摘要:
High molecular weight thermoplastic aromatic carbonate resin exhibiting improved impact properties comprised of the polymerized reaction products of:(i) at least one dihydric phenol;(ii) a carbonate precursor; and(iii) an amount effective to improve the impact properties of said resin of at least one polymer represented by the formula ##STR1## wherein A represents a divalent residue of at least one polymerized and partially hydrogenated conjugated alkadiene monomer and has a weight average molecular weight of at least about 600, and X is independently selected from halogen radicals.
摘要:
Novel fluoro-containing polyetherimides are prepared from bis ether dianhydrides, fluoro-containing dianhydrides, and organic diamines. The compolymers exhibit both increased Tg and increased solubility in halogenated solvents which enhances their value in a wide variety of uses including films, molding compounds, and coatings.
摘要:
Novel di(phthalic anhydride) derivatives of di(dialkylphenol) sulfones of the following formula are disclosed: ##STR1## These dianhydrides can be reacted with organic diamines to form novel polyetherimide polymers having particularly beneficial properties.
摘要:
Described herein is a curable resin composition comprising a homogeneous mixture of a hydroxyl-terminated unsaturated polyester oligomer, a polyisocyanate, an ethylenically unsaturated monomer, and a polyurethane forming catalyst.
摘要:
Polyetherimide resins which crystallize from the melt contain crystallizing repeating units based on biphenoldianhydride or hydroquinone dianhydride and a linear aromatic diamine. The melt crystalline polyetherimides exhibit improved solvent resistance. The melt crystalline polymers retain the advantageous properties associated with their known amorphous polyetherimide counterparts.
摘要:
Copolymers are prepared by the interaction of a melt mix comprising a high molecular weight poly(alkylene arylate) resin with a high molecular weight polycarbonate or polyester carbonate and a catalyst, such as diphenyl phosphate. The copolymers are tough and are useful as molding compounds and are capable of maintaining dimensional stability at temperatures approaching their singale glass transition temperature. The copolymers are characterized by having substantially no content of polyester homopolymer and a ratio of arylate linkages to dihydric phenol arylate linkages of not substantially less than 20:1.
摘要:
Polymers of the formula: ##STR1## wherein X is selected from the group consisting of halogen, hydroxyl and alkoxy and n is an integer such that the polymer has a weight average molecular weight within the range of from 5,000 to 30,000 are useful to prepare a wide variety of block copolymer resins such as polycarbonate - polyisobutylene block copolymer.
摘要:
The present invention relates to a wholly aromatic polyetherimide further containing sulfur containing groups in the backbone of the polyetherimide. The polyetherimide is characterized by extremely high glass transition temperatures, high chemical resistance and thermogravimetric stability.
摘要:
New heat resistant, thermoplastic copoly)ester-carbonates) based on 3-methyl-4-hydroxy-benzoic acid are disclosed. The copolymers exhibit higher glass transition temperatures due to the presence of the 3-methyl substituent on the benzoate units of the polymer. They are useful in the preparation of thermoplastic engineering compositions for extrusion or molding into shaped articles.
摘要:
A thermoplastic composition includes compatible blends of a mixed polycarbonate comprising units derived from a first dihydric phenol, which is a bis(hydroxyaryl) sulfone, a second dihydric phenol; and one or more thermoplastic condensation polymers containing hetero groups.