GB875560A - Improvements in the stabilisation of high molecular weight polyformaldehyde - Google Patents
Improvements in the stabilisation of high molecular weight polyformaldehydeInfo
- Publication number
- GB875560A GB875560A GB20645/60A GB2064560A GB875560A GB 875560 A GB875560 A GB 875560A GB 20645/60 A GB20645/60 A GB 20645/60A GB 2064560 A GB2064560 A GB 2064560A GB 875560 A GB875560 A GB 875560A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isocyanate
- polyformaldehyde
- molecular weight
- high molecular
- cresol
- 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
- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
- C08G2/30—Chemical modification by after-treatment
-
- 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
- C08G18/56—Polyacetals
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
High molecular weight polyformaldehyde is stabilized against thermal degradation by reaction with an isocyanate. Specified isocyanates are phenyl isocyanate, hexamethylene diisocyanate, toluylene-2, 4-di-isocyanate, phenylene-1, 4-di-isocyanate, naphthylene-1, 5-isocyanate, dicyclo-hexylmethane 4, 41-di-isocyanate, and triphenyl-methane-4, 41, 411-tri-isocyanate. The polyformaldehyde may be swollen with a hydroxylfree solvent before reaction with the iso-cyanate, e.g. formamide methyl or dimethylformamide, dimethyl-sulphoxide, dimethyl sulphone and butyrolactone. The product may be subsequently heated with a mono- or poly-hydric phenol, e.g. phenol, p-cresol, 2, 6-di-t-butyl-p-cresol, butylated hydroxy-anisol, hydroxytolyl-camphane and di-(p-t-butylphenol)-mono or disulphide amongst others.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE875560X | 1959-06-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB875560A true GB875560A (en) | 1961-08-23 |
Family
ID=6817334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20645/60A Expired GB875560A (en) | 1959-06-13 | 1960-06-13 | Improvements in the stabilisation of high molecular weight polyformaldehyde |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB875560A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1569453B1 (en) * | 1963-03-25 | 1970-07-23 | Thiokol Chemical Corp | Thermoplastic polysulphide molding compounds stabilized against thermal degradation |
CN110643006A (en) * | 2019-09-24 | 2020-01-03 | 开滦能源化工股份有限公司 | High-melt-strength copolyformaldehyde and preparation method thereof |
-
1960
- 1960-06-13 GB GB20645/60A patent/GB875560A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1569453B1 (en) * | 1963-03-25 | 1970-07-23 | Thiokol Chemical Corp | Thermoplastic polysulphide molding compounds stabilized against thermal degradation |
CN110643006A (en) * | 2019-09-24 | 2020-01-03 | 开滦能源化工股份有限公司 | High-melt-strength copolyformaldehyde and preparation method thereof |
CN110643006B (en) * | 2019-09-24 | 2022-07-26 | 开滦能源化工股份有限公司 | High-melt-strength copolyformaldehyde and preparation method thereof |
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