US 6,649,727 B1 · Aqueous colloidal dispersions of sulfonated polyurethane ureas and products

Abstract

The present invention relates to stable colloidal dispersions of sulfonated polyurethane ureas and self-supporting films formed from these dispersions. After formation of the sulfonated polyurethane urea, alcohols can be added to the aqueous dispersion to provide a water-alcohol system. The films of the present invention are minimally tacky and self-adhesive.

Drawings

Drawings are temporarily unavailable. Open the PDF at USPTO

Drawings

Claims23

Dependent claims

A composition comprising a sulfonated polyurethane urea comprising the reaction product of:

(a) one or more sulfonated polyols;
(b) one or more non-sulfonated polyols selected from the group consisting of polyether polyols, polyester polyols, polycaprolactone polyols, and mixtures thereof;
(c) one or more aliphatic polyisocyanates, having 2 to 25 carbon atoms, or cycloaliphatic polyisocyanates, having 3 to 25 carbon atoms;
and
(d) excess water, wherein:
the sulfonated polyurethane urea has been chain-extended with water;
the reaction product of (a), (b), and (c) has an isocyanate to hydroxyl ratio of 1.3:1 to 2.5:1;
and
the reaction product of (a), (b), (c) with (d) has a sulfonate equivalent weight of from about 1000 to about 8500 and comprises a polyurea segment of the following formula:
wherein z is an integer from 1 to 6 and R3 is an aliphatic group, having 2 to 25 carbon atoms, or a cycloaliphatic group, having 3 to 25 carbon atoms, derived from the aliphatic or cycloaliphatic polyisocyanate.

7 more elements

Dependencies are inferred from the claim text.

Description8,789 words

Summary4,273 words

#The present invention relates to stable aqueous colloidal dispersions of sulfonated polyurethane ureas and self-supporting films formed from these dispersions. After formation of the sulfonated polyurethane urea, alcohols can be added to the aqueous dispersion to provide a water-alcohol system. The films of the present invention are minimally tacky and self-adhesive.

#Polyurethanes are a well-established class of high performance polymers, which can be readily tailored to display unique combinations of tensile strength, toughness, and flexibility. As a result of this versatility, polyurethanes have found utility in a variety of applications including binder resins, abrasion resistant coatings, protective coatings, and membranes.

#Polyurethanes may be delivered to a substrate in one of three ways: i) extruded as a melt processable thermoplastic or thermoset material, ii) delivered as a moisture curable or two part curable system, generally from an organic solvent, or iii) delivered as an aqueous dispersion of a colloidal polymer system. Two part polyurethanes are generally used in binder or coating applications where they are delivered either from mixtures of organic solvents, blocked isocyanate terminated compounds, and diamine curatives, or mixtures of organic solvents, a diisocyanate terminated compound and polyols.

Detailed description4,516 words

#The present invention will be further illustrated, but not limited by, the following examples and evaluations. All parts, percentages, and ratios are by weight unless otherwise specified.

#The following Table I is a compilation of the materials used in these experiments.

#TABLE I Name or Acronym Chemical Name Source Lexorez ™ 1100- Diethylene glycol/adipic Inolex Chemical Company 220 acid polyester polyol Philadelphia, PA Fomrez ™ 8056- Neopentyl glycol, 1,6- Witco Corp. 146 hexanediol, isophthalate, New York, NY & Houston, adipate polyester polyol TX PEG-1000 Carbowax ™ Poly- Union Carbide Corp. ethylene glycol - 1000 Danbury, CT PEG-600 Polyethylene glycol - 600 Aldrich Chemical Company Milwaukee, WI PEG-400 Polyethylene glycol - 400 Aldrich Chemical Company Milwaukee, WI PEG-300 Polyethylene glycol - 300 Aldrich Chemical Company Milwaukee, WI PEG-3400 Polyethylene glycol - Aldrich Chemical Company 3400 Milwaukee, WI PPG-425 Arcol ™ PPG-425 (Poly- ARCO Chemical Company propylene glycol - 425) Newtown Square, PA PPG-1000 Arcol ™ PPG-1000 ARCO Chemical Company (Polypropylene glycol - Newtown Square, PA 1000) PPG-1025 Arcol ™ PPG-1025 ARCO Chemical Company (Polypropylene glycol - Newtown Square, PA 1025) Tone ™ 0210 Tone ™ 0210 Poly- Union Carbide Corp. caprolactone diol Danbury, CT IPDI Desmodur ™ I Bayer Corporation (Isophorone Diisocyan- Pittsburgh, PA ate) CAS# 4098-71-9 H12MDI Desmodur ™ W (bis(4- Bayer Corporation isocyanato-cyclohexyl)- Pittsburgh, PA methane) CAS# 5124- 30-1 MDI Mondur ™ M (Diphenyl- Bayer Corporation methane diisocyanate) Pittsburgh, PA CAS# 101-68-8 Isonate ™ 2143L Aromatic Diisocyanate Dow Chemical Corporation Midland, MI DBTDL Dibutyltin dilaurate Aldrich Chemical Company CAS# 77-58-7 Milwaukee, WI ESA Ethanesulfonic acid Aldrich Chemical Company (C2H5SO3H) CAS# Milwaukee, WI 594-45-6 Dytek ™ A 5-methyl-1,5-pentane- Aldrich Chemical Company diamine CAS# 15520- Milwaukee, WI 10-2 EDA Ethylene diamine Aldrich Chemical Company CAS# 107-15-3 Milwaukee, WI DMSSIP dimethyl-5-sodiosulfo- Aldrich Chemical isophthalate CAS# Company, (Milwaukee, 3965-55-7 WI) TBTN Tetrabutyl titanate Aldrich Chemical Company CAS# 5593-70-4 Milwaukee, WI

Facts

Application

09/626,812Filed 27 Jul 2000

Granted

18 Nov 2003

Term ended

27 Jul 2020

Estimated · how

20 years from earliest known nonprovisional domestic filing. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination. Patent term adjustment is unavailable; no adjustment was added.

Classification21 codes

C09J 175/04
Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers: polyurethanes
C08G 18/0828
Containing anionic or anionogenic groups: containing sulfonate groups or groups forming them
C08G 18/12
Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step: using…
C08G 18/4202
Polycondensates having carboxylic or carbonic ester groups in the main chain: two or more polyesters of different physical or chemical nature

Aqueous colloidal dispersions of sulfonated polyurethane ureas and products

Life of this patent

Aqueous colloidal dispersions of sulfonated polyurethane ureas and products

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims23

Description8,789 words

Drawings

Classification21 codes

Life of this patent

Description8,789 words