Polyester yarn

Details Polyester yarn Polyester yarn

1993-03-11

1994-06-21

Tentoni, Leo B.

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

Synthetic resins

From carboxylic acid or derivative thereof

528302, 5283081, 5283083, 5283086, 5283087, 5283088, D01F 662, C08G 6300

Patent

active

053229215

ABSTRACT:
The method for producing dimensionally stable, low-shrinkage, chemically modified industrial polyester yarns by melt spinning at speeds of 1000 to 4000 m/min. utilizes a copolymer containing at least 85 percent by weight polyethylene terephthalate units and comonomers. During polyester production to lower the thermal shrinkage one or more conformationally fixed linear difunctional comonomers are added to the polymer melt. These difunctional comonomers have the general formula, X'--R--X, where R is an unsaturated linear alkyl group having from three to ten carbon atoms or a cycloalkyl or aromatic group with 6 or more carbon atoms, and X and X' are, independently, OR' or COOR", and R'=H or an alkyl group and, independently, R" is also H or an alkyl group.

REFERENCES:
patent: 3576773 (1971-04-01), Vaginay
patent: 3991013 (1976-11-01), Pletcher
patent: 4067852 (1978-10-01), Calundann
patent: 4070432 (1978-01-01), Tamaddon
patent: 4092299 (1978-05-01), MacLean et al.
patent: 4113704 (1978-09-01), MacLean et al.

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