Unlock instant, AI-driven research and patent intelligence for your innovation.

Multi-branched polyurethane associative thickening agent containing C=C double bond and preparation method thereof

An associative thickener, multi-branched technology, used in polyurea/polyurethane coatings, coatings, etc., can solve problems such as affecting the performance stability of UV cured films, rarely using water-based UV systems, and easy cross-linking. , to achieve the effect of excellent shear thinning effect and excellent thickening effect

Active Publication Date: 2018-04-13
优卡化学(上海)有限公司 +2
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] HEUR is generally a linear polyurethane chain. By introducing a branched structure, the association point can be increased, thereby improving the thickening efficiency. However, the currently introduced branched structure is easy to cross-link and has poor stability.
[0005] In addition, the currently commonly used HEUR cannot participate in the crosslinking reaction of water-based UV systems, which will affect the performance stability of UV-cured films, so it is rarely used in water-based UV systems.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-branched polyurethane associative thickening agent containing C=C double bond and preparation method thereof
  • Multi-branched polyurethane associative thickening agent containing C=C double bond and preparation method thereof
  • Multi-branched polyurethane associative thickening agent containing C=C double bond and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] A preparation method of a hyperbranched polyurethane associative thickener containing C=C double bonds, said preparation method comprising the following preparation steps:

[0036] Add branched polyethylene glycol into the reaction vessel, raise the temperature to 100-120°C, and vacuum dry and dehydrate for 1-3 hours;

[0037] Introduce nitrogen into the reaction vessel, lower the temperature to 60-80°C, add catalyst and diisocyanate, and keep the reaction for 2-5h;

[0038] Raise the temperature to 90-100°C, add enol capping agent, keep warm for 1-2 hours, pour it into the tetrafluoro template while it is hot, put it in a vacuum oven, and get the thickener product after cooling at room temperature.

[0039] The preparation method for preparing the hyperbranched polyurethane associative thickener containing C=C double bonds is easy to operate, and the hyperbranched polyurethane associative thickener containing C=C double bonds prepared by the above preparation method ha...

Embodiment 1

[0042] Raw material preparation: get 10 molar parts of branched polyethylene glycol (molecular weight 2000), 16.5 molar parts of toluene diisocyanate, 3 molar parts of capping agent undecylenol, and the mass fraction that accounts for total material is 0.05% catalyst two Dibutyltin laurate is reserved.

[0043] Preparation of hyperbranched polyurethane associative thickener containing C=C double bond:

[0044] (1) Add branched polyethylene glycol (molecular weight: 2000) into the reaction vessel, raise the temperature to 100° C., and vacuum-dry and dehydrate for 2 hours.

[0045] (2) Nitrogen gas was introduced into the reaction vessel, and the temperature was lowered to 60° C., the catalysts dibutyltin dilaurate and toluene diisocyanate were added, and the reaction was maintained for 3 hours.

[0046] (3) Heat up to 90°C, add undecylenol capping agent, keep warm for 2 hours, pour it into the tetrafluoro template while it is hot, put it in a vacuum oven, and get the thickener...

Embodiment 2

[0051] Raw material preparation: take 10 molar parts of branched polyethylene glycol (molecular weight 4000), 18.5 molar parts of hexamethylene diisocyanate, 5 molar parts of blocking agent undecylenol, and the mass fraction of the total material is 0.1% The catalyst dibutyltin dilaurate is spare.

[0052] Preparation of hyperbranched polyurethane associative thickener containing C=C double bond:

[0053] (1) Add branched polyethylene glycol (molecular weight: 4000) into the reaction vessel, raise the temperature to 110° C., and vacuum-dry and dehydrate for 3 hours.

[0054] (2) Nitrogen gas was introduced into the reaction vessel, and the temperature was lowered to 70° C., the catalysts dibutyltin dilaurate and hexamethylene diisocyanate were added, and the reaction was kept for 4 hours.

[0055] (3) Heat up to 90°C, add undecylenol capping agent, keep warm for 2 hours, pour it into the tetrafluoro template while it is hot, put it in a vacuum oven, and get the thickener produc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Rotational viscosityaaaaaaaaaa
Rotational viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a multi-branched polyurethane associative thickening agent containing a C=C double bond. The multi-branched polyurethane associative thickening agent comprises branched polyethylene glycol, diisocyanate, an enol end-capping reagent and a catalyst, wherein a mol ratio of branched polyethylene glycol to diisocyanate to the enol end-capping reagent is 1: 1.65: 0.3, and the catalyst accounts for 0.05 to 2% by mass of the total thickening agent. The invention also discloses a preparation method for the thickening agent. The multi-branched polyurethane associative thickeningagent containing the C=C double bond can participate in the ultraviolet-curing cross-linking reaction of an UV paint system since the thickening agent contains active double- bond function groups; sothe thickening agent has excellent thickening effect, and when the usage amount of the thickening agent is 5%, the rotation viscosity of a waterborne UV polyurethane paint can be increased from 320 cps to 8000 cps or more under the condition of a rotation speed of 6 rpm, and a rotation viscosity ratio is greater than 2.0.

Description

technical field [0001] The invention relates to the preparation of a functional polymer material, in particular to a hyperbranched polyurethane associative thickener containing C=C double bonds and a preparation method thereof, belonging to the field of chemical synthesis of new materials. Background technique [0002] In recent years, water-based paints have become the general trend to replace oil-based paints. Due to the different viscosity requirements of water-based paints during storage and construction, thickeners are needed to adjust the viscosity and rheological properties of the system. During storage, maintain high viscosity and prevent pigments from Coagulation and precipitation, in the process of brushing, through shear thinning, so that the paint has better brushability, after brushing, after a short viscosity hysteresis, the coating film is leveled and the viscosity recovers. By using a thickener, the high-shear and low-shear flow properties of the paint can be...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09D7/65C09D175/04C08G18/76C08G18/73C08G18/75C08G18/67C08G18/48C08G18/10
CPCC08G18/10C08G18/4833C08G18/6715C08G18/73C08G18/755C08G18/758C08G18/7614C08L2205/02C09D175/04C08L75/14C08G18/48
Inventor 施丹王锋
Owner 优卡化学(上海)有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com