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flexible foam

A soft foam and mass ratio technology, applied in the field of preparing soft foam compositions, can solve problems such as poor hand feel of polyurethane foam, and achieve the effects of adjustable hand feel, adjustable hardness and high resilience

Active Publication Date: 2022-07-15
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyurethane foam that this method obtains feels bad

Method used

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Embodiment

[0153] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. When the definitions of terms in this specification conflict with the meanings commonly understood by those skilled in the art to which the invention belongs, the definitions set forth herein shall prevail.

[0154] All numerical values ​​used in the specification and claims to express amounts of ingredients, reaction conditions, etc. are understood to be modified by the term "about" unless otherwise indicated. Accordingly, unless indicated to the contrary, the numerical parameters set forth herein are approximations that can vary depending upon the desired properties sought to be obtained.

[0155] As used herein, "and / or" refers to one or all of the referred elements.

[0156] As used herein, "comprising" and "comprising" encompass only the recited element as well as instances where th...

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Abstract

The present invention relates to a composition for preparing flexible foam and its application. The composition comprises the following components: a. an isocyanate mixture comprising: a1) an aliphatic and / or cycloaliphatic isocyanate monomer, and a2) an aliphatic and / or cycloaliphatic isocyanate trimer, wherein the The mass ratio of the monomer and trimer is 3: 1-200: 1; b. a polymer polyol mixture, comprising: b1) a first polyether polyol, the number average molecular weight is not less than 3000g / mol, cyclic The ethylene oxide content is 5-20% by weight, b2) a second polyether polyol, the number average molecular weight is not less than 3000g / mol, and the ethylene oxide content is greater than 60% by weight, wherein the first polyether polyol and the second polyether polyol are The mass ratio of the dimer ether polyol is 4:1-100:1; c. a compound containing an isocyanate-reactive group with a number-average molecular weight of 32-400 g / mol; d. a catalyst; e. a blowing agent and f. an optional additive; wherein the isocyanate index of the composition is 70-120.

Description

technical field [0001] The present invention relates to a composition for preparing flexible foam and its application. Background technique [0002] Flexible foams, especially flexible polyurethane foams, are often used in textiles and other fields. Flexible polyurethane foams are often prepared by reacting isocyanates with isocyanate-reactive compounds containing at least two active hydrogen atoms in the presence of blowing agents, catalysts, silicone-based surfactants and other additives. The reactive compounds are typically polyols, polyprimary amines, secondary amines and water. [0003] Aromatic isocyanates such as toluene diisocyanate (TDI) or diphenylmethane diisocyanate (MDI) are widely used in the preparation of flexible and rigid polyurethane foams due to their high reactivity. US 4,250,137 discloses a method of heating an aromatic flexible polyurethane foam above its glass transition temperature (Tg) using a high temperature mold of 176-204°C and pressing, cooli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/79C08G18/66C08G18/48C08G18/32C08G101/00
CPCC08G18/755C08G18/758C08G18/792C08G18/725C08G18/6677C08G18/6688C08G2110/0008
Inventor 赵东波伍维成邓妍唐敏李立强
Owner COVESTRO DEUTSCHLAND AG