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Modified polyurethane and preparation method and application thereof

A polyurethane and polyurethane coating technology, applied in the field of adhesive materials, can solve the problems of polyurethane coating surface pulverization, poor aging resistance, low strength, etc., to ensure elongation at break, increase tensile strength, and improve aging resistance Effect

Active Publication Date: 2021-11-30
广州凌天体育产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of the national economic level, people pay more and more attention to sports and health. Sports floor materials have a broad space for development. Common sports floor materials are prepared from organosilicon-modified polyurethane materials. Permanent polyurethane is usually prepared by grafting modification with silane coupling agent or nano-silica modification. It has good aging resistance and is environmentally friendly, but the strength of the prepared silicone-modified polyurethane sports floor material is relatively low. Low
And because sports floor materials often need to be constructed outdoors, the weather is changeable, and they are often exposed to the sun for a long time, which will easily lead to pulverization of the surface of the polyurethane coating, easy delamination, and poor aging resistance

Method used

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  • Modified polyurethane and preparation method and application thereof
  • Modified polyurethane and preparation method and application thereof

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preparation example Construction

[0029] An embodiment of the present invention provides a method for preparing modified polyurethane, which includes the following steps S110-S130.

[0030] S110: In parts by mass, 10 parts of pentaerythritol triacrylate and 30-70 parts of polydimethylmethylhydrogensiloxane are mixed, heated and reacted under catalytic conditions, and reaction products are separated to prepare hydroxyl-containing silicone oil.

[0031] Further, in parts by mass, 10 parts of pentaerythritol triacrylate and 40-60 parts of polydimethylmethylhydrogensiloxane are mixed, heated and reacted under catalytic conditions, and reaction products are separated to prepare hydroxyl-containing silicone oil. Pentaerythritol triacrylate and polydimethylmethylhydrogensiloxane can be fully added to form a specific multi-branched siloxane structure.

[0032] Further, the hydrogen content of polydimethylmethylhydrogensiloxane is 0.5%-2%. Furthermore, the hydrogen content of polydimethylmethylhydrogensiloxane is 0.8%...

Embodiment 1

[0059] (1) Preparation of hydroxyl-containing silicone oil:

[0060] In terms of parts by mass, first add 10 parts of pentaerythritol triacrylate and 60 parts of polydimethylmethylhydrogensiloxane (hydrogen content 0.95%-1.05%) to the reactor under stirring conditions, and then add 0.2 Parts of chloroplatinic acid, heated to 80 ° C for 8 hours. After the reaction was completed, the temperature was raised to 120° C., and the reaction product was separated by vacuum distillation for 30 minutes under a negative pressure of 0.095 MPa to obtain a hydroxyl-containing silicone oil.

[0061] (2) Preparation of modified polyurethane:

[0062] In terms of parts by mass, add 100 parts of polyoxypropylene diol (Mn=2000g / mol) to the reactor, raise the temperature to 100°C, dehydrate for 2 hours under the condition of negative pressure 0.095MPa, add 40 parts of 4,4'-diol Phenylmethane diisocyanate (pure MDI), reacted at 80°C for 2 hours, lowered to 70°C, added 4 parts of trimethylolpropan...

Embodiment 2

[0068] (1) Preparation of hydroxyl-containing silicone oil:

[0069] In terms of parts by mass, first add 10 parts of pentaerythritol triacrylate and 40 parts of polydimethylmethylhydrogensiloxane (hydrogen content 0.95%-1.05%) to the reactor under stirring conditions, and then add 0.2 Parts of chloroplatinic acid, heated to 70 ° C for 7 hours. After the reaction was completed, the temperature was raised to 120° C., and the reaction product was separated by vacuum distillation for 30 minutes under a negative pressure of 0.095 MPa to obtain a hydroxyl-containing silicone oil.

[0070] (2) Preparation of modified polyurethane:

[0071] In terms of parts by mass, add 100 parts of polyoxypropylene diol (Mn=2000g / mol) to the reactor, raise the temperature to 100°C, dehydrate for 2 hours under the condition of negative pressure 0.095MPa, add 55 parts of 4,4'-diol Phenylmethane diisocyanate (pure MDI), reacted at 85°C for 2 hours, lowered to 65°C, added 5 parts of trimethylolpropan...

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Abstract

The invention relates to a preparation method of modified polyurethane, the method comprises the following steps: mixing 10 parts by mass of pentaerythritol triacrylate and 30-70 parts by mass of polydimethylmethylhydrosiloxane, carrying out heating reaction under catalytic conditions, and separating the reaction product to prepare hydroxyl-containing organic silicone oil; heating and dehydrating 100 parts by mass of polyether glycol to prepare anhydrous polyether glycol; sequentially adding 30-60 parts by mass of aromatic diisocyanate, 2-10 parts by mass of trimethylolpropane and 20-65 parts by mass of hydroxyl-containing organic silicone oil into anhydrous polyether glycol, and reacting to prepare the modified polyurethane, thereby enhancing the strength and aging resistance of the modified polyurethane and reducing the surface pulverization.

Description

technical field [0001] The invention relates to the field of adhesive materials, in particular to a modified polyurethane and its preparation method and application. Background technique [0002] With the continuous improvement of the national economic level, people pay more and more attention to sports and health. Sports floor materials have a broad space for development. Common sports floor materials are prepared from organosilicon-modified polyurethane materials. Permanent polyurethane is usually prepared by grafting modification with silane coupling agent or nano-silica modification. It has good aging resistance and is environmentally friendly, but the strength of the prepared silicone-modified polyurethane sports floor material is relatively low. Low. And because sports floor materials often need to be constructed outdoors, the weather is changeable, and they are often exposed to the sun for a long time, which will easily lead to pulverization of the surface of the pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/61C08G18/32C09D175/04E01C13/06
CPCC08G18/12C08G18/6677C08G18/4825C08G18/4009C08G18/3206C09D175/04E01C13/065C08G2150/00C08G18/61
Inventor 温杰森
Owner 广州凌天体育产业有限公司
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