GB581146A - Curing of polymeric materials - Google Patents
Curing of polymeric materialsInfo
- Publication number
- GB581146A GB581146A GB1029043A GB1029043A GB581146A GB 581146 A GB581146 A GB 581146A GB 1029043 A GB1029043 A GB 1029043A GB 1029043 A GB1029043 A GB 1029043A GB 581146 A GB581146 A GB 581146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- phenol
- formaldehyde
- diphenylolpropane
- dimethylolurea
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/60—Polyamides or polyester-amides
- C08G18/606—Polyester-amides
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/83—Chemically modified polymers
- C08G18/86—Chemically modified polymers by peroxides
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Organic diisocyanate modified polyesteramides are cured by heating with a dichromate in presence or absence of an acid, an acid anhydride, an acid reacting salt or a substantially neutral material which developes acidity only under curing conditions and/or an acid accepting material. A chromate and an acidic material may be used instead of the dichromate. Fillers specified are carbon black, clay, asbestos, blanc fixe and mica; other plastic materials, for example, synthetic rubbers, vulcanized vegetable oils, dark substitute, white substitute, wood rosin, and pitch; detackifying agents, for example, stearic acid, paraffin wax, oleic acid and lauric acid; plasticisers, for example, tricresyl phosphate, dibutyl phthalate, butylphthalyl butyl glycollate and N-alkyltoluene-sulphonamides; stabilisers or anti-oxidants, for example, hydroquinone, N : N1-hexamethylene-bis-o-hydroxybenzamide, N-phenyl-a-naphthylamine, N-phenyl-naphthylamine and N : N1 - bis - (2 - hydroxy - 3 : 5 - dimethylphenyl) butane. Small quantities of pigments, for example from 1-3 per cent by weight, such as are customarily used in rubber technology, may also be used to impart c colour. Formaldehyde-liberating substances may also be used, for example paraformaldehyde, compounds containing a reactive methylol group or groups such as dimethylolurea, trimethylolmelamine, hexamethylolmelamine, diphenylolpropane tetra-alcohol, methylolchloracetamide, methylolstearamide, and N-methylol-p-toluene-sulphonamide, ethers of compounds containing a reactive methylol group or groups such as dimethylolurea dimethylether, dimethylolurea dibutyl ether, hexamethylolmelamine hexamethyl ether and N : D1-dimethyloluron dimethylether, 1 : 2-glycol methylene ether, di-(b -hydroxyethyl) formal, hexamethylene tetramine-zinc chloride complexes, thermo-hardening phenol-formaldehyde condensation products derived by alkaline condensation from phenols with more than two free positions ortho and para to the phenolic hydroxyl group, for example, phenol, m-cresol, diphenylolpropane, 1 : 3 : 5-xylenol, or mixtures containing at least one such phenol, for example, cresylic acid containing 50 per cent by weight of m-cresol, or the products obtained by condensing such phenol-formaldehyde condensation products with monohydric alcohols boiling above 80 DEG C., for example, n-butanol. The ingredients are milled at below 70 DEG C., the acidic material being added last, curing is effected at 100-150 DEG C. and the mix may be shaped or calendered on to a substrate. In examples, the organic diisocyanate modified polyester-amide obtained as described in example 1 of Specification 580,524, is mixed, milled and heated to 141 DEG C. with the following ingredients: (1) carbon black, stearic acid, ammonium dichromate, dibutyl phthalate, and 1-bromo-2-naphthol; (2) as in (1) with the addition of litharge and zinc stearate; (3) carbon black, stearic acid, potassium chromate, barium and lead chromate pigments, and chloranil. Diphenylolpropane tetra-alcohol is prepared by reacting diphenylol-propane with formaldehyde in presence of alkali. Specifications 580,526 and 581,143 also are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1029043A GB581146A (en) | 1943-06-25 | 1943-06-25 | Curing of polymeric materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1029043A GB581146A (en) | 1943-06-25 | 1943-06-25 | Curing of polymeric materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB581146A true GB581146A (en) | 1946-10-02 |
Family
ID=9965144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1029043A Expired GB581146A (en) | 1943-06-25 | 1943-06-25 | Curing of polymeric materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB581146A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2861972A (en) * | 1953-06-03 | 1958-11-25 | Bayer Ag | High molecular weight cross-linked polyester-urethane elastomer products |
-
1943
- 1943-06-25 GB GB1029043A patent/GB581146A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2861972A (en) * | 1953-06-03 | 1958-11-25 | Bayer Ag | High molecular weight cross-linked polyester-urethane elastomer products |
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