Combined polyol for polyisocyanurate foam

A technology of polyisocyanurate and combining polyols, applied in the field of polyols, can solve the problems of increased smoke, accompanied by toxic and irritating gases, etc., and achieve the effects of low smoke generation and good compressive strength

Inactive Publication Date: 2005-06-01
COVESTRO DEUTSCHLAND AG
View PDF0 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the foam containing the above two types of flame retardants has obvious disadvantages, that is, once the foam is burned, the volatil

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

Example Embodiment

[0018] Four specific embodiments are provided in combination with the contents of the present invention, but the present invention is not limited thereto. All fractions in the examples are by weight.

[0019] The raw material involved in the embodiment has:

[0020] 1. Combination polyol mixture:

[0021] Polyester polyol with a molecular weight of 300 obtained by polycondensation of phthalic anhydride and polyol; polypropylene oxide / epoxy polyether polyol with a molecular weight of 200 as an ethylenediamine initiator; containing active hydrogen atoms Compound: glycerin; Flame retardant: trichloropropyl phosphate (TCPP); Catalyst: metal potassium or sodium ion-containing weak organic acid salt / bis(dimethylaminoethyl) ether=(0~0.3) / ( 1-4); water; auxiliary materials and / or additives: foam stabilizers.

[0022] 2. Components that react with the above-mentioned combined polyol mixture: organic polyisocyanate and blowing agent.

[0023] The organic polyisocyanate is crude diph...

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

The polyol composition for polyisocyanurate foam consists of: polyester polyols based on aromatic acid anhydride 40-70 wt%; polyethylene/propylene oxide polyether polyols based on fatty amine, fatty diamine or fatty polyamine 0-10 wt%; compound containing active hydrogen atom 0-25 wt%, liquid organic fire retardant 14-25 wt%, water 1-3 wt%, catalyst 2-4.5 wt%, and supplementary material and/or additives 2-5 wt%. The hard foam prepared through one-step process has homogeneous and fine cells, and has the excellent performances in electric insulation, light weight, sound isolation, chemical corrosion resistance, etc. similar to those of PUR foam as well as pressure strength, size stability, heat insulation, flame resistance, low burning smoke amount, etc. superior to PUR foam. The present invention may be used in heat insulating material and sandwiched composite material with relatively high temperature requirement.

Description

technical field [0001] The invention relates to a polyol used in the field of foam materials, in particular to a combined polyol for polyisocyanurate foam plastics. Background technique [0002] Since the method of producing rigid polyurethane foam by reacting organic isocyanate with combined polyol in the presence of blowing agent was established, rigid polyurethane foam (PUR) has been widely used due to its low thermal conductivity, high specific strength, light weight and chemical corrosion resistance. It has received more and more applications and attention in the fields of construction, heat preservation, transportation, insulation and other materials. However, if ordinary PUR rigid foam is easily deformed and its compressive strength will decrease under high temperature or severe cold environment for a long time, the application range is limited. And as an organic polymer material, PUR rigid foam, like other organic substances, has the objective fact that it is easy t...

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): C08G18/48C08G18/70C08G63/66
Inventor 张杰陆伟唐伟源
Owner COVESTRO DEUTSCHLAND AG
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