GB631365A - Improvements in or relating to the production of transparent synthetic resins - Google Patents
Improvements in or relating to the production of transparent synthetic resinsInfo
- Publication number
- GB631365A GB631365A GB1480547A GB1480547A GB631365A GB 631365 A GB631365 A GB 631365A GB 1480547 A GB1480547 A GB 1480547A GB 1480547 A GB1480547 A GB 1480547A GB 631365 A GB631365 A GB 631365A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diurea
- urea
- dithiourea
- ethylene
- triureido
- 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
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
- C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
- C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Transparent artificial resins are obtained by condensing an aldehyde, urea (and/or thiourea), and up to 50 mol. per cent (based on the total urea or thiourea in the reaction mixture) of one or more polyfunctional urea derivatives of the formula (H2N.CX.NH)nR, where R is a di- or bi-valent hydrocarbon radical, X is an oxygen or sulphur atom and n is 2 or 3. The polyfunctional urea derivatives may be added to an initial urea and/or thiourea condensate which is then condensed further. The radical R may be derived from ethane, isoprene, butane, cetane, decane, ethylene, butene, octene, decene, benzene, cyclohexane, toluene, 2 : 5-dimethyl-cyclohexane, cyclopentane, cyclohexene, or cyclopentene. Urea-derivatives specified are 1,4-butylene diurea, 1,3-pentylene diurea, 1,4,6-triureido hexane, 1,2-phenylene diurea, 1,5,7-triureido decane, 2,4-pentylene diurea, 2,6-heptylene diurea, 1,4-butylene dithiourea, 1,3- or 1,5-naphthylene dithiourea, 1,3-heptylene diurea, 1,2,4-triureido naphthalene, 1,5-heptylene dithiourea, ethylene diurea, 1,3,5-triureido heptane, 1,3-octylene diurea, 1,5-decylene diurea, 2,4-pentylene dithiourea, ethylene dithiourea, 1,3,5-trithioureido heptane. Suitable aldehydes include formaldehyde, acetaldehyde, propion-aldehyde, 2-pentenal, 2-butyraldehyde, 2,4-pentanediol, caproaldehyde, valeraldehyde, crotonaldehyde, 2 - furaldehyde, octanal, heptanal. The reaction may be performed in solution in water, alcohols, toluene, dioxane, hexane. Suitable catalysts for the condensation are alkali or alkaline earth metal hydroxides, oxides, alkali metal alcoholates, or quaternary ammonium bases, and for the polymerization, hydrochloric, sulphuric, acetic, lactic, or peracetic acid, to bring the pH to 4 to 6.5. Plasticizers such as glycerol may be added. In examples: (1) urea, formaldehyde, and caustic soda are reacted at room temperature, the product acidified with lactic acid, then heated with ethylene diurea, allowed to stand, and dehydrated. The product is cast and cured at 70 DEG C.; (2) urea, ethylene diurea, formaldehyde, and caustic soda are reacted together, the product acidified with lactic acid, heated, and then part of the water removed under alkaline conditions and the remainder under acid conditions, the resin finally being cast and cured at 70 DEG C. Specification 506,507 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1480547A GB631365A (en) | 1947-06-04 | 1947-06-04 | Improvements in or relating to the production of transparent synthetic resins |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1480547A GB631365A (en) | 1947-06-04 | 1947-06-04 | Improvements in or relating to the production of transparent synthetic resins |
Publications (1)
Publication Number | Publication Date |
---|---|
GB631365A true GB631365A (en) | 1949-11-01 |
Family
ID=10047780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1480547A Expired GB631365A (en) | 1947-06-04 | 1947-06-04 | Improvements in or relating to the production of transparent synthetic resins |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB631365A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0002794A1 (en) * | 1977-12-22 | 1979-07-11 | BASF Aktiengesellschaft | Method of preparing soft and brittle resins from urea or its derivatives, formaldehyde and a CH-acid aldehyde and their use in paint compositions |
-
1947
- 1947-06-04 GB GB1480547A patent/GB631365A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0002794A1 (en) * | 1977-12-22 | 1979-07-11 | BASF Aktiengesellschaft | Method of preparing soft and brittle resins from urea or its derivatives, formaldehyde and a CH-acid aldehyde and their use in paint compositions |
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