GREEN POLYURETHANETM 

The first hybrid polyurethane-based coatings, adhesives & foam that 

eliminate the use of toxic isocyanates from the entire production process 
Nanotech Industries, Inc. (NTI) 

 HCT was started by NTI, an intellectual property development 

and commercialization company with a pipeline of 14 

patented technologies, which began in 2008 

 NTI’s focus: nano and materials science-based applications 

 NTI owns the patents and process know-how for the world’s 

first commercial Hybrid Non-Isocyanate Polyurethane, also 

referred to as “NIPU”, “HNIPU”, “Green PolyurethaneTM”, or 

“Epoxyurethane”, available as coatings, adhesives and foam 
Polymate – INRC, Israel 

 NTI & HCT’s scientific partner, staffed with world-leading materials 

scientists 

 Polymate’s co-founders: Prof. Oleg Figovsky, the co-inventor of 

HINIPU, and Alex Trossman, are officers as well as part owners of 

NTI and HCT 

 Prof Figovsky: Academician of the European Academy of Sciences, 

Director of R&D for NTI, HCT and INRC Polymate, Editor-in-chief of 

journals – TOCJ and ICMS (USA), SITA (Israel) and Chairman of 

the UNESCO Chair "Green Chemistry” 

 NTI patents originated from Polymate scientists including 6 for 

HNIPU (composition & method) 
Hybrid Coating Technologies 

 Started July of 2010 

 For the purpose of commercializing HNIPU 

technologies 

 NTI has exclusively licensed its HNIPU coatings, 

adhesive and foam material to HCT 

 Headquartered in Daly City, CA with offices in 

Berlin and Israel and toll manufacturing in South 

San Francisco, Israel and Los Angeles with a total 

capacity of over 100,000 tons 
HNIPU “Uramine” Hardener Technology 

 Hybrid polymeric materials, 

which combine properties of 

polyepoxides and 

polyurethanes improve 

 properties of epoxy-amine 

 materials 

 Optimal method: “Uramine” 

hardeners, which contain 

 “Hydroxy Urethane Modifiers” 

 (“HUM”) 
“HUM” & “Uramines” 

 “Hydroxy Urethane Modifiers” (HUM) are the 

patented backbone technology of HNIPU - 

formulated within curing agents called 

“Uramines” (Urethane Amines) 

 Developed for epoxides to enhance their properties 

to the level of a polyurethane or better 
Advantages of Materials Based on 

Uramine Hardeners 

 Zero isocyanates 

 Zero VOCs

 Improved physical-mechanical properties 

 Improved light stability properties 

 High decorative appearance

 Used for curing epoxy compositions for a wide 

range of materials including coatings, foam, 

adhesives and sealants 

As evaluated, Uramines are 100s of 

times less toxic than conventional 

isocyanate-based hardeners in PU 
Green PU Coatings – 

Zero Isocyanate/VOC Savings 

 Zero isocyanates, zero VOC, and minimal odor 

reduce costly application safety measures: 

• HVAC shut down & ventilation equipment 

• Shutdown of business operations adjacent to 

application zone and corresponding costs to pay 

facilities management, movers, Health & Safety for 

weekend work 

• Scheduling changes, emergency evacuation 

assessment, displacing workers, students, etc. 

• Security for late evening and/or weekend work 

• less layers saves in material and labor 

 Creating 30-60% in application savings as 

compared to other premium PU brands 
Food Packaging Manufacturing Facility 

 

Montreal, Quebec

during 

application 
Plastic Manufacturing Facility, Israel

during 

application 
Plastic Manufacturing Facility, Israel

after application 
Carmel Mizrakhi Winery, Israel 
HNIPU Coating Property Advantages

 2 times better wear resistance 

 10-30% higher 

adhesion (depends 

on substrate) 

 Up to 30% increased 

 hardness

 4 times better tensile strength 

Delek Gas 

Stations – 

Israel 
Green PUTM Parking Garage, Israel 
Sonoma Raceway Garage, 

California 

Before After 
BMW Showroom, France 
Insensitive to Moisture 

 Due to the absence of isocyanates and an added intramolecular hydrogen bond, Green PUTM is completely 

insensitive to moisture and virtually water proof 

 Green PUTM is 28 times more water and HCI resistant 

than conventional PU resulting in greater durability, 

corrosion resistance and longevity of the coating 
Suggested Applications 

 Protective floor coatings and paint for industrial and 

commercial facilities 

 Marine applications 

 Delivery equipment for fertilizer & other chemicals 

 Military equipment 

 Protective coatings inside pipelines 

 Clean processing areas: food, drug, medical industries 
Commercialization of Coatings 

 Currently selling in US, S. America, Canada 

and Europe 

 Distributing hardener to multi-billion dollar 

coatings company in S. America 

 Completed development of a new DIY product 

for a coatings company with distribution in over 

4,000 big box stores in US 

 Advanced negotiations and testing with 3 more 

multi-billion concerns for licensing and 

distribution 
 Based on same chemistry as HNIPU coatings 

 Energy savings of more than 30% 

 High R-values: up to 6.0/inch 

 1.5 times higher tensile strength 

 No need for primer 

 Fire resistance 

 Greater adhesion 

 Applications: 

• Thermal Insulation 

• Automotive 

• Furniture 

• Upholstery and bedding 

• Seals and gaskets 

• Packaging 

Green PolyurethaneTM Foam
Conventional PUF vs. HNIPU Foam 

Characteristics Conventional PUF HNIPU foam 

Apparent density, kg/m3 30 - 100 30 - 100 

Stress at break, MPa 0.15 - 1.0 0.2 – 1.5 

Thermal conductivity, 

W/mK 0.8 - 1.0 0.8 - 1.0 

Number of closed cells, 

at least % 30 - 90 30-90 

Water absorption, vol. 

% 2.5 - 3.5 2.5 - 3.5 

Field of use Non-dwelling housing No restrictions 
Development of HNIPU Foam 

 Pourable rigid and flexible foam prototypes manufactured 

• Variations contain up to 40% vegetable oil 

• Open and Closed cell (30-90% closed cell) 

 SPF in development and, with proper equipment and 

investment, expected to be ready for market in next 1 – 

1.5 years 

• With equal or better properties and conventional industry 

application methods, e.g., Graco spray reactors 

 Patent application for forming HNIPU SPF submitted
HNIPU SPF Development Priorities 

• Partnership with US University to support 

final development in US 

• Funding to support research and equipment 

plus optimal eco-friendly retardants and 

blowing agents 

• Development of Pilot HNIPU SPF 

technology 

• Optimization and development of 

commercial scale production 
Proprietary Chemistry of Green PUTM 

 NIPU networks are obtained through a reaction 

between polycyclic carbonate oligomers and 

aliphatic or cycloaliphatic polyamines with 

primary amino groups. This forms a crosslinked

polymer with β-hydroxyurethane groups of 

different structure resulting in a 

polyhydroxyurethane polymer. 

 Since NIPU is obtained without using highly 

toxic isocyanates, the process of synthesis is 

relatively safe for both humans and the 

environment compared to the production of 

conventional polyurethanes. 
Proprietary Chemistry of Green PUTM 

Above: β -hydroxyurethane fragments of 

polymer chains formed as difunctional starting 

materials with two options: secondary hydroxyl 

groups (A) and primary hydroxyl groups (B) 
Proprietary Chemistry of Green PUTM 

 NIPU is not sensitive to moisture in the 

surrounding environment. 

 Hydroxyl groups formed at the β-carbon 

atom of the urethane moiety increase 

adhesion properties. 

