FR2340335B1 - - Google Patents

Info

Publication number
FR2340335B1
FR2340335B1 FR7702987A FR7702987A FR2340335B1 FR 2340335 B1 FR2340335 B1 FR 2340335B1 FR 7702987 A FR7702987 A FR 7702987A FR 7702987 A FR7702987 A FR 7702987A FR 2340335 B1 FR2340335 B1 FR 2340335B1
Authority
FR
France
Prior art keywords
water
resins
formaldehyde
yellowing
laminates
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
FR7702987A
Other languages
French (fr)
Other versions
FR2340335A1 (en
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.)
Cassella Farbwerke Mainkur AG
Original Assignee
Cassella Farbwerke Mainkur 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 Cassella Farbwerke Mainkur AG filed Critical Cassella Farbwerke Mainkur AG
Publication of FR2340335A1 publication Critical patent/FR2340335A1/en
Application granted granted Critical
Publication of FR2340335B1 publication Critical patent/FR2340335B1/fr
Granted 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
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C08G12/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with substituted triazines
    • C08G12/32—Melamines
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/13—Amines
    • A61K31/155—Amidines (), e.g. guanidine (H2N—C(=NH)—NH2), isourea (N=C(OH)—NH2), isothiourea (—N=C(SH)—NH2)
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/34—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Laminated Bodies (AREA)

Abstract

Melamine and formaldehyde are reacted in a molar ratio of from 1:1 to 1:3.5 at 70-120 DEG C. Aqueous formaldehyde containing no basic substances and at most 0.03% by weight of acid is used. The condensation is continued until a sample cooled to 20 DEG C is stable for a number of hours and produces cloudiness on dilution with 1.5 times the volume of water. The resins cured without yellowing exhibit no discolouration even after heating at 250 DEG C for 1 hour. Spray drying gives powder resins which are water-soluble and can be employed for the preparation of compression-moulding compositions and laminates.
FR7702987A 1976-02-04 1977-02-03 MELAMINE-FORMALDEHYDE RESINS CAPABLE OF CURING WITHOUT YELLOWING Granted FR2340335A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2604195A DE2604195C2 (en) 1976-02-04 1976-02-04 Process for the production of melamine-formaldehyde resins

Publications (2)

Publication Number Publication Date
FR2340335A1 FR2340335A1 (en) 1977-09-02
FR2340335B1 true FR2340335B1 (en) 1979-08-24

Family

ID=5968985

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7702987A Granted FR2340335A1 (en) 1976-02-04 1977-02-03 MELAMINE-FORMALDEHYDE RESINS CAPABLE OF CURING WITHOUT YELLOWING

Country Status (11)

Country Link
JP (1) JPS5295798A (en)
AT (1) AT355805B (en)
BE (1) BE851065A (en)
CH (1) CH628653A5 (en)
DE (1) DE2604195C2 (en)
FR (1) FR2340335A1 (en)
GB (1) GB1551884A (en)
IT (1) IT1114852B (en)
NL (1) NL7700942A (en)
NO (1) NO770291L (en)
SE (1) SE419968B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2388295A1 (en) 2010-05-21 2011-11-23 Wietec Technologie KG Method for producing a transparent plastic material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2260239A (en) * 1936-12-12 1941-10-21 Monsanto Chemicals Manufacture of melamine-aldehyde condensation products
DE1028335B (en) * 1956-12-01 1958-04-17 Sueddeutsche Kalkstickstoff Process for the production of melamine-formaldehyde resins
FR1216292A (en) * 1957-09-06 1960-04-25 Process for preparing aminoplasts of low electrical bending
FR1189530A (en) * 1958-01-06 1959-10-05 Sueddeutsche Kalkstickstoff Process for the preparation of melamine-formaldehyde resins

Also Published As

Publication number Publication date
GB1551884A (en) 1979-09-05
IT1114852B (en) 1986-01-27
AT355805B (en) 1980-03-25
FR2340335A1 (en) 1977-09-02
NO770291L (en) 1977-08-05
DE2604195A1 (en) 1977-08-11
CH628653A5 (en) 1982-03-15
JPS5295798A (en) 1977-08-11
ATA69477A (en) 1979-08-15
BE851065A (en) 1977-08-03
DE2604195C2 (en) 1984-03-08
SE419968B (en) 1981-09-07
NL7700942A (en) 1977-08-08
SE7700922L (en) 1977-08-05

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Legal Events

Date Code Title Description
CN Change in juridical nature
ST Notification of lapse