Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1992-04-28
1994-03-29
Seccuro, Jr., Carman J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
525210, 525211, 525 75, 524423, 524399, 524317, 524312, 524311, 524306, C08L 4500, C08L 2706
Patent
active
052985512
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to vinyl chloride resin compositions, and particularly to vinyl chloride resin compositions having an elevated heat distortion (deflection) temperature by incorporation of a cycloolefin polymer thereinto to improve the properties of the molded articles.
BACKGROUND OF THE INVENTION
Vinyl chloride resins such as polyvinyl chloride, copolymers of vinyl chloride and other monomers, or vinyl chloride resin derivatives, for example, halogenated polyvinyl chloride (these resins being merely referred to vinyl chloride resins hereinafter) have excellent scratch resistance, flame retarding properties, chemical resistance and electric characteristics, and show a decreased mold shrinkage factor. Vinyl chloride resins are therefore used as material for various molded articles. Molded articles made of vinyl chloride resins are used under such peculiar circumstances as water tanks of electric irons, electronic oven parts, printed circuit boards, conductive sheets and helmets.
However, conventional vinyl chloride resins have a problem that molded products obtained therefrom are restricted in their use due to their low heat distortion temperature, although they are excellent in flame retarding properties, chemical resistance, a low mold shrinkage factor, etc.
An object of the present invention is to provide vinyl chloride resin compositions having an elevated heat distortion (deflection) temperature or an elevated heat deformation temperature while excellent properties of conventional vinyl chloride resin compositions, such as flame retarding properties and a low mold shrinkage factor, are maintained.
DISCLOSURE OF THE INVENTION
A vinyl chloride resin composition according to the present invention comprises opening polymerization of a cycloolefin represented by the following formula [I], or a hydrogenated product thereof, and/or represented by the following formula [I], said random copolymer having an intrinsic viscosity [.eta.], as measured at 135.degree. C. in decalin, of 0.05 to 10 dl/g and a glass transition temperature (Tg) of at least 70.degree. C., ##STR2## wherein n is 0 or 1, m is 0 or a positive integer, R.sup.1 -R.sup.18 are each independently an atom or a group selected from the group consisting of hydrogen, halogen and hydrocarbon groups, R.sup.15 -R.sup.18, linked together, may form a monocyclic ring or polycyclic ring which may have a double bond, R.sup.15 and R.sup.16 or R.sup.17 and R.sup.18 may form together an alkylidene group.
The vinyl chloride resin compositions according to the present invention comprise a vinyl chloride resin [A], and a specific cycloolefin ring opening polymer or copolymer, or a hydrogenated product thereof [B], and/or a specific cycloolefin random copolymer [C]. Accordingly, it becomes possible to elevate the heat distortion temperature thereof, and improve the plastication and decomposition temperature thereof while the excellent flame retarding properties and small mold shrinkage factors are maintained.
The excellent properties of the vinyl chloride resin [A] are not impaired even when the vinyl chloride resin contains the cycloolefin ring opening polymer or copolymer, or hydrogenated product thereof [B] and/or the cycloolefin random copolymer [C].
DETAILED DESCRIPTION OF THE INVENTION
The vinyl chloride resin compositions according to the present invention are concretely illustrated below.
The present invention is based on the finding that the heat distortion temperature of the vinyl chloride resin [A] is significantly increased when the resin [A] contains the cycloolefin ring opening polymer or copolymer, or hydrogenated product thereof [B] and/or the cycloolefin random copolymer [C] ([B] and [C] may be generally referred to cycloolefin copolymers hereinafter).
The vinyl chloride resin composition according to the present invention comprises polymerization of a cycloolefin represented by the following formula [I], or a hydrogenated product thereof [B], and/or the following formula [I] [C], ##STR3## wherein n is 0 o
REFERENCES:
patent: 4140731 (1979-02-01), Nakamura et al.
patent: 4433105 (1984-02-01), Matsuda et al.
patent: 4614778 (1986-09-01), Kajiura et al.
patent: 4874808 (1989-10-01), Minami et al.
patent: 4931520 (1990-06-01), Yamanashi et al.
patent: 4992511 (1991-02-01), Yamamoto et al.
patent: 5180767 (1993-01-01), Sakai et al.
Mitsui Petrochemical Industries Ltd.
Seccuro, Jr. Carman J.
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