLYURETHANE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap