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Preparation method of anti-yellowing polyurethane artificial flower

A technology of polyurethane and artificial flowers, applied in the field of polyurethane artificial flowers, to achieve strong yellowing resistance, improve tensile strength and impact strength, and improve hydrophobicity

Inactive Publication Date: 2020-01-21
界首市希捷仿真花卉有限公司
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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 provide a method for preparing yellowing-resistant polyurethane artificial flowers to solve the problem that the water resistance and yellowing resistance of existing polyurethane artificial flowers need to be further improved

Method used

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  • Preparation method of anti-yellowing polyurethane artificial flower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of anti-yellowing polyurethane artificial flowers, comprising the following contents:

[0021] (1) Raw material preparation

[0022] The raw material components of the component A include, in parts by weight, 78 parts of composite polyester polyols containing benzene rings, 4.5 parts of white masterbatch, 0.9 parts of water, 3.5 parts of German BASF chain extender ADR-4368CS, organic bismuth 1.5 parts of catalyst, 0.5 part of 2-hydroxyl-4-dodecyloxybenzophenone;

[0023] The polyester polyol containing benzene ring is obtained by mixing PD-56LV and PS-2412 in a weight ratio of 1:1; the organic bismuth catalyst is bismuth neodecanoate;

[0024] The component B is obtained by mixing dicyclohexylmethane diisocyanate and hydrogenated xylylene diisocyanate with an NCO content of 34.2-36.8% in a weight ratio of 14:1;

[0025] (2) Dehydrate the composite polyester polyol containing benzene rings under a vacuum of 0.12kPa until the water content is lower ...

Embodiment 2

[0028] A preparation method of anti-yellowing polyurethane artificial flowers, comprising the following contents:

[0029] (1) Raw material preparation

[0030] The raw material components of the component A include, in parts by weight, 75 parts of composite polyester polyols containing benzene rings, 3 parts of white masterbatch, 0.6 parts of water, 4 parts of German BASF chain extender ADR-4368CS, organic bismuth 1.8 parts of catalyst, 0.4 part of 2-hydroxyl-4-dodecyloxybenzophenone;

[0031] The polyester polyol containing benzene ring is obtained by mixing PD-70LV and PS-2502A at a weight ratio of 1:1; the organic bismuth catalyst is mixed with bismuth laurate and bismuth isooctanoate at a weight ratio of 3:1;

[0032] The component B is obtained by mixing dicyclohexylmethane diisocyanate and hydrogenated xylylene diisocyanate with an NCO content of 34.2-36.8% in a weight ratio of 16:1;

[0033] (2) Dehydrate the composite polyester polyol containing benzene rings under ...

Embodiment 3

[0036] A preparation method of anti-yellowing polyurethane artificial flowers, comprising the following contents:

[0037] (1) Raw material preparation

[0038] The raw material components of the component A include, in parts by weight, 80 parts of composite polyester polyols containing benzene rings, 6 parts of white masterbatch, 1.2 parts of water, 3 parts of German BASF chain extender ADR-4368CS, organic bismuth 1.2 parts of catalyst, 0.6 part of 2-hydroxyl-4-dodecyloxybenzophenone;

[0039] The polyester polyol containing benzene ring is obtained by mixing PHN-56 and PS-2412 in a weight ratio of 1:1; the organic bismuth catalyst is obtained by mixing bismuth neodecanoate and bismuth isooctanoate in a weight ratio of 2:1;

[0040] The component B is obtained by mixing dicyclohexylmethane diisocyanate and hydrogenated xylylene diisocyanate with an NCO content of 34.2-36.8% in a weight ratio of 12:1;

[0041](2) Dehydrate the composite polyester polyol containing benzene ri...

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Abstract

The invention belongs to the technical field of polyurethane artificial flowers and particularly relates to a preparation method of anti-yellowing polyurethane artificial flowers. The preparation method comprises the following steps: stirring and mixing a component B and a component A according to an isocyanate index of 1.3 at the temperature of 75-80 DEG C, pouring the mixture into a preheated mold, demolding the shaped flowers after 12-15 minutes, and performing standing treatment for 7 days after demolding, thereby obtaining the yellowing-resistant polyurethane artificial flower. Compared with the prior art, the method is simple; by reasonably selecting an isocyanate raw material and a polyol raw material, reasonably controlling the isocyanate index and increasing free-NCO groups underthe condition of ensuring the mechanical strength, urea bonds are generated by cross-linking with water in the reaction process, so that the content of the urea bonds in chain segments is increased, and then the hydrophobicity of the composite material is improved; in addition, the benzene ring-containing polyester polyol is reasonably compounded, so that the mechanical properties of polyurethanecan be ensured, the influence of moisture in air on the prepared simulation flower is avoided, and the yellowing resistance is high.

Description

technical field [0001] The invention belongs to the technical field of polyurethane artificial flowers, and in particular relates to a method for preparing yellowing-resistant polyurethane artificial flowers. Background technique [0002] In life, in order to beautify the living environment, people usually like to use plants to decorate their living space; and fresh plants, including flowers, trees and fruits, will become dry and lose their luster after a period of time due to the loss of water in the body And beautiful appearance, so artificial flowers gradually enter people's life; At present, people have carried out a lot of research on artificial flowers, the main requirements of artificial flowers in the process of use are as follows: easy to bend, have certain mechanical properties, , It will not be scratched or broken during the maintenance process; it is resistant to aging, and it will not turn yellow or crack under light and other natural conditions; in addition, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/42C08G18/22C08K5/132A41G1/00C08G101/00
CPCA41G1/001C08G18/227C08G18/4211C08G18/722C08G18/758C08K5/132C08G2110/0083
Inventor 张伟
Owner 界首市希捷仿真花卉有限公司
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