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Polyol composition containing fine particles dispersed therein, process for production of polymeric polyols, and process for production of polyurethane resins

A technology of polyol composition and manufacturing method, which is applied in the field of polyurethane resin manufacturing, can solve the problems of polymer polyol with high viscosity, uneconomical, expensive raw materials, etc., and achieve excellent mechanical strength, sufficiently small particle size, and narrow particle size distribution Effect

Inactive Publication Date: 2008-07-09
SANYO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, when the polymer polyols obtained by the methods of the above-mentioned Patent Documents 1 to 3 are used, there are problems in that scorching occurs in slab foam applications, and the obtained polyurethane foam has a lower elongation at break especially when the polymer content is increased. The mechanical strength represented by the length is insufficient, or it is uneconomical due to the use of relatively expensive raw materials
In addition, the method of Patent Document 4 has the problem that in order to obtain a small particle size, a large amount of high molecular weight polyols obtained by linking isocyanate polyols called bonded polyols are used as polyols serving as polymerization sites. polyol, so the viscosity of the polymer polyol is high, and the elongation at break of the resulting polyurethane foam becomes insufficient

Method used

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  • Polyol composition containing fine particles dispersed therein, process for production of polymeric polyols, and process for production of polyurethane resins
  • Polyol composition containing fine particles dispersed therein, process for production of polymeric polyols, and process for production of polyurethane resins
  • Polyol composition containing fine particles dispersed therein, process for production of polymeric polyols, and process for production of polyurethane resins

Examples

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Embodiment

[0149] Hereafter, although an Example demonstrates this invention more concretely, this invention is not limited to this. Hereinafter, %, parts and ratio represent mass %, parts by mass and ratio by mass, respectively, unless otherwise specified.

[0150] The compositions, symbols, and the like of raw materials used in Examples and Comparative Examples are as follows.

[0151] (1) Polyol (a1)

[0152] Polyol (a1-1): Polyol obtained by adding glycerol in the order of PO-EO-PO, hydroxyl value = 56, internal EO unit content = 9%

[0153] Polyol (a1-2): Polyol obtained by adding to pentaerythritol in the order of PO-EO, hydroxyl value = 32, terminal EO unit content = 14%

[0154] (2) Dispersant (e)

[0155] e-1: Hydroxyl value = 20 obtained by linking 0.14 mol of polyol (a1-2) and 0.07 mol of 2-hydroxyethyl methacrylate via 0.16 mol of TDI, number of unsaturated groups / number of nitrogen-containing groups = 0.22 reactive dispersant [refer to US Patent No. 6,756,414 (correspond...

manufacture example -1

[0166] Production of Polymer Polyol Precursor (m1)

[0167] In a water-cooled jacketed pressure-resistant reaction vessel, add polyol (a1-1): 73 parts, acrylonitrile: 4.7 parts, styrene: 11 parts, allyl alcohol PO 2.2 mole adduct (the number average molecular weight is 186 ): 1 part, divinylbenzene: 0.05 parts, dispersant (e-1): 1.6 parts, xylene: 4.8 parts, and the temperature was adjusted to 107° C. under stirring. Radical polymerization initiator (k-1): 0.09 part, (k-2): 0.07 part was melt|dissolved in 3.2 parts of xylenes, and it press-injected into the said reaction container. After the initiator was charged, the polymerization started rapidly within 1 minute, and reached the maximum temperature of 160° C. in about 6 minutes. The polymer polyol precursor (m1) was obtained by aging at 140° C. for 30 minutes while removing the heat of polymerization. The conversion rate and the conversion rate were 78% and 13% by mass / min, respectively.

manufacture example -2

[0168] Production of polymer polyol precursor (m2)

[0169] Add polymer polyol precursor (m1): 100 parts, polyol (a1-1): 33 parts, acrylonitrile: 14 parts, styrene: 33 parts, allyl in a water-cooled jacketed pressure-resistant reaction vessel Alcohol PO 2.2 mole adduct: 3.3 parts, divinylbenzene: 0.14 parts, dispersant (e-1): 4.7 parts, xylene: 4.8 parts, and temperature was adjusted to 107° C. under stirring. Radical polymerization initiators (k-1): 0.24 parts and (k-2): 0.28 parts were dissolved in 3.2 parts of xylene, and then press-injected into the reaction container. After the initiator was charged, the polymerization started rapidly within 1 minute, and reached the maximum temperature of 160° C. in about 6 minutes. The polymer polyol precursor (m2) was obtained by aging at 140° C. for 30 minutes while removing the heat of polymerization. The conversion rate and the conversion rate were 84% and 14% by mass / min, respectively.

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Abstract

The present invention provides a polyol composition obtained by dispersing the following resin fine particles (b) in a polyol (a) and a method for producing the same. The resin fine particles (b) are particles having an arithmetic standard deviation of 0.6 or less based on the volume standard of the particle size distribution when the range of 0.020 to 2000 μm is divided into 85 parts measured by a laser diffraction / scattering particle size distribution analyzer. The present invention provides a resin microparticle-dispersed polyol composition capable of producing a polyurethane resin excellent in mechanical strength such as elongation at break even if the particle size of resin particles dispersed in polyol is small, and a method for producing the same.

Description

technical field [0001] The present invention relates to a resin microparticle-dispersed polyol composition and a method for producing the same. More specifically, the present invention relates to a polyol composition suitable as a raw material for polyurethane resins such as polyurethane foams and polyurethane elastomers, a method for producing a polymer polyol, and a method for producing polyurethane resins. Background technique [0002] Polymer polyols are used as raw materials for polyurethane resins to improve physical properties such as compression hardness and durability of polyurethane foams, and are obtained by polymerizing ethylenically unsaturated monomers in polyols in the presence of a polymerization initiator. In recent years, polymer polyols with small average particle diameters have been expected to further improve compression hardness and elongation at break. It is known to increase the proportion of acrylonitrile used as part of the ethylenically unsaturate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/02C08L101/00C08F2/18C08G18/00C08G101/00
CPCC08G18/0876C08L71/02
Inventor 中田繁邦渡部弘之辻隆之森洋毅
Owner SANYO CHEM IND LTD
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