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Polyurethane resin for bonding layer and preparation method for polyurethane resin

A technology of polyurethane resin and bonding layer, applied in the field of polyurethane materials, can solve the problems of delamination and pulverization, rapid decline of bonding strength, insufficient bonding strength of polyurethane resin and cloth base, etc., and achieves high hydrolysis resistance, stable quality and improved, The effect of high peel strength retention

Inactive Publication Date: 2019-12-20
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, it is necessary for the present invention to provide a polyurethane resin for an adhesive layer and a preparation method thereof. In the preparation process, a phthalic acid-based polyester polyol is added, thereby solving the problem of the existing common adhesive layer polyurethane resin and cloth base. The bonding strength is not high enough. In the high temperature and high humidity environment, the bonding strength decreases rapidly, and there is a technical problem of delamination and pulverization.

Method used

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  • Polyurethane resin for bonding layer and preparation method for polyurethane resin
  • Polyurethane resin for bonding layer and preparation method for polyurethane resin
  • Polyurethane resin for bonding layer and preparation method for polyurethane resin

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Embodiment 1

[0035] The bonding layer in the present embodiment uses polyurethane resin, and raw material composition and addition are shown in the following table:

[0036] raw material name Weight (unit: g) 4,4′-Diphenylmethane diisocyanate (MDI) 378 Polyether polyol (PTMG-2) 420 Polyether polyol (PTMG-1) 280 Phthalate-based polyester diol (Amway SP-2260) 260 Antioxidant UHS-301 0.3 Organic Bismuth Catalyst (MB20) 0.1 N,N-Dimethylformamide (DMF) 3120

[0037] In the present embodiment, the preparation steps of the polyurethane resin for the bonding layer are as follows:

[0038] (1) respectively carry out dehydration treatment with phthalic acid series polyester diol, PTMG-1, PTMG-2;

[0039] (2) 1000g dimethylformamide, 0.3g antioxidant, 420g polyether polyol (PTMG-2), 280g polyether polyol (PTMG-1), 260g phthalic acid polyester diol Put it into the reaction kettle and mix evenly, then add organic bismuth catalyst and isocyanate ...

Embodiment 2

[0042] The bonding layer in the present embodiment uses polyurethane resin, and raw material composition and addition are shown in the following table:

[0043]

[0044]

[0045] In the present embodiment, the preparation steps of the polyurethane resin for the bonding layer are as follows:

[0046] (1) carrying out dehydration treatment with isophthalic acid series polyester glycol, PTMG-1, PTMG-2 respectively;

[0047] (2) 1000g dimethylformamide, 0.3g antioxidant, 420g polyether polyol (PTMG-2), 280g polyether polyol (PTMG-1), 250g isophthalic acid polyester diol Put it into the reaction kettle and mix evenly, then add organic bismuth catalyst and isocyanate accounting for 65% of the total isocyanate weight, and react at 70°C for 50 minutes;

[0048] (3) Add the remaining amount of isocyanate to the above mixture several times to carry out the viscosity-increasing reaction, react at 70°C for 40 minutes in each step, and have a total of 9 hours in the viscosity-increa...

Embodiment 3

[0050] The bonding layer in the present embodiment uses polyurethane resin, and raw material composition and addition are shown in the following table:

[0051] raw material name Weight (unit: g) 4,4′-Diphenylmethane diisocyanate (MDI) 423 Polyether polyol (PTMG-2) 520 Polyether polyol (PTMG-1) 280 Isophthalic acid polyester diol (Amway SP-2250) 280 Antioxidant UHS-301 0.3 Organic Bismuth Catalyst (MB20) 0.1 N,N-Dimethylformamide (DMF) 2800

[0052] In the present embodiment, the preparation steps of the polyurethane resin for the bonding layer are as follows:

[0053] (1) carrying out dehydration treatment with isophthalic acid series polyester glycol, PTMG-1, PTMG-2 respectively;

[0054] (2) 1000g dimethylformamide, 0.3g antioxidant, 520g polyether polyol (PTMG-2), 280g polyether polyol (PTMG-1), 280g isophthalic acid polyester diol Put it into the reaction kettle and mix evenly, then add organic bismuth catalyst and i...

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Abstract

The invention discloses polyurethane resin for a bonding layer and a preparation method for the polyurethane resin. The polyurethane resin is prepared from the ingredients in parts by weight: 7-11 parts of isocyanate, 15-22 parts of polymer polyol, 0-2 parts of micromolecular chain extender, 4-7 parts of phthalic acid polyester polyol, 0.00006-0.0001 part of antioxidant and 0.00002-0.00004 part ofcatalyst. By addition of the phthalic acid polyester polyol, the technical problems of the existing ordinary polyurethane resin for bonding layers that the strength of bonding between the polyurethane resin and a fabric base is not high enough, the loss of bonding strength is fast in high-temperature high-humidity environments, and delamination powdering is present are solved.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and in particular relates to a polyurethane resin for an adhesive layer and a preparation method thereof. Background technique [0002] Polyurethane Synthetic Leather belongs to the category of polyurethane elastomers. It has soft luster, natural, soft touch, and strong leather-like appearance. It has excellent adhesion to the substrate, wear resistance, flex resistance, and aging resistance. Excellent mechanical properties, but also has the advantages of good cold resistance, breathable, washable, convenient processing, low price, etc., is the most ideal substitute for natural leather. [0003] At present, due to the advantages of polyurethane synthetic leather, the market share is gradually expanding, and it is deeply loved by consumers in the fields of sports shoes, clothing, luggage, electronic packaging, etc., especially in the sofa furniture market. , coincides with high quality and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/42D06N3/14
CPCC08G18/4018C08G18/4211C08G18/4804D06N3/148D06N2209/1621D06N2209/1664D06N2211/28
Inventor 田海英武春余姚克俭王锐林黄万里
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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