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US4334034A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for the preparation of polymerizable polyurethane elastomers

Assignee: BASF SE
•
Filing: 1981-02-05
•
Granted: 1982-06-08
•
Expires: 2001-02-05
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Abstract

Abstract A process for the preparation of polymerizable, primarily linear thermoplastic polyurethane elastomers with acrylate side groups comprising reacting an organic polyisocyanate with a mixture of (a) an acrylate diol having a molecular weight of 146 to 3000, (b) an organic polyhydroxyl compound other than those of paragraph (a) having a molecular weight between 400 and 5000, and (c) a chain extender selected from the group consisting of diols, diamines, aminoalcohols, and triols, having molecular weights between 61 and 400, water, and mixtures thereof wherein the ratio of isocyanate to active hydrogen containing groups is from 0.8:1 to 1.2:1 and wherein 1.4 to 1.8 moles of organic polyisocyante, 0 to 15 moles of component (c) and 0.3 to 6 moles of component (a) are used per mole of component (b). The polymerizable polyurethane elastomers may be used for the manufacture of molded parts, laminates, adhesives, coatings, magnetic tapes, and other articles.

Inventors

  • 👤 August Lehner
  • 👤 Heinrich Hartmann
  • 👤 Guenter Heil
  • 👤 Werner Lenz
  • 👤 Ingolf Buethe
  • 👤 Rudolf Bachmann

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 07:26
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/6705; C08G18/675

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 130 words
A process for the preparation of polymerizable, primarily linear thermoplastic polyurethane elastomers with acrylate side groups comprising reacting an organic polyisocyanate with a mixture of (a) an acrylate diol having a molecular weight of 146 to 3000, (b) an organic polyhydroxyl compound other than those of paragraph (a) having a molecular weight between 400 and 5000, and (c) a chain extender selected from the group consisting of diols, diamines, aminoalcohols, and triols, having a molecular weight between 61 and 400, water, and mixtures thereof wherein the ratio of isocyanate to active hydrogen containing groups is from 0.8:1 to 1.2:1 and wherein 1.4 to 1.8 moles of organic polyisocyanate, 0 to 15 moles of component (c) and 0.3 to 6 moles of component (a) are used per mole of component (b).
Claim 2
Dependent Claim 130 words
A process for the preparation of polymerizable, primarily linear thermoplastic polyurethane elastomers with acrylate side groups comprising reacting an organic polyisocyanate with a mixture of (a) an acrylate diol having a molecular weight of 146 to 3000, (b) an organic polyhydroxyl compound other than those of paragraph (a) having a molecular weight between 400 and 5000, and (c) a chain extender selected from the group consisting of diols, diamines, aminoalcohols, and triols, having a molecular weight between 61 and 400, water, and mixtures thereof wherein the ratio of isocyanate to active hydrogen containing groups is from 0.8:1 to 1.2:1 and wherein 1.4 to 1.8 moles of organic polyisocyanate, 0 to 15 moles of component (c) and 0.3 to 6 moles of component (a) are used per mole of component (b).
Claim 3
Dependent Claim 41 words
The process of claim 1 wherein the polyurethane elastomer is produced by reacting the organic polyisocyanate with the mixture of components (a), (b) and (c) such that the ratio of isocyanate groups to active hydrogen atoms is from 0.95:1 to 1.15:1.
Claim 4
Dependent Claim 28 words
The process of claim 1 wherein 6 to 50 percent by weight of carbon to carbon double bond containing mono- or polymers are added to the polyurethane elastomer.
Claim 5
Dependent Claim 28 words
The process of claim 2 wherein 6 to 50 percent by weight of carbon to carbon double bond containing mono- or polymers are added to the polyurethane elastomer.
Claim 6
Dependent Claim 15 words
The process of claim 1 wherein the polyurethane elastomer is cured by heating or irradiation.
Claim 7
Dependent Claim 14 words
The process of claim 3 wherein the product is cured by heating or irradiation.
Claim 8
Dependent Claim 15 words
A polyurethane elastomer prepared in accordance with claims 1, 2, 3, 4, 5, or 6.

References Cited (Backward Citations)

US3478126A Cited
US3876726A Cited
US4182830A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-06-07 1985-12-07 1986-06-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-06-07 1989-12-07 1990-06-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-06-07 1993-12-07 1994-06-08 $7700.00 Window Closed / Lapsed

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