ES418282A2 - Process for the preparation of polyurethane products - Google Patents

Process for the preparation of polyurethane products

Info

Publication number
ES418282A2
ES418282A2 ES418282A ES418282A ES418282A2 ES 418282 A2 ES418282 A2 ES 418282A2 ES 418282 A ES418282 A ES 418282A ES 418282 A ES418282 A ES 418282A ES 418282 A2 ES418282 A2 ES 418282A2
Authority
ES
Spain
Prior art keywords
molecular weight
formula
radical derived
see formula
low molecular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES418282A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of ES418282A2 publication Critical patent/ES418282A2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

Improvements introduced in the object of the main patent No. 397,480, applied for on November 29, 1971, by: "A process for the preparation of thermoplastic and elastic polyurethane products" represented by the following general formula: **(See formula)** where represents a group of general formula: **(See formula)** or a group of formula: **(See formula)** Q2 represents a urethane group (see formula) or a group of formula: **(See formula)** n represents an integer, preferably between 5 and 60; R1I and R1II represent radicals derived from low molecular weight di-isocyanates, which may be the same or different; R2I and R2II represent radicals derived from high molecular weight diols, which may be the same or different; R2III represents a radical derived from a low molecular weight diol; comprising reacting a di-isocyanate prepolymer of the formula: * I **(See formula)** where R1I represents a radical derived from a low molecular weight di-isocyanate and R2I represents a radical derived from a high molecular weight diol; it is reacted with a diol prepolymer of the formula: **(See formula)** where R1II represents a radical derived from a low molecular weight di-isocyanate, R2II represents a radical derived from a high molecular weight diol and R2III represents a radical derived from a low molecular weight diol; and where R2I and R2II can be the same or different; in a molecular weight ratio of about 1: 1, followed by gelation; characterized in that the gelation is carried out at a shear rate of between 100 and 10,000 sec-1. (Machine-translation by Google Translate, not legally binding)
ES418282A 1972-08-30 1973-08-28 Process for the preparation of polyurethane products Expired ES418282A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4015072A GB1373188A (en) 1972-08-30 1972-08-30 Process for the preparation of polyurethane products

Publications (1)

Publication Number Publication Date
ES418282A2 true ES418282A2 (en) 1976-05-01

Family

ID=10413429

Family Applications (1)

Application Number Title Priority Date Filing Date
ES418282A Expired ES418282A2 (en) 1972-08-30 1973-08-28 Process for the preparation of polyurethane products

Country Status (13)

Country Link
JP (1) JPS49100200A (en)
AT (1) AT342868B (en)
AU (1) AU476748B2 (en)
BE (1) BE803977R (en)
CA (1) CA1015891A (en)
CH (1) CH593307A5 (en)
DE (1) DE2343387A1 (en)
ES (1) ES418282A2 (en)
FR (1) FR2197926B2 (en)
GB (1) GB1373188A (en)
IT (1) IT1046351B (en)
NL (1) NL7311794A (en)
ZA (1) ZA735872B (en)

Also Published As

Publication number Publication date
DE2343387A1 (en) 1974-03-14
JPS49100200A (en) 1974-09-21
ATA748773A (en) 1977-08-15
AU5973473A (en) 1975-03-06
GB1373188A (en) 1974-11-06
FR2197926A2 (en) 1974-03-29
CA1015891A (en) 1977-08-16
FR2197926B2 (en) 1978-02-17
IT1046351B (en) 1980-06-30
CH593307A5 (en) 1977-11-30
BE803977R (en) 1974-02-25
ZA735872B (en) 1974-09-25
NL7311794A (en) 1974-03-04
AT342868B (en) 1978-04-25
AU476748B2 (en) 1976-09-30

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Legal Events

Date Code Title Description
FD2A Announcement of lapse in spain

Effective date: 20170704