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Polyurethane foam system

A polyurethane foam, foam technology, applied in the field of low-emission polyurethane foam systems, can solve the problems of reducing emissions, foam products not showing processing characteristics, etc.

Active Publication Date: 2020-06-09
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Some of the disadvantages encountered using the known foam systems described above include, for example, that the resulting foam products made from such prior known systems do not exhibit favorable processing characteristics, such as fast reactivity, good flow and sufficient polyol system Stability while still maintaining reduced emissions, enabling the foam to pass the VDA278(2011) emissions test
In addition, the use of low emission catalysts in foam systems to produce "fast blowing / gravity-resistant polyurethane foam" is challenging due to the need to use large amounts of total catalyst

Method used

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Examples

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example

[0088] The following examples are presented to further illustrate the invention, but are not to be construed as limiting the scope of the claims. All parts and percentages are by weight unless otherwise indicated.

[0089] Various terms and designations used in the following examples are explained below.

[0090] DOWFAX 92N20 is a mixed oxide (PO / EO) polyether polyol with a nominal functionality of 2, a hydroxyl number between 26 and 29, and an EO content of 20 wt%. DOWFAX 92N20 is commercially available from The Dow Chemical Company.

[0091] VORANOL 3322 is a mixed oxide (PO / EO) polyether polyol having a nominal functionality of 3 and having a hydroxyl number between 46 and 50; and is commercially available from The Dow Chemical Company.

[0092] SPECFLEX ACTIV 2306 is an amine initiated autocatalytic polyether polyol having a nominal functionality of about 4 and a hydroxyl number between 31.0 and 40.0; and is commercially available from The Dow Chemical Company.

[0093]...

example 1 and comparative example A-E

[0104] The examples described in Table I contain formulated polyol blends reacted with MDI. MDI has an isocyanate content of about 31% by weight. The polyol blend (B side material) and polymeric MDI (A side material) were mixed in a polyurethane dispenser. This dispensing machine is a standard machine available on the market, eg from equipment suppliers such as Henneke, Krauss Maffei and Cannon. In the examples prepared as described in Table 1, Cannon AP10 dispensing equipment with a LN5 impact mix head was used; and the formulations were subjected to the following processing conditions:

[0105] The dispenser is capable of mixing a given foam forming system at a given ratio of isocyanate to polyol. The ratio is controlled by the size of the pump / motor. The dispensing temperature of the material is typically in the range of 20°C to 60°C. In the example, the temperature of the polymer T(poly) is 40°C; and the temperature of the isocyanate T(iso) is 40°C.

[0106] At a mate...

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Abstract

A polyurethane foam-forming reaction mixture composition including: (I) an organic isocyanate; and (II) an admixture of: (a) at least one autocatalytic polyol; (b) at least one ethylene oxide (EO)-capped polyol; (c) at least one reactive blowing catalyst; (d) at least one surfactant; and (e) water; and a polyurethane foam prepared from the above polyurethane foam-forming reaction mixture composition.

Description

[0001] References to related applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 584,164, filed November 10, 2017. technical field [0003] The present invention relates to a low emission polyurethane foam system and a method of making foam from such a system. Background technique [0004] Flexible polyurethane foam is a recognized article of commerce; and various polyurethane foam systems are known for the production of flexible polyurethane foam for a wide variety of commercial applications, such as in cushioning, seating, bedding, furniture, transportation upholstery, Carpet underlayment and packaging applications. Generally, a reaction mixture of polyol, polyisocyanate, catalyst, and / or other additives is used to prepare a foam-forming polyurethane reaction mixture composition, which can then be used to produce flexible polyurethane foam. However, the compositional characteristics of isocyanate compounds and hydroxyl compou...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/50C08G18/76C08G18/08C08G18/18C08G18/30C08G18/28C08J9/00C08J9/08C08G101/00
CPCC08G18/485C08G18/5021C08G18/7664C08J9/0042C08J9/08C08G18/14C08G18/1825C08G18/2865C08G18/302C08G18/4812C08G18/482C08G2350/00C08G2110/005C08G2110/0008C08G18/1833
Inventor K·奥斯瓦德A·J·伯奇S·C·E·格拉西妮
Owner DOW GLOBAL TECH LLC
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