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Dry bonding layer polyurethane resin for pasting double mirror and preparation method thereof

A technology of polyurethane resin and adhesive layer, which is applied in the field of dry adhesive layer polyurethane resin for affixing double mirrors and its preparation, which can solve the problems of unclear patterns, poor mirror surface transparency, bubbles at the bottom of pattern grooves, etc., and achieve pattern clarity The effect of improving and improving grades

Active Publication Date: 2012-05-16
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to prepare a dry-type adhesive layer polyurethane resin for double-mirror sticking to solve the problems of bubbles at the bottom of pattern grooves, unclear patterns, and poor mirror transparency in the production process of double-mirror synthetic leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] Raw material name Weight (unit: Kg)

[0032] PET-1 200

[0033] PET-2 700

[0034] 1,4-butanediol 110

[0035] 1,2-propanediol 20

[0036] 4,4-Diphenylmethane diisocyanate (MDI) 545

[0037] Antioxidant 1010 2.0

[0038] UV absorber UV-328 1.0

[0039] Catalyst MB20 0.2

[0040] N,N-Dimethylformamide (DMF) 3700

[0041] PET-1 is a polyester polyol with a molecular weight of 3000.

[0042] PET-2 is a polyester polyol with a molecular weight of 2000.

[0043] Prepare as follows:

[0044] 1. Put various polyol compounds, small molecule diol chain extenders, antioxidant 1010, N,N-dimethylformamide into the reaction kettle for stirring, after 10 to 20 minutes, put 4,4' -Diphenylmethane diisocyanate, control the temperature of the kettle at 70°C to 80°C, and react for more than 2 hours. The amount of diisocyanate added for the first time is 70% to 80% of the theoretical amount added.

[0045] 2. Add 4,4'-diphenylmethane diisocyanate for reaction: after 30 minutes ...

Embodiment approach 2

[0049] Raw material name Weight (unit: Kg)

[0050] PET-1 200

[0051] PET-2 700

[0052] Ethylene glycol 160

[0053] Neopentyl glycol 25

[0054] 4,4-Diphenylmethane diisocyanate (MDI) 545

[0055] Antioxidant 1010 2.0

[0056] UV absorber UV-328 1.0

[0057] Catalyst MB20 0.2

[0058] N,N-Dimethylformamide (DMF) 3815

[0059] PET-1 is a polyester polyol with a molecular weight of 3000.

[0060] PET-2 is a polyester polyol with a molecular weight of 2000.

[0061] Paste double mirror of the present invention and prepare according to the following steps with dry adhesive layer polyurethane resin:

[0062] 1. Put various polyol compounds, small molecule diol chain extenders, antioxidant 1010, and DMF into the reaction kettle, stir for 10-20 minutes, then put in MDI, control the temperature of the kettle at 70-80°C for more than 2 hours , the amount of diisocyanate added for the first time is 70% to 80% of the theoretical amount added.

[0063] 2. Add MDI and react f...

Embodiment approach 3

[0067] In order to verify the excellent performance of the dry bonding layer polyurethane resin of the present invention, the resin prepared by the above-mentioned embodiment is made into leather according to the following formula and the current normal process of dry veneering, and the specific formula is as follows:

[0068] Resin 100

[0069] DMF60

[0070] leveling agent 1

[0071] Stripping agent 0.5

[0072] After testing, the polyurethane synthetic leather made with the above-mentioned formula has no air bubbles at the bottom of double-mirror grooves with various large patterns, high pattern definition, good transparency, and excellent mirror effect.

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PUM

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Abstract

The invention discloses a dry bonding layer polyurethane resin for pasting double mirror and a preparation method thereof. The formula of the resin mainly comprises raw materials including diisocyanate, a polyalcohol compound, a chain extender, an antioxidant, a catalyst, an aid and a solvent, wherein the raw materials are mixed in a certain ratio to undergo chemical reactions under a set condition so as to generate the polyurethane resin which meets a requirement. The dry bonding layer polyurethane resin for pasting the double mirror produced by the preparation method of the invention has the advantages of fully solving the problem that air bubbles at the bottom of a leather groove of conventional large pattern-pasted double mirror cannot be eliminated fully, improving resin transparencyand pattern definition and greatly lifting the grade of a double mirror synthetic leather.

Description

technical field [0001] The invention relates to a polyurethane resin for a dry adhesive layer for adhering double mirrors and a preparation method thereof. Background technique [0002] Double-mirror synthetic leather is favored by the market for its unique pattern layering, bright mirror effect, and simple process conditions. However, at present, the air bubbles at the bottom of the pattern groove cannot be eliminated when many large patterns are attached to the double mirror, and the transparency of the mirror resin, especially the adhesive layer resin, is poor, which limits the application range of the double mirror and the grade is not high. Contents of the invention [0003] The purpose of the present invention is to prepare a dry-type adhesive layer polyurethane resin for double-mirror sticking to solve the problems of bubbles at the bottom of pattern grooves, unclear patterns, and poor mirror surface transparency that occur in the production process of double-mirror...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L75/06C08L75/08C08G18/66C09J175/06C09J175/08D06N3/14
Inventor 宗军业武春余惠坚强
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL