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Innovating Construction Performance Through Advanced PU Systems

Gary Chen

Technical Director – Coatings, Adhesives & Sealants

Wanhua Chemical Beijing

WANHUA CHEMICAL GROUP CO.,LTD.

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Contents

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Innovative Polyurea Solutions

High-Performance Adhesive Solutions

Company Profile

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Wanhua Introduction

Wanhua Chemical is a globally operated chemical new materials company：

  • Ranked 11th of C&EN’s Global Top 50 chemical companies
  • Over 30,000 employees worldwide
  • Provide competitive products and solutions for global customers

Our HSE commitment :

  • Goal of “Zero harm, Zero accident, and Zero emission”
  • Head towards an advanced and eco-friendly chemical enterprise
  • Pioneer a sustainable and low carbon era

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1.1 Global Wanhua

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1.2 Industry Cluster

Polyurethanes

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World-leading enterprise in MDI/TDI/polyol

technology

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The most competitive polyurethane supplier globally

Fine Chemicals

Technology leading enterprise in the global ADI industry chain

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World-leading water-based raw materials and degradable plastics manufacturing technology

World-class high-performance materials/nutritional products supplier

Becoming a global leading company in battery materials technology

Emerging Materials

Future Industry

Accelerating the exploration of cutting-edge technologies by virtue of AI

Becoming a leader in technologies such as synthetic biology, electrochemistry, and comprehensive utilization of CO2

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Petrochemicals

A world-class C2/C3/C4 industry chain

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World-class manufacturer of polyolefins/PVC

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China's leading downstream olefin product supplier

World-leading PO technology

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1.3 Polyurethane Technology Platform

Flexible Foam Technology Platform

Vehicles & Upholstered furniture & Health

Elastomer

Technology Platform

Shoes & CPU & Industrial damping

Composite Materials Technology Platform

Vehicles & Building materials & Photovoltaic

Polyurethane Pavement

Technology Platform

Highways & Color pavements &

Road restoration

Iteration

Extension

Boundary Expansion

Sustainability

Wood Processing

Technology Platform

Wood panel & Molded pallets & Wood crafts

Adhesives

Technology Platform

Flexible packaging &

Ink & PUR & Paving

Sealing & Encapsulation

Technology Platform

Electronic battery adhesives & Transportation & Construction

  • Explore various applications & achieve sustainable growth through product up-gradation & technology innovation.

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02

Innovative Polyurea Solutions

2.1 Polyurea Chemistry & Fundamentals

2.2 Spray Polyurea

2.3 Hand-brushed Polyurea

2.4 Supporting Primers for Polyurea

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Microphase-separated Structure

Hydrogen bonding between urethane groups

High degree of inter-urea hydrogen bonding

2.1 Definition of Polyurea

R-NCO + R’-OH → R-NH-C-OR’

=

O

R-NCO + R’-NH2 → R-NH-C-NH-R’

=

O

Urea group

Urethane group

Reaction Mechanism of Polyurea

Microphase separation of hard and soft segments, reinforced by strong hydrogen bonding between urea groups, endows polyurea with excellent mechanical properties and durability.

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2.1 Advantages of Spray Polyurea

  • Ultra-Fast Curing
  • User-friendly and Eco-friendly
  • Excellent Mechanical Performance
  1. Seamless coating
  2. High mechanical strength and impact resistance
  3. Strong adhesion to steel, concrete, and wood substrates
  4. Excellent durability and long service life
  1. Reacts almost instantaneously.
  2. The gel and tack-free times are typically within 30s,
  3. This enables higher production throughput and a superfast return to service for coating applications.
  1. 100% solid content
  2. Low VOC and low emissions
  3. Sag-resistant application
  • Versatile Applications
  1. Reliable waterproof coating for all construction scenarios.
  2. Superior anti-corrosion coating for metal pipes and chemical equipment.
  3. High wear-resistant lining for pickup truck cargo beds

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2.1 Mechanical Strength

Substrates

Adhesion / MPa

concrete

4.5*

Steel (Sa 2.5)

24

Aluminum

15- 18

Plywood

1.75 *

Chloroprene rubber

8.9 *

* Substrate Failure

Note:All performance data based on WANNATE 83** pure polyurea formulation.

