GB1402117A - Process for the preparation of polyesters - Google Patents

Process for the preparation of polyesters

Info

Publication number
GB1402117A
GB1402117A GB4136172A GB4136172A GB1402117A GB 1402117 A GB1402117 A GB 1402117A GB 4136172 A GB4136172 A GB 4136172A GB 4136172 A GB4136172 A GB 4136172A GB 1402117 A GB1402117 A GB 1402117A
Authority
GB
United Kingdom
Prior art keywords
adipic acid
polyesters
sept
reacting
prepared
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
GB4136172A
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
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB1402117A publication Critical patent/GB1402117A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

1402117 Polyesters prepared from cyclic acetals or ketals BAYER AG 6 Sept 1972 [8 Sept 1971] 41361/72 Heading C3R [Also in Division C2] A polyester having a hydroxyl number of less than 10 is prepared by reacting a compound which contains two carbonyl groups, or an anhydride thereof, with a cyclic acetal or ketal of a diol. The process may be carried out in the presence of a catalyst, e.g. p-toluenesulphonic acid. The examples describe reacting (1) 1,4- dioxaspiro-4,5-decane with (a) adipic acid, (b) polyesters containing two carbonyl groups derived from (i) adipic acid and ethylene glycol and (ii) adipic acid and hexanediol optionally with neopentyl glycol, and (c) polycaprolactone containing two carboxyl groups derived from caprolactone and adipic acid, and (2) with phthalic anhydride.
GB4136172A 1964-04-23 1972-09-06 Process for the preparation of polyesters Expired GB1402117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6404446A NL6404446A (en) 1964-04-23 1964-04-23

Publications (1)

Publication Number Publication Date
GB1402117A true GB1402117A (en) 1975-08-06

Family

ID=19789899

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1652965A Expired GB1042117A (en) 1964-04-23 1965-04-20 Improvements in or relating to adjustable connection devices between the coiled end of a helical spring and a body
GB4136172A Expired GB1402117A (en) 1964-04-23 1972-09-06 Process for the preparation of polyesters

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1652965A Expired GB1042117A (en) 1964-04-23 1965-04-20 Improvements in or relating to adjustable connection devices between the coiled end of a helical spring and a body

Country Status (2)

Country Link
GB (2) GB1042117A (en)
NL (1) NL6404446A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000088023A (en) * 1998-09-10 2000-03-28 Toyota Autom Loom Works Ltd Spring end locating structure and compressor equipped with such locating structure

Also Published As

Publication number Publication date
GB1042117A (en) 1966-09-07
NL6404446A (en) 1965-10-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee