Linear saturated polyesters of phosphoric acid and halogenated diols as flame-retardant additives and coatings
US4259222A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1978 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Aug 16, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M15/667
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides new linear phosphorus- and halogen-containing flame retardant polyester additives for normally flammable polymers and coatings for normally flammable natural and synthetic films and fibers, for instance, polyester and cellulose ester films and fibers. The phosphorus- and halogen-containing polymers of the invention are water dispersible or can be rendered water-soluble. They can be prepared by reacting a phosphorus acid reactant such as phosphoric acid with at least one halogenated difunctional monomer. The water-soluble polyesters can be cross-linked to render them insoluble in water by heating together with a methylol compound. Said halogenated monomer is preferably an oxyalkylated diacid or diol and said halogen is attached either on one or more aromatic rings or on a cycloaliphatic ring. The halogenated diols useful in preparing the flame-retardant polymer additives of the invention are selected from the group consisting of at least one of the halogenated, saturated diols having the formula: ##STR1## wherein m and p are integers of 2 to 6; n and q in formulas A, C, and D are 0 or integers of 1 to 10 and integers of 1-10 in formula B; wherein in fo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.