Polyurea type polyurethane coating, raw material composition and use of polyurea type polyurethane coating

A polyurethane coating and raw material composition technology, applied in the direction of polyurea/polyurethane coating, coating, etc., can solve the problems that the mechanical properties cannot reach the level of sprayed polyurea, the surface dry time and the construction time are long, and the temperature and humidity are not sensitive , good protection performance and wide applicability

Active Publication Date: 2018-07-03
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in order to overcome the lengthy construction time caused by the too long gel time or surface drying time of polyurethane coatings in the prior art, and the mechanical properties cannot reach the level of sprayed polyurea, and sprayed polyurea is not suitable The problem of small-area spraying, thereby providing a polyurea type polyurethane coating, raw material composition and use thereof

Method used

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  • Polyurea type polyurethane coating, raw material composition and use of polyurea type polyurethane coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of prepolymer

[0046] In terms of mass percentage, first add 42% DL-2000, 16.5% chlorinated paraffin and raise the temperature to 105-120°C for dehydration, then dehydrate at negative pressure -0.095MPa for 1.5h, then cool down to 60°C and add 41.5% MDI-50, After stirring and dispersing, raise the temperature to 78°C, fully react for 3 hours, cool down to 50-60°C, filter and discharge the material to obtain the prepolymer.

[0047] (2) Preparation of polyols

[0048] In terms of mass percentage, first add 65% 330N and heat up to 100-105°C, add 30% o-chloroaniline to disperse for 0.5-1h, then add 0.1% BYK-P104S and 4% titanium dioxide, and heat up to 105-120°C ℃, dehydration at negative pressure -0.095MPa for 2h, then lower the temperature to 65℃, add 0.1% BYK-066N, 0.5% BASF-B97, 0.3% T-12, stir and disperse for 0.5~1h, degassing at negative pressure -0.095MPa After 1h, the material was filtered to obtain polyol.

[0049] (3) Preparation of repairing...

Embodiment 2

[0052] (1) Preparation of prepolymer

[0053] In terms of mass percentage, first add 60% of PTMG-2000 and heat up to 105-120°C for dehydration, dehydrate at negative pressure -0.095MPa for 1.5h, then cool down to 50°C and add 40% IPDI, stir and disperse, then heat up to 75°C, fully After reacting for 3 hours, lower the temperature to 50-60°C, filter and discharge the material to obtain the prepolymer.

[0054] (2) Preparation of polyols

[0055] In terms of mass percentage, first add 72% of 330N and heat up to 100-105°C, add 22% of diethyltoluenediamine to disperse for 0.5-1h, then add 0.15% of BYK-110 and 5% of barium sulfate, and heat up to 105~120°C, negative pressure -0.095MPa dehydration for 2h, then cool down to 65°C, add 0.15% BYK-065, 0.5% BASF-B75, 0.2% BICAT 8, stir and disperse for 0.5~1h, negative pressure -0.095MPa After defoaming for 1 hour, the material was filtered to obtain polyol.

[0056] (3) Preparation of repairing polyurea type polyurethane waterproof ...

Embodiment 3

[0059] (1) Preparation of prepolymer

[0060] In terms of mass percentage, first add 40% of DL-2000, 10% of MN3050 and 20% of diisobutyl phthalate to dehydrate at 105-120°C, dehydrate at negative pressure -0.095MPa for 1 hour, and then cool down to 60 Add 30% TDI-80 at ℃, heat up to 78℃ after stirring and dispersing, fully react for 3 hours, cool down to 50-60℃, filter and discharge, and obtain prepolymer.

[0061] (2) Preparation of polyols

[0062] In terms of mass percentage, first add 61% of 330N and 8% of T5000 to heat up to 100-105°C, add 25% of dimethylthiotoluenediamine to disperse for 0.5-1h, then add 0.1% of BYK-161 and 5% 3A molecular sieve, heated up to 105-120°C, dehydrated at negative pressure -0.095MPa for 2h, then cooled to 65°C, added 0.1% BYK-067, 0.6% BASF-765, 0.2% BICAT Z and stirred for 0.5-1h , Negative pressure -0.095MPa defoaming 1h, filter and discharge, obtain polyol.

[0063] (3) Preparation of repairing polyurea type polyurethane waterproof coat...

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Abstract

The invention discloses a polyurea type polyurethane coating, a raw material composition and use of the polyurea type polyurethane coating. The raw material composition of the polyurea type polyurethane coating contains a prepolymer and polyol and does not contain organic solvent, and the mass ratio of prepolymer to polyol is 1 to (0.8-2). A coating prepared from the raw material composition is relatively short in surface drying time, has very good mechanical property, does not contain organic solvent and is environmentally friendly, convenient to use and relatively suitable for being used asa manual patching material.

Description

technical field [0001] The present invention relates to polyurea type polyurethane coating, raw material composition and application thereof. Background technique [0002] Polyurea coating is spraying polyurea elastomer. It is a fast-response two-component coating with a solid content of close to 100%. It is non-toxic and environmentally friendly, low VOC, fast curing, insensitive to temperature and humidity in the construction environment, and thick on the facade. With the characteristics of no sag, strong mechanical properties and strong substrate adaptability, it is widely used in waterproof and anti-corrosion fields such as high-speed rail, underground engineering, coastal engineering, large stadiums, large playgrounds, and roofs. [0003] In practical engineering applications, local areas often need to be repaired. These areas are local bubbles, peeling, or artificial damage, or coating defects left by inspection, or edge warping of sprayed polyurea, or detail nodes, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/50C08G18/44C08G18/10C08G18/12C09D175/02C09D175/08C09D175/04
CPCC08G18/10C08G18/12C08G18/4018C08G18/44C08G18/48C08G18/4804C08G18/482C08G18/4854C08G18/5024C09D175/02C09D175/04C09D175/08C08G18/6666C08G18/6685
Inventor 杜辉张国标李卓刘雨奚江涛董建国
Owner SHANGHAI DONGDA CHEM
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