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US5124425A Expired / Lapsed US ⏱️ 0.0 years remaining

Curable polyurethane composition excellent in flexibility

Assignee: AGC Inc
•
Filing: 1990-05-02
•
Granted: 1992-06-23
•
Expires: 2010-05-02
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Abstract

Abstract PCT No. PCT/JP90/00578 Sec. 371 Date Jan. 9, 1991 Sec. 102(e) Date Jan. 9, 1991 PCT Filed May 2, 1990 PCT Pub. No. WO90/13586 PCT Pub. Date Nov. 15, 1990.The present invention is a room temperature curable polyurethane composition comprising as a curable component a polyurethane prepolymer having terminal isocyanate groups obtained by reacting an organic polyisocyanate and a polyol comprising as the main component a polyoxyalkylenepolyol having a molecular weight per hydroxyl group of from 1,500 to 15,000 and a total unsaturation degree of at most 0.07 meq/g. The above polyoxyalkylenepolyol having a molecular weight per hydroxyl group of from 1,500 to 15,000 and a total unsaturation degree of at most 0.07 meq/g, is produced by ring-opening addition polymerizing an alkylene oxide to an initiator, preferably by means of a double metal cyanide complex catalyst. By curing this curable polyurethane composition by moisture in air, a highly flexible cured product will be obtained. Further, by curing this curable polyurethane composition wherein a high molecular weight polyoxyalkylenepolyol is used as a curing agent, a highly flexible similar cured product is obtainable. This curable polyurethane composition is useful as sealing materials or water-proof materials.

Inventors

  • 👤 Toshihiko Higuchi
  • 👤 Sigeyuki Kozawa
  • 👤 Nobuaki Kunji

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 11:45
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/4866; C08G2190/00

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 56 words
A room temperature curable polyurethane composition comprising as a curable component a polyurethane prepolymer having terminal isocyanate groups obtained by reacting an organic polyisocyanate and a polyol comprising as the main component a polyoxyalkylenepolyol having a molecular weight per hydroxyl group of from 1,500 to 15,000 and a total unsaturation degree of at most 0.07 meq/g.
Claim 2
Dependent Claim 56 words
A room temperature curable polyurethane composition comprising as a curable component a polyurethane prepolymer having terminal isocyanate groups obtained by reacting an organic polyisocyanate and a polyol comprising as the main component a polyoxyalkylenepolyol having a molecular weight per hydroxyl group of from 1,500 to 15,000 and a total unsaturation degree of at most 0.07 meq/g.
Claim 3
Dependent Claim 31 words
The composition according to claim 1, wherein the polyoxyalkylenepolyol has a molecular weight per hydroxyl group of from 2,000 to 15,000 and a total unsaturation degree of at most 0.04 meq/g.
Claim 4
Dependent Claim 16 words
The composition according to claim 1, wherein the polyoxyalkylenepolyol has from 3 to 8 hydroxyl groups.
Claim 5
Dependent Claim 23 words
The composition according to claim 1, wherein the polyoxyalkylenepolyol is a polyoxypropylenepolyol having an oxypropylene group content of at least 70% by weight.
Claim 6
Dependent Claim 18 words
A moisture-curable sealing or waterproof material comprising a room temperature curable polyurethane composition as defined in claim 1.
Claim 7
Dependent Claim 63 words
A room temperature curable polyurethane composition comprising as a curable component a combination of a polyurethane prepolymer having terminal isocyanate groups obtained by reacting an organic polyisocyanate and a polyol comprising as the main component a polyoxyalkylenepolyol having a molecular weight per hydroxyl group of from 1,500 to 15,000 and a total unsaturation degree of at most 0.07 meq/g, and a second polyoxyalkylenepolyol.
Claim 8
Dependent Claim 63 words
A room temperature curable polyurethane composition comprising as a curable component a combination of a polyurethane prepolymer having terminal isocyanate groups obtained by reacting an organic polyisocyanate and a polyol comprising as the main component a polyoxyalkylenepolyol having a molecular weight per hydroxyl group of from 1,500 to 15,000 and a total unsaturation degree of at most 0.07 meq/g, and a second polyoxyalkylenepolyol.
Claim 9
Dependent Claim 31 words
The composition according to claim 6, wherein the polyoxyalkylenepolyol has a molecular weight per hydroxyl group of from 2,000 to 15,000 and a total unsaturation degree of at most 0.04 meq/g.
Claim 10
Dependent Claim 16 words
The composition according to claim 6, wherein the polyoxyalkylenepolyol has from 3 to 8 hydroxyl groups.
Claim 11
Dependent Claim 23 words
The composition according to claim 6, wherein the polyoxyalkylenepolyol is a polyoxypropylenepolyol having an oxypropylene group content of at least 70% by weight.
Claim 12
Dependent Claim 35 words
The composition according to claim 6, wherein the second polyoxyalkylenepolyol is a polyoxyalkylenepolyol having a molecular weight per hydroxyl group of from 1,500 to 15,000 and a total unsaturation degree of at most 0.07 meq/g.

References Cited (Backward Citations)

JPS5220441B1 Cited
JPS5765718A Cited
JPS5776028A Cited
US4721818A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-06-23 1995-12-23 1996-06-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-06-23 1999-12-23 2000-06-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-06-23 2003-12-23 2004-06-23 $7700.00 Window Closed / Lapsed

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