Unlock instant, AI-driven research and patent intelligence for your innovation.

Flexible polyurethane foam

A foam and polyurethane technology, applied in the field of flexible polyurethane foam, can solve the problems of insufficient load characteristics of flexible polyurethane foam, hysteresis of foam properties, deterioration of relative compression set characteristics, and low density

Inactive Publication Date: 2006-08-16
HUNTSMAN INT LLC
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore it is often not possible to get the density as low as expected
[0005] Another disadvantage is the deterioration of foam properties such as hysteresis and relative compression set properties at high stoichiometric water contents
[0006] In addition, the flexible polyurethane foams thus produced often do not have sufficient load-bearing properties

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flexible polyurethane foam
  • Flexible polyurethane foam
  • Flexible polyurethane foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Prepare a kind of polyisocyanate composition with following method: the MDI (containing 50 weight % 4,4 '-MDI and 50 weight % 2,4'+2,2 '-MDI) of 84.3 weight parts with 15.7 weight parts (pbw ) of polymeric MDI (NCO value 30.7% by weight and containing 35.4 pbw of 4,4`-MDI, 2.3 pbw of 2,4`+2,2`-MDI and 62.3 pbw of isocyanate functionality of 3 or higher homologues) mix.

[0065] A polyol composition was prepared as follows: 36.2 pbw of Arcol 1374, 9.4 pbw of Daltocel F526, 2.9 pbw of water, 0.24 pbw of EPk-38-1, a surfactant from Goldschmidt, 0.34 pbw of A mixture of Irganox 1135 and Irgafos TNPP (50 / 50, w / w) (both antioxidants ex Ciba) was mixed.

[0066] Measurement methods

Embodiment 2

[0069] First, the difference in particle size is significant (compare figure 1 , 3 and 5). exist figure 1 Large particles with sharp boundaries can be seen in ; in image 3 The middle particles are very small and in Figure 5 The middle boundary is not so sharp, and the PHD material seems to form aggregates without clearly defined boundaries.

[0070] Secondly, figure 1 and 2 Good representation of broken particles at the fracture surface of the foam struts. Figure 3-6 Shows no breakage of the particulate material.

Embodiment 3

[0072] In an open 101 bucket mix the following: 58 pbw of Daltocel F428, 30 pbw of polyol X, 12 pbw of Daltocel F526, 7 pbw of water, 1.2 pbw of B4113 (a surfactant from Goldschmidt), 0.6 pbw of D8154 ( an amine catalyst from Airproducts), 0.1 pbw of Niax Al (a catalyst from Union Carbide) and 0.3 pbw of D33 LV (a catalyst from Airproducts). To this was added 110 pbw of the 4:1 by weight mixture of MDI and polymeric MDI used in Example 1. The index is 100. The mixture was allowed to react. A flexible foam containing open cells is obtained with a free rise density of 19kg / m 3 .

[0073] Polyol X is a polyoxyethylene polyoxypropylene polyol having a nominal functionality of 3, an average equivalent weight of approximately 2000, an EO content of 28 wt. %, an EO end-capped content of 15 wt. %, and the remainder of EO with random distribution of PO; primary hydroxyl content about 85% and monohydroxyl (momool) content about 12 mole%.

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to flexible polyurethane foam, which contains an in-situ-formed granular material containing urea and ethyl carbamate groups or contains a granular material, wherein the granular material may be ruptured when tearing the foam. The foam renders excellent recovery characteristics such as compression set characteristics.

Description

[0001] This application is a divisional application of the parent application with application number 200410088069.0. The filing date of the parent case is July 5, 2001; the invention name is "flexible polyurethane foam". technical field [0002] The invention relates to a preparation method of flexible polyurethane foam and flexible polyurethane foam. Background technique [0003] Processes for preparing flexible polyurethane foams by reacting polyisocyanates, one or more polyether polyols, and water have been extensively described. [0004] One of the disadvantages in the prior art is that the bubble blowing efficiency is not optimal. This means that either part of the water used has not reacted with the polyisocyanate and thus has no CO 2 release, or premature release of CO 2 A reaction mixture was left without effectively expanding the foam. Therefore it is often not possible to get the density as low as expected. [0005] Another disadvantage is the deterioration o...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/40C08G18/72C08G101/00C08G18/75C08G18/48
CPCC08G18/4812C08G18/409C08G18/4837C08G18/06
Inventor W·A·多恩克J·-W·莱恩斯拉H·G·G·维尔贝克
Owner HUNTSMAN INT LLC