  • Adhesion Strength
  • Impact Resistance
  • Crack Bridging Performance

Item

Before

After

Tensile strength, MPa

22.6

20.8

Elongation at break, %

524

502

Tear strength, KN/m

72

66

Hardness, Shao A

89

90

*

  • Ageing Resistance

*Aging resistance test indicators 160 days

With polyurea protection:

Indentation depth 91→19 cm;

No cracking or breakage occurred

With polyurea protection:

Concrete cracking occurs, the polyurea coating remained intact.

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2.1 Applications

Construction Waterproofing

Pickup Truck Bed Liner

Pipeline Corrosion Protection

Speaker Protection

Marine Anti-corrosion

Foam Structural Protection

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2.1 Applications-Mining

Mine Cart Lining

Mine Truck

Ore Washing Drum

Conveyor Belt Repair & Protection

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2.1 Applications-Agricultural

Granary Interior Lining

Granary Exterior Lining

Grain Truck

Metal Roof

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2.2 Spray Polyurea

  • Typical Formulation

A side：

WANNATE 8310、WANNATE 8312 etc.

R side：

Polyether Polyol：C2010、C2020、F3135 etc

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Amine chain extender：Wanalink 6200/MDBA

Custom formulation guidance is available upon request

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Pure Polyurea

Hybrid Polyurea

A side

Prepolymer

Prepolymer

R side

Polyether Amine-1

Polyether Polyol-1

Polyether Amine-2

Polyether Polyol-2

Amine chain extender-1

Amine chain extender-1

Amine chain extender-Wanalink 6200

Amine chain extender- Wanalink 6200

Color paste

Color paste

A:R=1：1（Volume ratio）

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.2 Spray Polyurea - Prepolymer

  • Polyurea Prepolymers with Diverse Properties

Product Grade

NCO Content

wt%

Viscosity

mPa.s(25℃）

Theoretical

Functionality

Key Features

Applications

WANNATETM8339

12.0-13.0

380-580

2.00-2.05

  • Moderate Activity, High Elongation

Waterproofing

WANNATETM8353

13.5-14.5

1000-1200

2.00-2.05

  • Low Activity, High Elongation

WANNATETM8312

15.2-16.2

600-800

2.00-2.05

  • Low Reactivity

WANNATETM8326

15.2-16.2

600-800

2.00-2.05

  • Moderate Reactivity

WANNATETM8310

15.2-16.2

600-1000

2.00-2.05

  • High Reactivity, High Hardness

WANNATETM6930

22.5-23.7

500-1200

2.25-2.35

  • High Functionality, High Hardness

Anti Corrosion

WANNATETM8319

20.8-21.8

260-460

2.05-2.15

  • High Hardness-Truck bed lining

WANNATETM8322

24.4-25.4

1100-1500

2.555-2.65

  • Ultra-high Hardness-Pipe Wear Resistance

Wear Resistance

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.2 Spray Polyurea - Solutions

Items

Unit

Waterproofing

Wear Resistance

Corrosion Resistance

Flame Resistance

Gel Time

s

22

24

45-60

20

Tack-free Time

s

48

50

100-240

48

Tensile Strength

MPa

19-21

17-21

23-25

14-20

Elongation

%

450-470

400-450

10-15

400-470

Tear Strength

N/mm

85-90

75-80

75-80

48-50

Hardness

Shore A

90-91

93-95

/

/

Hardness

Shore D

40-42

43-47

70-75

50-53

Flame Retardant

/

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V-1

Prepolymer

WANNATE 8312

WANNATE 8310

WANNATE 8322

WANNATE 8353

Applecations

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允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.3 Hand-brushed Polyurea

Hand-brushed Polyurea

  • No specialized spray equipment required;
  • Long pot life supports multiple construction methods: brushing, roller coating and spraying;
  • Adequate open time ensures full substrate wetting.

Spray Polyurea

  • Ultra-fast curing: ~30 seconds working window
  • Specialized spray equipment mandatory
  • Requires trained professional applicators

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.3 Hand-brushed Polyurea

  • Localized waterproofing renovation;
  • Small-area concrete protective;
  • Elastic flooring systems;
  • Joint filling & sealing, etc.

Application:

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.3 Hand-brushed Polyurea - Performance

Basic recommended formula :

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Composition

pbw

A side

Low activity isocyanate prepolymer

WANNATE8380

200

R

side

WANALINK 6200 and

other liquid chain extenders

30~35

Plasticizers or solvents

10~20

Solid fillers

50~60

Additives

1~5

SUM

100

A:R=2：1（mass ratio）

Performances：

Test item

Typical Value

Pot Life / min

25

Tack-free Time/h

1.3

Dry-through Time/h

7

Tensile Strength/MPa

>22

Elongation at break/%

>500

Tear Strength/（N/mm）

>65

Impermeability

0.4MPa,2h, impermeable

Water absorption/%

0.4

Adhesion Strength /MPa

>3.5

Shore A Hardness

89

Prepolymer

NCO%

Viscosity mPa.s(25℃）

Product Description

WANNATE ® 8380

5.5-6.5

2000-4000

Low reactivity, low viscosity, long pot life, high strength

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.3 Hand-brushed Polyurea - More Solutions

�

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Application :

  • Railway Track Expansion Joints
  • Waterproof Filling Sealants

Advantages：

  • High flexibility with widely tunable tensile strength；
  • Thermal stability (-40 to 120℃)

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High flexibility Sealing

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02

Elastic flooring

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Rigid Protective

Application：

  • Pipeline Repair
  • Steel Corrosion Protection

Advantages：

  • Acid and alkali resistance
  • Good adhesion strength to steel plate

3 - 10 MPa

600% ~ 1200%

25 - 35 MPa

50 ~ 75D

10 - 20 MPa

80% ~ 200%

Application ：

  • Intermediate Coat / Top Coat for Flooring

Advantages：

  • Good strength and toughness
  • Good moisture resistance, resistant to blistering.

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允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.3 Hand-brushed Polyurea - Project Cases

Building Waterproofing Renovation

Exterior Wall Repair

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.4 Supporting Primers for Polyurea Systems

  • 1K polyurethane primer

Product

NCO/%

Viscosity

mPa.s(25℃）

Theoretical

Functionality

Product Description

WANNATE 6928

15.6-16.6

2500-4500

2.40-2.50

  • High Reactivity, High Strength, Good Adhesion

WANNATE 8324

14.4-16.4

1000-2000

2.00-2.05

  • Low viscosity, high elongation, Fast curing
  • Fast Drying Performance

Surface dry within 4 hours at 25℃, 50% RH, with short overcoat window.

  • Good Adhesion

Pull-off adhesion test on concrete results in substrate failure.

  • Sealing Property

Dense, tough coating with outstanding sealing performance.

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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2.4 Supporting Primers for Polyurea Systems

  • 2K polyurethane primer system for damp concrete

Item

Units

Specifications

Operating Time

(20°C 50% RH)

hrs

1.5

Tack-free Time

hrs

3.5

Hardening Time

hrs

6.5

Coverage Rate

kg/m²

0.15

Overcoat Window

hrs

1-168

Pull Off Adhesion

MPa

>4.0 (Concrete)

Mode of Failure

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Substrate Failure

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2K primer

A side

WANNATE 6903

R side

Mixed polyols

Additives

A:R=1:1（mass ratio）

FEATURES

  • 2K Primer for Concrete and Wood
  • Solvent-free
  • Penetrates and Seals Porous Substrates, Forming a Smooth, Pinhole-free Film
  • Excellent Adhesion to a variety of substrates
  • Resists Blistering Even on Damp Concrete Surfaces
  • Outstanding Stability at Low Temperatures

允许颜色

Colors allowed

R: 255

G: 193

B: 0

R: 146

G: 208

B: 80

R: 187

G:195

B: 206

R: 91

G: 155

B: 213

R: 132

G: 151

B: 176

R:0

G: 72

B: 157

R: 0

G: 150

B: 220

R: 38

G: 38

B: 38

R: 0

G: 0

B: 0

R: 255

G:255

B: 255

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03

High-Performance Adhesive Solutions

3.1 Structural Adhesives for Sandwich Panels

3.2 Rubber Binders

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  • Wood Panel - OSB
  • Stainless Steel Panel
  • Fiber Cement Board

3.1 Panel Structural Adhesive

One-component Moisture-curing PU Adhesives for Structural Bonding

  • Easy Operation: One-component moisture-curing PU adhesive, no mixing, ready-to-use.
  • Flexible Application: Supports manual brushing and automatic machine dispensing.
  • Strong Adhesion: High bonding strength to wood, metal, composite panels.
  • Durable Performance: Weather, aging & impact resistant, suitable for long-term structural load.
  • Application
  • Typical Products
  • Features

Structural Insulated Panel（SIP）

Insulated Steel Sandwich Panel

Sheathing

Foam Core

  • EPS Foam
  • PU Foam
  • PIR Foam

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3.1 Panel Structural Adhesive

  • Solvent-Free Products

Product

NCO/%

Viscosity

mPa.s(25℃）

Product Description

WANNATETM 6928

15.6-16.6

2500-4500

  • High Reactivity,, Good Adhesion

WANNATETM 6928K

15.6-16.6

2500-4500

  • Faster reaction rate than W6928.

Temperature and Humidity

Pot life

Curing time

6928K

6928

6928K

6928

2℃&65%rh

＞1h

＞1h

1.5h

3.5h

5℃&40%rh

＞1h

＞1h

2h

3h

15℃&25%rh

＞1h

＞1h

2.5h

4.5h

25℃&50%rh

0.5h

1h

0.8h

1.5h

50℃&95%rh

＜15min

＜15min

＜0.5h

＜0.5h

  • Curing Speed

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3.2 Rubber Binder

Solvent Free Binders for Rubber granules, with strong bonding, reliable elasticity and stable workability

➕

PU Binder

EPDM Granules or

Recycled Tire Granules

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  • Applications

Running Track

Kindergarten

Park

Basketball Court

Fitness Gym

Fitness Trail

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3.2 Rubber Binder - Products

WANNATE 6112

Features:

• Excellent bonding strength

• Moderate curing speed

Applications:

• School athletic fields

• Community park running tracks

WANNATE 6161

Features:

• Excellent non-yellowing performance

• Outstanding aging resistance

Applications:

• Colorful Running Track

• Kindergarten Playground

WANNATE 6148

WANNATE 6143

Features:

• Strong initial and final adhesion

• Excellent elasticity and flexibility

Applications:

• Indoor floor sound insulation

• Recording studio wall decoration

Standard Track Binder

Features:

• Optimized for hot-press process

• High elasticity and shock absorption

Applications:

• Professional gym strength areas

• Children’s Play Areas

  • Professional Adhesive Solutions for Running Tracks: Four Core Applications

Non-Yellowing Binder

Hot-Press Mat Binder

Roll Binder

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3.2 Rubber Binder - Anti-yellowing

  • Anti-yellowing Performance

WANNATE 6161

General Rubber Binder

  • Aging Resistance

Aging Time

Test items

Standard*

Test Result

Verdict

Before Aging

Tensile Strength

>0.4 Mpa

0.69 Mpa

Pass

Elongation

>40 %

70 %

Pass

500h Aging

Tensile Strength

>0.4 Mpa

0.60 Mpa

Pass

Elongation

>40 %

59 %

Pass

* Reference Standard: GB 36246-2018; EPDM Granules; Adhesive Dosage: 20%

  • 1000h QUV Accelerated Aging
  • 7-day Outdoor Exposure

D1 D2 D3 D4 D5 D6 D7

General Rubber Binder

WANNATE 6161

  • 1000h QUV Accelerated Aging
  • Test Conclusion

1. Outstanding Yellowing Resistance

Minimal color change under long-term outdoor exposure, maintaining stable appearance and extending service life.

Stable tensile strength and elongation are retained after long-term aging, mechanical performance meets standard requirements.

2. Good Aging Resistance

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Advancing Chemistry, Transforming Lives!

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