ES441584A1 - Low-viscosity unsaturated polyester compositions hardening with minimal shrinkage - Google Patents

Low-viscosity unsaturated polyester compositions hardening with minimal shrinkage

Info

Publication number
ES441584A1
ES441584A1 ES441584A ES441584A ES441584A1 ES 441584 A1 ES441584 A1 ES 441584A1 ES 441584 A ES441584 A ES 441584A ES 441584 A ES441584 A ES 441584A ES 441584 A1 ES441584 A1 ES 441584A1
Authority
ES
Spain
Prior art keywords
stage
polyester
ester
unsaturated polyester
low
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
ES441584A
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.)
Bayer AG
Original Assignee
Bayer AG
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
Priority claimed from DE19742449390 external-priority patent/DE2449390A1/en
Application filed by Bayer AG filed Critical Bayer AG
Publication of ES441584A1 publication Critical patent/ES441584A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/06—Unsaturated polyesters

Abstract

Process for obtaining low viscosity and curable doughs with little loss, characterized in that in a first stage, α, β-ethylenically unsaturated acids, or ester-forming derivatives thereof, are heated with divalent alcohols, slowly at about 180ºC ; in a second stage, the dissociated condensation water is removed by entrainment with a stream of inert gas; in a third stage, it is stabilized with hydroquinone or another stabilizer; in a fourth step, the obtained polyester and a cellulosic ester, free of oxidation agents, of aliphatic monocarboxylic acids, with OH indexes between 5 and 25, are dissolved in an olefinically unsaturated compound, copolymerizable with the obtained unsaturated polyester, preferably at 80ºC, the amount of the cellulose ester should amount to 5-30% by weight, based on the sum of the polyester, copolymerizable compound and cellulose ester. (Machine-translation by Google Translate, not legally binding)
ES441584A 1974-10-09 1975-10-08 Low-viscosity unsaturated polyester compositions hardening with minimal shrinkage Expired ES441584A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2448064 1974-10-09
DE19742449390 DE2449390A1 (en) 1974-10-17 1974-10-17 Curable polyester materials for impregnating fibrous sheets - containing unsat polyester unsat comonomer and cellulose- monocarboxylic acid ester

Publications (1)

Publication Number Publication Date
ES441584A1 true ES441584A1 (en) 1977-11-01

Family

ID=25767795

Family Applications (1)

Application Number Title Priority Date Filing Date
ES441584A Expired ES441584A1 (en) 1974-10-09 1975-10-08 Low-viscosity unsaturated polyester compositions hardening with minimal shrinkage

Country Status (7)

Country Link
JP (1) JPS5163890A (en)
DK (1) DK453875A (en)
ES (1) ES441584A1 (en)
FR (1) FR2287480A1 (en)
GB (1) GB1472367A (en)
NL (1) NL7511512A (en)
SE (1) SE7511269L (en)

Also Published As

Publication number Publication date
DK453875A (en) 1976-04-10
NL7511512A (en) 1976-04-13
GB1472367A (en) 1977-05-04
SE7511269L (en) 1976-04-12
JPS5163890A (en) 1976-06-02
FR2287480A1 (en) 1976-05-07

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