Claims
- 1. A laminate for electrical use comprising a plurality of cured laminated sheets of a base material impregnated with an unsaturated polyester resin composition consisting essentially of:
- (a) 64 to 73% by weight of an unsaturated polyester resin comprising (1) a crosslinking monomer and (2) an unsaturated alkyd consisting of the reaction product of maleinized dicyclopentadiene, an unsaturated polycarboxylic acid and a polyhydric alcohol, wherein the ratio of the amount of maleinized dicyclopentadiene to the sum of the amounts of maleinized dicyclopentadiene and unsaturated polycarboxylic acid is 40-80 mole %;
- (b) 36 to 27% by weight of a hardness adjusting soft unsaturated polyester resin which is different from said unsaturated alkyd and contains 50 mole % of diethylene glycol as a soft segment-producing polyol component and 18.7 mole % of adipic acid as its soft segment-producing polycarboxylic acid component; and
- (c) a curing catalyst.
- 2. A laminate for electrical use comprising a plurality of cured laminated sheets of a base material impregnated with an unsaturated polyester resin composition, wherein the unsaturated polyester resin composition consists essentially of:
- (a) 64 to 73% by weight of an unsaturated polyester resin comprising (1) a crosslinking monomer and (2) an unsaturated alkyd consisting of the reaction product of maleinized dicyclopentadiene, an unsaturated polycarboxylic acid and a polyhydric alcohol, wherein the ratio of the amount of maleinized dicyclopentadiene to the sum of the amounts of maleinized cyclopentadiene and unsaturated polycarboxylic acid is 40-80 mole %;
- (b) 36 to 27% by weight of a hardness adjusting soft unsaturated polyester resin which is different from said unsaturated alkyd and contains diethylene glycol as a soft segment-producing polyol component and adipic acid as its soft segment-producing polycarboxylic acid component; and
- (c) a curing catalyst,
- and wherein said laminate has a thickness of 0.5-5 mm, a flexural modulus of at least 180 Kg/mm.sup.2 at 100.degree. C., and a punchability at 50.degree.-80.degree. C. suitable for electrical use.
Priority Claims (1)
Number |
Date |
Country |
Kind |
57-108049 |
Jun 1982 |
JPX |
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Parent Case Info
This application is a continuation of application of Ser. No. 604,408 filed Oct. 29, 1990, now abandoned, which was a continuation of Ser. No. 253,325, filed Oct. 3, 1988, now abandoned, which was a continuation of Ser. No. 006,339, filed Feb. 2, 1987, now abandoned, which was a continuation of application Ser. No. 857,382, filed Apr. 21, 1986, now abandoned, which was a continuation of application Ser. No. 506,780, filed Jun. 22, 1983, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (2)
Number |
Date |
Country |
907245 |
Aug 1972 |
CAX |
2073214 |
Oct 1981 |
GBX |
Non-Patent Literature Citations (7)
Entry |
Lubin, G. Handbook of Composites, p. 18, Van Nostrand Reinhold Co. 1982. |
Nelson, Considerations: Dicyclopentadiene in Polyester Resins, 36th Annual Conference, Reinforced Plastics/Composites Institute, The Society of Plastic Industry, Inc. Feb. 16-20, 1981 (preprint). |
Vrany, Chemical Abstracts, vol. 48, Item 9421h (1964). |
Vrany, "Cyklopentadienove suorviny pro nenasycene polyesterove pryskyrice" (title of book unknown), pp. 78-79. |
Japanese Published Examined Patent Appln. No. 10825/1970 of Hitachi Kasei Kogyo Co., Ltd., and English translation thereof. |
The Merck Index, "Maleic Anhydride", p. 631 (1960). |
Nelson, Preprint, 36th Annual Conference, Reinforced Plastics/Composites Institute, The Society of the Plastics Industry, Feb. 16-20, 1981. |
Continuations (5)
|
Number |
Date |
Country |
Parent |
604408 |
Oct 1990 |
|
Parent |
253325 |
Oct 1988 |
|
Parent |
6339 |
Feb 1987 |
|
Parent |
857382 |
Apr 1986 |
|
Parent |
506780 |
Jun 1983 |
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