JPS5295798A - Nonnyellowing curable melamineeformaldehyde resin and preparation thereof - Google Patents
Nonnyellowing curable melamineeformaldehyde resin and preparation thereofInfo
- Publication number
- JPS5295798A JPS5295798A JP1033877A JP1033877A JPS5295798A JP S5295798 A JPS5295798 A JP S5295798A JP 1033877 A JP1033877 A JP 1033877A JP 1033877 A JP1033877 A JP 1033877A JP S5295798 A JPS5295798 A JP S5295798A
- Authority
- JP
- Japan
- Prior art keywords
- preparation
- nonnyellowing
- melamineeformaldehyde
- curable
- resin
- 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.)
- Pending
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.
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 (1)
Publication Number | Publication Date |
---|---|
JPS5295798A true JPS5295798A (en) | 1977-08-11 |
Family
ID=5968985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1033877A Pending JPS5295798A (en) | 1976-02-04 | 1977-02-03 | Nonnyellowing curable melamineeformaldehyde resin and preparation thereof |
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)
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)
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 |
-
1976
- 1976-02-04 DE DE2604195A patent/DE2604195C2/en not_active Expired
-
1977
- 1977-01-28 NO NO770291A patent/NO770291L/en unknown
- 1977-01-28 NL NL7700942A patent/NL7700942A/en not_active Application Discontinuation
- 1977-01-28 SE SE7700922A patent/SE419968B/en unknown
- 1977-02-03 AT AT69477A patent/AT355805B/en not_active IP Right Cessation
- 1977-02-03 IT IT19939/77A patent/IT1114852B/en active
- 1977-02-03 BE BE174643A patent/BE851065A/en not_active IP Right Cessation
- 1977-02-03 JP JP1033877A patent/JPS5295798A/en active Pending
- 1977-02-03 FR FR7702987A patent/FR2340335A1/en active Granted
- 1977-02-03 CH CH133077A patent/CH628653A5/en not_active IP Right Cessation
- 1977-02-03 GB GB4465/77A patent/GB1551884A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ATA69477A (en) | 1979-08-15 |
CH628653A5 (en) | 1982-03-15 |
GB1551884A (en) | 1979-09-05 |
DE2604195C2 (en) | 1984-03-08 |
IT1114852B (en) | 1986-01-27 |
DE2604195A1 (en) | 1977-08-11 |
NL7700942A (en) | 1977-08-08 |
FR2340335B1 (en) | 1979-08-24 |
SE7700922L (en) | 1977-08-05 |
BE851065A (en) | 1977-08-03 |
FR2340335A1 (en) | 1977-09-02 |
SE419968B (en) | 1981-09-07 |
NO770291L (en) | 1977-08-05 |
AT355805B (en) | 1980-03-25 |
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