 Plurality of intra and intermolecular 

hydrogen bonds as well as an absence of 

unstable biuret and allophanate units seem 

to be responsible for increased thermal 

stability and chemical resistance to nonpolar solvents. 
Hydroxyalkyl Urethane Modifier 

(HUM) 

HUM is obtained as a result of a reaction between a primary 

amine and a cyclic carbonate compound at stoichiometric ratio, 

and can be represented by the formula: 

wherein R1 is a residue of the primary amine, R2 and R3 are the 

same or different and are selected from the group consisting of H, 

alkyl, hydroxyalkyl, and n satisfies the following condition: n ≥ 2 

(US Patent 7,989,553, 2011). 
 

4,4'-(1-methylethylidene)bis-cyclohexanol

based epoxy resin 

 

Trimethyol Propane Triglycidyl Ether 

Neopentyl Glycol Diglycidyl Ether 

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Cycloaliphatic and aliphatic non-BPA based epoxy resins 

Cyclohexanedimethanol Diglycidyl Ether 

Preferable Epoxy Resins 
Possible Cyclic Carbonates 

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Carbonated epoxidized unsaturated fatty acid triglyceride 

Propylene carbonate Polyoxypropylene tricyclic carbonate 
Raw Amines 

PPGs amine terminated di- and tri-amines with MW up to 5000 

Bio-based polyamines – idealized chemical structures 
New Long Chain Epoxy-Amines 

 NTI recently submitted a US patent application for new 

hybrid epoxy-aminehydroxyurethane network polymers with 

lengthy epoxy-amine chains and pendulous 

hydroxyurethane units, described in the following scheme: 

• where R`and R``are residues of epoxy resins, 

• E is a converted epoxy group, i.e., –CH2–CH(OH)–CH2–O–, 

• N is a nitrogen atom, 

• A is a residue of an amine, 

• U(OH) is a hydroxyurethane group. 
 Cured linear hybrid epoxy-amine 

hydroxyurethane-grafted polymer with its novel 

structure of long epoxy-amine chains, 

pendulous hydroxyurethane units and a 

controlled number of cross-links result in: 

• Increased flexibility (70-275% elasticity in coatings) 

• Well balanced physical-mechanical (12.0 MPa

tensile strength in coatings) and physical-chemical 

properties of conventional epoxy-amine systems 

• Potential use in multiple applications including: 

synthetic leather and monolithic flooring for athletic 

facilities 

New Long Chain Epoxy-Amines 
New Hybrid Polyhydroxyurethane

Network on a Base of Vegetable Oil

Hybrid epoxy-hydroxyurethane compositions cross-linked at 

ambient temperatures were obtained on the base of renewable 

raw materials. Networks of hybrid polyhydroxyurethane were 

formed from carbonated-epoxidized soybean oil, without the use 

of isocyanate intermediates. Compositions can apply to the 

preparation of curable coating materials and curable polymeric 

foams. 

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New Radiation-Curable 

Bio-Based Composition

A radiation-curable composition comprising (meth)acrylic monomers and/or 

oligomers, photoinitiators, and a nonreactive composite additive, wherein the 

nonreactive composite additive comprises a) a biobased hydroxyurethane additive 

of formula (1): 

R1[−NH−COO−CR2H−CR3H(OH)]2 (1)

wherein R1 is a residue of the biobased primary diamine, and R2 and R3 are the 

same or different and are selected from the group consisting of H, alkyl, and 

hydroxyalkyl; and b) a silane-based hydroxyurethane additive of formula (2): 

(R6)3-n(OR5)nSi−R4−NH−COO−CR2H−CR3H(OH) (2)

wherein R2 and R3 are the same as stated above, R4 is generally an aliphatic group 

having from 1 to 6 carbon atoms, R5 and R6, independently, are hydrocarbon 

radicals containing from 1 to 20 carbon atoms and selected from the group 

consisting of aliphatic, cycloaliphatic, and aromatic groups or combinations 

thereof, and n is equal to 1, 2, or 3 (US Application 14/160,297, 2014). 

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