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polyurethane foam system

A polyurethane and foam technology, which is applied in the field of in-situ foaming polyurethane foam systems, can solve the problems of reduced emission behavior, a large number of catalysts, and foam products that do not show processing characteristics, and achieves good fluidity, low sporadic effect

Active Publication Date: 2022-06-07
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Some of the disadvantages encountered using the above known foam systems include, for example, that the resulting foam products produced with the known systems do not exhibit favorable processing characteristics, such as fast reactivity and fast demoulding, while still maintaining reduced emission behavior
In addition, the use of lower emissive catalysts in foam systems to prepare "in-situ fast-response and fast-release foam polyurethane foams" is challenging as compared to other polyurethane foams used in other applications systems, such foam systems require the use of large amounts of catalyst

Method used

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Examples

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preparation example Construction

[0056] Of particular importance for the preparation of flexible foams are the reaction products of alkylene oxides (eg ethylene oxide and / or propylene oxide) with initiators containing 2 to 8, preferably 3 to 8 active hydrogen atoms per molecule . Suitable initiators include: polyols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, glycerol, trimethylolpropane, triethanolamine, pentaerythritol and sorbitol; polyamines such as ethylenediamine , toluenediamine, diaminodiphenylmethane, and polymethylene polyphenylene polyamine; and amino alcohols, such as ethanolamine and diethanolamine; and mixtures of such initiators. Other suitable polyols include polyesters obtained by condensation of appropriate proportions of diols and higher functionality polyols with polycarboxylic acids. Still further suitable polyols include hydroxyl terminated polysulfides, polyamides, polyesteramides, polycarbonates, polyacetals, polyolefins, polysilo...

example

[0098] The following examples are presented to illustrate the invention in further detail, but are not to be construed as limiting the scope of the claims. All parts and percentages are by weight unless otherwise indicated.

[0099] Various terms and names used in the examples are explained herein below.

[0100] VOC stands for Volatile Organic Compounds.

[0101] SPECFLEX*NC 138 is a glycerol initiated polyoxyethylene terminated polyoxypropylene polyol having an equivalent weight of about 2040, a nominal functionality of about 3.0, a percent polyoxyethylene end cap of about 15% and a hydroxyl number of about 28 ; and available from The Dow Chemical Company.

[0102] SPECFLEX NC 701 is a grafted polyether polyol containing copolymerized styrene and acrylonitrile with an OH number of 19 to 25 mg KOH / g; and is commercially available from The Dow Chemical Company.

[0103] SPECFLEX ACTIV 2306 is an amine-initiated autocatalytic polyether polyol having a nominal functionality o...

example 1- example 4 and comparative example A

[0118] The examples described in Table I include formulated polyol blends reacted with MDI. The MDI had the isocyanate content as described in Table I. The polyol blend (B-side material) was mixed with polymeric MDI (A-side material) in a polyurethane dispenser. Such dispensing machines are commercially available, eg standard machines from equipment suppliers such as Henneke, KraussMaffei and Cannon. In the examples prepared as described in Table 1, the formulations were subjected to the following processing conditions:

[0119] The dispenser is capable of mixing a given foam-forming system at a given isocyanate to polyol ratio. Ratio is controlled by pump / motor size. The dispensing temperature of the material is typically in the range of about 15°C to about 50°C. In the examples, the temperature of polymer T(poly) is 20°C; and the temperature of isocyanate T(iso) is 20°C.

[0120] The dispensing pressure at a material temperature of 20°C is typically in the range of abou...

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Abstract

A reactive polyurethane foam-forming composition comprising: (I) an isocyanate-containing material; and (II) a polyol-containing blend of: (a) at least one autocatalytic polyol; ( b) at least one graft polyol; (c) at least one reactive polyether polyol; (d) at least one reactive catalyst; (e) at least one surfactant; and (f) water; and A process for preparing the foam-forming composition described above.

Description

[0001] Related applications [0002] This application claims the benefit of US Provisional Application No. 62 / 584,167, filed November 10, 2017. technical field [0003] The present invention relates to a foam-in-place polyurethane foam system and a method of making foam from such a system. Background technique [0004] Flexible polyurethane foam is a recognized commercial article; and various polyurethane foam systems are known for producing flexible polyurethane foam for a wide variety of commercial applications, such as in cushioning, seating , bedding, furniture, transport upholstery, carpet backing and packaging applications. Generally, reaction mixtures of polyols, polyisocyanates, catalysts, and / or other additives are used to prepare foam-forming polyurethane reaction mixture compositions, which in turn can be used to create flexible polyurethane foams. However, there is a huge difference in the compositional characteristics of the isocyanate compound and the hydrox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/50C08G18/63C08G18/65C08G18/66C08G18/76C08G18/28C08G18/32C08J9/00C08J9/08C08G18/30C08G101/00
CPCC08G18/485C08G18/5021C08G18/632C08G18/657C08G18/6688C08G18/7664C08G18/2865C08G18/302C08G18/3275C08G18/4816C08G18/482C08G2350/00C08G2110/005C08G2110/0008C08G2110/0058C08G18/2027
Inventor S·C·E·格拉西妮A·J·伯奇K·奥斯瓦德
Owner DOW GLOBAL TECH LLC
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