Flameproof linear polyester, a process for its preparation, and

Details Flameproof linear polyester, a process for its preparation, and Flameproof linear polyester, a process for its preparation, and

1983-04-20

1985-05-14

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528275, C08G 6368, C08G 7902

Patent

active

045173559

ABSTRACT:
A flameproof linear polyester is described containing, copolymerized in the molecule, a phosphorus compound of formula: ##STR1## where R is a hydrogen atom, an alkyl group with 1 to 4 carbon atoms or a hydroxyalkyl group, and R' is a hydrogen atom, a hydroxyalkyl group or the group --(CH.sub.2 CH.sub.2 O).sub.n H, where n varies from 1 to 4. Said linear polyester is prepared by firstly forming a low molecular weight precondensate from a dicarboxylic aromatic acid (or a relative lower alkyl diester) and an alkylene glycol, and then polycondensing in the presence of said phosphorus compound, in such a quantity as to obtain a content of phosphorus (expressed as the metal) in the linear polyester of between 0.4 and 0.8% by weight. The linear polyester thus obtained can be formed into articles such as fibres, film, sheets and other articles which, besides being flameproof, possess improved dyeing characteristics. A process is also described for preparing the phosphorus compounds corresponding to the aforesaid general formula, where R is hydrogen or an alkyl group containing 1 to 4 carbon atoms, and R' is hydrogen. Said phosphorus compounds are prepared by reacting phenylphosphinic acid or ester with paraformaldehyde, at a temperature of between 60.degree. and 150.degree. C.

REFERENCES:
patent: Re30783 (1981-10-01), Kleiner et al.
patent: 4033936 (1977-07-01), Bollert et al.
patent: 4169935 (1979-10-01), Hoheisel et al.
patent: 4214069 (1980-07-01), Couchoud et al.

Affiliated with

Also associated with

Rating

Flameproof linear polyester, a process for its preparation, and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flameproof linear polyester, a process for its preparation, and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flameproof linear polyester, a process for its preparation, and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-769322