# US 10,246,640 B2 · Mixtures of at least one dialkylphosphinic acid with at least one other dialkylphosphinic acid that is different therefrom, method for production thereof, and use thereof

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- Number: US 10,246,640 B2
- Document ID: US10246640B2
- Status: Granted
- Kind: B2
- Application number: 15/713,547
- Filed: 2017-09-22
- Published: 2018-01-11
- Granted: 2019-04-02
- Earliest claimed: 2011-12-21
- Assignees: Clariant International Ltd.
- Applicants: Clariant International Ltd.
- Inventors: Fabian Schneider; Frank Osterod; Harald Bauer; Martin Sicken
- Web page: https://patentgrep.com/patent/US10246640B2

## CPC

- C09K 21/12: containing phosphorus
- C07F 9/30: Phosphinic acids [R2P(=O)(OH)]; Thiophosphinic acids {; [R2P(=X1)(X2H) (X1, X2 are each independently O, S or Se)]}
- C07F 9/301: {Acyclic saturated acids which can have further substituents on alkyl}
- C08G 59/1488: {containing phosphorus}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Mixtures of at least one dialkylphosphinic acid with at least one other dialkylphosphinic acid that is different therefrom, method for production thereof, and use thereof. The invention relates to a mixture of at least one dialkylphosphinic acid of the formula (I) in which R1, R2 are the same or different and are each C1-C18-alkyl, C2-C18-alkenyl, C6-C18-aryl, C7-C18-alkylaryl, with at least one different dialkylphosphinic acid of the formula (II) in which R3, R4 are the same or different and are each C1-C18-alkyl, C2-C18-alkenyl, C6-C18-aryl and/or C7-C18-alkylaryl, with the proviso that at least one of the R3 and R4 radicals is different than R1 and R2.

## Claims

### Claim 1

A flame-retardant thermoset composition or, film, comprising 0.5 to 45% by weight of a mixture of at least one dialkylphosphinic acid of the formula (I)
wherein
R1, R2 are the same or different and are C1-C18-alkyl, C2-C18-alkenyl, C6-C18-aryl or C7-C18-alkylaryl,
with at least one different dialkylphosphinic acid of the formula (II)
wherein
R3, R4 are the same or different and are C1-C18-alkyl, C2-C18-alkenyl, C6-C18-aryl or C7-C18-alkylaryl,
with the proviso that at least one of the R3 and R4 radicals is different than R1 and R2, 0.5 to 99.5% by weight of thermoset polymer, 0 to 55% by weight of additives and 0 to 55% by weight of filler or a reinforcing material, where the sum of the components is 100% by weight.

### Claim 2

A flame-retardant thermoset composition or film, comprising 1 to 30% by weight of a mixture of at least one dialkylphosphinic acid of the formula (I)
wherein
R1, R2 are the same or different and are C1-C18-alkyl, C2-C18-alkenyl, C6-C18-aryl or C7-C18-alkylaryl,
with at least one different dialkylphosphinic acid of the formula (II)
wherein
R3, R4 are the same or different and are C1-C18-alkyl, C2-C18-alkenyl, C6-C18-aryl or C7-C18-alkylaryl,
with the proviso that at least one of the R3 and R4 radicals is different than R1 and R2, 10 to 95% by weight of thermoset polymer, 2 to 30% by weight of additives and 2 to 30% by weight of filler or a reinforcing material, where the sum of the components is 100% by weight.